MW9076 Series
Optical Time Domain Reflectometer
Operation Manual
19th Edition
For safety and warning information, please read this
manual before attempting to use the equipment.
Keep this manual with the equipment.
ANRITSU CORPORATION
Document No.: M-W1659AE-19.0
Safety Symbols
To prevent the risk of personal injury or loss related to equipment malfunction, Anritsu Corporation uses the
following safety symbols to indicate safety-related information. Ensure that you clearly understand the meanings of
the symbols BEFORE using the equipment. Some or all of the following symbols may be used on all Anritsu
equipment. In addition, there may be other labels attached to products that are not shown in the diagrams in this
manual.
Symbols used in manual
DANGER
This indicates a very dangerous procedure that could result in serious injury or
death if not performed properly.
WARNING
This indicates a hazardous procedure that could result in serious injury or death if
not performed properly.
CAUTION
This indicates a hazardous procedure or danger that could result in light-to-severe
injury, or loss related to equipment malfunction, if proper precautions are not taken.
Safety Symbols Used on Equipment and in Manual
The following safety symbols are used inside or on the equipment near operation locations to provide information
about safety items and operation precautions. Ensure that you clearly understand the meanings of the symbols and
take the necessary precautions BEFORE using the equipment.
This indicates a prohibited operation. The prohibited operation is indicated
symbolically in or near the barred circle.
This indicates an obligatory safety precaution. The obligatory operation is
indicated symbolically in or near the circle.
This indicates a warning or caution. The contents are indicated symbolically in or
near the triangle.
This indicates a note. The contents are described in the box.
These indicate that the marked part should be recycled.
MW9076 Series
Optical Time Domain Reflectometer
Operation Manual
25
26
August
1999 (First Edition)
December 2008 (19th Edition)
Copyright © 1999-2008, ANRITSU CORPORATION.
All rights reserved. No part of this manual may be reproduced without the prior written permission of the
publisher.
The contents of this manual may be changed without prior notice.
Printed in Japan
ii
For Safety
DANGER
NEVER touch parts where the label shown on the left is attached. Such
parts have high voltages of at least 1 kV and there is a risk of receiving
a fatal electric shock.
WARNING
1. ALWAYS refer to the operation manual when working near locations
at which the alert mark shown on the left is attached. If the advice in
the operation manual is not followed there is a risk of personal injury
or reduced equipment performance. The alert mark shown on the left
may also be used with other marks and descriptions to indicate other
dangers.
2. IEC 61010 Standard
The IEC 61010 standard specifies four categories to ensure that an
instrument is used only at locations where it is safe to make
measurements. This instrument is designed for measurement
category I (CAT I). DO NOT use this instrument at locations specified
as category II, III, or IV as defined below.
Measurement category I (CAT I):
Secondary circuits of a device that is not directly connected to a
power outlet.
Measurement category II (CAT II):
Primary circuits of a device that is directly connected to a power
outlet, e.g., portable tools or home appliance.
Measurement category III (CAT III):
Primary circuits of a device (fixed equipment) to which power is
supplied directly from the distribution panel, and circuits running from
the distribution panel to power outlet.
Measurement category IV (CAT IV):
Building service-line entrance circuits, and circuits running from the
service-line entrance to the meter or primary circuit breaker
(distribution panel).
iii
For Safety
WARNING
3. Laser radiation warning
• NEVER look directly into the cable connector on the equipment
nor into the end of a cable connected to the equipment. There is a
risk of injury if laser radiation enters the eye.
• The Laser Safety label is attached to the equipment for safety use
as indicated in "Laser Safety" later in this section.
Electric Shock
4. To ensure that the instrument is earthed, always use the supplied
3-pin power cord, and insert the plug into an outlet with an earth
terminal. If power is supplied without earthing the equipment, there is
a risk of receiving a severe or fatal electric shock or causing damage
to the internal components.
Repair
5. This equipment cannot be repaired by the operator. DO NOT attempt
to remove the equipment covers or unit covers or to disassemble
internal components. Only qualified service personnel with a
knowledge of electrical fire and shock hazards should service this
equipment. There are high-voltage parts in this equipment presenting
a risk of severe injury or fatal electric shock to untrained personnel. In
addition, there is a risk of damage to precision components.
Calibration
6. The performance-guarantee seal verifies the integrity of the equipment.
To ensure the continued integrity of the equipment, only Anritsu
service personnel, or service personnel of an Anritsu sales
representative, should break this seal to repair or calibrate the
equipment. If the performance-guarantee seal is broken by you or a
third party, the performance of the equipment cannot be guaranteed.
Falling Over
Replacing Battery
7. This equipment should always be positioned in the correct manner. If
the cabinet is turned on its side, etc., it will be unstable and may be
damaged if it falls over as a result of receiving a slight mechanical
shock.
Always set up the equipment in a position where the power switch
can be reached without difficulty.
8. When replacing the battery, use the specified battery and insert it
with the correct polarity. If the wrong battery is used, or if the battery
is inserted with reversed polarity, there is a risk of explosion causing
severe injury or death.
iv
For Safety
WARNING
Battery Fluid
9. DO NOT short the battery terminals and never attempt to disassemble
the battery or dispose of it in a fire. If the battery is damaged by any of
these actions, the battery fluid may leak. This fluid is poisonous.
DO NOT touch the battery fluid, ingest it, or get in your eyes. If it is
accidentally ingested, spit it out immediately, rinse your mouth with
water and seek medical help. If it enters your eyes accidentally, do
not rub your eyes, rinse them with clean running water and seek
medical help. If the liquid gets on your skin or clothes, wash it off
carefully and thoroughly.
LCD
10.This instrument uses a Liquid Crystal Display (LCD). DO NOT subject
the instrument to excessive force or drop it. If the LCD is subjected to
strong mechanical shock, it may break and liquid may leak.
This liquid is very caustic and poisonous.
DO NOT touch it, ingest it, or get in your eyes. If it is ingested
accidentally, spit it out immediately, rinse your mouth with water and
seek medical help. If it enters your eyes accidentally, do not rub your
eyes, rinse them with clean running water and seek medical help. If
the liquid gets on your skin or clothes, wash it off carefully and
thoroughly.
v
For Safety
WARNING
Laser Safety
Before using this instrument, always ensure that the warning light is lit
when the optical output switch is turned on. If this warning light does not
turn on, the equipment may be faulty and for safety reasons should be
returned to an Anritsu service center or representative for repair.
Optical units for MW9076 Series Optical Time Domain Reflectometer
have Class 1, 1M laser emitting parts as specified in IEC 60825-1, or
Class I, II parts as specified in 21 CFR 1040.10 (Refer to Table 1).
The explanatory labels shown on “Laser Radiation Markings” are
attached
Never use optical instruments to directly view Class 1M laser products.
Doing so may result in serious damage to the eyes.
Table 1
Kind of Light Source
OTDR light source
Visible LD light source
Standard Name
IEC 60825-1
21 CFR 1040.10
Class 1
Class I
Class 1M
Class II
CAUTION
Use of controls or adjustments or performance of procedures other than
those specified herein may result in hazardous radiation exposure.
The use of optical instruments with this product will increase eye
hazard.
vi
For Safety
Class 1, 1M indicate the danger degree of the laser radiation specified
below according to IEC 60825-1.
Class 1:
Lasers that are safe under reasonably foreseeable conditions
of operation, including the use of optical instruments for
intrabeam viewing.
Class 1M: Lasers emitting in the wavelength range from 302.5 to 4000
nm that are safe under reasonably foreseeable conditions of
operation, but may be hazardous if the user employs optics
within the beam. Two conditions apply:
a) for diverging beams, if the user views the laser output with
certain optical instruments (for example, eye loupes,
magnifiers and microscopes ) within a distance of 100 mn ;
or
b) for collimated beams, if the user views the laser output
with certain optical instruments ( for example , telescopes
and binoculars ).
And, Class I, IIa, II indicate the degree of danger of the laser radiation
outlined below as defined by 21 CFR 1040.10.
Class I:
Class I labels of laser radiation are not considered to be
hazardous.
Class IIa: Class IIa labels of laser radiation are not considered to be
hazardous if viewed for any period of time less than or equal
3
to 1×10 seconds but are considered to be a chronic viewing
3
hazard for any period of time greater than 1×10 seconds.
The wavelength range of laser radiating is in 400 to 710 nm.
Class II:
Class II labels of laser radiation are considered to be a
chronic viewing hazard. The wavelength range of laser
radiating is in 400 to 710 nm.
vii
For Safety
Laser Radiation Markings
FDA (Attached when visible LD
light source installed and only
for exportation to the
United States of
America)
(Attached when visible LD
light source installed)
FDA (Attached when
visible LD light source
installed and only for
exportation to the United
States of America)
FDA (Attached only for exportation to the
United States of America)
viii
For Safety
CAUTION
Replacing Memory
Back-up Battery
This equipment uses a Poly-carbomonofluoride lithium battery to backup
the memory. This battery must be replaced by service personnel when it
has reached the end of its useful life; contact the Anritsu sales section
or your nearest representative.
Note: The battery used in this equipment has a maximum useful life of
7 years. It should be replaced before this period has elapsed.
External
Storage Media
This equipment uses memory cards as external storage media for
storing data and programs.
If this media is mishandled or becomes faulty, important data may be
lost. To prevent this chance occurrence, all important data and
programs should be backed-up.
Anritsu will not be held responsible for lost data.
Pay careful attention to the following points.
• Never remove the memory card from the pulse tester while it is being
accessed.
• The memory card may be damaged by static electric charges.
• Anritsu has thoroughly tested all external storage media shipped with
this instrument. Users should note that external storage media not
shipped with this instrument may not have been tested by Anritsu, thus
Anritsu cannot guarantee the performance or suitability of such media.
Floppy Disk
Do not place in a dusty area.
Clean the magnetic head periodically to ensure normal operation.
Refer to the section on cleaning the head later in this manual.
Use in a residential
environment
This instrument is designed for an industrial environment.
In a residential environment this instrument may cause radio
interference in which case the user may be required to take adequate
measures.
ix
Equipment Certificate
Anritsu Corporation certifies that this equipment was tested before shipment
using calibrated measuring instruments with direct traceability to public
testing organizations recognized by national research laboratories, including
the National Institute of Advanced Industrial Science and Technology, and
the National Institute of Information and Communications Technology, and
was found to meet the published specifications.
Anritsu Warranty
Anritsu Corporation will repair this equipment free-of-charge if a malfunction
occurs within one year after shipment due to a manufacturing fault, under the
condition that this warranty is void when:
• The fault is outside the scope of the warranty conditions described in the
operation manual.
• The fault is due to mishandling, misuse, or unauthorized modification or
repair of the equipment by the customer.
• The fault is due to severe usage clearly exceeding normal usage.
• The fault is due to improper or insufficient maintenance by the customer.
• The fault is due to natural disaster including fire, flooding, earthquake,
etc.
• The fault is due to use of non-specified peripheral equipment, peripheral
parts, consumables, etc.
• The fault is due to use of a non-specified power supply or in a
non-specified installation location.
In addition, this warranty is valid only for the original equipment purchaser. It
is not transferable if the equipment is resold.
Anritsu Corporation shall assume no liability for injury or financial loss of the
customer due to the use of or a failure to be able to use this equipment.
Anritsu Corporation Contact
In the event that this equipment malfunctions, contact an Anritsu Service and
Sales office. Contact information can be found on the last page of the printed
version of this manual, and is available in a separate file on the CD version.
x
Notes On Export Management
This product and its manuals may require an Export License/Approval by
the Government of the product's country of origin for re-export from your
country.
Before re-exporting the product or manuals, please contact us to confirm
whether they are export-controlled items or not.
When you dispose of export-controlled items, the products/manuals need
to be broken/shredded so as not to be unlawfully used for military purpose.
Disposal Procedure
The product that you have purchased contains a rechargeable battery.
The battery is recyclable. At the end of its useful life, under various state
and local laws, it may be illegal to dispose of this battery into the
municipal waste stream. Check with your local solid waste officials for
details in your area for recycling options or proper disposal.
Lifetime of Parts
The life span of certain parts used in this instrument is determined by the
operating time or the power-on time. Due consideration should be given to
the life spans of these parts when performing continuous operation over an
extended period. These parts must be replaced at the customer's expense
even if within the guaranteed period described in Warranty at the beginning
of this manual. For details on life span, refer to the corresponding section in
this manual.
xi
Crossed-out Wheeled Bin Symbol
Equipment marked with the Crossed-out Wheeled Bin Symbol complies with
council directive 2002/96/EC (the “WEEE Directive”) in European Union.
For Products placed on the EU market after August 13, 2005, please contact
your local Anritsu representative at the end of the product's useful life to
arrange disposal in accordance with your initial contract and the local law.
xii
CE Conformity Marking
Anritsu affixes the CE Conformity marking on the following product(s) in
accordance with the Council Directive 93/68/EEC to indicate that they
conform to the EMC and LVD directive of the European Union (EU).
CE marking
1. Product Model
Model:
MW9076xx Optical Time Domain Reflectometer
2. Applied Directive
EMC:
LVD:
Council Directive 2004/108/EC
Council Directive 2006/95/EC
3. Applied Standards
• EMC: Emission: EN 61326-1: 2006 (Class A)
Immunity: EN 61326-1: 2006 (Table 2)
IEC 61000-4-2 (ESD)
IEC 61000-4-3 (EMF)
IEC 61000-4-4 (Burst)
IEC 61000-4-5 (Surge)
IEC 61000-4-6 (CRF)
IEC 61000-4-11 (V dip/short)
Performance Criteria*
B
A
B
B
A
B, C
*: Performance Criteria
A: During testing normal performance within the
specification limits.
B: During testing temporary degradation, or loss of
function or performance which is self-recovering.
C: During testing, temporary degradation, or loss of
function or performance which requires operator
intervention or system reset occurs.
Harmonic current emissions:
EN 61000-3-2: 2006 (Class A equipment)
: No limits apply for this equipment with an active input
power under 75 W.
LVD:
EN
61010-1:
2001 (Pollution Degree 2)
•
xiii
4. Authorized representative
Name:
Address, city:
Country:
xiv
Loic Metais
European Quality Manager
ANRITSU S.A. France
16/18 Avenue du Quebec SILIC 720 Zone de
Courtaboeuf
91951 Les Ulis Cedex
France
C-Tick Conformity Marking
Anritsu affixes the C-Tick marking on the following product(s) in accordance
with the regulation to indicate that they conform to the EMC framework of
Australia/New Zealand.
C-Tick marking
1. Product Model
Model:
MW9076xx Optical Time Domain Reflectometer
2. Applied Standards
EMC:Emission:
EN 61326-1: 2006 (Class A equipment)
xv
xvi
About This Manual
This operation manual explains the operation, calibration and maintenance of the
MW9076 Series Optical Time Domain Reflectometer (OTDR). The features of
the OTDR are described in “Section 1 Outline.”
1
2
This equipment can be connected to an external computer, from which the equipment can be controlled and the measurement results can be read out. Refer to the
following operation manual for information on the type of interface to be used for
connecting this equipment to an external computer.
MW9076 Series Serial Interface Operation Manual (M-W1660AE)
3
4
5
6
7
8
Index Appendix
9
I
Table of Contents
For Safety ......................................................
iii
About This Manual ........................................
I
Section 1 Outline..........................................
1-1
1.1 Overview of MW9076 Series Optical Time
Domain Reflectometer ...............................................
1.2 Features .....................................................................
1-2
1-4
1.3 Loss and Total Return Loss Measurement and
Splice & Return Loss Measurement ..........................
1-11
1.4 Reflection Height Measurement ................................
1.5 Total Return Loss Measurement ...............................
1-12
1-13
1.6 Linear Approximation Methods LSA/2PA ..................
1-14
Section 2 Before Use ...................................
2-1
2.1 Equipment Composition .............................................
2.2 Connecting the Power Supply ...................................
2-2
2-5
2.3 Battery Pack ..............................................................
2.4 Names of Parts ..........................................................
2-6
2-8
2.5 Replacing the Optical Connector ...............................
2.6 Installing and Removing the OTDR Main Unit ...........
2-12
2-13
2.7 Connecting the Optical Fiber Cable ...........................
2.8 Connecting Peripheral Units ......................................
2-14
2-15
2.9 Precautions ................................................................
2-25
Section 3 Setup and Setting of Peripheral
II
Units .............................................
3-1
3.1 Setting Method ...........................................................
3.2 Explanation of Setup Screens ...................................
3-2
3-6
3.3 Setting of the Peripheral Units ...................................
3.4 Reading, Saving, and Printing the Settings ...............
3-16
3-27
3.5 Preview ......................................................................
3-33
1
Section 4 Operation (OTDR Measurement)....
4-1
4.1 Turning on the Power ................................................
4.2 Setting the Measurement Conditions .........................
4-2
4-4
4.3 Starting a Measurement ............................................
4.4 Reading the Event Table ...........................................
4-9
4-10
4.5 More ...........................................................................
4.6 Auto Zoom .................................................................
4-13
4-15
4.7 Editing the Events ......................................................
4.8 Moving to the Manual Measurement Screen .............
4-16
4-26
4.9 Using the Repeat Task Function ...............................
4.10 Relative Distance Measurement ................................
4-30
4-39
4.11 Comparing Waveforms ..............................................
4.12 Measurement Examples ............................................
4-41
4-47
Section 5 Operation (OLTS Measurement) ....
5-1
5.1 OLTS Function ...........................................................
5.2 Setup .........................................................................
5-2
5-3
5.3 Loss Table .................................................................
5.4 Measurement Example (Optical Loss Measurement) ....
5-10
5-13
7
Section 6 Operation (CD Measurement) ....
6-1
8
6.1 Measurement Principles ............................................
6-2
6.2 Outline of Chromatic Dispersion Measurement .........
6.3 Measurement Procedures (Flow) ..............................
6-4
6-5
6.4 Details of Measurement Procedures .........................
6-7
Than Measurements ...................
7-1
7.1 Print ...........................................................................
7.2 File Operation ............................................................
7-2
7-8
7.3 Auto Increment Function ............................................
7-25
III
3
4
5
6
9
Index Appendix
Section 7 Operating the Functions Other
2
Section 8 Performance Test and
Calibration ...................................
8-1
8.1 Performance Test ......................................................
8.2 Calibration ..................................................................
8-2
8-19
8.3 Performance Test Result Record Form .....................
8-20
Section 9 Maintenance .................................
9-1
9.1 Optical Connector & Optical Adapter Cleaning.............
9.2 Cleaning the Floppy Disk Drive .................................
9-2
9-5
9.3 Self-Diagnosis ............................................................
9.4 Suggestions for Storage ............................................
9-6
9-8
9.5 Method of Transportation ...........................................
9-9
Appendix ...................................................... App-1
Appendix A Specifications ................................................
A-1
Appendix B Least Square Linear Approximation Method ..
Appendix C Splice Loss Measurement Principle ..............
B-1
C-1
Appendix D Return Loss Measurement Principle .............
Appendix E Total Return Loss Measurement Principle ....
D-1
E-1
Appendix F Settings at Factory Shipment ........................
Appendix G List of Recommended Printers ......................
F-1
G-1
Appendix H Marker Resolution .........................................
Appendix I Simple OTDR Operation Method ..................
H-1
I-1
Index
IV.
...................................................... Index-1
Section 1 Outline
This section explains the features of the MW9076 Series, equipment composition, and the measurement principle. For the performance and function specifica-
1.1
1.2
Overview of MW9076 Series Optical Time
Domain Reflectometer ...................................
1.1.1 Measuring cable loss and distance ....
1-2
1-3
Features ........................................................
1.2.1 Automatic search of faults
1-4
· · · Full Auto Mode/Auto Mode ..........
1.2.2 Detailed measurement: Manual Mode
1-4
1-5
1.2.3 Making the settings while checking
the measured waveform .....................
1-6
1.2.4 Simplification of repeated measurements ...
1.2.5 Reducing measurement errors ...........
1-6
1-7
1.2.6 Making high resolution measurements
1.2.7 Automatic detection of warning points
1-7
1-7
1.2.8 Event functions ...................................
1.2.9 Averaging and real-time functions ......
1-8
1-8
1.2.10 Saving and reading the measured
waveforms ..........................................
1-8
1.2.11 Waveform comparison function .......... 1-9
1.2.12 Changing from manual mode to automatic
mode .................................................. 1-9
1.2.13 Auto power off and automatic waveform
save function ......................................
1.2.14 Visible LD ...........................................
1-9
1-9
1.2.15 Automatic allocation of the marker for
the calculation of Splice Loss .............
1-9
1.3
1.2.16 Versatile measurement functions ....... 1-10
Loss and Total Return Loss Measurement and
1.4
Splice & Return Loss Measurement .............. 1-11
Reflection Height Measurement .................... 1-12
1.5
1.6
Total Return Loss Measurement ................... 1-13
Linear Approximation Methods LSA/2PA ...... 1-14
1
Outline
tions, refer to “Appendix A Specifications.”
1-1
Section 1 Outline
1.1
Overview of MW9076 Series Optical Time Domain Reflectometer
The MW9076 Series Optical Time Domain Reflectometer (OTDR) can be used
as an OTDR for supporting measurements at various wavelengths by combining
an MW9076 Series OTDR main unit with an MU250000A/A1/A4 display unit.
Since the model name of this equipment and the name of the OTDR main unit are
very similar and can give rise to confusion, they are distinguished in this document as shown below. The term “MW9076* OTDR” refers to the combination of
an MW9076 Series OTDR main unit and an MU250000A/A1/A4 display unit,
while the term “MW9076* OTDR main unit” refers to a single MW9076 Series
OTDR main unit.
The MW9076 Series OTDR has been developed for the detection of faults in
optical fibers during the installation and maintenance of optical fiber systems. It
can be used to measure the total loss, interval loss, and cable length (distance) of
an optical fiber system using laser light.
An automatic measurement procedure and small lightweight portable design facilitate its use in field installation and maintenance of optical fibers. In addition,
the internal memory can be used to save measured waveform data for subsequent
analysis and print-out. The MW9076 Series also has an interface for reading the
measurement results from a computer connected to this equipment.
Faults are located and losses can be automatically measured by just pressing the
[Start] key after setting the measurement conditions on the Setup screen.
Automatic Fault Location Full Auto Mode/Auto Mode
Detailed Measurement of Loss and Splice Loss
Manual Mode
Moreover, when the visible LD option is used, light leakage from the cable can be
easily observed.
In addition, when MW9076B/B1/C is used, the Optical Light Source and the Optical Power Meter (optional) function can be added as the Optical Loss Test Set
(OLTS) for easy measurement of the total loss of optical fibers.
1-2
1.1 Overview of MW9076 Series Optical Time Domain Reflectometer
Measuring cable loss and distance
When laser light of a specific wavelength is introduced into an optical fiber cable
from the OTDR, it is scattered as it propagates towards the far end of the cable.
Part of this scattered light returns to the OTDR as backscattered light. The intensity of this backscattered light is measured and is used to determine the cable loss.
In addition, the time duration from the introduction of the optical pulse into the
fiber unit till it return to the OTDR from a fault is used to calculate the distance to
the fault. For an accurate measurement, the light introduced into the fiber must
propagate to the far end of the cable and return to the OTDR as backscattered light
before the next optical pulse is sent into the fiber. Therefore, the length of the
measured cable is set as “Distance Range” on the Setup screen. When the “Distance Range” and “Pulse Width” are set to Auto, the OTDR sets the optimum
value of these parameters.
1-3
1
Outline
1.1.1
Section 1 Outline
1.2
Features
1.2.1
Automatic search of faults · · · Full Auto Mode/Auto Mode
This function is convenient to use when the user does not know the locations of
the faults.
In this mode, faults in the cable are detected and displayed by pressing the
Start key. Set the measurement mode to Full Auto or Auto in advance on the
Setup screen. After the measurement is completed, the following screen is displayed. Each fault point is indicated by an event symbol and the fault data is
displayed under the waveform in the form of a table. The fault is called an event
and this table is called an event table.
In Full Auto mode, the optimum “Distance Range”, “Pulse Width” and “Number
of times Averaging is performed” are estimated by the OTDR. In Auto mode,
these values are set on the Setup screen.
For details, refer to “Section 4.2 Setting the Measurement Conditions.”
Measurement conditions
Search results
Trace waveform
Event table
• Trace Waveform
The trace waveform is displayed with the attenuation on the y-axis and the
distance on the x-axis. The left-hand side of the trace display shows the OTDR
optical output while the right-hand side shows the far end of the fiber cable.
Each fault in the cable is marked with an event symbol.
• Measurement Conditions
Light Wavelength, Distance Range, Pulse Width, Index of Refraction (IOR),
Number of times Averaging is performed
• Search Results
Total Number of Faults, Total Fiber Length, Loss of the Entire Fiber
• Event Table
Number of Faults counted from the OTDR (No.), Distance from the OTDR,
Splice Loss, Return Loss, Total loss to the Fault.
Note:
Automatic measurement is a supporting function which enables to operate easier, it doesn't assure results. As there is a case of miss detection,
check the waveform as well.
1-4
1.2 Features
Detailed measurement: Manual Mode
In this mode, any position on the fiber can be measured by moving the markers to
it. Set the measurement mode to Manual in advance on the Setup screen and press
the Start key. In this mode, “Loss and Total Return Loss Measurement” for
obtaining the loss and total return loss of the cable and “Splice & Return Loss
Measurement” for obtaining the connection loss and return loss can be selected.
Two markers are displayed for “Loss Measurement” and six markers are displayed for “Splice & Return Loss Measurement.” A vertical cursor is displayed
at the selected marker. The measured values are displayed at the bottom of the
screen. Furthermore, in this mode, the Averaging mode which averages the measured value of each sweep, or the Real Time mode which rewrites the waveform
at each sweep, can be selected.
The following figure shows an example of Splice & Return Loss Measurement.
For details, refer to “Section 4.8 Moving to the Manual Measurement Screen.”
Measurement
conditions
Trace waveform
Marker
Measurement
results
Marker information
• Trace Waveform
The trace waveform is displayed with the attenuation on the y-axis and the
distance on the x-axis.
• Measurement Conditions
Light Wavelength, Distance Range, Pulse Width, Index of Refraction (IOR),
Number of Times of Averaging
• Measurement Results
Splice Loss, Return Loss
Loss between Marker ×1 and ×2 (Fiber Loss ×1 - ×2)
Loss between Marker ×3 and ×4 (Fiber Loss ×3 - ×4)
• Marker
Six markers are displayed on this screen. The markers are indicated by numbers ×1, ×2, ×3, ×4 from the left.
• Marker Information
The position information for each marker and that for the OTDR is displayed.
1-5
1
Outline
1.2.2
Section 1 Outline
1.2.3
Making the settings while checking the measured waveform
Preview mode
In the Preview mode, the trace waveform is refreshed almost in real time (in about
0.1 to 0.5 seconds), permitting the adjustment of the connector connections while
checking the waveform. Since the preview mode is used to check the shape of the
waveform, it cannot be used as a measurement result.
Setting the measurement conditions while checking the measured
wavelength.
Measurement conditions can be set on the OTDR while the measurement is in
progress for those measurements and the measured waveform is displayed.
Therefore, the measurement conditions can be easily fine-tuned while checking
the measured results.
1.2.4
Simplification of repeated measurements
The OTDR provides functions for eliminating the necessity to perform repeated
operations such as measuring the cores of a multi-core fiber cable or measures the
wavelength by two or more.
Continuous automatic measurement of a multi-core fiber using the
optical channel selector.
Continuous, automatic measurements of a multi-core (4-core or 8-core) fiber can
be easily performed by installing an optical channel selector unit (optional) on the
OTDR. Since it can be integrated into the main unit, measurements can be easily
performed even on the field. The external optical channel selector can be controlled by using the RS-232C interface.
Continuous measurement by automatic switching of any combination of wavelengths.
The OTDR can perform measurements by automatically switching any combination of selectable wavelengths (determined by the OTDR main unit), allowing the
user to complete the measurements of all selected wavelengths in a single operation. Therefore, the user does not need to perform repeated measurements of
different wavelengths.
1-6
1.2 Features
Reducing measurement errors
The OTDR provides check functions for preventing an incorrect measurement
due to simple errors such as incorrect fiber connection.
Checking the communication light in the fiber under test
Any communication light in the fiber under test may affect the communication
itself and prevent the OTDR from performing an accurate measurement. To
eliminate this problem, the OTDR has the Active Fiber Check function for checking the communication light in the fiber cable connected to the OTDR.
Checking the connection states to the fiber under test
The OTDR checks if the fiber under test is firmly connected to the optical connector of the OTDR main unit in order to eliminate connection errors and to ensure
accurate measurements.
1.2.6
Making high resolution measurements
The number of measured data points can be switched among the following three
settings: high speed, normal speed, and high resolution. Since 40001/50001
points are sampled in the high resolution mode, all errors that could not be detected with the previous equipment can now be detected. It is also possible to
measure long distances with high resolution or to make a rough measurement at
high speed as required.
1.2.7
Automatic detection of warning points
By setting a warning level (threshold value) in advance, the OTDR automatically
displays marks for measurement results of the event table that have exceeded the
warning level. By checking the marks, it can be easily determined if the measurement results are acceptable or not.
1-7
1
Outline
1.2.5
Section 1 Outline
1.2.8
Event functions
The fault, the connecting point, and the far end of the fiber cable at the time of
Full Auto mode/Auto mode measurement are known as events. Events can be
easily measured using this event function.
Editing the event points
When performing an automatic fault search in Full Auto/Auto mode, the OTDR
may misidentify normal points as faults or miss real faults due to noise. By
switching to the Edit mode after the waveform is displayed, the user can eliminate
or move misidentified faults and add new faults. This function enables the user to
correct the erroneous faults and perform measurement.
Event registration function
With the event registration function, measuring points are preset as events and
measurements are made at the preset points. This function is convenient for making repeated measurements at the same fusing or connecting points during the
measurement of a multi-core fiber.
1.2.9
Averaging and real-time functions
The intensity of the backscattered light changes with distance. This effect is particularly large at the far end of the fiber and is observed on the screen as noise.
When the Averaging function is set to ON, the measurement is averaged each
time an optical pulse is sent into the fiber so that noise is reduced and a smoother
waveform is observed. Set the Averaging Time or Number of Times Averaging
is performed as the Averaging completion condition on the Setup screen. When
the F2 (Real Time) key is pressed, the OTDR enters the Real Time mode in
which the screen data is rewritten each time a measurement is performed.
1.2.10
Saving and reading the measured waveforms
The waveform displayed on the screen can be saved in the OTDR internal
memory, a memory card, or a FD. These saved waveforms can be read or printed
by a printer connected to the OTDR as required. And, the OTDR can search the
read waveform for faults or measure the points on which the markers are set.
File name and title auto-increment function
This function automatically increments the number specified for a title or file
name each time the file is saved. This function eliminates the inconvenience of
rewriting the title contents or file name each time the file is saved.
1-8
1.2 Features
Waveform comparison function
Reads the waveform that is saved in a file as the reference waveform for OTDR.
The reference waveform remains displayed on the OTDR monitor during measurement. This function displays the difference between the measured and reference waveforms, thus the difference in distance and level easily observable. This
makes it convenient to monitor aging or compare multiple fibers. See “Comparing Waveforms” in section 4.11 for details.
1.2.12
Changing from manual mode to automatic mode
If the data has been collected in the Manual mode and then it is searched for faults
in the Auto mode, event markers are displayed at the faults and an Event Table is
displayed. Since a waveform, for which a sufficiently long time interval is used
for averaging, can be used in this mode, the fault misdetection rate can be reduced. It is also possible to edit event points as in Auto mode.
1.2.13
Auto power off and automatic waveform save function
When a key or a button is not pressed for a specified period of time, the power is
automatically switched off. This function can reduce the wastage of power when
batteries are used. In addition, this function stores the current waveform to be
measured automatically when the auto-power off is activated so that the measured result is not erased. The Setup screen is displayed when the power is turned
on again. Select “Close” on this screen to display the stored waveform. When
turning off the power for the unit using the power switch, it is possible to set
whether to save the waveform or not before just as with the auto power off function.
1.2.14
Visible LD
A light source with 635 nm wavelength is available as an option. Since the light
source emits visible light, faults in the dead zone of the OTDR can be detected
using leaked light. It can also be used for collating the cores of the multi-core
optical fiber.
1.2.15
Automatic allocation of the marker for the calculation of Splice Loss
When the measurement is switched from Loss & Total Return Loss Measurement
to Splice & Return Loss Measurement, five supplementary markers are automatically allocated at the most appropriate position around the * marker.
This eliminates having to allocate the supplementary markers.
1-9
1
Outline
1.2.11
Section 1 Outline
1.2.16
Versatile measurement functions
OLTS (Optical Loss Test Set) measurement function.
The OLTS measurement is used for measuring the loss of the fiber under test by
connecting the fiber under test between the light source and the optical power
meter. Measurements can be made by first reading the optical power of the light
source as the reference, and by obtaining the difference between the optical power
of the object under measurement using the optical power meter and the reference
optical power.
Since the MW9076B/C has a built-in light source as standard, it can make OLTS
measurements by installing an optional optical power meter. In addition, the light
source function and the optical power meter function can be used separately.
The MW9076B1 can have only the optical power meter function with the optional optical power meter installed.
Chromatic Dispersion measurement function
The MW9076D/D1 can perform Chromatic Dispersion measurements using only
one side of the fiber cable. This function allows the measurement of optical fiber
cables that have already been installed.
1-10
1.3 Loss and Total Return Loss Measurement and Splice & Return Loss Measurement
Loss and Total Return Loss Measurement and
1
Splice & Return Loss Measurement
Either Loss and Total Return Loss Measurement or Splice & Return Loss Measurement can be selected in the Manual mode.
(1) Loss and Total Return Measurement
Using this measurement, the distance between the × and * markers (DISTANCE), loss (LOSS), loss per km (FIBER LOSS), and total return loss
(TOTAL RETURN LOSS) can be measured. However, Total Return Loss
cannot be measured during waveform sweeping.
×
(2) Splice and Return Loss Measurement
Using this measurement, the loss at a connection can be measured. In this
measurement, a * marker is set at the connection and a pair of × markers is
set on each side of the * marker as shown in the figure below. If Fresnel
reflection occurs at the connection, a ∇ marker is set at the peak point.
The four × markers are called ×1, ×2, ×3, and ×4 from the left. The splice
loss is determined from the vertical difference at the * marker between
straight lines drawn between the ×1 and ×2, and ×3 and ×4 markers.
×1
×1
×2
×3
×4
×2
×3
×4
In this measurement, the distance between the ×1 and ×2 markers and that
between the ×3 and ×4 markers, as well as the fiber loss (loss per unit
L
Splice loss
length) are also displayed.
Loss for
cable length
of L
There is a section at the splice where the back scattered light cannot be
measured precisely during a time which is equivalent to the pulse width.
The distance L shown in the figure on the left is equivalent to this section.
Because of the distance L, the fiber loss in the L section is included in the
measurement if splice loss is measured using the same method as Loss Measurement.
More detailed explanations of the splice loss measurement and the return
loss measurement are given in “Appendix C” and “Appendix D,” respectively. For the total return loss, refer to “Section 1.5 Total Return Loss
Measurement.”
1-11
Outline
1.3
Section 1 Outline
1.4
Reflection Height Measurement
The reflection height measurement can be performed if “Height” is selected instead
of “Return Loss” in the “Reflective type” of the Display Setting of Menu.
If “Splice & Return Loss Measurement” is selected in the Manual mode, reflection (Height), instead of the return loss, is measured. In this measurement, six
markers are set in the same way as the Splice & Return Loss Measurement.
×1
Reflection height
×2
×3
×4
The measured value can be obtained from the difference in levels between the *
marker and ∇ marker.
In Auto mode, reflection (height), instead of the return loss, is measured. In the
automatic detection of events, the item “Return Loss” in the auto measurement
parameter on the Setup screen (2/3) cannot be used.
1-12
1.5 Total Return Loss Measurement
Total Return Loss Measurement
This measurement calculates the total return loss and displays it on the screen.
(a) Auto measurement mode
The total return loss from 0 km to the far end of the fiber cable is measured.
The backscattered level used as reference is in the location shown in the
following figure.
To measure the relative distance discussed later, the backscattered level at
the zero cursor location is used as reference.
The standard backscattered level of Total Return Loss
(b) Manual measurement mode
After sweeping is completed in the Loss Measurement mode, the total return loss between two markers (× and *) is calculated and displayed. These
markers can be moved to any position using the cursor keys.
Refer to “Appendix E” for an explanation of the total return loss measurement.
1-13
1
Outline
1.5
Section 1 Outline
1.6
Linear Approximation Methods LSA/2PA
In the Loss Measurement and Splice Return & Loss Measurement, the loss is
found by drawing an imaginary line between the two set markers. There are two
methods for drawing the line.
LSA (Least Square Approximation) Method
In this method, the line is drawn by computing the least square of the distances
from all the measured data between the two markers. This method is useful when
the data contains noise. Refer to Appendix B for further details.
×1
×2
2PA (Two Point Approximation) Method
This method draws a line linking the two measured data points at the two markers.
×1
×2
Comparison on LSA and 2PA
These two methods are compared for Loss Measurement and Splice Loss & Return measurement when the data contains a lot of noise as follows:
When LSA is selected
When LSA is chosen in the Loss Measurement, there is a probability of the occurrence of a large error when a fiber with splice loss is measured along its length.
LSA
Mis-measurement
2PA
Correct
measurement
When 2PA is selected
There is a probability of the occurrence of a large error when the noise is large.
An example of the Splice & Return Loss Measurement is shown below.
LSA
2PA
Correct measurement
1-14.
Mis-measurement
Section 2 Before Use
This section provides important information that should be thoroughly understood before actually using the MW9076 Series. In particular, it explains how to
charge the battery at first use after purchasing the OTDR.
2.2
2.3
2.4
Equipment Composition ................................
2-2
2.1.1 Standard composition .........................
2.1.2 Options ...............................................
2-2
2-4
Connecting the Power Supply .......................
Battery Pack ..................................................
2-5
2-6
2.3.1 Installing the battery pack ...................
2.3.2 Charging the battery pack ..................
2-6
2-7
Names of Parts ..............................................
2.4.1 Names of parts on the front, top,
2-8
and left sides of the device .................
2.4.2 Names of parts on the rear, bottom,
2-8
2.5
and right sides of the device ............... 2-10
Replacing the Optical Connector ................... 2-12
2.6
2.7
Installing and Removing the OTDR Main Unit ... 2-13
Connecting the Optical Fiber Cable ............... 2-14
2.8
Connecting Peripheral Units .......................... 2-15
2.8.1 Inserting and removing a memory
2
Before Use
2.1
card .................................................... 2-15
2.8.2 Inserting and removing a floppy disk .. 2-16
2.8.3 Connecting an optical channel
selector ............................................... 2-17
2.8.4 Connecting a printer ........................... 2-21
2.8.5 Connecting a computer ...................... 2-22
2.8.6 Connecting an external monitor ......... 2-23
2.8.7 Connecting a keyboard ...................... 2-24
2.9
Precautions .................................................... 2-25
2-1
Section 2 Before Use
2.1
Equipment Composition
2.1.1
Standard composition
The standard composition of MW9076 Series OTDR is listed in the following
table. After unpacking, check the packing list and make sure that all the components are included. If any part is missing or damaged, contact Anritsu or your
Anritsu sales agent immediately.
Name
Main unit
Accessories
Q’ty Model Name or
Ordering No.
Remarks
OTDR main unit
Packing list
1
1
MW9076*
Battery pack
1
CGR-B/802D
accessory box
or CGR-B/802E
Operation manual
Serial interface
1
1
W1659AE
W1660AE
Included in the
operation manual
Name
Main unit
Display unit
Q’ty Model Name or
1
Remarks
Ordering No.
MU250000A,
MU250000A1 or
MU250000A4
Accessories
2-2
Packing list
AC adapter
1
1
Included in the
accessory box
Power cord
Protective cover
1
1
Z0402
(with an exception
of the protective
Strap with hooks
1
Z0403A
cover)
2.1 Equipment Composition
OTDR main unit
Battery pack
Operation manual
and Serial interface
operation manual
Before Use
2
Packing list
Included in the
accessory box
OTDR Main Unit and Accessories
Power cord
AC adapter
Strap with hooks
Display unit
Included in the
accessory box
Protective cover
Packing list
Display Unit and Accessories
2-3
Section 2 Before Use
2.1.2
Options
The following optional parts can be chosen for the OTDR. Note that some may
need to be installed in an Anritsu factory. For the specifications, refer to “Appendix A Specifications.”
Visible LD (MW9076B/B1/C/D/D1/J/K-01)
Fiber abnormalities can be visually detected using this light source.
It is necessary to bring the OTDR to the Anritsu factory for its installation.
Optical power meter (MW9076B/B1/C-02)
This optional unit adds the function of the optical power meter to the OTDR. By
combining it with a light source, the loss of the fiber under test can be easily
measured.
It is necessary to bring the OTDR to the Anritsu factory for its installation.
High power optical power meter (MW9076B/B1/C-03)
A power meter for a high input of +23 dBm.
Simultaneous installation with the optical power meter (MW9076B/B1/C-02) is
not allowed.
It is necessary to bring the OTDR to the Anritsu factory for its installation.
Optical connectors (MW9076B/B1/C/D/D1/J/K-37-43)
Connectors for the OTDR main unit input/output, optical power meter input, and
light source output
-37: FC, -38: ST, -39: DIN, -40: SC, -43: HMS-10/A
They are all PC-type connectors.
Option 43 is for MW9076B/B1/C/D/D1 only.
Built-in optical channel selector (MU960001A, MU960002A)
MU960001A: 4 channels
MU960002A: 8 channels
The optical channel selector mounted between the display unit and the OTDR
main unit can be used as an integrated unit. This unit is for SM fiber only.
Other language display
-18: Chinese language display
Other languages are scheduled to be added one after another.
2-4
2.2 Connecting the Power Supply
Connecting the Power Supply
Connecting the AC adapter
Use the supplied accessory AC adapter.
Using an AC adapter other than the supplied one may damage the battery and the
OTDR.
Connect the AC adapter as shown in the figure below.
2
Before Use
2.2
DC power connector
AC adapter
Power plug
Power cord
CAUTION
Use a three-pin power plug. If you do not have a power
socket for a three-pin power plug, convert the three-pin
power plug into a two-pin power plug using a conversion connector and connect the ground line to the
earth. Failure to ground may damage the OTDR or you
may receive an electric shock.
The AC adapter is for the MW9076 only. Connecting it
to other devices may cause a failure or fire, Never use it
for other devices.
2-5
Section 2 Before Use
2.3
Battery Pack
2.3.1
Installing the battery pack
This section explains how to install/remove the battery pack to/from the OTDR.
Read the following explanation when replacing the battery pack.
Screw
Attachment
Battery pack
Installing the battery pack
(1)
Insert the battery pack into the OTDR main unit. (See the above figure for
the correct insertion direction of the battery pack.)
(2)
Install the attachment. Hook the attachment into the hollow on the front
right in the above figure and insert the attachment into the projection at the
(3)
center.
Fix the attachment with screws. Fasten screws with a screwdriver.
Removing the battery pack
(1)
(2)
Loosen the driver with a screwdriver.
Remove the attachment.
(3)
Pull out the battery pack.
CAUTION
Turn off the power before removing the battery pack.
The battery pack, the OTDR main unit and the display
unit may be damaged if the operation is performed with
the power turned on.
2-6
2.3 Battery Pack
Charging the battery pack
Charge the battery at an ambient temperature between 0 and 40 ˚C.
Charging does not start if the battery residual capacity is more than 80%.
The battery pack can be charged even when it is installed in the OTDR main unit.
To charge the battery pack, connect the supplied accessory AC adapter to the DC
power connector of the OTDR main unit, and then plug the cord into a receptacle.
When charging starts, the orange battery lamp is illuminated. Charging is performed irrespective of whether the power switch is turned on or off.
The battery charging takes for three hours to complete. Since the battery pack is
not charged at product shipment, charge it before using the products. In addition,
the battery pack is a consumable supply. The lifetime of the battery is reached
when the operating time becomes extremely short even if the battery is fully
charged. Replace the battery pack with a new one.
A charged battery pack becomes empty in about one week. Charge it before
using this device.
The battery pack may not start charging even if the ambient temperature is
between 0 and 40 ºC when the temperature of the battery exceeds this range.
Battery lamp
DC power connector
AC adapter
The charging status of the battery pack can be visually checked by the color of the
battery pack and lamp indication.
Lamp status
Green lamp is On
Battery pack status
Remarks
Discharging is under way or charging is
completed
Red lamp is On
Charging is required.
Orange lamp is On
Charging
Red lamp is blinking
Battery pack abnormality
Remaining charge: Less than 5 %
Remaining charge is less than 99.5 %
and AC adapter is connected.
Some abnormal condition such as over
discharge occurs.
Off
No battery
Battery pack is not installed
If the battery pack is not used for a long time, over discharge may occur.
In this case, charge the battery for 12 hours to return the battery pack to
normal.
The residual capacity of the battery pack can also be checked on the display. See
“4.1 Turning On the Power” for more information.
2-7
2
Before Use
2.3.2
Section 2 Before Use
2.4
Names of Parts
Check the name and function of each part.
2.4.1
Names of parts on the front, top, and left sides of the device
OTDR I/O connector
Light source output connector
Visible LD output connector
Floppy disk drive
Optical power meter input connector
Keyboard interface
Power lamp
Battery lamp
Battery
Memory card slot
Rotary knob
Menu key
VGA interface
Start key
DC power connector
Power switch
Back light and
contrast adjustment
knob
Function keys
Cursor keys
Select key
Serial port No.1
(RS-232C-1)
Power switch
A switch for turning on/off the power. ON when “I” is pressed.
Back light and contrast
adjustment knob
A knob for adjusting the contrast and brightness of the back-light. The brightness
of the back-light is switched by clicking the volume switch. The contrast is supplied when the display unit MU250000A1/A4 is installed.
The contrast can be adjusted by turning the volume switch.
2-8
2.4 Names of Parts
Status Display Lamp
Power lamp
It is illuminated when the power switch is turned on and power is supplied to the
OTDR main unit.
Start Key
Indicates the status of the battery by its color or by blinking. For the details of the
display, refer to “Section 2.3.2 Charging the battery pack.”
When this key is pressed, the measurement is started and laser light is emitted
from the OTDR I/O connector. Laser output can be stopped by pressing the
F5
(stop) function key.
Select Key
This key switches the functions of the Cursor keys. For details, refer to Page 2-11
“What is a card?”
Cursor Keys
The cursor keys consist of the top, bottom, right, and left keys. The function of
each key is displayed in the card displayed at the lower right of the screen.
In this manual, these keys are indicated by,
,
,
, and
arrows.
For information on the card, refer to Page 2-11 “What is a card?”.
Function Keys
Function Keys F1 to F5 are provided. The function of each key is displayed on
the right-hand side of the screen in a region known as the function key label.
Menu Key
Measurement-related functions are always displayed in the function key label.
Additional functions such as screen color and file operation can be selected by
pressing the Menu key.
The menu window can be displayed by pressing the Menu key. The functions that
can be selected on this screen are displayed in the function key label. The menu
items can be switched by pressing the
and
keys. The functions
can be selected using the function keys.
Rotary Knob
Mainly used for moving the selected markers. When a marker card is selected, it
functions in the same way as the cursor keys. By pressing the entire rotary knob,
markers to be moved can be switched.
2-9
2
Before Use
Battery lamp
Section 2 Before Use
2.4.2
Names of parts on the rear, bottom, and right sides of the
device
Printer port
Stopper
Serial port No. 2
(RS232C-2)
Stand
Nameplate
Nameplate
The serial number of the equipment and the option numbers of the installed options are indicated on the nameplate.
Stand
Use this stand by drawing it out for the vertical placement of the OTDR.
Pull the stand stopper upward to draw out the stand.
2-10
2.4 Names of Parts
What is a card?
When the cursor keys are effective, cards explaining the operations that can be
performed on this screen are displayed on the lower right-hand side of the screen.
The card at the front of the pile explains the functions of the Cursor keys on the
The card which comes to the front changes every time Select is pressed, .
and
The display on the right-hand side of the
and
keys and the
keys indicate the functions. If nothing is displayed on the
right-hand side of the arrows, no operation is performed even if a cursor key is
pressed.
Card
For example, in the figure above, the marker card is at the front, so the Cursor
keys can be used for selecting and moving markers.
The Cursor keys
the Cursor keys
and
are used for selecting the markers, while
and
are used for moving the markers.
To enlarge the waveform, press Select to put the zoom card at the front.
Now, the Cursor keys
direction, while the Cursor keys
and
are used for scaling in the vertical
and
are used for scaling in the
horizontal direction.
2-11
2
Before Use
card. The Cursor key functions depends on which card is at the front of the pile.
Section 2 Before Use
2.5
Replacing the Optical Connector
To replace the optical connector, pull the lever towards you until the latch is released. Then, remove the connector by lifting it.
Lever
Latch
Connector types are shown below for reference.
SC
ST
HMS-10/A
DIN
FC
interior of the
MW9076B/B1/C/D
CAUTION
When replacing the optical connector, take care not to
damage the connector and the connecting surface of
the connector.
WARNING
NEVER look directory into the laser radiation emitted
from the OUTPUT connector or the end of the cable
connected to the OTDR. If you do so, the laser light
may damage your eyes.
2-12
2.6 Installing and Removing the OTDR Main Unit
Installing and Removing the OTDR Main Unit
This section explains how to install and remove the MW9076* OTDR main unit.
Read the following explanation when replacing the OTDR main unit or installing
a built-in optical channel selector.
2
Removing the OTDR main unit
(1) Turn off the power switch of the equipment.
(2)
(3)
Loosen the four screws used for fastening the OTDR main unit to the rear
side of the equipment (see the figure below) using a screwdriver. The four
screws cannot be completely unscrewed from the equipment.
After loosening the four screws, the OTDR main unit can be separated from
the display unit.
OTDR main unit
Display unit
Connector
Installing the OTDR main unit
(1) Place the display unit under the OTDR and make adjustments in such a
manner that the connectors of the display unit and the OTDR main unit are
aligned. Take care not to damage the connectors during the operation.
(2)
Fasten the four screws of the OTDR main unit (see the figure above) with a
screwdriver.
CAUTION
Turn off the power before the installation or removal of
the OTDR main body. The OTDR main unit and the display unit may be damaged if operation is performed
with the power turned on. Perform the operation with
the protective cover attached, or the display unit is
damaged.
2-13
Before Use
2.6
Section 2 Before Use
2.7
Connecting the Optical Fiber Cable
Open the dust proof cover of the OTDR I/O connector and connect the optical
cable as shown in the figure below.
OTDR I/O connector
Light source output connector
Visible LD output connector
Optical power meter input connector
A common connector for OTDR I/O and light source output is provided if
MW9076B/C is used as the main OTDR unit. If the OTDR main unit is other than
the MW9076B/C, only the OTDR I/O connector is provided.
A visible LD output connector is provided when the optional visible LD
(MW9076B/B1/C/D/D1/J/K-01) is installed.
An optical power meter input connector is provided when the optional optical
power meter (MW9076B/B1/C-02, 03) is installed on the MW9076B/B1/C.
WARNING
NEVER look into the cable connecting end of the optical connector of the OTDR or the end of the cable connected to the OTDR. If you do so, the laser light may
damage your eyes.
CAUTION
The OTDR outputs high-power optical pulses. Please
disconnect the communication equipments from the
optical fibers before measurement in case that the optical sensor breaks.
2-14
2.8 Connecting Peripheral Units
Connecting Peripheral Units
2.8.1
Inserting and removing a memory card
Refer to “Appendix A Peripherals and Parts” for the available memory card.
The SRAM memory card for the MW9070 cannot be used.
A new memory card must be formatted before a file can be saved on it. A new
memory card must be formatted with the MS-DOS format before a file is saved
on it. (The memory card described in “Appendix A Peripherals and Parts” is formatted at the shipment.) Refer to “Section 7.2.4 Initialize (Format).”
Inserting a memory card
The memory card has a cutout to prevent misinsertion. Insert the card so that the
cutout is located as shown in the figure on the right. Do not insert a memory card
into the slot of the floppy disk drive.
The slot on the front is Drive 1.
Memory card
Cutout for
preventing
misinsertion
Drive 2
Drive 1
Front
Removing a memory card
The memory card can be removed by pressing the eject button as shown in the
figure on the right.
Eject button
Memory card
Front
CAUTION
If this media is mishandled, important data may be lost.
To prevent this chance occurrence, all important data
and programs should be backed-up.
Anritsu will not be held responsible for lost data.
Pay careful attention to the following points. In particular, never remove the ATA memory card from the pulse
tester, while it is being accessed.
2-15
2
Before Use
2.8
Section 2 Before Use
2.8.2
Inserting and removing a floppy disk
A 2HD floppy disk can be used.
A new floppy disk must be formatted before a file can be saved on it. In the IBM
format, the capacity is 1.44 Mbytes (18 sectors/track). Refer to “Section 7.2.4
Initialize (Format).”
To save data in a floppy disk, check that the notch of the floppy disk is not set to
write protect (WP) before inserting it into the floppy disk drive.
Inserting a floppy disk
Insert a floppy disk in the direction as shown in the figure on the right.
If an opening is seen, the floppy
disk is write protected.
Floppy disk
Front
Removing a floppy disk
The floppy disk can be removed by pressing the eject button as shown in the
figure on the right.
Eject button
Front
CAUTION
1.
When saving data in a floppy disk or reading data
from it, the OTDR must be placed horizontally or
inclined using the stand.
2.
Use a floppy disk at a temperature of between 5
and 40 ˚C.
3.
Eject the floppy disk from the disk drive before
moving the OTDR.
4.
Do not keep floppy disks at a location where magnetic fields are present. The data may be destroyed.
2-16
2.8 Connecting Peripheral Units
Connecting an optical channel selector
Either a built-in or external optical channel selector can be controlled. The following channel selectors can be controlled.
Model name
Number of channels
Built-in
MU960001A
4
Built-in
MU960002A
8
External
MN9662A
8
External
MN9664A
16
External
MN9668A
32
Refer to Appendix A for the details of the built-in optical channel selector.
Refer to the operation manual of each channel selector for the details of the external optical channel selector.
When the main body of MW9076D/D1/J/K OTDR is mounted, a built-in optical
channel selector cannot be connected.
Installing a built-in optical channel selector
Insert a built-in optical channel selector between the display unit and the OTDR
main unit.
The installation and connection procedures of a built-in optical channel selector
are explained below.
Refer to “Section 3.3.4 Setting the optical channel selector” for the method of
setting the optical channel selector.
(1)
(2)
Turn off the power to the OTDR.
Remove the OTDR main unit. For details, refer to “Section 2.6 Installing
(3)
and Removing the OTDR Main Unit.”
Put the optical channel selector on the display unit in such a manner that the
connectors of the display unit and the OTDR main unit are aligned. Take
care not to damage the connectors during the operation.
(4)
Fasten the four screws for the optical channel selector (see the figure on the
next page) using a minus screwdriver.
(5)
Put the OTDR main unit on the optical channel selector in such a manner
that the connectors of the optical channel selector and the OTDR main unit
(6)
are aligned. Take care not to damage the connectors during the operation.
Fasten the four screws for the OTDR main unit (see the figure on the next
page) using a minus screwdriver.
2-17
2
Before Use
2.8.3
Section 2 Before Use
CAUTION
•
Before installing and removing the built-in optical
channel selector, make sure to turn off the power.
If turned on, the channel selector and the display
•
unit may be damaged.
Perform the operation with the protective cover attached, or the display unit is damaged.
Connectors
Screws for optical channel selector
Optical channel selector
Display unit
Screws for OTDR main unit
OTDR main unit
Connector
2-18
2.8 Connecting Peripheral Units
After the completion of the installation of the built-in optical channel selector,
connect the OTDR I/O connector and the Com connector of the built-in optical
channel selector with an optical fiber as shown in the figure below.
Before Use
2
Com connector for optical channel selector
Optical fiber
OTDR I/O connector
2-19
Section 2 Before Use
Connecting an external optical channel selector
An external optical channel selector can be controlled by using Serial Port No. 2
(RS-232C-2) of the OTDR.
The procedure for connecting an external optical channel selector is as follows.
(1)
Turn off the power to the OTDR.
(2)
Connect Serial Port No. 2 (RS-232C-2) of the OTDR to the serial port of the
external optical channel selector with a special serial interface cable. Refer
to the operation manual of the external optical channel selector for information on the serial port of the external optical channel selector.
(3)
Connect the OTDR I/O connector to the Com connector or the Com1 connector of the external optical channel selector with an optical fiber.
For the method of setting the optical channel selector, refer to “Section 3.3.4 Setting the optical channel selector.” For the serial interface cable, refer to “Appendix A Specifications (14) Peripherals and parts.”
2-20
2.8 Connecting Peripheral Units
Connecting a printer
The OTDR can be connected to a printer through a (D-sub 25-pin) printer port.
Connect the OTDR to the printer as shown in the figure below.
2
Before Use
2.8.4
Refer to “Section 3.3.2 Setting the printer” for the printer settings.
The pin arrangement of the printer port is shown below for reference.
No
I/O
1
O
STB
Name
Data Strobe
2
O
D0
Paralell Data
3
O
D1
Paralell Data
4
O
D2
Paralell Data
5
O
D3
Paralell Data
6
O
D4
Paralell Data
7
O
D5
Paralell Data
8
O
D6
Paralell Data
9
O
D7
Paralell Data
11
I
BUSY
Busy
12
I
PE
Paper End
15
I
ERROR
Error
18-25
–––
SG
Signal Ground
else
–––
–––
–––
2-21
Section 2 Before Use
2.8.5
Connecting a computer
The OTDR can be connected to a computer through a (D-sub 9-pin) RS-232C-1
interface.
Connect the OTDR to the computer as shown in the figure below.
Computer
Serial port No. 1
(RS-232C-1)
RS-232C interface
of the computer
For the setting of Serial Port No. 1 of the OTDR, see “3.3.3 Setting the serial
port”.
For the setting of the RS-232C interface on the computer side, refer to the operation manual of the used computer. The OTDR and the computer will not operate
properly if their settings do not match
The pin arrangement of Serial Port No. 1 (RS-232C) is shown below for reference.
2-22
No
I/O
1
I
DCD (CD)
Name
Carrier Detect
2
I
RXD (RD)
Receive Data
3
O
TXD (SD)
Send Data
4
O
DTR (ER)
Equipment Ready
5
–––
SG
Signal Ground
6
I
DSR (DR)
Data Set Ready
7
O
RTS (RS)
Request to Send
8
I
CTS (CS)
Clear to Send
9
–––
–––
–––
2.8 Connecting Peripheral Units
Connecting an external monitor
The OTDR can be connected to an external monitor through a (mini DIN 10-pin)
VGA interface. The VGA conversion cable is required for the connection. (See
Appendix A (14) Peripherals and Parts”)
Connect the OTDR to the external monitor as shown in the figure below.
2
Before Use
2.8.6
External monitor
VGA conversion cable
VGA interface
The pin arrangement of the VGA interface is shown below for reference.
No
Signal name
Function
1
RED
Red, signal line
2
RRTN
Red, return line
3
GREEN
Green, signal line
4
GRTN
Green, return line
5
BLUE
Blue, signal line
6
BRTN
Blue, return line
7
HSYNC
Horizontal synchronous signal
8
GND
Ground
9
VSYNC
Vertical synchronous signal
10
GND
Ground
2-23
Section 2 Before Use
2.8.7
Connecting a keyboard
The OTDR can be connected to a keyboard through a (mini DIN 6-pin) keyboard
interface.
Connect the OTDR to the keyboard as shown in the figure below.
Keyboard interface
Keyboard
The pin arrangement of the keyboard interface is shown below for reference.
No
Signal name
1
KBDATA (O.D.)
2
MSDATA (O.D.)
3
GND
4
+5 V
5
KBCLK (O.D.)
6
KSCLK (O.D.)
O.D.: Open drain output (+5 V pull up)
CAUTION
The keyboard should be connected or disconnected
only when the power supply to the equipment is off.
The keyboard will not function properly if it is connected or disconnected when the power supply is on.
Keyboard entry
Alphanumeric characters can be entered from the keyboard during the following
operations.
Operation from the keyboard cannot be performed except for the following operations.
• File name entry
• Title/header entry
• Event comment entry
2-24
2.9 Precautions
Precautions
Connector cover
The interface connector has a dust-proof cover. Do not remove the cover except
when a cable is to be connected to the connector.
Condensation
If the OTDR is carried from a low-temperature environment to a warm room,
there is danger of condensation in it. In this case, allow the OTDR to dry completely before turning on its power.
Exposure to extremely high temperature in vehicles
Do not leave the OTDR in a vehicle. The ambient temperature may exceed the
storage temperature (–20 ˚C or + 60 ˚C) which may result in the failure of the
OTDR. Do not expose the OTDR to an extremely high or low temperature.
Safety
Do not use an AC adapter other than the supplied accessory adapter. If another
adapter is used, the OTDR may be damaged because of nonconformity with the
required specifications.
2-25
2
Before Use
2.9
Section 2 Before Use
2-26.
Section 3 Setup and Setting of Peripheral Units
This section explains the items that can be set on the Setup screens and the
method of setting these items. It also explains the method of setting peripheral
units.
in this section indicates a panel key.
3.1
3.2
Setting Method ..............................................
Explanation of Setup Screens .......................
3-2
3-6
3.2.1 Setup screen 1 ................................... 3-6
3.2.2 Setup screen 2 ................................... 3-11
3.3
3
3.2.3 Setup screen 3 ................................... 3-14
Setting of the Peripheral Units ....................... 3-16
Setup and Setting of Peripheral Units
3.3.1 Setting the system .............................. 3-16
3.3.2 Setting the printer ............................... 3-19
3.3.3 Setting the serial port ......................... 3-21
3.3.4 Setting the optical channel selector .... 3-23
3.3.5 Setting the display on the screen ....... 3-24
3.3.6 Setting the color on the screen ........... 3-26
3.4
Reading, Saving, and Printing the Settings ... 3-27
3.4.1 Reading the DFN file .......................... 3-27
3.4.2 Saving the DFN file ............................ 3-29
3.4.3 Printing the settings ............................ 3-31
3.5
Preview .......................................................... 3-33
3-1
Section 3 Setup and Setting of Peripheral Units
The Setup screens are used to set and change the OTDR measurement parameters.
They are composed of Setup screen 1 (Setup <1/3>), Setup screen 2 (Setup <2/
3>), and Setup screen 3 (Setup <3/3>). Setup screen 1 is always displayed when
the OTDR is switched on. By pressing F1 (setup), the Setup screens can be
displayed from any measurement mode to change the measurement conditions.
When the OTDR power is turned off, the measurement conditions set at that time
are saved in the OTDR internal memory and the same conditions are read from
the memory when the power is turned on the next time. Furthermore, when the
measurement conditions have been presaved as a DFN (DeFiNition) file, the standard definition conditions can be recalled simply by reading the DFN file even
after various settings have been changed.
Note:
The DFN file can be only saved in the OTDR internal memory.
3.1
Setting Method
Setting items
The cursor can be moved up and down to any item by rotating the rotary knob or
by pressing the
and
keys.
The cursor is moved to the next item by moving the rotary knob clockwise or by
pressing the
key. (See the figure below.)
After the cursor can be moved to the target item, enter the item by pressing the
center of the rotary knob or by pressing Select .
After the setting is completed, move to the setting of measurement conditions
(parameters).
3-2
3.1 Setting Method
Changing the measurement conditions (parameters)
Some of the measurement conditions can be set by either selecting a parameter
from several options (numeric values or words) and by entering a numeric value.
Selecting a parameter
When an item is selected, a window showing its options (numeric values or
words) is opened.
Select the desired value by moving the rotary knob or by moving the
and
keys. (See the figure below.)
After the cursor is moved to the desired value, enter it by pressing the rotary knob
or by pressing Select . After the value is entered, the window closes and the
setting displayed on the screen is changed to the set value.
3-3
Setup and Setting of Peripheral Units
3
Section 3 Setup and Setting of Peripheral Units
Entering a value
Some of the measurement conditions cable set either by only entering a numeric
value or by entering ON/OFF and a numeric value.
When entering only a numeric value
After an item is selected, a window for entering numeric values is opened.
In this state, the value can be changed by +1 (–1) by moving the rotary knob or by
pressing the
(
) keys.
It is also possible to change the numeric value by entering the numerical digits. If
the
key is pressed once in this state in the above figure, the cursor is
moved to the second digit. (See the figure below.)
In this state, the value can be changed by +1 (–1) by rotating the rotary knob or by
pressing the
3-4
(
) keys.
3.1 Setting Method
When ON/OFF and a numeric value is entered.
After an item is selected, a window for entering the numeric values is opened.
If
is pressed in this state, ON is selected and the entry of a numeric value
is enabled. (See the figure below.)
If the
and
keys are pressed in this state, the value can be
changed by +1 (–1). (See the figure below.)
Move the cursor to the desired place by pressing the
change the value by pressing the
and
or
keys. If the
key and
is
pressed and held down, OFF is selected.
3-5
Setup and Setting of Peripheral Units
3
Section 3 Setup and Setting of Peripheral Units
3.2
Explanation of Setup Screens
This section explains each parameter in the Setup screens. The settings at the
time of shipment from the factory are explained in “Appendix F Settings at Factory Shipment.”
3.2.1
System
Setup screen 1
Select the measurement system (OTDR/OLTS/CD).
The OLTS measurement can be set on the MW9076B/B1/C onto which an optional optical power meter installed. The CD can be set on the MW9076D/D1 by
which Chromatic Dispersion measurements can be made.
OTDR
Parameter setting and OTDR measurements can be performed.
OLTS
The light source and the optical power meter can be set for making total loss
measurements.
CD
Chromatic Dispersion measurements can be performed.
Channel
Set the channel used when a built-in or external optical channel selector is connected. If no optical selector is used, ‘None’ is displayed.
3-6
3.2 Explanation of Setup Screens
Measurement mode
Mode
Select the measurement mode (Full Auto/Auto/Manual).
Full Auto
The distance range (Distance), pulse width (Pulse Width), attenuator (Attenuator), averaging limit (Averaging Limit Item and Value) are set to Auto and auto
search is performed.
Input attenuator (Attenuator) is set to Auto and auto search is performed. For
other items, the currently set measurement conditions are used.
Manual
Measurements are performed for the currently set measurement conditions and
splice measurements are made. Although auto search is not performed, the auto
marker that places supplementary markers for splice measurement at optimum
positions is displayed.
Event
Select the event table creation method (Auto Search/Fixed).
Auto Search
Auto search is performed again without taking the previous auto search result into
consideration.
Fixed
An event point near the event point that was detected in the previous auto search
is detected.
3-7
Setup and Setting of Peripheral Units
3
Auto
Section 3 Setup and Setting of Peripheral Units
Measurement Parameter
Wavelength
Switches the measurement wavelength.
Select one, or multiple wavelengths at one time, from installed wavelengths.
Settable wavelengths vary depending on the installed OTDR main unit.
MW9076B/B1: 1310 nm/1550 nm
MW9076C:
1310 nm/1550 nm/1625 nm
MW9076D:
1310 nm/1410 nm/1550 nm/1625 nm
MW9076D1:
1310 nm/1450 nm/1550 nm/1625 nm
MW9076J:
850 nm
MW9076K:
850 nm/1300 nm
When multiple wavelengths are specified, measurement is performed sequentially from shortest to longest.
For example, 1310 nm/1550 nm/1625 nm are specified for MW9076D, wavelengths will be measured from 1310 nm → 1550 nm → 1625 nm.
Note:
In the CD measurement mode, all installed wavelengths are always selected.
Distance
Select the distance range (Auto/1/2.5/5/10/25/50/100/200/250/400 km. Up to
100 km for MW9076J/K.).
If the distance range is set to Auto and Start is pressed, the optimal distance
range is automatically detected and displayed on the screen. If the total length of
the optical fiber is known, select a value slightly greater than the length. The
measurement takes a longer time if the selected value is very large. If a length
shorter than the fiber length is set, the measured data becomes wrong because the
ghosts appear on the accurate waveform.
About “Ghost”
A phenomenon that the wrong waveform like Flesnel reflection appears on some
points of the accurate waveform where normally no events exist.
This happens when inappropriate distance range is selected.
Pulse Width
Select the pulse width
(Auto/10/20/50/100/500/1000/2000/4000/10000/20000 ns. Up to 100 ns/1000 ns
for MW9076J/K.).
The shorter the pulse width, the higher the resolution, and the accurate the measurement. On the other hand, the shorter the pulse width, the smaller the power,
so that the noise component increases as the fiber cable length increases. If the
pulse width is set to Auto and Start is pressed, the optimum pulse width is
automatically detected and displayed on the screen.
3-8
3.2 Explanation of Setup Screens
Attenuation
Set the attenuator.
It is necessary to increase the pulse width for performing measurements with a
long fiber cable.
However, the increase in pulse width may cause saturation of the near-end of the
received wavelength. In this case, it is necessary to insert an attenuator. The
available attenuator values depend on the pulse width. If Full-auto or Auto is set
in the measurement mode, an optimal attenuator is automatically inserted and it
cannot be changed.
IOR (Index of Reflection)
Set the index of reflection (1.400000 to 1.699999).
changed.
Average Limit Item
Select the average count mode (Auto/Number/Time)
Measurement mode
Average Limit Item
Full Auto
Cannot be set
Auto
Auto/Number/Time
Manual
Number/Time
Auto
The number of times and the time are set automatically.
Number
The number of averaging is set and the specified data points are averaged.
Time
The time is set and the data collected during the specified time is averaged.
Average Limit Value
Set the number of averaging or time (1 to 9999 times or seconds).
If Average Limit Item is set to Auto, *** is indicated as the Average Limit Value
and no value can be set.
Back scattering level
Enter a corrected value (-9.99 to +9.99 dB) of the back scattering level.
The backscatter level is a constant number used for calculating the return loss and
total return loss.
3-9
Setup and Setting of Peripheral Units
3
When modifying the value in the IOR setting dialog, the displayed values of the
selection marker position or the selection event distance are automatically
Section 3 Setup and Setting of Peripheral Units
Sample Information
Data points
Select the number of sampling points (Quick/Normal/High).
The actual number of sampling points is determined by the settings of the distance
range (Distance) and Quick/Normal/High. The relationships between them are
explained in Sampling Resolution (Resolution).
Resolution
Display the sampling resolution.
The maximum values of the sampling resolution (Resolution) depending on the
distance range (Distance) and the number of sampling points (Data Points) are
shown below.
Distance
range
Sampling points
Quick
Normal
High
1 km
20 cm (5001)
5 cm (20001)
Cannot be set
2.5 km
50 cm (5001)
10 cm (25001)
5 cm (50001)
5 km
1 m (5001)
20 cm (25001)
10 cm (50001)
10 km
2 m (5001)
50 cm (20001)
20 cm (50001)
25 km
5 m (5001)
1 m (25001)
50 cm (50001)
50 km
10 m (5001)
2 m (25001)
1 m (50001)
100 km
20 m (5001)
5 m (20001)
2 m (50001)
200 km
40 m (5001)
10 m (20001)
5 m (40001)
250 km
40 m (6251)
10 m (25001)
5 m (50001)
400 km
80 m (5001)
20 m (20001)
10 m (40001)
The number in parentheses indicates the number of sampling points.
When the multiple wavelengths are set, High cannot be set.
The marker resolution is also determined by the range of the horizontal scale
indication and the sampling resolution on the screen. The distance of shift at
every click on the marker during the manual measurement is determined by the
marker resolution. (See Appendix H.)
Range
Indicates the sampling range.
The range determined automatically by the sampling resolution is displayed. The
sampling range cannot be set on the Setup screen.
3-10
3.2 Explanation of Setup Screens
3.2.2
Setup screen 2
Active fiber check
Set whether to check for communication light in the fiber under test before the
OTDR sends a light pulse.
ON: Check is made.
OFF: Check is not made.
If communication light is detected as a result of the check, the OTDR displays a
message, and then stops the measurement.
Connection check
Set whether to check the connection status of the fiber under test to the OTDR.
ON: Check is made.
OFF: Check is not made.
If any abnormality is detected in the connection status as a result of the check, the
OTDR displays a mark on the top right-hand side of the screen.
Visible LD
Set the output status of the optional visible LD. If a visible LD is not installed, it
is not displayed.
ON: Light is emitted.
OFF: Light is not emitted.
Blink: Blinks with a 50% duty cycle of 0.25 seconds.
If Visible LD is set to ON or Blink, red light is emitted. If the cursor is moved to
another item or to another screen, it is automatically set to OFF.
Since this red light is visible, abnormalities in the optical fiber can be visually
detected. However, this light cannot be used for measuring the loss or for detecting event points.
3-11
Setup and Setting of Peripheral Units
3
Section 3 Setup and Setting of Peripheral Units
WARNING
Never look into the optical connector of the OTDR nor
the end of the cable connected to the OTDR. If you do
so, the laser light may damage your eyes.
Caution - use of controls or adjustment or performance
of procedures other than those specified herein may
result in hazardous radiation exposure.
The following sub-window is displayed when the Visible LD is set to ON.
3-12
3.2 Explanation of Setup Screens
Event Threshold
Splice Loss
A point that indicates a splice loss greater than the set value is set as an event
(fault).
The set value is between 0.01 and 9.99 dB in steps of 0.01 dB.
A point that indicates a return loss greater than the set value is set as an event
(fault).
The set value is between 20.0 and 60.0 dB in steps of 0.1 dB.
Fiber End
3
A point that indicates a loss greater than the set value is set as the fiber far end.
The set value is between 1 and 99 dB in steps of 1 dB.
Warning Level
Wavelength
Indicates the measured wavelength. It cannot be selected on this screen. Refer to
Wavelength on “Section 3.2.1 Setup screen 1.”
Splice (Non Ref.)
Splice (Reflect)
Set the warning indication function after the measurement result is evaluated.
Set the warning indication ON/OFF for each item and the threshold when ON is
Return Loss
Height
specified. Select either “Return Loss” or “Height”.
Refer to the Reflective Type in “3.3.5 Setting the display on the screen.”
Fiber Loss
Total Loss
Total Return Loss
The evaluation items and the threshold setting range for each item are shown
below
Measured item
Average loss
Threshold setting range
Splice (Non Ref.)
0.10 to 10.00 dB (0.01 Step)
Splice (Reflect)
0.10 to 10.00 dB (0.01 Step)
Retrun Loss
60.0 to 20.0 dB (0.1 Step)
Height
1.0 to 20.0 dB (0.1 Step)
Fiber Loss
0.01 to 10.00 dB/km (0.01 Step)
Total Loss
0.1 to 60.0 dB (0.1 Step)
Total Return Loss
50.0 to 10.0 dB (0.1 Step)
Average Loss
0.01 to 10.00 dB/km (0.01 Step)
Splice (Non Ref.): Splice of event table. Events of No Reflect type is the object.
Splice (Reflect): Splice of event table. Events of Reflect type is the object.
Return Loss:
Height :
Return Loss of event table is the object.
Height of event table is the object.
Fiber Loss:
Total Loss:
dB/km of event table is the object.
Total Loss as the result of the search on the top right-hand
side of the screen.
Total Return Loss: Total Return Loss as the result of the search on the top rightAverage loss:
hand side of the screen.
The average loss as the result of the search on the top righthand side of the screen.
3-13
Setup and Setting of Peripheral Units
Return Loss
Section 3 Setup and Setting of Peripheral Units
3.2.3
Title
Setup screen 3
The title set here is displayed on the top of the screen displaying the trace waveform. Up to 32 characters can be displayed.
The string displayed in this title field is already entered.
Method of entering a title
The title input window is opened if Title is selected on the print setting screen.
Move the cursor to the desired location using the
and
Select the desired character with the rotary knob.
After entry is completed, press F5 (Close).
The selected characters are entered and displayed next to the Title.
3-14
keys.
3.2 Explanation of Setup Screens
Header
The headers entered here is printed or saved in a file. Up to 32 characters (one
line) can be entered. For comments, up to 64 characters (32 characters × 2 lines)
can be entered.
Both the title and the header exceed the displaying if the wide characters are used
and they cannot be displayed.
Data Flag
Select the Data Flag from the following.
BC (as_built) : During installation
Customer
Org Loc
RC (as_rapair) : During repair
OT (other) : Other
3
Term Loc
Cable ID
Fiber ID
Cable Code
Comment
If a header other than Data Flag is selected, the header input window (as in the
title input) is opened. Select the characters to be set.
Refer to “Method of entering a title” for the details of character input.
3-15
Setup and Setting of Peripheral Units
Operator
Owner
Section 3 Setup and Setting of Peripheral Units
3.3
Setting of the Peripheral Units
3.3.1
Setting the system
Set the OTDR system.
Each setting is fixed when the System Setting Screen shown in the figure below is
closed by pressing
F5 (Close). Note that pressing Start in the state
shown in the figure below causes the screen to return to the state prior to modification.
Menu and select Configuration by pressing
display appears.
. The following
Press
F1
F2
F3
F4
F5
Press
below.)
3-16
F1
(System). The system setting screen is displayed. (See the figure
3.3 Setting of the Peripheral Units
Date
Set whether to display the date, display format, and the date.
On: The date is displayed at the upper right of the screen. The date is
printed when printing is done.
Off: The date is not displayed on the screen. The date is not printed
when printing is done.
Set the display format of the date using the function key.
D-M-Y: Day, month, and year are displayed in this order.
M-D-Y: Month, day, and year are displayed in this order.
Y-M-D: Year, month, and day are displayed in this order.
To change the date, move the cursor to the place to be changed and set a new value.
Difference in time
Set the difference in time between the places where this equipment is used.
OTDR uses this information only when it saves or recalls a waveform data with
Standard, or Standard.V2 file format. (See 7.2.1 “Save” for more information
about file type.)
The local time set in the “Time” section does not change after setting the difference in time. For example, Set “+5:00” when using in New York.
Time
Set whether to display the time.
On: The time is displayed at the upper right of the screen. The time is
printed when printing is done.
Off: The time is not displayed on the screen. The time is not printed
when printing is done.
To change the time, move the cursor to the place to be changed and set a new value.
Auto Power Off
Set the elapsed time of the auto power off function that turns off the power automatically if the specified time has elapsed after the last key input.
3min: The power is turned off automatically if three minutes have
elapsed after the last key input.
5min: The power is turned off automatically if five minutes have
elapsed after the last key input.
15min: The power is turned off automatically if 15 minutes have elapsed
after the last key input.
30min: The power is turned off automatically if 30 minutes have elapsed
after the last key input.
None: The auto power off function is not set. The backlight does not
become dark or turn off.
Auto Power Off is always idle in the remote controlled state.
3-17
Setup and Setting of Peripheral Units
3
Section 3 Setup and Setting of Peripheral Units
Auto Backlight Off
Set the elapsed time of the auto backlight off function that turns off the backlight of
the screen automatically if the specified time has elapsed after the last key input.
3min: The back-light becomes dark automatically if three minutes have
elapsed after the last key input.
5min: The back-light becomes dark automatically if five minutes have
elapsed after the last key input.
15min: The back-light becomes dark automatically if 15 minutes have
elapsed after the last key input.
30min: The back-light becomes dark automatically if 30 minutes have
elapsed after the last key input.
None: The auto backlight off function is not set. The back-light does not
become dark.
However, it is turned off when MU250000A1 is mounted.
Returning from Auto Backlight Off
To return from Auto Backlight Off, move any key or rotary knob. Only the first
entry enables a return to the state prior to Auto Backlight Off. No operations
concerning OTDR measurement takes place in this case.
Example: Pressing
Start
Auto Backlight Off
while in Auto Backlight Off
Backlight On
Sweeping starts.
(No sweeping starts.)
Sound
↑
Start (First time)
Start (Second time)
Set whether the buzzer should be sounded when a key is pressed or when an error
occurs.
On:
Off:
Language
↑
Buzzer is sounded.
Buzzer is not sounded.
Switches the language of the displayed screen. However, an option for other language display can be required to be purchased beforehand for other language.
We plan to increase the number of languages to be covered one after another.
Press
F5
(Close) after language selection to close the System Setup screen.
This switches the language to be displayed.
Power off condition
Sets items to be saved when power is turned off.
The saved measurement conditions are restored the next time power is turned on.
Normal:
Saves all the measurement conditions for Setup.
All Data:
Marker position and waveform data are saved in addition to the measurement
conditions for Setup.
3-18
3.3 Setting of the Peripheral Units
Setting the printer
Set the printer type connected to the OTDR. A printer can be connected only to
the printer port of the OTDR.
Press
Menu
and select Configuration by pressing
. The following
display appears.
F1
3
F2
F3
F4
F5
Press
F2
(Printer Setting). The printer setting screen is displayed. (See the
figure below.)
Select one of the printer types displayed on this screen by moving the cursor. If
F5
(Close) is pressed in the selected state, the selected printer type is en-
tered.
See “Appendix G List of Recommended Printers” for more information on the
types of printers enabled to be used.
3-19
Setup and Setting of Peripheral Units
3.3.2
Section 3 Setup and Setting of Peripheral Units
When connecting the DPU-412 Thermal printer (Seiko Instruments), set the rear
dip switches as shown below. When shipped from Anritsu, they are set as below
and thus do not need to be changed.
1
2
Dip switches 1
3
4
5
6
7
8
1
2
Dip switches 2
3
4
5
6
7
8
ON
OFF
ON
OFF
Switches 1 to 5 and 8 are not used.
3-20
3.3 Setting of the Peripheral Units
Setting the serial port
Set the serial port (RS-232C) of the OTDR. The OTDR has two serial ports. Port
No. 1 is used to control the OTDR externally by connecting to an external computer. Port No. 2 is used to control an external device from the OTDR by connecting the OTDR to an external device.
Press
Menu
and select Configuration by pressing
. The following
display appears.
3
F1
F2
F3
F4
F5
Press
F3
(Serial Port). The serial port setting screen is displayed. (See the
figure below.)
3-21
Setup and Setting of Peripheral Units
3.3.3
Section 3 Setup and Setting of Peripheral Units
Connection
Set the format of the data to be transferred.
ACK&NACK: Transmit control code is added before and after the data
to be transferred.
Only the data to be transferred is sent.
Direct:
Refer to “MW9076 Series Serial Interface Operation Manual” for the details.
Serial Port No.2 is set whether it is used for the external channel selector.
It is used for the external channel selector, match the setting of connected channel
selector and the contents of the following items.
Do not set Flow Control.
Baud rate
Set the data transfer rate.
9600 bps, 19200 bps, 38400 bps, 57600 bps, or 115200 bps can be set.
For Port No. 2, up to 57600 bps can be set.
Parity
Set the method of parity check of the data to be transferred.
Odd: Odd parity
Even: Even parity
No:
Data bit
Parity check is not made.
Set the bit length of the data to be transferred.
5 bits, 6 bits, 7 bits, or 8 bits can be set.
However, for Serial Port No.1, only 8 bits can be set.
Stop bit
Set the stop bit of the data to be transferred.
1 bits or 2 bits can be set.
Flow Control
Set the transfer control method during data transfer.
Xon/Xoff: Software Control
(However, it cannot be set in Serial Port No.1.)
Hardware: Hardware control
None:
Data is transferred without transfer control.
Press
3-22
F5
(Close) after the modification of each value to fix the value.
3.3 Setting of the Peripheral Units
Setting the optical channel selector
When the external optical channel selector is used, Serial Port No.2 should be set
previously. Refer to “3.3.3 Setting the serial port” how to set.
Set the type of the optical channel selector as built-in or connected to the OTDR.
Menu and select Configuration by pressing
display appears.
Press
. The following
3
F1
F2
F3
F4
F5
Press F4 (Optical Switch). The optical channel selector setting screen is
displayed. (See the figure below.)
Place the cursor over the name of the optical channel selector type. The selected
optical channel selector type name can be entered by pressing
F5
(Close)
with the cursor placed over it.
‘None’ is displayed if the optical channel selector is not connected.
3-23
Setup and Setting of Peripheral Units
3.3.4
Section 3 Setup and Setting of Peripheral Units
3.3.5
Setting the display on the screen
Set the data of the waveform to be displayed on the measurement screen.
Press Menu
and select Display by pressing
. The following display
appears.
F1
F2
F3
F4
F5
Press
F1
(Display Setting). The screen display setting screen is displayed.
(See the figure below.)
3-24
3.3 Setting of the Peripheral Units
Distance Unit
Set the unit displayed on the measurement screen. If the unit is set here, all units
displayed on the screen are changed.
m, km, feet, kfeet, or mile can be set.
1 feet = 0.3048 m
1 mile = 1609.3 m
Set whether the reflectance (Height) or the return loss is measured at the time of
return loss measurement.
See “1.3 Loss and Total Return Loss Measurement and Splice & Return Loss
Measurement” and “1.4 Reflection Measurement” for more information on the
reflection and return loss.
Return loss: The return loss is measured.
Height:
Decimal Places (Distance)
The reflectance (the difference between ∗ and ∇ markers) is
measured.
Set the number of digits representing the distance to be displayed on the Measurement Screen. Setting the number of digits here changes all the display digits on
the screen.
Up to three decimal places (down to the digit of 1 m or 1 feet) or five decimal
places (down to the digit of 1 cm or 0.01 feet) are able to be set. However, when
unit of distance are set to m or feet, the value is displayed up to 1 cm or 0.01 feet
digits regardless of the digit setting.
Examples
Auto result select
Three digits
Five digits
Select one auto result display (loss) at the right top of the Measurement Screen Average Loss (=Total Loss/Fiber Length) or Total Return Loss.
3-25
3
Setup and Setting of Peripheral Units
Reflective type
Section 3 Setup and Setting of Peripheral Units
3.3.6
Setting the color on the screen
Set the screen color.
Press Menu
and select Display by pressing
. The following display
appears.
F1
F2
F3
F4
F5
Press
F3
(Color Palette). The color palette screen is displayed. (See the
figure below.) Select the item to be set and select the color.
This device has three types of default settings.
Press
3-26
F1
,
F2
or
F3
to set each default color.
3.4 Reading, Saving, and Printing the Settings
3.4
Reading, Saving, and Printing the Settings
When the power is turned off, the settings are saved in the OTDR internal
memory. When the power is turned on again, these saved settings are recalled.
The settings can also be saved in the file of four types. This file is called the DFN
file. At the time of factory shipment, the values described in “Appendix F Settings at Factory Shipment” are set. If frequently used standard measurement set-
ever, note that the settings of the chromatic dispersion measurement cannot be
saved into a DFN file.
3.4.1
Reading the DFN file
If the measurement parameters have been saved in the DFN file, they can be
recalled from any of Setup screens 1 to 3. The method of recalling the DFN file
from Setup screen 1 is explained below.
If
F1
(Recall DFN) is pressed when Setup screen 1 is displayed, the function
key labels are changed as shown on the next page.
If the function names are already registered, the function names are displayed on
the function key labels.
3-27
3
Setup and Setting of Peripheral Units
tings are written to this file, the settings can be reverted to the standard ones by
recalling this file after measurements are made while changing the settings. How-
Section 3 Setup and Setting of Peripheral Units
The function key label display on the left is in a state where the function names
F1
F2
F3
F4
are not registered when the DFN file is saved. (For the registration of a function
name, refer to “Section 3.4.2 Saving the DFN file.” If a function name is registered, the function name is displayed on each function key label.
From
F1
to
F4
(User Defined 1 to 4), select the DFN file to be re-
called.
If anyone of the keys
F1
to
F4
is pressed, the function key labels are
changed as shown below.
F5
If
F5
(Exit) is pressed, the function key labels return to the state shown on
the previous Setup screen.
If any of the User Defined keys 1 to 4 is selected, the function keys on the left are
F1
displayed and the confirmation message “Recall user defined measurement condition. OK?” is displayed.
F2
To recall the selected DFN file and set it to the OTDR, press
F3
the setting is completed, Setup screen 1 appears again. (Even if a DFN file is
recalled from Setup screen 2 or 3, Setup screen 1 is displayed.)
F4
F5
3-28
F1
(Yes). After
If F2 (No) is pressed in this state, the recall of DFN file is stopped and
returns to the Setup screen.
3.4 Reading, Saving, and Printing the Settings
Saving the DFN file
This section explains the method of saving the DFN file. It can be saved from any
of the Setup screens 1 to 3. The method of saving the DFN file from Setup screen
1 is as follows.
3
If
F2
(Save DFN) is pressed when the Setup screen 1 is displayed, the func-
tion key labels are changed as shown below.
If a function name is already registered, the function name is displayed on the
function key label.
The function key label display on the left is in a state where the function names
F1
are not registered.
From
F2
F1
to
(User Defined 1 to 4), select the DFN file to be saved.
F4
If any one of the keys
F1
to
F4
is pressed, the function key labels input
F3
screen is opened, and plain function key labels can be input.
Up to 20 characters and 1 line can be used for as a function name. However, it
F4
cannot be input if the broad fonts are used.
When the function key labels input screen is closed, the function key labels are
F5
changed to the display of the next page.
If
F5
(Exit) is pressed, the function key labels return to the state shown on
the previous Setup screen.
3-29
Setup and Setting of Peripheral Units
3.4.2
Section 3 Setup and Setting of Peripheral Units
F1
F2
F3
F4
F5
3-30
If the function key labels input screen is closed, the function keys on the left are
displayed. When F1 (Yes) is pressed, it is saved as a DFN file, and the
function labels return to the state shown on the Setup screen.
If
F2 (No) is pressed in this state, the saving of DFN file is stopped and
returns to the Setup screen.
3.4 Reading, Saving, and Printing the Settings
Printing the settings
This section explains the method of printing the settings assuming that the printer
is connected to the OTDR as described in “Section 3.3.2 Setting the printer.”
Press Menu . The following display appears.
F1
3
F2
F3
F4
F5
Press
F3
(Print). The printed setting screen is displayed. (See the figure below.)
3-31
Setup and Setting of Peripheral Units
3.4.3
Section 3 Setup and Setting of Peripheral Units
Format
Set the data to be printed. Select Setup to print the settings.
Waveform & Data: The waveform data and measurement results are
printed.
Data:
Only the measurement results are printed.
Setup:
The settings on the setup screen are printed.
Waveform, Data and Reference Waveform:
In the waveform comparison mode for MW9076,
the current and reference waveform data are
printed.
When this item is specified at normal OTDR or CD
measuring, the same contents as when “Waveform
and Data” is set are printed.
Header
Set whether to print the headers under Data Flag.
On: Printed
Off: Not printed.
Event Comment
Set whether to print the event comment set in the event.
On: Printed
Off: Not printed.
Title
The title displayed at the upper left of the screen can be entered.
The currently displayed string is already set.
See how to input the title in “3.2.3 Setup Screen 3” for the method of setting the
title.
Data Flag
Operator
Owner
Customer
Org Loc
Term Loc
Cable ID
Fiber ID
Cable Code
Comment
Set the header.
After the settings are completed, press
Printing is started.
Press
3-32
F2
F1
(Print Execute).
(Purge print jobs) to delete the contents of the internal print buffer.
3.5 Preview
Preview
After setting the Setup screens and connecting the optical fiber cable, the setting
and connection can be checked by pressing
F4
(Preview). Since the pre-
view function updates the trace waveform about every 0.1 seconds, the connection of connectors can be checked while checking the waveform. Even if the
OTDR is set to Full Auto or Auto mode, markers can be used during measurement
as in Manual mode.
3
The Setup screen is displayed.
Setup and Setting of Peripheral Units
3.5
Press
F4
(Preview).
3-33
Section 3 Setup and Setting of Peripheral Units
F1
F1
F2
F3
F4
F5
(Setup)
Stops the measurement and displays the Setup screen again.
F2
(Select λ)
Switches the measurement wavelength each time it is pressed.
The wavelength to be switched to varies the type of the OTDR main unit, as well
as those specified in Setup.
Example:
MW9076C: A wavelength (1310 nm) is specified on the Setup screen;
1310 nm → 1550 nm → 1625 nm → 1310 nm
MW9076C: Two wavelengths (1310 nm and 1625 nm) are specified on the Setup
screen;
1310 nm → 1625 nm → 1310 nm
F3
(Select CH)
Switches the channels of the optical channel selector built in (connected to) the
OTDR. Each time the key is pressed, the displayed channel is changed.
Example:
CH1 → CH2 → CH3 → CH4 → CH1 → CH2 → ... For the MU960001A
The number of channels depends on the optical channels selector built in (connected to) the OTDR.
F4
(Splice & Return Loss)
Switches the contents of the measurement. The selectable item is “Splice & Return Loss” or “Loss & TORL (Total Return Loss)”.
Each time the key is pressed, the displayed function key label is changed. Since
Splice & Return Loss is displayed in the above figure, the currently set measurement is Loss & TORL.
F5
(LSA)
Switches the linear approximation methods.
Each time the key is pressed, the displayed function key label is changed and the
settings are changed. Since LSA (Least Square Approximation) is displayed in
the above figure, the currently set measurement is 2PA (2 Pint Approximation).
See “1.6 Linear Approximation Methods LSA/2PA” and “Appendix B Least
Square Linear Approximation Method” for more information on how to perform
linear approximation.
CAUTION
The OTDR outputs high-power optical pulses. Please
disconnect the communication equipments from the
optical fibers before measurement in case that the optical sensor breaks.
3-34.
Section 4 Operation (OTDR Measurement)
This section explains how to operate the OTDR with the OTDR measurement as
an example.
in this section indicates a panel key.
4.1
Turning on the Power ....................................
4-2
4.2
4.3
Setting the Measurement Conditions ............
Starting a Measurement ................................
4-4
4-9
4.4
4.5
Reading the Event Table ............................... 4-10
More .............................................................. 4-13
4.6
4.7
Auto Zoom ..................................................... 4-15
Editing the Events .......................................... 4-16
4.7.1 Adding an event ................................. 4-17
4.7.2 Moving an event ................................. 4-19
4
Operation (OTDR Measurement)
4.7.3 Deleting an event ............................... 4-20
4.7.4 Fixing and researching an event ........ 4-21
4.7.5 Entering an event comment ............... 4-22
4.7.6 Input of landmark ................................ 4-24
4.8
Moving to the Manual Measurement
Screen ........................................................... 4-26
4.8.1 How to perform an accurate
measurement ..................................... 4-28
4.9
4.8.2 Returning to the Event Table screen .. 4-29
Using the Repeat Task Function ................... 4-30
4.9.1 Connecting the test fiber .................... 4-30
4.9.2 Setting the measurement conditions .. 4-31
4.9.3 Fixing an event ................................... 4-31
4.9.4 Moving to the Repeat task mode ........ 4-32
4.9.5 Setting the conditions for repeat task . 4-33
4.9.6 Reading the measurement result ....... 4-37
4.9.7 Constraints ......................................... 4-38
4.10 Relative Distance Measurement .................... 4-39
4.11 Comparing Waveforms .................................. 4-41
4.12 Measurement Examples ................................ 4-47
4.12.1 Measuring the absolute distance ........ 4-48
4.12.2 Measuring the relative distance .......... 4-49
4.12.3 Measuring the connection loss
(splice) ................................................ 4-51
4.12.4 Measuring the connection loss
(connector) ......................................... 4-52
4.12.5 Measuring the transmission loss ........ 4-54
4.12.6 Measuring the return loss ................... 4-55
4-1
Section 4 Operation (OTDR Measurement)
See “Appendix I Simple OTDR Operation Method” for more information.
4.1
Turning on the Power
This section explains the method of turning on the power. The explanation assumes that the battery pack has been charged or the AC adapter has been connected properly. Refer to the following sections to understand the charging
method or the AC adapter connection method.
Charging method: Section 2.3.2 Charging the battery pack
Connection method: Section 2.2 Connecting the Power Supply
Turn on the power switch on the left side of the OTDR. (Press the side indicated
with "|".)
If the OTDR is started normally, Setup screen 1 appears as shown below.
There is a possibility of OTDR failure if Setup screen 1 does not appear after the
power is turned on. In this case, turn off the power and contact Anritsu Corporation or your nearest service representative.
Note:
It takes about 1 minutes to display the Setup screen after the equipment
is switched on.
4-2
4.1 Turning on the Power
CAUTION
If the OTDR power is turned on while the power of the
printer connected to the OTDR is on, the OTDR may not
start up correctly, and then the following message may
be displayed.
Non-system disk or disk error
In this case, turn both the OTDR and printer power off,
and then turn the OTDR power on, again.
the all the screens displayed. Residual capacity shown on the indicator drops in
steps of 10% in the range between 100% and 10%, once below 10% it will drop to
5% and then to 3%.
Residual capacity of the battery pack between 100% and 40% is indicated in
green, below 40% is indicated in yellow and below 5% is indicated in red. When
residual capacity of the battery pack drops to 3%, information on setting conditions and displayed waveforms are stored into the memory on the main unit, and
the unit automatically turns off. When the unit is restarted, the measurement
conditions and waveforms are displayed again. Note that when the unit is turned
off by the power switch, waveforms will not be stored in memory. When turning
off the power for the unit using the power switch, it is possible to set whether to
save the waveform or not before just as with the auto power off function.
4-3
4
Operation (OTDR Measurement)
Display of Residual Capacity of the Battery Pack
An indicator of residual capacity of the battery pack is located at the top right of
Section 4 Operation (OTDR Measurement)
4.2
Setting the Measurement Conditions
The Setup screen is displayed after the power is turned on. Set the measurement
conditions on this screen. Refer to “Section 3.2 Explanation of Setup Screens”
for the meaning of each item on the Setup screen.
Setting measurements
OTDR is selected when MW9076B/B1/C/J/K is turned on. When MW9076D/D1
is turned on, the last measurement (either OTDR or CD) performed when it was
turned off is selected. Possible measurement selections are listed below.
MW9076B/B1/C: OTDR only, or OTDR and OLTS (when option 02 or
03 is mounted.)
MW9076D/D1:
MW9076J/K:
OTDR and CD
OTDR only
Setting the Channel
No channel can be set if a built-in or external optical channel selector is not connected. Since this explanation assumes that there is no optical channel selector,
the setting cannot be changed.
Setting the Measurement mode
First set Mode to Full Auto.
(1)
Place the cursor on Mode using the rotary knob or the
and
keys.
(2)
After the cursor is positioned on Move, press Select or press the rotary
knob. A window indicating options is opened.
(3)
In the window, place the cursor on Full Auto using the rotary knob or the
and
(4)
keys.
After the cursor is positioned on Full Auto, press Select or press the
rotary knob to enter the selected option. After the option is entered, the
window is closed and the Setup screen is displayed again.
When the measurement mode is set at Full Auto, the event is automatically set to
Auto Search.
4-4
4.2 Setting the Measurement Conditions
Setting the Measurement Parameters
First, set the Wavelength.
(1)
Place the cursor on Wavelength using the rotary knob or the
and
keys.
(2)
After the cursor is positioned on Wavelength, press Select or press the
rotary knob. A window indicating options is opened.
(3)
In the window, place the cursor on 1310 nm using the rotary knob or the
and
(4)
keys.
After the cursor is positioned on 1310 nm, press Select or press the rotary knob to enter the selected option. The window is closed and the Setup
screen is displayed again.
Since Mode is set to Full Auto for Distance, Pulse Width, and Attenuation value,
Auto setting is enabled for them.
Next, set IOR.
(1)
Place the cursor on IOR using the rotary knob or the
(2)
After the cursor is positioned on IOR, press Select or press the rotary
and
keys.
knob. A window is opened for setting the value.
(3)
In the window, place the cursor on the desired digit using the
and
keys and change the number with the rotary knob or the
and
(4)
keys.
After the value is changed, press Select or press the rotary knob to enter
the changed value. The window is closed and the Setup screen is displayed
again.
In this explanation, the IOR value 1.500000 is unchanged.
4-5
Operation (OTDR Measurement)
4
Section 4 Operation (OTDR Measurement)
Set sampling information
Set data points.
(1) Place the cursor on data points by using the rotary knob or the
and
keys.
(2) When you have placed the cursor, press Select or the rotary knob to
open the window to set data points.
(3) Move the cursor using the
and
keys, and select one from
Quick, Normal, and High.
(4) After you move the cursor, press Select or the rotary knob to determine
it. When you determine it, the window closes to return to the Setup screen.
Keep the data points at "Quick" here.
When the setting on Setup screen 1 is completed, the screen display is as shown in
the following figure.
Next, set the items on Setup screen 2.
When F3 (Setup 2/3) is pressed, Setup screen 2 appears. (See the figure
below.)
4-6
4.2 Setting the Measurement Conditions
Setting the Active Fiber Check
To make measurements on the actual communication line, set it to ON in order to
check for communication light. If measurements are not made on an actual communication line, set it to OFF.
(1)
Put the cursor on Active fiber check using the rotary knob or the
and
(2)
keys.
After the cursor is positioned on Mode, press Select or the rotary knob.
A window indicating options is opened.
(3)
In the window, place the cursor on ON or OFF using the rotary knob or the
and
(4)
keys.
After the cursor is positioned on ON or OFF, press Select or press the
rotary knob to enter the selected option. The window is closed and the
Setup screen is displayed again.
In this example, OFF is set.
Setting the Connection Check
To check the connection between the optical connector in the OTDR main unit
and the connector of the optical fiber connected to it, set it to ON. The connection
is checked at every measurements. The first check is performed immediately after
the optical fiber is connected. If no problems are found in the first check, it is
better to set this setting to off for the faster measurement.
Refer to the above paragraph “Setting the Active fiber check” for the settings.
4-7
Operation (OTDR Measurement)
4
Section 4 Operation (OTDR Measurement)
Setting the Event Threshold
Set the level for detecting events. The OTDR detects and displays the events
based on the value set here.
First, set the threshold level of Splice Loss.
(1)
Place the cursor on Splice Loss using the rotary knob or the
and
keys.
(2)
After the cursor is positioned on Splice Loss, press Select or press the
rotary knob. A window for setting a value is opened.
(3)
In the window, place the cursor on the desired digit using the
and
keys and change the numeric value using the rotary knob or the
and
(4)
keys.
After the value is changed, press Select or press the rotary knob to enter
the changed value. The window is closed and the Setup screen is displayed
again.
In this example, Threshold Splice Loss is set to 0.3 dB.
In the same way, set Return Loss and Fiber End of Event Threshold. In this
example, Return Loss is set to +40.0 dB and Fiber End is set to +1 dB.
When the settings on Setup screen 2 are completed, the screen display is as shown
in the following figure.
4-8
4.3 Starting a Measurement
Starting a Measurement
Start a measurement in Full Auto set in “Section 4.2 Setting the Measurement
Conditions.” This explanation assumes that setting in Full Auto measurement has
already been completed.
First, connect the optical fiber to be tested.
Refer to “Section 2.7 Connecting the Optical Fiber Cable “for the connection
method.
After the optical fiber is connected, press
When
Start
Start .
is pressed, the OTDR performs the following operation and dis-
plays the event table screen. (in Full Auto measurement)
(1) Performs automatic setting
Detects the optimum values of the distance range, pulse width, attenuation,
and averaging.
(2) Processes the waveform and searches for faults
Performs the smoothing of the waveform and detects the faults.
Calculates the information on each fault.
CAUTION
The OTDR outputs high-power optical pulses. Please
disconnect the communication equipments from the
optical fibers before measurement in case that the optical sensor breaks.
4-9
4
Operation (OTDR Measurement)
4.3
Section 4 Operation (OTDR Measurement)
4.4
Reading the Event Table
After the fault search is completed in Full Auto measurement, the following measurement waveform and event table are displayed.
Measurement conditions
Search results
Trace waveform
Marker
Event table
Cursor
The following items are displayed on the event table screen in the above figure.
Measurement conditions
CH: Optical channel selector
λ:
DR:
PW:
IOR: Index of refraction
ATT: Attenuation
Distance Range
Pulse width
AVG: The states of averaging
Wavelength of measured light
Res: Resolution
Note:
The displayed values of the items set to Auto are chosen by the OTDR.
Search results
Total:
Total number of faults
Total Loss: Total loss of fiber
Fiber Length: Length of fiber
Total Return Loss or Average Loss:
Total return loss from the connecting point between the OTDR and
the fiber to the sampling end point, or total loss/fiber length
Note:
“***.***km” is displayed for Fiber Length when the far end of the fiber
cannot be detected.
4-10
4.4 Reading the Event Table
Trace waveform
The waveform is displayed with the attenuation on the vertical scale and the distance on the horizontal scale. The scale of each axis is displayed at the bottom
right of the screen. The
symbol is displayed at each fault point.
Event table
The following values are displayed for each event.
No:
Fault number counted from the left of the screen
Position: Distance of the event from the OTDR
Splice: Connection loss
dB/km: Fiber loss
T.Loss: Total loss up to the point
4
Note:
If either the splice loss or return loss exceeds the event threshold value
set on Setup screen 2, the point is determined as a fault. A value below
the threshold value is enclosed by parentheses. If the measurement
value cannot be obtained for some reason such as the proximity of
faults, **.* is displayed.
Automatic measurement is a supporting function which enables to operate easier, it doesn't assure results. As there is a case of miss detection,
check the waveform as well.
key is pressed when the event table is displayed as shown be-
After the
low and the card is set to Event, the succeeding items can be seen.
Card
Press
No:
Fault number counted from the left of the screen
Position: Distance of the event from the OTDR
Splice: Splice loss
Spl Error: Splice-loss error
Then press
to scroll the page forward. Indications can move fast in the
table when multiple events exist.
4-11
Operation (OTDR Measurement)
Type: The types of the event
R.Loss: Return loss
Section 4 Operation (OTDR Measurement)
Event selection change
When the full automatic measurement is completed, No.1 of event table is selected where the cursor is placed. This cursor can be moved to change the selection of the event on actual trace waveform to read each event information, to
zoom in the view, to edit the event, etc. The
and
keys or the
rotary knob are used to change the event selection. However, the cursor movements vary.
and
keys: Move the cursor up and down in the events order in
the table. When the measurement of multiple wavelength is displayed in Disp.
All Traces as described later (see 4.5 More), events are listed in the order starting
from the near end regardless of the trace waveform (wavelength). When using
the
and
keys to move the cursor, the cursor moves to the next
event regardless of the wavelength and the marker display is moved to the trace
waveform of the wavelength corresponding to the selected event.
Rotary knob: The cursor moves between events of an identical wavelength only.
Before moving the cursor
After moving the cursor with the
key
After moving the cursor with the rotary knob
4-12
4.5 More
4.5
More
The following screen is displayed by pressing
or the manual measurement result screen.
F2
(More) on the event table
Multi Trace
When the measurement is performed using multiple wavelengths or all wavelengths, the event table and trace waveform of only one kind of wavelength are
selected first out of multiple trace waveforms. Press F4 (Multi Trace) to
change the selected display waveform, to display trace waveforms of all wavelengths, and to shift each waveform into the vertical axis direction for the comparison. By pressing F4 (Multi Trace), the following screen is displayed:
4-13
Operation (OTDR Measurement)
4
Section 4 Operation (OTDR Measurement)
Select Trace (F1)
Press F1 (Select Trace) to select event tables and trace waveforms of different wavelengths. Every time the button is pressed, the selected waveform is
switched and the event table is also changed corresponding to the wavelength.
Disp All Traces (F2)
By pressing F2 (Disp. All Traces), event tables and trace waveforms of all
measured wavelength are displayed. Events are listed in order starting from the
near end regardless of the wavelength.
When you want to display only one trace waveform and event table again, press
F2
(Disp. Selected Trace).
Adjust (F3)
It is used to compare waveforms measured in multiple wavelengths.
Whenever the F3 (Adjust) button is pressed, the overlap , each waveform
shifted and displayed on the vertical axis in the 0.5 division interval, the waveform shifted and displayed on the vertical axis in the 1 division interval, and the
adjustment OFF are switched in this description order. The reference position of
the shift is the marker position of the selected waveform.
Full View ON
By pressing
F5 (Full View ON), the entire waveform of the waveform currently viewed is displayed at the upper right of the screen. When a part of the
waveform is zoomed in, it is indicated by the frame currently displayed on the full
view screen. When you want to erase the full view screen, press
View OFF) again.
4-14
F5
(Full
4.6 Auto Zoom
Auto Zoom
Press
F3
(Auto Zoom) on the Event Table to enlarge the section which is
indicated by the marker and display information concerning this event at the bottom. Press
,
,
or
to move to the enlarged view
of the previous or following event when the Card is set at Event. See “4.7 Editing
Events” for more information on how to edit events.
Press
F3
(Event Table) to cancel Auto Zoom.
4
Operation (OTDR Measurement)
4.6
4-15
Section 4 Operation (OTDR Measurement)
4.7
Editing the Events
Edit the events to save the data of splices that are not included in the event table or
to delete points that are evaluated as faults because of noise.
When
F4
(Event Edit) is pressed on the Event Table screen, the following
Event Edit screen is displayed.
Events can be edited as shown below.
4-16
(1)
Adding an event
F1
(2)
Moving an event
F2
(3)
Deleting an event
F3
(4)
Registering and researching an event
(5)
Entering an event comment
F5
F4
4.7 Editing the Events
4.7.1
Adding an event
When
F1
(Add) is pressed on the Event Edit screen, the * and ∇ markers are
displayed along with two × markers on each side of these markers as shown below.
4
selected marker.
Select the * marker with the
and
Move the * marker to the desired position with the
keys.
and
keys.
After moving the * marker to the position at which an event is to be added, press
F2
(Event Type) to select the event type.
When the event type cannot be determined, select “Reflect.”
Non Ref:
Set when the event is non-reflection such as a fusing point.
Reflect:
Set when the event is reflection such as a splice point (Fresnel re-
F1
flection).
F2
F3
Fiber End:
Set when the event is the far end of the fiber under test.
F4
Group Event: Set when it is considered as one event if the multiple events cannot be
identified because they are so close.
F5
Exit:
Returns to the Edit (Add) screen without changing the event types.
4-17
Operation (OTDR Measurement)
The cursor is set on the
Section 4 Operation (OTDR Measurement)
After the event type is selected, the Event Edit screen is displayed again.
When
F1
(Add exec) is pressed, the Even Table screen is displayed again,
and the event is added.
An asterisk (*) is appended before the added event so that the added event is
recognized.
Added event
4-18
4.7 Editing the Events
Moving an event
Select the event to be moved by pressing the
and
keys with the
event card in the Event Edit screen selected.
After the event is selected, press
(Move).
F2
As shown in the following figure, the zoomed waveform with the selected event
at the center of the screen is displayed.
On this screen, six markers are displayed as in the Edit (Add) screen.
4
Select the ∗ marker with the
and
keys.
Move the ∗ marker with the
and
keys.
After moving the ∗ marker to the desired position, press
F1
(Move exec).
The movement of the event is entered and the Event Table screen is displayed
again.
An asterisk (∗) is appended before the moved event on the Event Table screen.
To change the event type of the event to be moved, press
change the event type before pressing
F1
F2
(Event Type) to
(Move exec).
4-19
Operation (OTDR Measurement)
4.7.2
Section 4 Operation (OTDR Measurement)
4.7.3
Deleting an event
Select the event to be deleted by pressing the
and
keys with the
event card in the Event Edit screen selected.
After the event is selected, press
F3
(Delete).
As shown in the following figure, the zoomed waveform within the neighborhood
of the selected event is displayed for confirmation.
If there is no error in the event to be deleted, press
F1
(Delete exec).
The event is deleted and the Event Table screen is displayed again.
It is not possible to restore the event after it is deleted by pressing
4-20
F1
.
4.7 Editing the Events
Fixing and researching an event
When the event edit screen is displayed, "Fixed" or "ReAutoSearch" is displayed
on the F4 function key label. When "Fixed" is displayed on the key label,
this instrument is set to "ReAutoSearch". When you press F4 (Fixed), the
setting is changed to "Fixed" and the F4 label changes to "ReAutoSearch".
Conversely, when "ReAutoSearch" is displayed on the key label, this instrument
is set to "Fixed".
(ReAutoSearch), the setting is changed to
When you press
F4
"ReAutoSearch" and the F4 label changes to "Fixed".
Fixed
If Fixed is selected while the event table is displayed, all the events displayed at
this point of time are stored in the OTDR internal memory. (The user cannot
access the data.)
If a measurement is started again in this state, the vicinity of the event table stored
in Auto Search is searched.
This function is effective when measurement is always made on the fixed point.
Re Auto Search (Researching an event)
If Re Auto Search is selected when an event table is created, event search is performed again on the waveform displayed at this point of time.
If Re Auto Search is executed, the event information in the OTDR internal
memory stored by Fixed is erased.
4-21
4
Operation (OTDR Measurement)
4.7.4
Section 4 Operation (OTDR Measurement)
4.7.5
Entering an event comment
A comment can be entered for each event displayed in the event table.
The following screen is displayed when Menu
is pressed on the Event Table
screen.
Select Event by pressing the
and
The following screen is displayed when
4-22
keys.
F1
(Event comment) is pressed.
4.7 Editing the Events
Select an event by rotating the rotary knob or by pressing the
and
keys.
and
The page can be changed with the
keys. Three events are
displayed on one page.
Press
F1
(Input Comment) after an event for which a comment is to be en-
tered is selected. A window is opened for entering the comment.
Comment input
window
Enter a comment by selecting the characters with the rotary knob and by moving
the cursor with the
and
After the entry is completed, press
keys.
F5
(Close). The selected string is entered
and set as a comment.
4-23
Operation (OTDR Measurement)
4
Section 4 Operation (OTDR Measurement)
4.7.6
Input of landmark
The landmark can be inputted for each event displayed in the event table.
The following screen is displayed when
Menu
is clicked on the event table
screen.
Select the event to be moved by pressing the
The following screen is displayed when
4-24
F2
and
keys
(Landmark) is clicked.
4.7 Editing the Events
Select the event using the rotary knob or the arrow
pages can be changed using the arrow
keys. The
keys. Three events are
displayed on one page.
After the selection of an event for which a landmark is to be inputted, click the F4
(Input Landmark) key. The Landmark selection window is opened.
Landmark selection
window
Select the Landmark using the rotary knob or the arrow
keys,
and execute it using the Select key.
4-25
Operation (OTDR Measurement)
4
Section 4 Operation (OTDR Measurement)
4.8
Moving to the Manual Measurement Screen
When
F5
(Manual) is pressed on the Event Table screen, the manual screen
can be displayed by using the data collected in Auto mode and various measurements can be made by using the markers as in the manual measurement.
To return to the Event Table screen, press
F5
(Event Table) on the Manual
Measurement screen.
The Manual Measurement screen is shown in the following.
Measurement conditions
Trace waveform
Marker position
Measurement results
Linear approximation
method
Six markers and the measurement results of splice loss and return loss are displayed on this screen. In addition, the following items are displayed.
Measurement conditions
CH: Channel of optical channel selector λ:
Wavelength of measured light
AVG:The states of averaging
IOR: Index of refraction
DR: Distance Range
Res: Sampling resolution
PW: Pulse width
ATT: Attenuation
Note:
For the items set to Auto, the values chosen by the OTDR are displayed.
Trace waveform
The trace waveform is displayed with the attenuation on the vertical scale and the
distance on the horizontal scale.
4-26
4.8 Moving to the Manual Measurement Screen
Measurement results
In the case of [Splice & Return Loss]
SPLICE LOSS (*):
RETURN LOSS (∇):
Splice loss at point *
Return loss at point ∇
FIBER LOSS (X1-X2): Loss between points X1 and X2
FIBER LOSS (X3-X4): Loss between points X3 and X4
In the case of [Loss & TORL]
Distance between × and ∗ markers
Loss between × and ∗ markers
FIBER LOSS:
Fiber Loss between × and ∗ markers
TOTAL RETURN LOSS: Total Return Loss between × and ∗ markers
4
Note:
**.* is displayed if the measurement cannot be performed because of
incorrect marker position. If the reflected light intensity exceeds the
measurement range of the circuit, the < symbol is appended in front of
the measured value.
Marker positions
The distance from the optical connector of the OTDR to each marker.
Linear approximation method
LSA (Least Square Approximation) or 2PA (2-point Approximation) is displayed.
Contents of function keys
(Condition)
F1
F1
Select this key to set the measurement conditions again. This key can call up the
Setup screen and the preview screen.
F2
(More)
F2
F3
F4
F5
Displays the next page of the function key label.
F5
At
, Full View ON or Full View OFF is displayed. When
F5
is
pressed in the ON state, the total waveform of the measurement result is displayed
at the upper right of the trace waveform display. When
F5
is pressed when
OFF is displayed, the total waveform display is erased.
F2
At
, Back is displayed. Pressing this key returns the display to the previ-
ous page (See the figure on the left.)
F3
(Loss & TORL)
Select this key to change the measurement results to loss measurement and total
return loss. When this key is selected once, the function key label is changed to
Splice & Return Loss. When this key is selected in this state, the measurement
results are switched to splice loss and return loss and the function label is returned
to the original one.
4-27
Operation (OTDR Measurement)
DISTANCE:
LOSS:
Section 4 Operation (OTDR Measurement)
F4
(2PA)
Select the linear approximation method. When 2PA is displayed at the function key
label, the least square approximation is selected. When this key is selected in this
state, the display is changed to LSA and the 2-point approximation is selected.
F5
(Event Table)
Displays the Event Table screen again.
4.8.1
How to perform an accurate measurement
(1) Set the marker correctly
It is necessary to set the markers properly to obtain accurate measurement
results. The good and bad examples of marker settings are shown below.
To measure the splice loss and distance correctly, it is necessary to set the *
marker or x marker for specifying the splice point at the beginning of the
step on the trace waveform as shown below.
Good
(a) Failling step
(b) Rising step
(c) Falling step with
Fresnel reflection
Bad
(a) Failling step
(b) Rising step
(c) Falling step with
Fresnel reflection
(2) Averaging
Read the measured values after obtaining a sufficiently smooth waveform
trace using averaging. If you are not sure how long or how many times
averaging should be performed, set a slightly larger value and press the
F5 (Stop) key when a smooth waveform is displayed on the screen
during averaging.
(3) Selecting LSA or 2PA linear approximation
Basically, use LSA to determine splice losses and 2PA to determine the total loss.
4-28
4.9 Using the Repeat Task Function
Returning to the Event Table screen
When
F5
(Event Table) is pressed on the Manual Measurement screen, the
event table can be displayed by using the data collected using the Manual Measurement screen and faults can be displayed by using event markers as in the
result of Auto Measurement.
4
Operation (OTDR Measurement)
4.8.2
4-29
Section 4 Operation (OTDR Measurement)
4.9
Using the Repeat Task Function
The Repeat Task function is used to execute a series of operations from executing
the measurement and recording the measurement results to printing the measurement screen while switching the optical channel selector and measurement wavelength. The execution result can also be checked in the Measurement Log table.
By using this function, all connector points in a multi-core cable can be automatically evaluated.
The measurement procedure for a multi-core fiber cable is shown below.
4.9.1
Connecting the test fiber
This explanation is based on the assumption that a built-in or external optical
selector is connected.
For the connection of an optical channel selector, refer to “Section 2.8.3 Connecting an optical channel selector.”
For the setting of an optical channel selector, refer to “Section 3.3.4 Connecting
an optical channel selector.”
Connect the test fiber to the input connector of the optical channel selector. The
number of connectable fibers is determined by the optical channel selector.
MW9076B/B1/C/D
OTDR
(Built-in or external)
optical channel selector
Test
cable
Test fiber
CAUTION
The OTDR outputs high-power optical pulses. Please
disconnect the communication equipments from the
optical fibers before measurement in case that the optical sensor breaks.
4-30
4.9 Using the Repeat Task Function
4.9.2
Setting the measurement conditions
Set the measurement conditions and events for continuous measurement.
First, set the optimum measurement conditions.
If the optimum measurement conditions are known, set them on the Setup screen.
After the settings are completed, perform a trial measurement to confirm that
these conditions are optimum.
If the optimum measurement conditions are not known, use of the Full Auto function is recommended. Settings can be easily made because the Full Auto function
makes measurements for the optimum measurement conditions and detects
events with the preset threshold value.
Refer to “Section 4.7 Editing the Events” for the Event Edit function.
4.9.3
Fixing an event
Register an event for performing repeated measurements at the event point set in
the previous section.
Refer to “Section 4.7.4 Fixing and researching events” for the details of event
Fixed.
This section explains only the method of registration on the assumption that the
event is set at the proper position.
An event can be fixed from the Event Edit screen, the Setup screen and the Continuous Measurement Setting screen.
From the Event Edit screen
F1
F2
F3
F4
The function key labels shown on the left are displayed on the Event Edit screen.
The event is registered when
F4
(Fixed) is pressed in this state.
See “3.2.1 Setup screen 1” from the Setup Screens.
See “4.9.5 Setting the continuous measurement conditions” from the Continuous
Measurement Setup Screen.
F5
4-31
4
Operation (OTDR Measurement)
For some measurement conditions, the events to be detected may not be detected.
Therefore, it is necessary to check the events by making a measurement.
If the event position is different from the desired one, set the event at the proper
position by using the Event Edit function.
Section 4 Operation (OTDR Measurement)
4.9.4
Moving to the Repeat task mode
Repeat task is executed based on the currently set conditions. The procedures to
move to the repeat task mode are as follows:
Press
Menu on the measurement completion screen to open the menu winand
keys. When you
dow. Select Application by using the
select Application, "Repeat task" and "Log Table" are displayed on F1 and
F3
of the function key labels, respectively.
Repeat task
By pressing
F1
(Repeat task), the following Repeat task screen is displayed:
Press
F1 (Repeat ON) here to delete the previously recorded log table and to
create a new log table. Afterward, move to the measurement condition setting
screen of repeat task as described later.
Press F2 (Continue) to display the previously recorded measurement log
table. Then press Start
to start measurement with the same condition as
previously done. The conditions for repeat task cannot be set. Continue cannot
be selected when no measurement log table is previously recorded and available.
Log Table
When a repeat task was previously executed and the measurement is performed
again without changing the measurement condition, press F3 (Log Table) to
display the measurement log table. By pressing
Start , the measurement is
started with the previous setting and the result is added to the measurement log
table. This function key has functions equivalent to those that can be selected
using the aforementioned F2 (Continue).
4-32
4.9 Using the Repeat Task Function
4.9.5
Setting the conditions for repeat task
Select
F1 (Repeat task) in the Application menu and press
ON) to display the following screen (example MW9076D):
F1
(Repeat
Set the conditions of the Repeat task function on this screen.
Repeat Channel
Set the measuring channel when the optical channel selector is connected.
MW9076 measures set channels by switching from one to the next. Channel
setting procedures are described below.
On the setting screen for sequential measurement conditions, when the cursor is
in the “Repeat Channel” item press Select or the rotary knob to display the
dialog box, as shown on the next page. Using
,
,
,
or the rotary knob move the cursor to the desired channel and then press
[Select] to set it as the measurement channel.
To cancel set channel, move the cursor onto it and press Select .
F1
To set multiple channels at the same time, press
(Row Sel/Unsel). Chan-
nels on the same line as the cursor are selected. (For example, pressing
F1
(Row Sel/Unsel) when the cursor is on Ch 2, sets Ch 1 to Ch 4 at the same time.)
To cancel a setting, press
F1
(Row Sel/Unsel) again.
To set all the channels at the same time, press
this setting, press
F2
F2
(All Sel/Unsel). To cancel
(All Sel/Unsel) again.
4-33
Operation (OTDR Measurement)
4
Section 4 Operation (OTDR Measurement)
Pressing
F5 (Close) after completing channel setting confirms the channel
settings and returns to the continuous measurement condition setting screen.
* When F5 (Close) is pressed with no channel set, “None” is displayed for
the “Repeat Channel” item. In this case, measurement is performed with the
lastly set channel.
* When the optical channel selector is not connected, “None” is displayed for
the “Repeat Channel” item and the item cannot be changed.
Repeat Wavelength
Set a wavelength to be measured continuously. Press Select or the rotary
knob while the cursor is located on a wavelength on the Repeat Condition Screen
to display a dialog box as shown in the figure below. Position the cursor on a
or
or the rotary knob, then
wavelength to be changed by using
press Select to display the Wavelength Selection dialog box. On this dialog
box, select On or Off. In order to establish the wavelength selected, press
F5 (Close) to bring the screen back to the Repeat Condition Screen mentioned above. If no wavelength has been selected, an error message appears
which then returns the settings to their initial settings.
4-34
4.9 Using the Repeat Task Function
4
Operation (OTDR Measurement)
Figure Dialog Box
Figure Dialog Box for Wavelength Selection
Figure Error Message
4-35
Section 4 Operation (OTDR Measurement)
Event
Displays the event point search method. Auto Search is set on the previous page.
If Fixed is set, Fix is displayed. To fix an event point, select Fix.
File Type
Set the file format (Standard/Standard.V2/Analysis) of the file to be saved.
File Compression
Set whether to compress the file to be saved.
On: Compressed
Off: Not compressed
Media
Select the media in which the file is to be saved.
Refer to “Section 7.2.1 Save” for the method of selecting the media.
Directory
Set the directory in which data is to be saved.
Refer to “Section 7.2.1 Save” for the method of specifying the directory.
File Name
Set the file name in which the measurement result for each waveform is to be
saved and the file name of the measurement log file. Refer to “Section 7.2.1
Save” for the method of setting the file name.
Print
Set whether to print the measurement results.
On: Printed
Off: Not printed
Press
Start
after the setting is completed. Continuous measurement is
started.
After the measurement is completed, the Measurement Log Table shown in
“Section 4.9.6 Reading the measurement result” appears. The measurement log
table is displayed even if the measurements are suspended.
4-36
4.9 Using the Repeat Task Function
4.9.6
Reading the measurement result
After the measurement is completed, the Measurement screen is changed to the
Measurement Log Table screen (see the figure below).
In the measurement log table, the measured data is controlled for each file name
and the maximum value of each measurement result is displayed. Splice Loss,
Return Loss, Fiber Loss (dB/km), Total Loss, and wavelength are displayed as
measurement results (see the figure above).
For a measurement result that exceeds the Warning Level set on the Setup screen, the
background color of the data in question is changed to indicate a Warning.
The cursor can be moved by pressing the
and
keys in the measurement log table so that a specific measurement log in the table can be selected.
Sort
File names displayed in the Measurement Log Table are sorted in the specified
order. Function key items displayed by pressing F1 (Sort) are as shown
below. Select the desired item order:
Splice (F1)
Return Loss (F2)
dB/km (F3)
Total Loss (F4)
Measure (F5)
Repeat Condition
The condition setting screen for repeat task is resumed.
Recall
By pressing F3 (Recall) after moving the cursor onto the specific log by
using the
or
keys, the measurement waveform is displayed on
the screen. Doing this allows the details of measured result to be checked.
4-37
Operation (OTDR Measurement)
4
Section 4 Operation (OTDR Measurement)
Print
Files selected in the Measurement Log Table or the file name list are printed. By
pressing
F4
(Print), the following function keys are displayed:
Print Execute (F1)
By pressing F1 (Print Execute) after selecting the file with the
F2 key
(Select/Cancel), the screen is displayed to select print contents. Press F1
(Print Execute) again after selecting the content. For the print content, see "7.1.1
Printing".
Select/Cancel (F2)
Selection is made by pressing
F2 (Select/Cancel) after placing the cursor on
the file to be printed. The selected file name is displayed in bold type. The
selection is cancelled by placing the cursor on the file name selected again and
pressing
F2
(Select/Cancel).
Select All/Cancel All (F3)
All files in the table are printed by pressing
are cancelled by pressing
F3
F3
(Cancel All).
(Select All). All selections
Table Print Execute (F4)
Print the measurement log table.
Exit (F5)
The print is stopped.
4.9.7
Constraints
The constraints regarding the use of Repeat Task function are shown below.
(1) Up to 500 measurement results can be stored in the measurement log table.
(2)
If the measurement result file does not exist in the specified media or directory, the
measurement waveform cannot be recalled from the measurement log table.
(3)
If a print output error occurs when continuous measurements are being executed
with the print output set to ON, the subsequent measurement is suspended.
(4)
If Auto Power Off is activated during continuous measurement due to the
shortage of remaining battery, the data measured at this time is not guaranteed. Before making continuous measurements, connect the AC adapter or
charge the battery.
(5)
(6)
The return loss of the fiber end isn't displayed.
When the Measurement Log Table is displayed and the distance unit is
changed, the value of “dB/km” is rounded off.
Accordingly, it may be influenced by the error.
4-38
4.10 Relative Distance Measurement
4.10
Relative Distance Measurement
In the relative distance measurement, data is calculated or displayed by setting the
relative measurement cursor (zero cursor) to 0 km. This function is effective
when a dummy fiber is used before the test fiber or when measurements are made
from a specific event point.
The distance to each marker, the values of Total Loss and Total Return Loss
displayed in the event table are displayed and calculated with the relative measurement cursor as reference.
When the waveform is not displayed, the zero cursor can be set.
on the measurement end screen to open the menu window.
Select Display with the
and
keys.
When Display is selected, H Offset is displayed at the function key label F2.
When
F2
(H Offset) is pressed, the distance of the zero cursor is displayed at
the bottom of the screen, and the zero cursor is displayed on the waveform screen.
Zero cursor
Distance of zero cursor
The zero cursor can be moved with the
knob and its position is set by pressing
When
F2
and
F1
keys or the rotary
(Set Offset).
(Clear Offset) is pressed, the zero cursor setting is canceled, and
the zero cursor is erased.
4-39
4
Operation (OTDR Measurement)
Press Menu
Section 4 Operation (OTDR Measurement)
When the zero cursor is set, the distance display of the marker is changed to that
from the zero cursor.
Distance from the
zero cursor
Constraints for relative distance measurement
(1) The zero cursor cannot be set when the waveform is not displayed.
(2)
If the distance range is changed after the zero cursor is set and the cursor
falls outside the distance range, relative measurement is canceled automatically.
4-40
4.11 Comparing Waveforms
Comparing Waveforms
Waveform comparison function
To monitor the aging of the fiber optic cable, waveforms at installation and those
now measured are compared.
This function is able to read the previously measured waveform as the reference
waveform for MW9076. The reference waveform remains displayed on the
MW9076 monitor during measurement. This function displays the difference
between the measured and reference waveforms, thus the difference in distance
and level easily observable. This makes it convenient to monitor aging or compare multiple fibers.
The two waveforms displayed are called the reference waveform and the current
waveform.
The current waveform can be measured again after changing the measurement
conditions. The marker moves on the current waveform, thus the displayed measurement result is that for the current waveform. The current waveform can also
be saved or recalled.
Though the reference waveform is displayed on the same scale as the current
waveform, measurement conditions cannot be changed and it cannot be measured
again.
Using/quitting the waveform comparison function
While MW9076 is in the OTDR mode, press Menu to open the menu win,
keys. (This menu is not
dow. Select “Application” using
displayed when CD, OLTS or Repeat Task are being executed.)
When “Application” is selected, “Trace compare” is displayed on the F2 function
key label. Pressing F2 (Trace compare) displays a file selection screen as
shown in the next page.
,
or the rotary
Move the cursor on the filename to be read using
knob.
After moving the cursor, press F2 (Reference Recall Exec).
4-41
4
Operation (OTDR Measurement)
4.11
Section 4 Operation (OTDR Measurement)
When
F2
(Reference Recall Exec) is pressed, MW9076 displays the follow-
ing message:
To measure using the same conditions as the selected waveform, press
F1
(Yes). The selected file is read as the reference waveform and also the current
waveform for MW9076.
To compare with the waveform already displayed on MW9076, press
F2
(No). The displayed waveform is left as it is and the reference waveform is read
for OTDR.
When the waveform comparison function is turned on, the following screen is
displayed:
The marker is displayed on the current waveform and can be moved, but cannot
be displayed on the reference waveform. Measurement results for the current
waveform are displayed in the measurement results display area at the bottom of
the screen.
Turning on the waveform comparison function also displays two vertical axis
bars that indicate the display position on the vertical axis. The left one is for the
current waveform and the right one is for the reference waveform. When the
current waveform is not displayed (no longer appears after switching the distance
range or wavelength), the left vertical axis bar for the current waveform also does
not appear. It will reappear when the waveform is displayed.
4-42
4.11 Comparing Waveforms
To turn off the waveform comparison function, press Menu to open the menu
window. Select “Application” using
,
keys. When “Applica-
tion” is selected, “Compare off” is displayed on the F1 function key label. Pressing
F1
(Compare off) turns off the waveform comparison function.
When the waveform comparison function is quit, the vertical axis bar for the reference waveform displayed on the right side of the screen is disappeared and exits
from the waveform comparison function.
Waveform difference display
To display the waveform difference, first set the waveform comparison function
on and display the reference and current waveforms. If multiple current waveforms are displayed, choose one. (When multiple wavelengths are chosen in
Setup at one time, and measured or multiple files are read all at once, multiple
current waveforms may be displayed.) Next, select “Menu” to open the menu
,
“Difference Wavewindow. By choosing “Application” with
form” is displayed in F2 function key label. Pressing
F2
(Difference Wave-
form) shows the waveform difference screen below.
On the waveform difference display, only one marker is displayed. The difference between the current and reference waveforms at the marker position is displayed in the measurement results area.
The waveform difference is calculated using the formula
: (current waveform) - (reference waveform).
4-43
Operation (OTDR Measurement)
4
Section 4 Operation (OTDR Measurement)
To return from the waveform difference screen to the waveform comparison
screen, press F5 (Exit).
Note:
To select one of the multiple current waveforms displayed, press
F2
(More) and then press
F4
(MultiTrace) on the next page
to display the multiple waveforms operation function. Pressing
F1
4-44
(Select Trace) switches the selected waveform.
4.11 Comparing Waveforms
In the waveform difference display, some functions are disabled. Such functions
are listed below:
Reading/writing initial conditions
Setting measurement conditions on the Setup screen
Preview
Manual measurements (measurements on the manual screen)
Event measurements (measurements in the event table and auto zoom screens)
Saving waveforms
Repeat Task function
To read the reference waveform in the waveform comparison mode, press
,
keys.
Menu to open the menu window. Select “File” using
When “File” is selected, “Recall” is displayed on the F2 function key label.
Pressing F2 (Recall) displays the waveform Recall screen shown in the figure next page. Move the cursor on the filename to be read using
,
or the rotary knob. After moving the cursor, press F2 (Reference
Recall Exce). Subsequent operation is the same as when first starting the waveform comparison function.
Vertically shifting the reference waveform
To shift the reference waveform vertically, first press F2 (More) on the
waveform comparison screen to display the functions on the next page. Pressing
F3 (Reference Trace) here displays the message shown on the next page.
,
while pressing F3 to shift the referAt this time, press
ence waveform vertically.
To cancel vertical shifting and return to the initial state, press F4 (Reset Ref.
V shift).
4-45
4
Operation (OTDR Measurement)
Reading the reference waveform
To change the reference waveform in the waveform comparison mode, read it.
The reference waveform is read by operating the keys shown below. It cannot be
recorded.
Section 4 Operation (OTDR Measurement)
When multiple current waveforms are displayed, press F2 (More) to display
the functions on the next page. Then press F4 (Multi Trace operation) to
display the multiple waveform operation function. For this function, F4
(Reset Ref. V shift) is displayed.
Displaying measurement conditions for the reference waveform
To display the measurement conditions for the reference waveform, first press
F2 (More) on the waveform comparison screen to display the functions on
the next page. Pressing F3 (Reference Trace) here displays the same message as that for vertical shifting.
while pressing F3 to display the measurement
At this time, press
conditions for the reference waveform.
4-46
4.12 Measurement Examples
Measurement Examples
Before performing the measurements using the measurement examples explained
in the following sections, it is necessary to set the OTDR as shown below.
(1)
Turn on the power switch and make sure that the Setup screen is correctly
displayed.
(2)
Set the measurement mode to manual on the Setup screen.
(3)
Select the measurement wavelength on the Setup screen.
(4)
Set the distance range (Distance) to 10 km on the Setup screen.
(5)
Set the pulse width (Pulse Width) to 100 ns on the Setup screen.
(6)
Set the index of the refraction (IOR) of the test optical fiber on the Setup
screen.
(7)
Exit the Setup screen and enter the Loss Display screen.
4
See “Appendix I Simple OTDR Operation Method” for more information.
CAUTION
The OTDR outputs high-power optical pulses. Please
disconnect the communication equipments from the
optical fibers before measurement in case that the optical sensor breaks.
4-47
Operation (OTDR Measurement)
4.12
Section 4 Operation (OTDR Measurement)
4.12.1
Measuring the absolute distance
The distance from the OTDR to the marker is measured.
Setup
Connect the units as shown below.
MW9076 Series
Connector point
Optical Fiber
Optical Fiber
more than 1 km
more than 1 km
The maximum cable length in this setup is 10 km.
Measurement procedure
Start .
(1)
Press
(2)
Set the * marker to the connector point or to the end of the fiber.
Note:
When measuring the distance to the connector points, set the marker on
the change point closer to the OTDR of the waveform. Refer to “Section 4.6.1 How to perform an accurate measurement.”
Connector point
Fresnel reflection point
(3)
Enlarge both the horizontal and vertical scale to the maximum.
(4)
If a large amount of noise is present, set Averaging to ON on the Setup
screen, and then perform the measurement again.
4-48
(5)
Position the cursor exactly at the fault.
(6)
The distance of the * marker displayed at the bottom of the screen is the
distance from the OTDR to the * marker.
4.12 Measurement Examples
Measuring the relative distance
The distance between markers is measured.
Setup
Connect the units as shown below.
MW9076 Series
Connector point
Optical Fiber
Optical Fiber
4
The maximum cable length in this setup is 10 km.
Measurement procedure.
(1) Press Start .
(2)
Press Select to put the card with the Marker on the tag, which is displayed at the bottom right of the screen, at the front of the card pile. The
marker can be moved with the
and
keys.
(3)
Select the × marker with the
(4)
Use the
and
keys to position the × marker on the rising
edge of the Fresnel reflection that appears at the connection between the
dummy fiber and the test fiber. Press Select to put the Zoom card at the
front of the card pile, and use the cursor keys to scale up the screen. Press
Select once again to put the Marker card at the front of the pile and
position the marker exactly at the rising edge of the trace.
and
keys.
×
×
(5)
Press Select to put the Zoom card at the front of the card pile and scale
down the screen with the cursor keys so that the Fresnel reflection at the
cable end is displayed.
(6)
Press Select to put the Marker card at the front of the card pile and select
the * marker with the
and
keys.
4-49
Operation (OTDR Measurement)
4.12.2
Section 4 Operation (OTDR Measurement)
(7)
Use the
and
keys to position the * marker at the rising
edge of the Fresnel reflection that appears at the end of the cable.
×
(8)
Press Select to put the Zoom card at the front of the card pile and use the
cursor keys to scale up the screen. Press Select once again to put the
Marker card at the front of the pile and position the marker exactly at the
rising edge of the trace.
(9)
If a large amount of noise is present, set Averaging to ON on the Setup
screen, and then perform the measurement again.
(10) The value indicated under Distance on the screen when the * marker is set,
is the distance between the markers.
Note:
When performing a measurement, be careful about the generation of
ghost waves. Ghosts are generated when the reflected light from a connector is reflected again at the OTDR. The waveform of the reflected
light as a ghost at twice the distance to the connector “d.” To eliminate
ghosts, decrease the reflection by adjusting the connections of the connector, applying grease at the connecting face of the cable, or taking
other measures.
Connector point
Ghost
d
2d
4-50
4.12 Measurement Examples
Measuring the connection loss (splice)
The connection loss of a splice in the fiber is measured.
Setup
Connect the units as shown below.
MW9076 Series
Spliced point
Optical fiber
Optical fiber
4
more than 1 km
more than 1 km
Measurement procedure
(1)
Press
Start . After the measurement is completed, set the * marker at
the beginning of the splice step closer to the OTDR.
(2)
Position the splice at the center of the screen and zoom up in such a manner
that as far as possible, the maximum length of the straight sections ((L1) and
(L2) in the figure below) of the fiber before and after the splice are included
in the screen and no other splices, connections, and fault points are included
on the screen.
L1
L2
(3)
Set “Averaging” to ON and start measurement again, then wait until a
smooth trace is obtained.
(4)
Press
F3
(Splice & Return Loss) to enter the Splice & Return Loss
F4
(LSA) to set the linear approximation method to LSA.
mode.
(5)
Press
(6)
The splice loss is displayed at the bottom left of the screen.
4-51
Operation (OTDR Measurement)
4.12.3
Section 4 Operation (OTDR Measurement)
Note:
When a splice other than the target splice or Fresnel reflection is displayed on the screen between two × markers, move the outermost ×
marker to the inside point as shown below so that another splice or
Fresnel reflection is not included between the two × markers. In this
case, the distance between the two × markers should be as long as possible.
Remove the marker
4.12.4
Measuring the connection loss (connector)
The connection loss of a connector in the fiber is measured.
Setup
Connect the units as shown below.
MW9076 Series
Connector point
Optical Fiber
Optical Fiber
more than 1 km
more than 1 km
Measurement procedure
(1) Press Start . After the measurement is completed, set the * marker at
the rising edge of the Fresnel reflection.
(2)
Position the Fresnel reflection point at the center of the screen in such a
manner that as long as possible, the maximum length of the straight sections
(L1) and (L2) of the fiber before and after the point are included in the
screen and no other splices, connections, and fault points are included on the
screen.
L1
L2
4-52
4.12 Measurement Examples
(3)
Set “Averaging” to ON and start measurement again, then wait until a
smooth trace is obtained.
(4)
Press
F3
(Splice & Return Loss) to enter the Splice & Return Loss
F4
(LSA) to set the linear approximation method to LSA.
mode.
(5)
Press
(6)
The connector loss is displayed at the bottom left of the screen.
Note:
displayed on the screen between two × markers, move the outermost ×
marker to the inside point as shown below so that another connector or
Fresnel reflection is not included between the two × markers. In this
case, the distance between the two × markers should be as long as possible.
remove the marker
4-53
4
Operation (OTDR Measurement)
When a splice other than the target connector or Fresnel reflection is
Section 4 Operation (OTDR Measurement)
4.12.5
Measuring the transmission loss
The optical fiber transmission loss is measured.
Setup
Connect the units as shown below.
MW9076 Series
measured optical fiber
less than10 km
Measurement procedure
(1)
Press
(2)
Press Select to put the Zoom card at the front of the card pile and use the
Start .
cursor keys to scale up the screen so that the entire trace waveform is displayed on the screen.
(3)
Set “Averaging” to ON and start measurement again, then wait until a
smooth trace is obtained.
(4)
Press
F3
(Loss & TORL) to set the Loss and Total Return Loss Mode.
(5)
Press
F4
(LSA) to set the linear approximation method to LSA.
(6)
Set the × marker at the near end of the fiber and the * marker at the rising
edge of the Fresnel reflection at the far end of the cable as shown below.
(7)
The transmission loss is displayed under LOSS at the bottom left of the
screen.
4-54
4.12 Measurement Examples
Measuring the return loss
The return loss of the connector is measured.
Setup
Connect the units as shown below.
MW9076 Series
measuring point
Optical fiber
Optical fiber
4
more than1 km
more than1 km
Measurement procedure
(1) Press Start .
(2)
Set the Splice & Return Loss mode.
(3)
Set the ∇ marker on the peak of the Fresnel reflection for the connector
under test. Put the Zoom card at the front of the card pile and scale up the
horizontal and vertical scales with the cursor keys so that the ∇ marker can
be accurately positioned.
(4)
Display the Marker card at the front of the card pile by pressing Select ,
and select the * marker with the cursor keys. Position the * marker at the
rising edge of the Fresnel reflection as shown below.
(5)
If a large amount of noise is present in the trace, set Averaging to ON.
(6)
The return loss is displayed under RETURN LOSS at the bottom left of the
screen.
4-55
Operation (OTDR Measurement)
4.12.6
Section 4 Operation (OTDR Measurement)
4-56.
Section 5 Operation (OLTS Measurement)
This section explains how to operate the OTDR with the OLTS measurement as
in this section indicates a panel key.
5.1
OLTS Function ..............................................
5-2
5.2
Setup .............................................................
5.2.1 More (OLTS) ......................................
5-3
5-9
5.3
5.4
Loss Table ..................................................... 5-10
Measurement Example
(Optical Loss Measurement) .......................... 5-13
5
Operation (OLTS Measurement)
an example.
5-1
Section 5 Operation (OLTS Measurement)
5.1
OLTS Function
The OTDR can measure the loss of the fiber under test by using a light source and
an optical power meter (optional). A measurement made by using the light source
and the optical power meter in combination is called the Optical Loss Test Set
(OLTS).
OLTS measurements can be made only with the MW9076B/B1/C OTDR main
unit equipped with Option 02 or 03. But the MW9076B1 has only the optical
power meter function. (No light source function.)
With the OLTS function, the loss of the fiber under test can be easily measured by
connecting the fiber under test to a light source and an optical power meter. Note
that the optical power A of the light source should have been measured in advance. When this optical power A is entered as the reference value, the loss of the
fiber or other devices under test is displayed as the measurement result.
Note that a measurement cannot be made on a multi-mode fiber.
Fiber or other devices
under test
Light source power A
Short fiber
MW9076B/B1/C
Output terminal of
the light source
Input of optical
power meter
The reference value, absolute value, and loss are displayed in this order on the
lower half of the OLTS screen. The loss is calculated by subtracting the absolute
value from the reference value.
5-2
5.2 Setup
Setup
From the OTDR measurement to the OLTS measurement
Display Setup screen 1 from the OTDR measurement.
When System is selected on Setup screen 1, the following window is opened.
5
When OLTS is selected and Select is pressed, the system enters the OLTS
measurement mode.
After entering the OLTS measurement mode, the screen shown on the next page
is displayed.
5-3
Operation (OLTS Measurement)
5.2
Section 5 Operation (OLTS Measurement)
Setting the OLTS measurement
When moving from the OTDR measurement to the OLTS measurement, the following screen is displayed:
When the optional Optical Power Meter is not mounted, the screen is displayed to
enable light source function operations only. MW9076B1 disables the transition
to the OLTS measurement when the optical power meter is not mounted.
Wavelength
Switch the wavelength of the light source and optical power meter. The wavelength that can be selected is determined by the mounted OTDR unit (The optical
power meter wavelength is selected when the main unit is MW9076B1 as there is
no light source function,). The light source and the optical power meter are
switched together.
Press F4 (Select λ) to switch the wavelength. Press Select or the rotary
knob with the cursor placed on "Wavelength" to display the selection dialog box
as shown below to enable selection. Use the
and
keys or the
rotary knob to move the cursor to select the wavelength and use Select to
determine the selection. In addition, when the cursor is placed on "Wavelength",
press the
and
keys to switch the wavelengths.
5-4
5.2 Setup
Modulation
Switch the modulation frequencies (CW/270 Hz/1 kHz/2 kHz) of the light source
and optical power meter. The light source and the optical power meter are
switched together. Switching is performed by adjusting the desired frequency
using the
and
keys with the cursor placed on "Modulation". In
addition, press Select or the rotary knob with the cursor placed on "Modulation" to display the selection dialog box as shown below to enable selection. Use
the
and
keys or the rotary knob to move the cursor to select the
wavelength and use Select to determine the selection.
5
The measurement system is changed to OTDR measurement.
Channel
Set the channel number of connected optical channel selector.
The channel number that can be set is determined by the connected optical channel selector.
To set the channel, switch the channel to the desired one by pressing the
and
keys with the cursor placed on "Channel". In addition, press
Select or the rotary knob with the cursor placed on "Channel" to display the
and
selection dialog box as shown below to enable selection. Use the
keys or the rotary knob to display the channel and use Select to determine the selection.
5-5
Operation (OLTS Measurement)
System
Section 5 Operation (OLTS Measurement)
Visible LD
When the optional visible light source is mounted, OFF/ON/Blink can be set.
To set the visible light source, press Select or the rotary knob with the cursor
placed on "Visible LD" to display the selection dialog box as shown below to
enable selection. Use the
and
keys or the rotary knob to select
the desired operation and use Select to determine the selection.
Average Number
Set the average number for the optical power measurement. When the input
power fluctuates and the range is switched during the average process, the average process is reset and is executed again.
To set the average number, switch the average number to the desired one by
pressing the
and
keys with the cursor placed on "Average Number". In addition, Press Select or the rotary knob with the cursor placed on
"Average Number" to display the selection dialog box as shown below to enable
selection. Use the
and
keys or the rotary knob to change the
average number to the desired one and use Select to determine the selection.
To turn the average ON and OFF, press F4 (Average ON) after pressing
F2
(More).
Wavelength for Calibration
To calibrate the optical power meter sensitivity, set the incident light wavelength.
It can be set at the 5 nm interval. The wavelength is changed to the desired one by
and
keys with the cursor placed on "Wavelength for
using the
Cal.". In addition, press Select or the rotary knob with the cursor placed on
"Wavelength for Cal." to display the selection dialog box as shown below to enable selection. Use the
and
keys or the rotary knob to select the
desired wavelength and press Select to determine the selection.
5-6
5.2 Setup
Each wavelength can be calibrated in the following wavelength ranges:
1250 to 1350 nm, 1450 to 1650 nm
Reference Level
The reference level for the relative power measurement is set. The reference level
can be set at the 0.01 dBm units. To set the reference level, press the
and
keys to change the value to the desired one with the cursor placed on
"Reference Level". In addition, press Select or the rotary knob with the cursor placed on "Reference Level" to display the selection dialog box as shown
below to enable selection. Use the
and
keys or the rotary knob
F3 (Abs → Ref) during the measurement, the absolute value at
that time is set as the reference level.
F3 (Abs → Ref) can be selected by
using F2 (More).
By pressing
Range Hold
Switch the measurement range of the optical power meter. By setting Auto, the
range is automatically optimized for the measurement according to the input
power.
To set the range, press Select or the rotary knob when the cursor is placed on
"Range Hold" to display the selection dialog box as shown below. Use the
and
keys or the rotary knob to select the desired range and press
Select to determine it.
The following display is shown in the event of over range or under range. Check
the measurement range and perform the measurement again.
5-7
5
Operation (OLTS Measurement)
to change the value to the desired one and press Select to determine the selection.
Section 5 Operation (OLTS Measurement)
Contents of function keys
Light Source ON (F1)
By pressing F1 (Light Source ON), the light source set with "Waveform"
illuminates. To stop the illumination, press F1 (Light Source OFF) again.
Only MW9076B/C supports this function.
More (F2)
By pressing
F2 (More), the following function keys are displayed.
For details, see "5.2.1 More (OLTS)".
Light Source ON (F1)
Back (F2)
Abs → Ref (F3)
Average ON (F4)
Offset (F5)
Select CH (F3)
By pressing F3 (Select CH), the channel number of connected optical channel selector is incremented. Channel numbers that can be set are determined by
the connected optical channel selector.
Select λ (F4)
By pressing F4
(Select λ), wavelengths of the light source and the optical
power meter are switched one by one (when the main unit is MW9076B1 the
optical power meter wavelength is selected as there is no light source function,).
The wavelengths that can be selected are determined by the mounted OTDR unit.
The light source and the optical power meter are switched together.
Loss Table (F5)
The OLTS measurement loss table can be created. For details, see "5.3 Loss
Table".
5-8
5.2 Setup
More (OLTS)
By pressing F2
keys are displayed.
(More) in the OLTS measurement, the following function
Light Source ON (F1)
By pressing F1 (Light Source ON), the light source set with "waveform"
illuminates. To stop the illumination, press F1 (Light Source OFF) again.
Only MW9076B/C supports this function.
Back (F2)
Function keys that are first displayed when displaying the OLTS mode are resumed.
Absolute value → Reference value (F3)
Set the reference value for the relative power measurement. By pressing
F3
(Abs → Ref) during the OLTS measurement, the absolute value at that time is set
as the reference value.
Average ON (F4)
By pressing F4 (Average ON), the measured value is averaged by using the
number set as "Average Number". To stop the average process, press F4
(Average OFF) again.
Offset (F5)
To perform the OLTS measurement, first perform the offset adjustment of the
optical power meter. Place the dust cover on the input end of the optical power
meter to block the optical input before pressing F5 (Offset). It takes about
20 seconds for the adjustment.
5-9
5
Operation (OLTS Measurement)
5.2.1
Section 5 Operation (OLTS Measurement)
5.3
Loss Table
The loss table for OLTS measurement can be created. Display items of the table
are measurement number, wavelength (nm), channel number, reference value
(dBm), absolute value (dBm), and loss (dB). In addition, the created loss table
can be saved to the file and printed. Press F5 (Loss Table) on the OLTS
measurement table to display the screen as shown below. Press F1 (Add
Table) to add the measured result at that time to the table. In addition, comments
can be input for the result added to the table.
Function key contents
Add Table
By pressing F1 (Add Table), the measured result at that time is added to the
loss table. The procedures to insert a result in the middle of loss table already
created are as follows:
5-10
(1)
Move the cursor to the insertion position
and
keys or the rotary knob to move the cursor to
Use the
the place in the table where you want to insert the result. When you want to
insert the result between No. 5 and 6 for example, place the cursor on No. 6.
(2)
Add Table
Press F1 (Add Table) to insert the result. Since the cursor is still
placed at the insertion position, it must be moved to the place where the next
measurement result is added.
5.3 Loss Table
Delete
By pressing F2 (Delete), the function key is displayed that is used to delete
a result from the loss table.
F3
F1
Select/Cancel (F2)
Use the
and
keys or the rotary knob to move the cursor to the
result that you want to delete from the loss table. When you select it by pressing
F2 (Select/Cancel), the selected result is displayed in bold type. When you
want to cancel the selection, place the cursor there again and press F2 (Select/Cancel). Press F1 (Delete Execute) after the selection to delete the result.
Select All (F3)
To delete the entire loss table, press F3 (Select All). Press
Execute) after the selection, to delete the results.
F1
5
(Delete
Exit (F5)
The deletion is stopped.
Select CH
By pressing
F3 (Select CH), the channel number of the connected optical
channel selector is incremented. The channel numbers that can be set are deter-
mined by the connected optical channel selector.
Select λ
F4 (Select λ), wavelengths of the light source and the optical
power meter are switched one by one (The optical power meter wavelength is
selected when the main unit is MW9076B1 as there is no light source function).
By pressing
The wavelengths that can be selected are determined by the mounted OTDR unit.
The light source and the optical power meter are switched together.
5-11
Operation (OLTS Measurement)
Delete Execute (F1)
After selecting the file to be deleted by using F2 (Select/Cancel) or
(Select All), delete the required result from the loss table by pressing
(Delete Execute).
Section 5 Operation (OLTS Measurement)
Condition
By pressing
F5 (Condition), the Loss Table screen returns to the OLTS
measurement condition setting screen.
Comment input method
Comments can be input for each measured result in the loss table. Use the
and
keys or the rotary knob to select the result in the table and
press Select to open the comment input window.
Use the
and
keys to move the cursor to the place where you
want to input. Use the rotary knob to select the character you want to input.
When you complete the input, press F5 (Close). The input comment is
determined and displayed next to "Comment" on the screen.
Function key contents
Insert (F1)
After pressing
F1
character is selected.
(Insert) at the position where the cursor is placed, the
Delete (F2)
After placing the cursor on the character to be deleted,
F2
(Delete) is placed.
Paste Pre-Comment (F3)
The comment for measured result that is input immediately before is copied.
Clear (F4)
The input comment is cleared.
Close (F5)
The input is determined.
5-12
5.4 Measurement Example (Optical Loss Measurement)
Measurement Example (Optical Loss Measurement)
The method of optical loss measurement is explained below as an example of the
OLTS measurement.
The total loss of the fiber under test is measured. The optical power meter supports only the single mode fiber.
Setup
(1)
Connect the short fibers between the light source and the optical power
meter to measure the optical power at point (a) in the following figure.
(2)
Connect a short fiber between the output of the light source and one end of
the fiber or other devices under test, and then connect the other end of the
fiber under test and the input of the optical power meter with another short
fiber. Measure the optical power at point (b) as shown in the figure below.
Fiber or other devices
under test
5
(a)
Operation (OLTS Measurement)
5.4
Short fiber
(b)
MW9076B/B1/C
Output terminal of
the light source
Output of optical
power meter
Measurement procedure
(1) Close the input end of the optical power meter with the dust cover to eliminate
(2)
stray light input and to perform offset adjustment of the optical power meter.
Set the wavelength and the modulation frequency of the light source and the
optical power meter. Use the same wavelength and the same modulation
frequency for the light source and the optical power meter.
(3)
Measure the optical power level A at Point (a) by connecting Point (a) to the
input end of the optical power meter in the Setup (1) configuration.
(4)
Press
F3
(abs → Ref) when the optical power A is displayed to set the
optical power A to the reference value. The value of the optical power A is
displayed under Ref on the screen after the setting.
(5)
Measure the optical power level B at Point (b) in the Setup (2) configuration. The optical loss (A-B) of the fiber under test is displayed under Loss.
5-13
Section 5 Operation (OLTS Measurement)
Note:
Be sure to cut off the optical input and perform offset adjustment of the
optical power meter, in order to measure correctly.
Unless performing offset adjustment of the optical power meter, the
measurement result is not correct.
5-14.
Section 6 Operation (CD Measurement)
MW9076D/D1 can measure chromatic dispersion (hereafter referred to as CD) of
the optical fiber in the Full Auto mode from a single end, in addition to the OTDR
function.
6.1
6.2
Measurement Principles ................................
Outline of Chromatic Dispersion
6-2
6.3
Measurement .................................................
Measurement Procedures (Flow) ..................
6-4
6-5
Details of Measurement Procedures .............
6.4.1 From OTDR to CD ..............................
6-7
6-7
6.4.2 Setup .................................................. 6-8
6.4.3 End detection ..................................... 6-11
6.4.4 CD Measurement ............................... 6-12
6.4.5 CD Calculation ................................... 6-15
6.4.6 Manual Mode ...................................... 6-18
6.4.7 Saving and printing ............................. 6-18
6
Operation (CD Measurement)
6.4
6-1
Section 6 Operation (CD Measurement)
6.1
Measurement Principles
The following diagram shows the principles of chromatic dispersion measurement by MW9076D/D1.
Fiber to be measured
MW9076D/D1
Far end
λ1
λ1
λ2
λ2
λ3
λ3
λ4
λ4
λ1
λ2
λ3
λ4
<1> Chromatic dispersion refers to a phenomenon of different optical propagation speeds in the optical fiber caused by different wavelengths. Accordingly, optical pulses with different wavelengths are transmitted along the
optical fiber from the OTDR and the differences in arrival time of optical
pulses (Fresnel reflection) which return from the far end are measured.
λ2
λ1
∆τ
λ3
λ4
Measured value of Fresnel reflection
6-2
6.1 Measurement Principles
<2> Perform fitting using the approximate formula shown below for the measured value obtained in <1>.
Approximate formula:
a + bλ2 + cλ–2 ···Single model fiber
aλ2 + bλ + c ···Dispersion-shifted fiber
aλ4 + bλ2 + c + dλ–2 + eλ–4 ···Any (5 term Sellmeier)
λ3
λ4
λ1
6
Fitting curve
<3> Differentiating the approximation curve obtained in <2> by the wavelength
produces the chromatic dispersion value. Further differentiating the dispersion value by the wavelength produces the dispersion slope value.
Chromatic Dispersion Value curve
6-3
Operation (CD Measurement)
∆τ
λ2
Section 6 Operation (CD Measurement)
6.2
Outline of Chromatic Dispersion Measurement
The chromatic dispersion measurement is performed in the following two steps.
• Step 1 End detection
Roughly identifies the position of Fresnel reflection at the far end of the optical
fiber for the chromatic dispersion is to be measured. Performs measurement
using a single wavelength.
• Step 2 CD measurement
Performs precise measurements of the peak position of Fresnel reflection at the
far end using four wavelengths based on the position obtained from End detection. Then, it calculates chromatic dispersion, dispersion slope and delay from
the measurement results.
Measurement mode
• Full Auto mode
Performs End detection and CD measurement, respectively. This unit automatically sets the distance range, pulse width, attenuator value and other measurement conditions and performs measurements.
• Auto mode
Performs End detection and CD measurement, respectively. Operations are
performed basically in the same manner as in the Full Auto mode. However,
the measurement conditions can partly be set in the way the user chooses.
• Manual mode
Performs the CD measurement only. This mode is convenient when planning
to measure fibers of almost the same length consecutively. This mode can be
selected on the Setup Screen after measurements are performed in the Full
Auto mode or Auto mode.
6-4
6.3 Measurement Procedures (Flow)
Measurement Procedures (Flow)
User operation is indicated in boxes.
Internal processing of the equipment is indicated in brackets.
Change “System” from OTDR to CD, then select “Mode” (Full Auto or Auto),
Approximate formula (SMF, DSF or Any) and Reference wavelength (one of
the four wavelength).
Auto mode
Full Auto mode
End detection
measurement
conditions entry
Wavelength
Distance range
Pulse width
Attenuation
Average limit item
Average limit value
6
Press Start.
(Automatic fiber end detection processing)
Fiber end position
confirmation
(Marker setting - Set a marker manually when it is
found displaced or it was not automatically detected.)
End detection
Press F1 (CD Measurement).
CD measurement
(Automatically starts measurement after measuring
conditions are set.)
(The detection of the peak position of Fresnel
reflection)
The confirmation of the peak
position of Fresnel reflection
(Marker setting - Set a marker manually when it is
found displaced.)
Next page
6-5
Operation (CD Measurement)
6.3
Section 6 Operation (CD Measurement)
CD Calculation
Selection of a reference wavelength to be used for CD Calculation
Press F3 (CD Calculation) to move to the CD Calculation Setting Screen.
Press F1 (Execute).
(Delay screen indication)
Saving and printing
After pressing Menu, position the cursor on “File” and press
F1 (Save) or F3 (Print). (The operations to follow are
the same as those in the OTDR mode.)
Displaying the chromatic dispersion and dispersion slope
results
Press F4 (Dispersion) or F5 (Slope).
Continuously measuring fibers of similar lengths and types
After pressing F1 (Setup), select “Manual” in the Measurement
mode. Or, after pressing F2 (OTDR Screen), press F4 (Manual
Mode) on the OTDR Screen.
Press Start.
Start a CD measurement with the same settings.
Measuring chromatic dispersion of fibers of different
lengths and types
Press Start again to start a measurement from the beginning
(End detection).
6-6
6.4 Details of Measurement Procedures
6.4
Details of Measurement Procedures
6.4.1
From OTDR to CD
Select “System” on the Setup Screen 1 to open a window as shown in the figure
below.
Select CD to move to the chromatic dispersion (CD) measurement. A screen
appears as shown in the figure below.
<1>
<2>
<3>
<4>
6-7
Operation (CD Measurement)
6
Section 6 Operation (CD Measurement)
6.4.2
Setup
Setup 1/3 setting
First, select a measurement mode. Three measurement modes are available.
Normally, select Full Auto when you are measuring a fiber for the first time.
Next, select an approximate formula and reference wavelength. When Auto is
selected as the measurement mode, measurement parameters can also be set. See
the following section for more information on each item.
<1> Mode
The following three modes shown below are available.
Only Full Auto or Auto can be selected when you have just moved to a CD
measurement. However, note that the Manual mode can also be selected
after an End detection or a CD measurement is performed in the Full Auto
or Auto mode.
Full Auto
Performs End detection and CD measurement, respectively. This unit automatically sets the distance range, pulse width, attenuation value and other
measurement conditions and perform measurements.
Auto
Performs far end detection and CD measurement, respectively. Operations
are performed basically in the same manner as in the Full Auto mode. However, the measurement conditions can partly be set in the manner of user
choice.
Manual
Performs the CD measurement only. This mode is convenient when planning to measure fibers of almost the same length consecutively. This mode
can be selected on the Setup Screen after measurements are performed in
the Full Auto mode or Auto mode.
Changing a measurement mode to the Manual mode causes the unit to move
to a CD measurement.
6-8
6.4 Details of Measurement Procedures
<2> Approx. Formula
Select an approximate formula to perform delay calculation in CD calculation. An approximate formula can be selected from the three types listed
below depending on the type of fiber. Select SMF and DSF when you are
using a single mode fiber and a dispersion-shifted fiber, respectively. Fiveterm Sellmeier (Any) can also be selected as another option.
SMF D(λ) = a + bλ2 + cλ–2 (Sellmeier)
DSF
D(λ) = aλ2 + bλ + c (Quadric)
Any
D(λ) = aλ4 + bλ2 + c + dλ–2 + eλ–4 (Five term Sellmeier)
<3> Ref. Wavelength
Select a reference wavelength from the four wavelengths. A reference
wavelength here refers to a wavelength which is set as a reference for delay
calculation. More specifically, calculation is to be performed in such a way
that the delay equals to zero at this wavelength. In addition, the distance to
be used for calculation is determined by this wavelength. Normally, select a
wavelength where IOR of the fiber is already known.
6
There are two types of measurement parameters: End detection parameters
and CD measurement parameters. They switch between themselves depending on the state of measurement. End detection parameters are displayed in this state. They are set in the same manner as those for OTDR.
They are set entirely automatically in the Full Auto mode. The table below
shows whether each parameter can be selected or not in the Auto mode.
means that the item can be selected, while X means that the item cannot be
selected.
When the Measurement mode is in the Auto mode
Setup Item
Far end detection time
Wavelength
Distance range
Pulse width
Attenuator
— if the pulse width is fixed
— if the pulse width is set to Auto
Group index (IOR)
Average limit item
Average limit value
— if the item is “Number” or “time.”
— if the average limit value is set to Auto
Data points
Sampling resolution
6-9
Operation (CD Measurement)
<4> Measurement Parameter
Section 6 Operation (CD Measurement)
Setting on Setup 2/3
Three items shown below can be set on Setup 2/3.
Active Fiber Check
Connection check
Visible LD
Each function is the same as OTDR setting. See “3.2.2 Setup Screen 2” for
more information.
Setting on Setup 3/3
Items to be set on Setup 3/3 are also the same as OTDR setting. See “3.2.3
Setup Screen 3” for more information.
6-10
6.4 Details of Measurement Procedures
End detection
Press Start after setting on the Setup screens is completed to start End detection of the fiber to be measured. The measurement takes place by using a single
wavelength (normally, the wavelength of 1550 nm). When the measurement
ends and the far end are detected, a marker is positioned at the far end section of
the fiber and a message prompting you to check the far end is displayed. Check
that the far end position has been detected and press F1 (CD Measurement).
This starts the next CD measurement. If the detection of the far end has failed, a
message appears prompting you to manually position the marker at the far end
section. Accordingly, position the marker at the far end section and press
F1 (CD Measurement).
6
F2 (Select λ) during a measurement stops the
measurement using the wavelength measured and causes the OTDR measure-
In the Auto mode, pressing
ment using the next wavelength to be resumed. Pressing
F2 during a measurement using the wavelength of 1625 nm causes the measurement to be re-
sumed using the wavelength of 1310 nm.
CAUTION
The OTDR outputs high-power optical pulses. Please
disconnect the communication equipments from the
optical fibers before measurement in case that the optical sensor breaks.
6-11
Operation (CD Measurement)
6.4.3
Section 6 Operation (CD Measurement)
6.4.4
CD Measurement
Press F1 (CD Measurement) after the completion of End detection to start a
CD measurement. The measurement of the fresnel reflection position using four
wavelengths conducted from the far end of the fiber features a high sampling
resolution and short pulse width. (Normally, sampling resolution of 0.05 m and
pulse width of 10 ns). When the measurements of all the wavelengths come to an
end, the peak position of fresnel reflection is automatically detected and a marker
appears at the peak position. Check that an asterisk marker is located on each
Fresnel reflection. If no problems are detected when the marker is checked, press
F3
(CD Calculation) to move to CD Calculation.
Pressing F2 (Select λ) during a measurement ends averaging processing at
that wavelength and moves to the measurement using the next wavelength. When
the measurement of the fourth wavelength comes to an end, the entire measurement is completed.
If the detection of a peak position has failed, a message indicating the wavelength
at which the failure occurred is displayed then the distance of the fiber end at that
wavelength turns “Off”. In addition, if the marker is found dispositioned from the
peak position, it can be moved manually. Press Select to switch a card to a
“Marker” to move the marker by using
and
.
Enlarge the waveform as shown in the following figure and position the marker at
the center position of the pulse waveform.
Figure CD Measurement result screen
6-12
6.4 Details of Measurement Procedures
Comment to be displayed when peak position detection fails
Operation (CD Measurement)
6
Set position for the fresnel reflection peak
(When operated manually)
6-13
Section 6 Operation (CD Measurement)
Detailed explanation of the function keys
Setup (F1)
Moves the screen back to the Setup Screen.
Whether each measurement parameter can be selected or not during the CD measurement is shown below.
means that the item can be selected, while
that the item cannot be selected.
means
Auto mode
Setup Item
CD measurement time
Wavelength
Distance range
Pulse width
Attenuator
— if the pulse width is fixed
— if the pulse width is set at Auto
Group index (IOR)
Average limit unit
Average limit value
— if the unit is “frequency” or “time.”
— if the average limit value is set at Auto
Data point count mode
Sampling resolution
Manual mode
Setup Item
Wavelength
CD measurement time
Distance range
Pulse width
Attenuator
— if the pulse width is fixed
— if the pulse width is set at Auto
Group index (IOR)
Average limit unit
Average limit value
— if the unit is “frequency” or “time.”
— if the average limit value is set at Auto
Data point count mode
Sampling resolution
Select λ (F2)
Causes the marker located at the peak position of Fresnel reflection of the wavelength which comes to the next wavelength detected to move every time this key
is pressed.
CD Calculation (F3)
Moves the screen to the delay screen after the confirmation of the approximate
equation of delay arithmetic and the reference wavelength.
6-14
6.4 Details of Measurement Procedures
Manual Mode (F4)
Press this key to continuously measure fibers of similar length. Press this key to
fix the distance range and the sampling range within the value currently set during
the CD measurement. Press
Start
to start a CD measurement.
Disable Marker (F5)
Press this key to set marker Off if you do not wish to use the data on the wavelength during the CD Calculation. Press this key again to set the marker On again.
When the marker is set Off for three waveforms, movement to CD Calculation is
disabled.
Setting the marker Off first and then setting it On again enables the marker to be
automatically positioned at the peak position when you have moved the marker
from the peak position of fresnel reflection and wish to detect the peak position
again.
CD Calculation
Performs Calculation (delay, chromatic dispersion and dispersion slope) concerning chromatic dispersion based on the values obtained from the CD measurement
to display the results in the form of a graphic chart.
6
Press
Operation (CD Measurement)
6.4.5
F3 (CD Calculation) on the screen on which a CD measurement has
been completed to display the screen shown below.
Figure Dialog box promoting user confirmation of approximate
formula and reference wavelength
6-15
Section 6 Operation (CD Measurement)
Check the approximate formula and reference wavelength and press
(Execute) if no problems are found. The display screen then appears.
F1
The horizontal scale represents the wavelength on all the screens showing delay,
dispersion and slope.
Approximate formula and reference wavelength
Approximation
curve of the delay
CD Calculation
results
Figure Example of Delay indication
Press
or
, or turn the rotary knob to move the marker. This
causes the wavelength, delay, dispersion, slope, and total dispersion values to
change depending on the marker position.
Press F4 (Dispersion) or F5 (Slope) to view the waveform data of
chromatic dispersion or dispersion slope, respectively.
When the marker is set On for two wavelengths, an calculation error may occur.
(Three wavelengths for Any of the approximate formula)
The CD calculation results are displayed on all the screens showing the calculation results of the delay, dispersion and slope.
Explanation for each item is given below.
Wavelength:
The current marker position (1550.0 nm at the
Delay:
beginning)
Delay at the wavelength where the marker is
currently located.
6-16
6.4 Details of Measurement Procedures
Dispersion:
The dispersion value at the wavelength where
the marker is currently located
Slope:
The dispersion slope at the wavelength where
the marker is currently located.
Zero-dispersion wavelength: The wavelength at which the dispersion obtained from the approximate formula becomes
Total dispersion:
zero.
The dispersion value of the entire fiber at the
wavelength where the marker is currently located.
Fiber length:
The distance to the far end of the fiber to being
measured (reference value)
λ:
IOR:
Reference wavelength
The setting value of IOR of reference wavelength
Detailed explanation of the function keys
Setup (F1)
Moves the screen back to the Setup Screen.
OTDR Screen (F2)
Displays the results of chromatic dispersion calculation in the form of a graphic
chart.
Slope (F5)
Displays the results of dispersion slope calculation in the form of a graphic chart.
Additionally, the data which include “km” in the unit (delay, dispersion and
slope) are operated by using he reference wavelengths.
Figure Example of Dispersion indication
6-17
Operation (CD Measurement)
6
Moves the screen back to the CD Measurement Result Screen.
Dispersion (F4)
Section 6 Operation (CD Measurement)
Example of Slope indication
6.4.6
Manual Mode
How to shift to the manual mode
1. From the OTDR screen
Press F4 (Manual Mode) on the OTDR screen after the completion of
the CD measurement to add the indication of “(Fixed)” alongside the title of
“CD Measurement” at the top left of the screen. Press
to start the CD measurement only.
Start
in this state
2. From the Setup Screen
Press F1 (Setup) after the completion of the measurement in the Full
Auto/Auto mode to select Manual for the measurement mode. Then, “(End
Detection)” indicated alongside the measurement parameter at the bottom
changes to “(CD Measurement)”.
Press
6.4.7
Start
here to start from the CD measurement.
Saving and printing
See “Section 7 Operating the functions other than measurements” for more information on saving, reading and printing the results of CD measurements and CD
calculation.
6-18 .
Section 7 Operating the Functions Other Than Measurements
This section explains the frequently used operations other than measurements
such as printing and data saving.
in this section indicates a panel key.
7.1
7.2
Print ...............................................................
7.1.1 Printing ...............................................
7-2
7-2
7.1.2 Continuous Printing ............................
File Operation ................................................
7-6
7-8
7.2.1 Save ................................................... 7-8
7.2.2 Recall ................................................. 7-15
7.2.3 Delete ................................................. 7-19
7.2.4 Initialize (Format) ................................ 7-22
7.2.5 Copy ................................................... 7-23
Auto Increment Function ............................... 7-25
7
Operating the Functions Other Than Measurements
7.3
7-1
Section 7 Operating the Functions Other Than Measurements
7.1
Print
7.1.1
Printing
This section explains the printing operation using a printer connected to the parallel interface of the OTDR.
This explanation is based on the assumption that the printer is connected and has
been specified.
For the printer connection, refer to “Section 2.8.4 Connecting a printer.”
For the specification of the printer, refer to “Section 3.3.2 Setting the printer.”
See “Appendix G List of Recommended Printers” for more information on the
types of printers available.
The OTDR can print the wavelength data and measurement results, measurement
results only, or the settings on the Setup screen. In addition, the reference waveform can be printed in the waveform comparison mode. The following printing
example shows the printout of the waveform data and measurement results. Refer
“3.4.3 Print the Settings” to see the print of the Setup screen.
Note:
If an error occurs during printing, turn off the power of the printer,
eliminate the trouble, and then turn on the power of the printer again.
Click the
F2
(Delete) key on the printer setting screen to clear the
internal buffer if printing continues because the data to be printed is not
cleared from the equipment buffer.
7-2
7.1 Print
The printing procedure is described below.
Press Menu
after the measurement has been completed, the following menu
window opens.
When
F3
(Print) is pressed, the print setting screen is displayed. (See the
figure below.)
Operating the Functions Other Than Measurements
7
7-3
Section 7 Operating the Functions Other Than Measurements
Place the cursor on the desired item with the
and
keys or the
rotary knob, and then enter the selected item with Select or the
and
keys.
The following items can be set on the print setting screen.
Format
(Print Format)
Select the data to be printed.
When Format is selected, the following window is opened.
Place the cursor on the format to be set using the
and
keys.
Waveform & Data
Both waveform data and measurement result are printed.
Data
Only the measurement result is printed.
Setup
The settings on the Setup screen are printed.
Waveform, data and reference
Waveform, Data and Reference Waveform
In the waveform comparison mode for MW9076, the current waveform and reference waveform data are printed. When this item is specified at normal OTDR or
CD measuring, the same contents as when “Waveform and Data” is set are
printed.
After the cursor is positioned on the desired option, press Select to enter the
option.
7-4
7.1 Print
Header
(Header On/Off)
Set whether to print the entered header.
When Header is selected, the following window is opened.
Place the cursor on the option to be set using the
and
keys.
On
The entered header is printed.
Off
The entered header is not printed.
After the cursor is put on the desired option, press Select to enter the option.
Event Comment
(Event Comment On/Off)
Set whether to print the entered event comment.
Set in the same way as Header.
On
The entered event comment is printed.
Off
The entered event comment is not printed.
The title entered here is printed.
Refer “3.2.3 Setup screen 3” how to input the title.
Header
The items on the left are the contents of the header. Enter the characters for the
required items. Refer “3.2.3 Setup screen 3” how to input the each item.
Data Flag
Operator
Owner
Customer
Org Location
Term Location
Cable ID
Fiber ID
Cable Code
Comment
The characters described here are printed only when Header is set to ON. The
characters cannot be printed simply by inputting them.
Press F1 (Print Execute) after the setting and entry of each item are completed. Printing is started from the connected printer.
Note:
1. The key input will not be accepted, when the printing starts and
while the message that shows the printing is in progress is displayed.
2. Full View Window cannot be printed.
7-5
Operating the Functions Other Than Measurements
7
Title
Section 7 Operating the Functions Other Than Measurements
7.1.2
Continuous Printing
Outputs waveform data sequentially to the printer. Printing set up for each file is
not required.
For Continuous printing, file reading and printing are automatically repeated.
The current waveform display is therefore lost. Execute “File write” to save a file
beforehand, if required.
In the OTDR mode for MW9076, press Menu
on the measurement comple-
tion screen to open the menu window. Selecting “File” using
displays “Continuous Print” in the F4 function key label. Press
and
F4
(Continuous Print) to display the file selection screen shown below.
Select the file to be printed. File selection is the same as in copying and deletion.
See section 7.2.3 “Delete” for details.
F1 (Print Execute) to set the print
details. Setting printing contents is the same as ordinal printing. See section 7.1.1
“Printing” for details.
After selecting the file to be printed, press
7-6
7.1 Print
After setting print details, press
F1
(Print Execute) again to start sequential
printing.
*
Some files saved in the analysis format do not have waveform data. Such
files are not printed.
*
CD measurement files are not printed.
Operating the Functions Other Than Measurements
7
7-7
Section 7 Operating the Functions Other Than Measurements
7.2
File Operation
The OTDR can save the wavelength data to a file, recall the wavelength data from
a file, delete a file, initialize the media, and copy a file.
File operation can be performed for internal memory, memory cards, and floppy
disks.
Note:
Once a file is deleted, the file cannot be restored. Sufficient care should
be exercised in file operation.
7.2.1
Save
This section explains the method of saving a file to the specified media.
The following file is opened when Menu
is pressed in the measurement end
screen.
Select File with the
When
7-8
F1
and
keys or the rotary knob.
(Save) is pressed, the screen shown on the next page is displayed.
7.2 File Operation
Place the cursor on the desired item with the
and
rotary knob, and then select the item with Select or the
keys or the
and
keys.
It is necessary to set the following items on the print setting screen for saving the data.
The following window is opened when File Type is selected.
However, note that CD, CSV is displayed in the CD, OLTS mode and selection is
disabled in this case.
Place the cursor on the file type with the
and
keys.
Standard
Data can be saved in a format that conforms with to Bellcore GR-196-CORE
(Issue 1, Revision 1, December 1997). The extension is .SOR.
Standard.V2
Data can be saved in a format that conforms with to Telcordia Technologies SR4731 (Issue 1, February 2000). The extension is “.SOR”.
Analysis
This is the format for analyzing the waveform, and it is the special format of this
equipment. The extension is .dat.
7-9
7
Operating the Functions Other Than Measurements
File Type
Section 7 Operating the Functions Other Than Measurements
CD
This type is for chromatic dispersion measurement. The extension is .cdm.
CSV
This format is for the OLTS measurement Loss Table. The extension is .csv.
After the cursor is placed on the desired format, enter the format by pressing
Select .
CAUTION
The files saved in the standard format cannot always
record all the information displayed at OTDR.
The value of dB/km after reading out a file may be different from the value before saving the file as an error
in IOR conversion may occur because of the difference
in recording forms.
File Compression
When file compression is turned ON, the waveform data can be compressed and
stored to reduce file size.
Compressed and stored file names are displayed in the file list as follows:
filename.zip (← compressed file name)
+filename.dat (← uncompressed file name)
Data are read in the same manner when the file compression is OFF.
Media
The following window is displayed when Media is selected.
Place the cursor on the desired media with the
and
keys.
FD
Data is saved in a floppy disk.
INT Memory
Data is saved in internal memory.
PCMCIA Drv1
Data is saved in Drive 1 of the memory card.
PCMCIA Drv2
Data is saved in Drive 2 of the memory card.
After the cursor is placed on the desired media, enter the format by pressing
Select .
The number displayed in the right of Media is the memory capacity (remaining
capacity/all capacity).
The capacity is displayed in unit of 1k byte, and the capacity less than 1k byte is
displayed as 0.
7-10
7.2 File Operation
Number of files able to be
saved
The following tables indicate the number of waveforms that can be recorded.
Please note that the file capacity varies to a certain extent by the version of the
built-in program or the display area.
OTDR
Media
Standard format
123
Analysis format
67
PC-ATA card (32 MB)
PC-ATA card (256 MB)
2700
16000
1520
10600
Built-in memory (18 MB)
Number of data points: 5001
1560
860
FDD
CD
Media
CD format
85
PC-ATA card (32 MB)
PC-ATA card (256 MB)
1800
10600
FDD
Built-in memory (18 MB)
1060
When measuring a 50 km, SM fiber, in the Full Auto mode
When Directory is selected, the following directory selection screen is displayed.
7
Operating the Functions Other Than Measurements
Directory
7-11
Section 7 Operating the Functions Other Than Measurements
Select the directory to save data with the
,
and
keys. When the
or Select keys are pressed, the selected directory is dis-
played. At this time the display at Directory is changed to the selected directory
name.
To return to its parent directory, place the cursor on [..], and press the
,
or Select keys.
A new directory can be created on the directory selection screen. Follow the
procedure below for creating a new directory.
(1)
Press
(2)
The following directory name setting window is opened.
(3)
Using the
(4)
which the characters are to be entered.
Select the characters to be entered with the rotary knob. The characters
F1
(Create Directory).
and
keys, move the cursor to the position in
selected with the rotary knob are displayed at the cursor. Up to eight characters can be entered as the directory name.
(5)
Press
(6)
A new directory is created.
F5
(Close) after the directory name has been entered.
Note:
A directory is always created once the directory name setting window is
selected. Do not select Create Directory if you do not want to create a
directory.
7-12
7.2 File Operation
File name
The following window is opened when File Name is selected.
Using the
and
keys, move the cursor to the position in which the
characters are to be entered.
Select the characters to be entered with the rotary knob. File name can be expressed up to 32 characters.
The function keys that can be used in the file name input window are explained
below.
Insert (F1)
Inserts a character before the cursor.
F2
Delete (F2)
Deletes the character under the cursor.
F3
7
Increment (F3)
F4
Sets the character under the cursor to auto increment.
See “7.3 Auto Increment Function” for more information.
F5
Clear (F4)
Clear the file name.
Close (F5)
Closes the file name setting window.
Click the
F1
(Save Execute) key after the settings and input of all the items
have been completed.
This starts the saving of the file.
7-13
Operating the Functions Other Than Measurements
F1
Section 7 Operating the Functions Other Than Measurements
CAUTION
1.
The File Access Mark is displayed on the top righthand side of the screen while the file is being
saved. Do not remove the media while the File
File Access Mark
Access Mark is displayed. The data may be destroyed or the media may be damaged.
2.
The system may take about 30 seconds to store a
large data file in a floppy disk.
3.
When multiple wavelengths are specified, the
measured waveform cannot be saved in the standard / standard.V2 format without trace data for all
of the wavelengths.
4.
Only capital letters can be used for the filename. A
file whose filename is in lowercase letters is overwritten if a file is saved with the same name in
capital letters.
5.
When a file is copied, a file whose name is in lowercase letters is overwritten as mentioned in item
4 above.
7-14
7.2 File Operation
Recall
This section explains the method of recalling the file saved in the specified media.
The following file is opened when Menu
is pressed in the measurement end
screen.
Select File with the
and
The following screen is displayed when
7
keys or the rotary knob.
F2
(Recall) is pressed.
Only the names of files enabled to be read in the OTDR, OLTS or CD mode are
displayed. (The extension is SOR and DAT for OTDR, CSV for OLTS, and CD1
to 4 or CDM for CD.)
7-15
Operating the Functions Other Than Measurements
7.2.2
Section 7 Operating the Functions Other Than Measurements
The number displayed in the right of Media is the capacity (remaining capacity/
all capacity) of the objective Media.
The capacity is displayed in unit of 1k byte, and the capacity less than 1k byte is
displayed as 0.
The function key labels shown on the next page are displayed when
F4
(Media) is pressed. Select the media in which the file to be recalled is stored with
the function keys.
FD (F1)
F1
The floppy disk is selected.
F2
INT Memory (F2)
The internal memory is selected.
F3
PCMCIA Drv1 (F3)
Drive 1 (at the slot on the front side) is selected.
F4
PCMCIA Drv2 (F4)
Drive 2 (at the slot on the rear side) is selected.
F5
Exit (F5)
Media selection is suspended.
Function key selection is not necessary to recall a media set in advance (one that
is displayed on the screen).
When media is selected, the file names or directories stored in the media are displayed.
and
Put the cursor on the file name to be recalled with the
keys
or the rotary knob.
After the cursor is placed on the desired file name, press
F1
(Recall Ex-
ecute). The recalling operation starts.
and
After moving the cursor to a directory using the
keys or the
rotary knob, it is possible to enter the directory by pressing the
and
keys or Select .
Click the
F1
(Recall Execute) key after the settings and input of all the items
have been completed.
The file recall is started.
When a file is read or selected (used for copy or deletion), the cursor automatically moves either one line up or down in the direction of the movement immediately before.
In addition, when the horizontal direction
and
of the cross key
are pressed at a place other than the directory name on the file selection screen,
the page is scrolled up and down a half page (five lines) size, respectively.
7-16
7.2 File Operation
CAUTION
1.
The file access mark is displayed at the upper
right of the screen while reading a file. Do not remove the media while the File Access Mark is displayed. The data may be destroyed or the media
may be damaged.
2.
The system may take about 30 seconds to recall a
large data file in a floppy disk.
3.
The stored files or the measurement conditions of
the MW9076 can be recalled or changed, respectively, if the name of the OTDR to be recalled
matches with that of the stored OTDR. However, if
the names do not match, the OTDR can be recalled
but the status is converted to the emulation mode
which cannot be changed using the measurement
conditions in the Setup (1/3) screen. To cancel the
emulation mode, click the F1 (Emulation Off) key
on the Setup screen. The optimum measurement
conditions for the equipment are set again. However, the displayed waveform is deleted.
Example:
Save
Media
Recall OK
Recall OK
However, this is the emulation mode.
7
MW9076B
Operating the Functions Other Than Measurements
MW9076B
other than
MW9076B
7-17
Section 7 Operating the Functions Other Than Measurements
CAUTION
4.
Analysis and standard format files of firmware version 3.0 and higher can be recalled, but the status
changes to the emulation mode. Waveforms in
print format cannot be recalled. In addition, file
with firmware versions earlier than V3.0 may not
work properly. Files saved in the MX3607B with
version earlier than V3.0 may not work properly.
Example:
MW9070B
or
Save
Analysis format
MX3607B
Standard format
Print format
Text format (only
Recall OK
Recall OK
MW9076B∗
Emulation mode
Recall NG
Recall NG
in MX3607B)
5.
MW9076B∗
Emulation mode
MW9076B∗
MW9076B∗
Among the recalled files, only the analysis format
and Standard format files measured using
MW9076 Series and the analysis format files measured using MW9070B can be used the eventpoint detection with re-auto search. Standard format files which are measured using OTDRs produced by other companies cannot be used for
event-point detection even if auto search is performed.
6.
The files saved in the standard format cannot always record all the information displayed at
OTDR.
The value of dB/km after reading out a file may be
different from the value before saving the file as an
error in IOR conversion may occur because of the
difference in recording forms.
The amount of reflection is not recorded in a standard format file recorded in other than MW9076
Series. Therefore, the amount of reflection is displayed as ***.*** when the file is read out.
7-18
7.2 File Operation
CAUTION
7.
8.
Delete
This section explains the method of deleting the file saved in the specified media.
The following window is opened when Menu
is pressed on the measurement
end screen.
7
F1
Select File with the
and
F2
pressed.
F3
The deletion screen is displayed when
keys or the rotary knob.
The following function key labels are displayed when
F2
F5
(File Utility) is
is pressed.
See the next page for the deletion screen.
F4
F5
7-19
Operating the Functions Other Than Measurements
7.2.3
The extension of the chromatic dispersion measurement data file of software version less than
1.3, is anyone of .CD1 to .CD4. It is .CDM for the
software version 2.0 or more.
The software version 2.0 or more can read the files
with the extension .CD1 to .CD4. When the file with
the extension .CD1 to .CD4 is saved by the software version 2.0 or more, the saved file extension
is changed to .CDM.
A data file saved in the OLTS mode is in a text format. It can be edited with PC but cannot be read
by this device once it is edited.
Section 7 Operating the Functions Other Than Measurements
Use the
and
keys or the rotary knob to place the cursor on the
file name you want to delete.
When you select the file name by pressing F3 (Select/Cancel), the selected
file name is displayed in bold type. When you want to cancel the selection, place
the cursor on it and press F3 (Select/Cancel).
When you press F1 (Delete Execute) after the selection, a confirmation
message is displayed. Press F1 (Yes) again to start the deletion. To stop the
deletion halfway, press F5 (Delete Stop).
CAUTION
The deleted file cannot be recovered. Be careful when
deleting a file or a directory.
When a directory is selected, all files in the directory
are deleted.
Function key contents
Delete Execute (F1)
After selecting the file to be deleted, press
More (F2)
By pressing
F2
F1
(Delete Execute).
(More), the following function keys are displayed:
Sort (F1)
F1 (Sort) can be pressed to arrange the displayed file names in the specified item order. Items that can be used to sort are File Name, Size, Date and
their ascending and descending orders.
7-20
7.2 File Operation
Back (F2)
Pressing F2
(Back) resumes the Delete function key.
Select All (F3)
Pressing
Media (F4)
After pressing
F3
(Select All) selects all the displayed files.
F4
(Media), change the media to one that stores files to de-
lete.
Exit (F5)
The deletion is stopped.
Operating the Functions Other Than Measurements
7
7-21
Section 7 Operating the Functions Other Than Measurements
7.2.4
Initialize (Format)
This section explains the method of initializing (formatting) the specified media
so that it can be used in the OTDR.
First, select File Utility by pressing Menu . Refer to “Section 7.2.3 Delete”
for the method of setting File Utility.
F1
The function key labels shown on the left are displayed when File Utility is selected.
F2
The format screen is displayed when
F3
F4
(Format) is pressed in this state.
The format screen is shown below.
F4
F5
Place the cursor on the media to be initialized with the
and
or the rotary knob.
Initialization is started when
F1
(Format Execute) is pressed.
CAUTION
When initialization is performed, all the stored files are
deleted and the deleted files cannot be restored. Take
sufficient care in initializing the media.
7-22
keys
7.2 File Operation
Copy
The method to copy the specified file is explained.
Select [F5] (File Utility) from Menu . For the utility selection method , see
F1
"7.2.3 Delete".
F2
When File Utility is selected, function key labels shown on the left are displayed.
F3
Press
F1
(Copy) to display the following copy screen:
F4
F5
7
Specify the file to be copied on this screen.
Use the
and
keys or the rotary knob to place the cursor on the
file or the directory to be copied.
When you select it by pressing F2 (Select/Cancel), the selected file name is
displayed in bold type. When you want to cancel the selection, place the cursor
there again and press F2 (Select/Cancel). The total size of selected files is
displayed under the function key. When you specified a directory, the directory
content is not included in the total size.
7-23
Operating the Functions Other Than Measurements
7.2.5
Section 7 Operating the Functions Other Than Measurements
Continue on to select the copy target.
Pressing F1 (Copy Target) determines the copy source file and the displayed screen color becomes darker than that of the previous copy screen.
Select the media of copy target by using
by using the
,
,
F4
and
(Media) and select the directory
keys.
Press
F1 (Copy Execute) to display the confirmation message. Press
F1 (Yes) again to start the copy.
To stop the copy halfway, press F5 (Copy Stop).
When there is a file with the same name at the copy target, the message is displayed that asks whether you want to overwrite it. Select either
F2 (No), F3 (Overwrite All), or F5 (Copy Stop).
For an explanation of
7-24
F2
F1
(Yes),
(More) of function keys, see "7.2.3 Delete".
7.3 Auto Increment Function
Auto Increment Function
As shown below, each time a waveform is saved, this function automatically increments the number by 1. This function is useful for repeated measurements and
data saving such as the measurement on a multi-core fiber.
The auto increment can be set from the file name input window or title input
window.
Title
Atsugi-Ebisu-0324
File name: SMF-001
FD
Atsugi-Ebisu-0325
File name: SMF-002
FD
Atsugi-Ebisu-0326
File name: SMF-003
FD
Atsugi-Ebisu-0327
File name: SMF-004
FD
Atsugi-Ebisu-0328
Follow the procedure below to set the digits of auto increment.
Display the title or file name input window for inputting the alphanumeric characters.
In this input window, position the cursor on the numeric characters to be autoincremented.
Title input window
Move the cursor on the numeric characters to be auto-incremented.
When F3 (Increment) is pressed in this state, the background of the numeric
characters changes to green. Auto-increment is set at the colored position.
7-25
7
Operating the Functions Other Than Measurements
7.3
Section 7 Operating the Functions Other Than Measurements
Increment setting
In the above example, the three numeric characters “007” are incremented.
When the cursor is placed on the numeric characters for which auto-increment is
set and
F3
is pressed, the auto-increment setting is canceled.
File name input window
Auto-increment can be set in the same way as the title input window. Only the
displays are shown below.
Before the setting
After the setting
Increment setting
7-26
7.3 Auto Increment Function
Only numeric characters can be set using the auto-increment function. Up to four
numeric characters can be set.
When the increment step is 1, the numbers are incremented as shown below.
1 digit:
8→
9→
0
2 digits:
3 digits:
98 →
998 →
99 →
999 →
00
000
4 digits:
9998 →
9999 →
0000
Setting the increment step
The number of increment steps for the auto-increment function can be set.
Set the number of steps in accordance with the procedure below.
Open the file name input window. Refer to “Section 7.2.1 Save” for the method
of opening the file name input window.
Press
.
The cursor is moved to Increment Step.
Set the number of increment steps with the
and
keys. The value
can be set between +10 and –10.
The number is not incremented but decremented when a negative value is set. In
the case of decrement, the number decrements only down to zero.
7-27
Operating the Functions Other Than Measurements
7
Section 7 Operating the Functions Other Than Measurements
7-28.
Section 8 Performance Test and Calibration
This section explains how to check the performance of the OTDR and how to
calibrate the measured values.
Contact Anritsu Corporation or your nearest service representative if the performance test described in this section reveals that the system does not conform to
specifications.
Provide the following data in advance when requesting repairs.
(1)
Model name, and instrument serial number affixed at the bottom of the machine.
(2)
(3)
Failure details
Name and telephone number of the person in charge whom Anritsu can
contact for the detail of the failure or report the completion of repair.
8.1
Performance Test ..........................................
8-2
8.1.1 Wavelength ........................................
8.1.2 Pulse width .........................................
8-8
8-9
8.1.3 Dynamic range (one-way backscattered light dynamic range test) .... 8-10
8.1.4 Horizontal axis accuracy .................... 8-11
8.1.5 Vertical axis accuracy ......................... 8-12
8.1.6 Optical power level and
wavelength of visible LD ..................... 8-13
8.1.7 Optical output level and
wavelength of the light source ............ 8-14
8
8.1.8 Measurement range and
accuracy of the power meter
Performance Test and Calibration
(options 02 and 03) ............................ 8-15
8.1.9 Chromatic dispersion value
(MW9076D/D1) .................................. 8-17
8.1.10 Insertion loss of the optical
8.2
channel selector (MU960001A/2A) .... 8-18
Calibration ..................................................... 8-19
8.3
Performance Test Result Record Form ......... 8-20
WARNING
NEVER look directly into the optical output connector
of the OTDR or into the end of an optical cable connected to the OTDR as the laser light can injure your
eyes.
Procedures other than those specified herein may result in hazardous radiation exposure.
8-1
Section 8 Performance Test and Calibration
8.1
Performance Test
The following ten items should be tested to check the performance of the OTDR.
(Items 6 and 8 can be tested only when option 01, 02, or 03 is installed.) Item 7
can be tested when MW9076B/C is used.
Item 9 will be tested when MW9076D/D1 is installed. Item 10 will be tested
when MU960001A/2A is installed.
(1)
(2)
Wavelength
Pulse width
(3)
(4)
Dynamic range
Horizontal axis accuracy
(5)
(6)
Vertical axis accuracy
Optical power output and wavelength of the visible LD (option 01)
(7)
(8)
Optical output level and wavelength of the light source
Measurement range and accuracy of the power meter (option 02 or 03)
(9) Wavelength deviation value
(10) Insertion loss for optical channel selector
Clean the optical connector before performing the test. The test procedure described here assumes that the power switch is turned on and the power lamp is lit.
(The description in Section 8.1.1 assumes that the power is turned off.)
Standard values of test items
The following standard values are guaranteed at a temperature of 25 ± 5 ˚C.
1.
When the MW9076B OTDR main unit is installed
Item
Center wavelength
Standard value
Remarks
1310/1550 ± 25 nm
Pulse width:
1 µs
Pulse width (ns)
10
Dynamic range
8.9/
20
50
100
500
1000 2000 4000 10000 20000
10.9/ 12.9/ 14.4/ 22.4/ 24.4/ 25.9/ 29.9/
(dB)
6.9
Horizontal axis
±1 m ± 3 × measured distance × 10–5 ± marker resolution
8.9
10.9
12.4
20.4
22.4
23.9
27.9
37.4/
39.9/
35.4
37.9
accuracy
Vertical axis
±0.05 dB/dB or ±0.1 dB (whichever is greater)
accuracy (linearity)
Light source
Function
8-2
Optical output power
–3 ± 1.5 dBm
CW
Center wavelength
1310/1550 ± 25 nm
CW
Spectral width
5/10 nm or less
CW
8.1 Performance Test
2.
When the MW9076B1 OTDR main unit is installed
Item
Center wavelength
Standard value
Remarks
1310/1550 ± 25 nm
Pulse width:
1 µs
Pulse width (ns)
10
20
50
100
500
1000 2000 4000 10000 20000
Dynamic range
8.9/
(dB)
6.9
Horizontal axis
±1 m ± 3 × measured distance × 10 ± marker resolution
10.9/ 12.9/ 14.4/ 22.4/ 24.4/ 25.9/ 29.9/
8.9
10.9
12.4
20.4
22.4
23.9
27.9
33.9/ 35.4/
31.9
33.4
–5
accuracy
Vertical axis
±0.05 dB/dB or ±0.1 dB (whichever is greater)
accuracy (linearity)
3.
When the MW9076C OTDR main unit is installed
Item
Center wavelength
Standard value
Remarks
1310/1550 /1625 ± 25 nm
Pulse width:
1 µs
Pulse width (ns)
10
Dynamic range
8.9/
10.9/ 12.9/ 14.4/ 22.4/ 24.4/ 25.9/ 29.9/
36.4/ 38.9/
(dB)
6.9/
8.9/
34.4/ 36.9/
4.4
6.4
Horizontal axis
20
50
100
500
1000 2000 4000 10000 20000
10.9/ 12.4/ 20.4/ 22.4/ 23.9/ 27.9/
8.4
9.9
17.9
19.9
21.4
25.4
31.9
34.4
−5
±0.1 m ± 3 × measured distance × 10 ± marker resolution
accuracy
Vertical axis
±0.05 dB/dB or ±0.1 dB (whichever is greater)
accuracy (linearity)
8
Light source
Optical output power
−3 ± 1.5 dBm
CW
Center wavelength
1310/1550/1625 ± 25 nm
CW
Spectral width
5/10/10 nm or less
CW
Performance Test and Calibration
Function
8-3
Section 8 Performance Test and Calibration
4.
When the MW9076D OTDR main unit is installed
Item
Center wavelength
Standard value
Remarks
1310/1410 /1550/1625 ± 3 nm
Pulse width:
Spectrum width ≤1 nm
1 µs
1000 2000 4000 10000 20000
Pulse width (ns)
10
20
50
100
500
Dynamic range
—
3.9/
5.9/
7.4/
15.4/ 17.4/ 18.9/ 22.9/
29.4/ 31.9/
2.9/
4.9/
6.4/
14.4/ 16.4/ 17.9/ 21.9/
28.4/ 30.9/
—
3.9/
5.4/
13.4/ 15.4/ 16.9/ 20.9/
27.4/ 29.9/
—
2.9
10.9
(dB)
Horizontal axis
12.9
±0.1 m ± 3 × measured distance × 10
—5
14.4
18.4
24.9
27.4
± marker resolution
accuracy
Vertical axis
±0.05 dB/dB or ±0.1 dB (whichever is greater)
accuracy (linearity)
Chromatic Dispension
±0.05 ps/(nm.km) (Typical value)
Wavelength: 1.55 µm
measurement Function
Fiber: 25 km
Dispersion
Repeatability
5.
When MW9076D1 OTDR main unit is installed
Item
Center wavelength
Standard value
Remarks
1310/1450 /1550/1625 ± 3 nm
Pulse width:
Spectrum width ≤1 nm
1 µs
1000 2000 4000 10000 20000
Pulse width (ns)
10
20
50
100
500
Dynamic range
−
3.9/
5.9/
7.4/
15.4/ 17.4/ 18.9/ 22.9/ 29.4/
31.9/
2.9/
4.9/
6.4/
14.4/ 16.4/ 17.9/ 21.9/ 28.4/
30.9/
−
3.9/
5.4/
13.4/ 15.4/ 16.9/ 20.9/ 27.4/
29.9/
−
2.9
10.9
(dB)
Horizontal axis
12.9
14.4
18.4
24.9
27.4
±0.1 m ± 3 × measured distance × 10−5 ± marker resolution
accuracy
Vertical axis
±0.05 dB/dB or ±0.1 dB (whichever is greater)
accuracy (linearity)
Chromatic Dispension
measurement Function
Dispersion
Repeatability
8-4
± 0.05 ps/(nm.km) (Typical value)
Wavelength: 1.55 µm
Fiber: 25 km
8.1 Performance Test
6.
When MW9076J OTDR is installed
Item
Center wavelength
Standard value
Remarks
850 ± 30 nm
Pulse width:
100 ns
Pulse width (ns)
10
20
50
100
Dynamic range
11.3
13.3
15.3
18.4
(dB)
Horizontal axis
±1 m ± 3 × measured distance × 10−5 ± marker resolution
accuracy
Vertical axis
±0.05 dB/dB or ±0.1 dB (whichever is greater)
accuracy (linearity)
7.
When MW9076K OTDR main unit is installed
Item
Center wavelength
Standard value
Remarks
850/1300 ± 30 nm
Pulse width:
100 ns
Pulse width (ns)
10
20
50
100
500
1000
Dynamic range
11.3/
13.3/
15.3/
18.4/
–/
–/
10.3
12.3
14.3
15.8
19.3
22.4
(dB)
Horizontal axis
±1 m ± 3 × measured distance × 10−5 ± marker resolution
accuracy
Vertical axis
±0.05 dB/dB or ±0.1 dB (whichever is greater)
accuracy (linearity)
When the visible LD option is installed (MW9076B/B1/C/D/D1/J/K-01)
Item
Standard value
Center wavelength
635 ± 15 nm
Optical output power
–3 ± 1.5 dBm
9.
Remarks
When the optical power meter option is installed (MW9076B/B1/C-02, -03)
Item
Measurement range
Standard value
Remarks
Option 02
+3 dBm to –70 dBm (CW light)
+0 dBm to –75 dBm (Modulation light)
Option 03
+23 dBm to –50 dBm (CW light)
+20 dBm to –55 dBm (Modulation light)
Accuracy
Option 02
±5 % (–10 dBm, 1.31/1.55 µm CW light)
Option 03
±5 % (–10 dBm, 1.31/1.55 µm CW light)
8-5
8
Performance Test and Calibration
8.
Section 8 Performance Test and Calibration
10. When an optical channel selector (MU960001A/2A) is installed
Model
Item
Insertion loss
Standard value
MU960001A
2.5 dB or less
MU960002A
4.5 dB or less
Remarks
1.31/1.55 µm, CW
Measuring Instruments and Optical Fibers Required in the Performance Test (for SM unit)
Test item
Wavelength Pulse Width
OTDR Output,
Measuring Instrument and Light Source
Output, Option
Cable
01
Dynamic
Range
Hor. Axis
Accuracy
V. Axis
Accuracy
Light Source
Output Level
Power Meter
Light Source Measurement
Output,
Range
Option 01
Chromatic
Dispersion
Accuracy
Optical Spectrum Analyzer
MS9710B
Wavelength: 0.6 to 1.75 µm
Level: –65 to +20 dBm
Optical Variable Attenuator
MN9610B
Wavelength: 1.31/1.55 µm
Attenuation: 60 dB or more
Optical Variable Attenuator
MN9002A
Wavelength: 1.31/1.55 µm
Attenuation: 60 dB or more
Waveform Monitor
MP9655A
Wavelength: 1.2 to 1.6 µm
Rise/Fall: 500 ps or less
Oscilloscope
DC 200 MHz
SM Optical Fiber (25 km)
SM Optical Fiber (75 km)
SM Optical Fiber (2 km)
SM Optical Fiber (2 m)
Optical Power Meter
ML9001A+MA9001B+
MA9411A
Wavelength: 0.38 to 1.15 µm
Level: –70 to 7 dBm
LD Light Source
MG9001A + MG0930C
Wavelength: 1.31/1.55 µm
Standard Optical Power
Meter ML9050A
Function Generator
Frequency: 100 Hz to 5 kHz
Output Level: 16 Vp-p or more
Waveform: Square Wave
∗1 Use an optical fiber of known Chromatic Dispersion value (1.3 µm, 0-dispersion wavelength).
8-6
*1
Insertion
loss
8.1 Performance Test
Measuring Instruments and Optical Fibers Required in the Performance Test (for GI unit)
Test item
Wavelength
Measuring Instrument and Cable
OTDR Output,
Option 01
Dynamic
Range
Hor. Axis
Accuracy
V. Axis
Accuracy
Light Source
Output Level
Option 01
Optical Spectrum Analyzer MS9710B
Wavelength: 0.6 to 1.75 µm
Level: –65 to +20 dBm
GI Optical Fiber (62.5/125 µm) (8 km)
GI Optical Fiber (62.5/125 µm) (4 km)
GI Optical Fiber (62.5/125 µm) (2 m)
SM Optical Fiber (2 m)
Optical Power Meter
ML9001A+MA9001B+MA9411A
Wavelength: 0.38 to 1.15 µm
Level: –70 to 7 dBm
Programable Optical Attenuator
MN938A
Wavelength: 0.85 to 1.3 µm
Attenuation: 60 dB or more
Performance Test and Calibration
8
8-7
Section 8 Performance Test and Calibration
8.1.1
Wavelength
This test measures the center wavelength of the laser output light and checks that
it meets the specification.
Setup
Connect the units as shown in the figure below.
MW9076 Series
Optical Spectrum Analyzer
Optical fiber
Test procedure
(1) On the Setup screen, set the wavelength at which a measurement is to be
(2)
performed.
For the SM unit, set the distance range to 50 km and the pulse width to 1000
ns while setting the distance range to 10 km and pulse width to 100 ns for the
GI unit, and then close the setup screen.
(3)
Press Menu and then F5 (Selftest) under Configuration to open
the Selftest screen, and then press F2 (NILE Mode On) for continuously outputting optical pulses. The laser output can be stopped by pressing
F3 (NILE Mode Off).
(4)
Input the laser light into the optical spectrum analyzer and adjust its measurement level and wavelength resolution.
(5)
(6)
Select the RMS method on the optical spectrum analyzer.
Check that the measurement result is within standard values.
(7)
To perform measurements at other wavelengths, press F3 (NILE
Mode Off) to return to Setup Screen 1, change the wavelength, and repeat
the procedure from step 3 onwards. To stop the measurement, press
F3 (NILE Mode Off) to stop the continuous output of optical pulses.
8-8
8.1 Performance Test
Pulse width
This test measures the pulse width of the outputted laser and checks that it conforms to the specifications.
Setup
Connect the units as shown in the figure below.
MW9076 Series
Variable Optical
Attenuator
Optical fiber
Waveform
Monitor
Oscilloscope
Optical fiber
Test procedure
(1) Set the pulse width to be measured on Setup screen 1. Check the wavelength and set it to a new value if necessary.
(2)
Press
(3)
Adjust the oscilloscope amplitude and time axis scale and display the wave-
Start .
form on the oscilloscope. Adjust the variable optical attenuator so that the
waveform monitor is not saturated.
(4)
(5)
Observe the waveform on the oscilloscope and measure the pulse width at
an amplitude half its maximum value as shown in the figure below and
check that the measurement result is within standard values.
To continue measurements at another pulse width, return to Setup screen 1
and change the pulse width and make a measurement from Step 2 above
using the same procedure.
Peak level
1/2
1/2
Pulse width
8-9
8
Performance Test and Calibration
8.1.2
Section 8 Performance Test and Calibration
8.1.3
Dynamic range (one-way back-scattered light dynamic range test)
This test checks if the dynamic range conforms to specifications. This test is
performed for each wavelength and pulse width.
Setup
Connect the units as shown in the figure below.
MW9076 Series
SM optical fiber (75 km) or
GI optical fiber (12 km)
Matching Oil
Test procedure
(1) Set the parameters as shown below on Setup screen 1.
(a) Set Mode in Measurement mode to Manual.
(b) Set Wave Length (wavelength) in Measurement Parameters to the
wavelength at which a measurement is to be performed.
(c) Set Distance (distance range) in Measurement Parameters to 100 km.
(d) Set Attenuation (attenuator) in Measurement Parameters to Auto.
(e) Set Pulse Width (pulse width) in Measurement Parameters to the pulse
width to be measured.
(f) Set Average Limit Item in Measurement Parameters to Time and set the
Average Limit Value to 180s.
Start .
(2)
Press
(3)
Set the display mode to loss.
(4)
After averaging is completed, read the following value from the displayed
waveform.
• Difference between the level at the end of the optical connector in the
OTDR and the peak level of floor noise.
(5)
8-10
Check that the level difference conforms to the specifications set for each
wavelength and pulse width.
8.1 Performance Test
Horizontal axis accuracy
This test checks the accuracy of the horizontal scale, or the measured distance, by
making a measurement on an optical fiber whose fiber length and IOR are known.
This test needs to be performed only at one distance range.
Setup
Connect the units as shown in the figure below.
MW9076 Series
SM or GI optical fiber (~4 km)
Test procedure
(1) Set the parameters as shown below on Setup screen 1.
(a) Set Wave Length (wavelength) in Measurement Parameters.
(b) Set Distance (distance range) in Measurement Parameters to 5 km.
(c) Set Pulse Width (pulse width) in Measurement Parameters to the pulse
width to be measured.
(d) Set IOR (index of refraction) in Measurement Parameters.
(2)
Press
(3)
Put a marker at the far end Fresnel reflection and set the horizontal scale to
(4)
0.005 km/div.
Set Averaging to ON.
(5)
Start .
Precisely set the marker at the rising edge of the Fresnel reflection and read
the absolute distance. Check that this value conforms to the specifications.
×
×
8-11
8
Performance Test and Calibration
8.1.4
Section 8 Performance Test and Calibration
8.1.5
Vertical axis accuracy
This test checks the accuracy of the vertical scale, or the level measurement.
Setup
Connect the units as shown in the figure below.
3 m max.
MW9076 Series
Variable Optical
Attenuator
ATT-A
SM Optical Fiber (25 km) or
GI Optical Fiber (4 km)
ATT-B
4 % Fresnel Reflection
Test procedure
(1)
Set the parameters as shown below on Setup screen 1.
(a) Set Wave Length (wavelength) in Measurement Parameters.
(b) Set Pulse Width (pulse width) in Measurement Parameters to 100 ns.
(2)
Press
(3)
Set the loss display.
(4)
Set the × marker to the zero level and the * marker to the far-end Fresnel
reflection.
(5)
Set ATT-B to 0 dB, and then adjust ATT-A so that the far-end Fresnel reflection peak is slightly below the saturation level (within 0.2 dB).
(6)
Read the level of the Fresnel reflection from the OTDR screen and define
this value as PL0.
(7)
Set ATT-B to 0 dB and measure the level of Fresnel reflection. Define this
value as PH0.
(8)
Return ATT-B to 0 dB and increase the attenuation of ATT-A by 1 dB and
measure the level of Fresnel reflection. Define this value as PL1.
(9)
Set ATT-B to 2 dB and read the level of Fresnel reflection. Define this
value as PH1.
Start .
(10) Increase the attenuation of ATT-A in 1 dB steps up to 15 dB to measure PLi
and PHi at each step.
(11) Obtain the vertical axis accuracy at each ATT-A setting using the following
formula and check that they conforms to the specifications.
• Vertical axis accuracy = { (PLi – PHi) – ∆}/∆ A
where, ∆ A is the difference between ATT-B settings at 0 dB and 2 dB
(calibrated in advance).
8-12
8.1 Performance Test
Optical power level and wavelength of visible LD
This test can be performed when the visible LD option is installed.
Setup
Connect the units as shown in the figure below.
SM Optical Fiber
(Length: 2 m max.
Bending radius: 50 mm min.)
MW9076 Series
Optical Spectrum Analyzer
Optical Power Meter
Test procedure
Set the Visible LD to ON in the Setup screen and measure the center wavelength
with a spectrum analyzer and the optical output level with the optical power
meter.
Note:
The performance test for wavelength and optical output level must be
performed when the visible LD emits continuous light and not pulsed
light.
8-13
8
Performance Test and Calibration
8.1.6
Section 8 Performance Test and Calibration
8.1.7
Optical output level and wavelength of the light source
This test can be performed with the OTDR main unit equipped with a light source
function (MW9076B/C).
Setup
Connect the units as shown in the figure below.
SM Optical Fiber
(Length: 2 m max.
Bending radius: 50 mm min.)
MW9076B/C
Optical Spectrum Analyzer
Optical Power Meter
Test procedure
Using an optical power meter check that the light output meets the specifications.
Using a spectrum analyzer check that the center wavelength and the spectral
width meet the specifications.
8-14
8.1 Performance Test
8.1.8
Measurement range and accuracy of the power meter (options
02 and 03)
This test can be performed when the power meter option is installed in
MW9076B/B1/C.
Setup (measurement range)
Connect the units as shown in the figure below.
Function
Reference
Reference optical optical meter
detector
generator
ML9001A
Modulation (270 Hz, 1 kHz, 2 kHz)
Optical variable
attenuator
MW9076B/B1/C-02, -03
Test procedure (measurement range)
(1) Connect the optical variable attenuator and the reference optical detector.
(2)
Adjust the optical variable attenuator so that the reading of the reference
optical power meter is equal to the maximum measurement level.
(3)
(4)
Connect the optical variable attenuator and the device under test (DUT).
Read the indication value of the DUT, compare it with the maximum measurement level, and make adjustments so that the difference is within ±0.5
dB.
(5)
Repeat Steps 1 to 4 above from 0 dBm up to the minimum measurement
level plus 10 dB in increments of 10 dB.
(6)
Connect the optical variable attenuator and the reference optical detector,
and adjust the optical variable attenuator so that the reference optical power
(7)
(8)
meter reading is equal to the minimum measurement level.
Connect the optical variable attenuator and the DUT.
Read the indication value of the DUT, compare it with the minimum measurement level, and check that the difference is within ±1 dB.
8-15
8
Performance Test and Calibration
LD Light Source
Section 8 Performance Test and Calibration
Setup (accuracy)
Connect the units as shown in the figure below.
Reference optical
Reference optical power meter
detector
ML9001A
LD Light Source
Optical variable
attenuator
MW9076B/B1/C-02, -03
Test procedure (accuracy)
The accuracy of the reference optical power meter is within 2 % of the national
standard. The sum of the error of the reference optical power meter to the national
standard and the error of the DUT to the reference optical power meter should be
within ±5 %.
Measure the accuracy at an input level of –10 dBm, a measurement wavelength of
1.31 or 1.55 µm, and an ambient temperature of 25 ˚C .
8-16
(1)
Connect the optical variable attenuator and the reference optical detector.
(2)
Adjust the optical variable attenuator so that the reading of the reference
optical power meter is equal to –10.00 dBm.
(3)
(4)
Connect the optical variable attenuator and the DUT.
Check that the reading of the DUT is equal to –10.0 ± 0.2 dBm.
8.1 Performance Test
Chromatic dispersion value (MW9076D/D1)
This item should be tested to check the performance of the chromatic dispersion
function is fixed.
Set up
Connect the unit as shown in the figure below.
Chromatic dispersion value
known SM Fiber (25 km)
4% fresnel
refraction
Test procedure
1. Connect the SM optical fiber cable (1.3 µm zero dispersion) which is known
2.
the chromatic dispersion value.
Measure chromatic dispersion with the CD mode and confirm the measurement repeatability be within the specification.
8
Performance Test and Calibration
8.1.9
8-17
Section 8 Performance Test and Calibration
8.1.10
Insertion loss of the optical channel selector (MU960001A/2A)
This item should be tested to check the performance of the optical channel selector (MU960001A/2A) is fixed.
Set up
Connect the unit as shown in the figure below.
LD Light Source
COM
CH1 to 4 or 8
Optical detecter
Optical Power Meter
MW9076B/B1/C + MU960001A/2A + MU250000A/A1
Test procedure
1. Using an optical power meter, check the output power of LD light source
2.
3.
(1.31/1.55 µm CW)
Connect the LD light source output to COM port of MU960001A/2A.
Connect the power meter to each port (CH1 to 4 or 8) of MU960001A/2A
and set the channel on the Setup mode (1/3) screen. Close Setup mode and
check differences between the LD light source output power with/without
MU960001A/2A.
4.
8-18
Confirm the measurement result be within specification.
8.2 Calibration
Calibration
Only the back-scattered level can be calibrated using the OTDR.
Setup
Prepare an optical connector with a known return loss R0 dB and connect the units
as shown in the figure below.
Optical Connector
of Known Return Loss
MW9076 Series
Optical Fiber
Optical Fiber
Calibration procedure
(1)
Display Setup screen 1 and set Backscatter Level to 0 dB.
(2)
Press
Start . After the measurement is completed, press
F3
(Splice & Return Loss) and select “Splice & Return Loss.” Press
F4
(LSA) and set the linear approximation method to LSA. Set the * and ∇
(3)
markers at the rising edge and the top of the Fresnel reflection, respectively.
Display the connector at the center of the screen in such a manner that as far
as possible, the maximum length of the straight parts L1 and L2 before and
after the connector are included in the screen and no other splices, connections, and fault points are included on the screen.
L1
L2
Off-screen
(4)
Set Averaging to ON and wait until the noise becomes minimum.
(5)
The Return loss is displayed at the bottom left of the screen. Define the
value as R1 dB.
(6)
Obtain the difference between the value in Step 5 and R0 dB, the known
value of the return loss of the optical connector (R1–R0). Set this value at
(7)
Backscatter Level on Setup screen 1 together with its sign.
Return to the measurement screen. Calibration is completed when the displayed Return loss becomes equal to R0.
8-19
8
Performance Test and Calibration
8.2
Section 8 Performance Test and Calibration
8.3
Performance Test Result Record Form
Test location :
Unit name
:
Serial No.
:
Ambient temperature :
˚C
Relative humidity
%
Remarks
8-20
:
:
Report No.
:
Date
:
Tested by
:
Power source frequency :
Hz
8.3 Performance Test Result Record Form
MW9076B OTDR main unit
Test item
Standard
Result
Remarks
Center
1310 nm
±25 nm
Pulse width : 1 µs
wavelength
1550 nm
±25 nm
Pulse width : 1 µs
Pulse
10 ns
10 ns
width
20 ns
20 ns
50 ns
50 ns
100 ns
100 ns
500 ns
500 ns
1000 ns
1000 ns
2000 ns
2000 ns
4000 ns
4000 ns
10000 ns
10000 ns
20000 ns
20000 ns
Dynamic
range
Wavelength (nm)
1550
1310
10 ns
8.9 dB
6.9 dB
20 ns
10.9 dB
8.9 dB
50 ns
12.9 dB
10.9 dB
100 ns
14.4 dB
12.4 dB
500 ns
22.4 dB
20.4 dB
1000 ns
24.4 dB
22.4 dB
2000 ns
25.9 dB
23.9 dB
4000 ns
29.9 dB
27.9 dB
10000 ns
37.4 dB
35.4 dB
20000 ns
39.9 dB
37.9 dB
Horizontal axis accuracy
1310
1550
8
±1 m ±3 × measured
distance × 10 ± marker
resolution
±0.05 dB/dB or ±0.1 dB
Vertical axis accuracy
(whichever is greater)
Visible LD Center wavelength
Optical output power
635 ±15 nm
When Option 01 is installed
–3.0 ±1.5 dBm
When Option 01 is installed
Light
Center
1310 nm
±25 nm
CW
source
wavelength
1550 nm
±25 nm
CW
Optical
1310 nm
–3.0 ±1.5 dBm
CW
output power 1550 nm
–3.0 ±1.5 dBm
CW
Spectral
1310 nm
5 nm or less
CW
width
1550 nm
10 nm or less
CW
Power
Measurement Option 02
+3 dBm to –70 dBm
CW
meter
range
+0 dBm to –75 dBm
Modulation
+23 dBm to –50 dBm
CW
Option 03
Accuracy
+20 dBm to –55 dBm
Modulation
Option 02
±5 %
–10 dBm, 1.31/1.55 CW
Option 03
±5 %
–10 dBm, 1.31/1.55 CW
8-21
Performance Test and Calibration
–5
Section 8 Performance Test and Calibration
MW9076B1 OTDR main unit
Test item
Standard
Result
Remarks
1310 nm
±25 nm
Pulse width : 1 µs
wavelength 1550 nm
±25 nm
Pulse width : 1 µs
Center
Pulse
10 ns
10 ns
width
20 ns
20 ns
50 ns
50 ns
100 ns
100 ns
500 ns
500 ns
1000 ns
1000 ns
2000 ns
2000 ns
4000 ns
4000 ns
10000 ns
10000 ns
20000 ns
20000 ns
Dynamic
range
Wavelength (nm)
1550
1310
10 ns
8.9 dB
6.9 dB
20 ns
10.9 dB
8.9 dB
50 ns
12.9 dB
10.9 dB
100 ns
14.4 dB
12.4 dB
500 ns
22.4 dB
20.4 dB
1000 ns
24.4 dB
22.4 dB
2000 ns
25.9 dB
23.9 dB
4000 ns
29.9 dB
27.9 dB
10000 ns
33.9 dB
31.9 dB
20000 ns
35.4 dB
33.4 dB
Horizontal axis accuracy
1310
1550
±1 m ±3 × measured
distance × 10–5 ± marker
resolution
±0.05 dB/dB or ± 0.1 dB
Vertical axis accuracy
(whichever is greater)
Visible
Center wavelength
635 ± 15 nm
LD
When Option 01 is
installed
Optical output power
–3.0 ± 1.5 dBm
When Option 01 is
installed
Power
Measurement Option 02
+3 dBm to –70 dBm
CW
meter
range
+0 dBm to –75 dBm
Modulation
Option 03
Accuracy
8-22
+23 dBm to –50 dBm
CW
+20 dBm to –55 dBm
Modulation
Option 02
±5 %
–10 dBm, 1.31/1.55 CW
Option 03
±5 %
–10 dBm, 1.31/1.55 CW
8.3 Performance Test Result Record Form
MW9076C OTDR main unit
Test item
Standard
Result
Remarks
Center
1310 nm
±25 nm
Pulse width : 1 µs
wavelength
1550 nm
±25 nm
Pulse width : 1 µs
1625 nm
±25 nm
Pulse width : 1 µs
Pulse
10 ns
10 ns
width
20 ns
20 ns
50 ns
50 ns
100 ns
100 ns
500 ns
500 ns
1000 ns
1000 ns
2000 ns
2000 ns
4000 ns
4000 ns
10000 ns
10000 ns
20000 ns
20000 ns
range
1310
1550
1625
10 ns
8.9 dB
6.9 dB
4.4 dB
20 ns
10.9 dB 8.9 dB
6.4 dB
50 ns
12.9 dB 10.9 dB 8.4 dB
100 ns
14.4 dB 12.4 dB 9.9 dB
500 ns
22.4 dB 20.4 dB 17.9 dB
1000 ns
24.4 dB 22.4 dB 19.9 dB
2000 ns
25.9 dB 23.9 dB 21.4 dB
4000 ns
29.9 dB 27.9 dB 25.4 dB
10000 ns
36.4 dB 34.4 dB 31.9 dB
20000 ns
38.9 dB 36.9 dB 34.4 dB
Wavelength (nm)
Horizontal axis accuracy
1310
1550
1625
±1 m ±3 × measured
8
distance × 10–5 ± marker
resolution
±0.05 dB/dB or ±0.1 dB
Vertical axis accuracy
(whichever is greater)
Visible LD Center wavelength
Optical output power
635 ±15 nm
When Option 01 is installed
–3.0 ±1.5 dBm
When Option 01 is installed
Light
Center
1310 nm
±25 nm
CW
source
wavelength
1550 nm
±25 nm
CW
1625 nm
±25 nm
CW
1310 nm
–3.0 ±1.5 dBm
CW
output power 1550 nm
–3.0 ±1.5 dBm
CW
1625 nm
–3.0 ±1.5 dBm
CW
Spectral
1310 nm
5 nm or less
CW
width
1550 nm
10 nm or less
CW
1625 nm
10 nm or less
CW
Option 02
+3 dBm to –70 dBm
CW
+0 dBm to –75 dBm
Modulation
+23 dBm to –50 dBm
CW
+20 dBm to –55 dBm
Modulation
Option 02
±5 %
–10 dBm, 1.31/1.55 CW
Option 03
±5 %
–10 dBm, 1.31/1.55 CW
Optical
Power
Measure-
meter
ment range
Option 03
Accuracy
8-23
Performance Test and Calibration
Dynamic
Section 8 Performance Test and Calibration
MW9076D OTDR main unit
Test item
Standard
Result
Remarks
1310 nm
±3 nm
Pulse width : 1 µs
wavelength 1410 nm
±3 nm
Pulse width : 1 µs
1550 nm
±3 nm
Pulse width : 1 µs
1625 nm
±3 nm
Pulse width : 1 µs
Pulse
10 ns
10 ns
width
20 ns
20 ns
50 ns
50 ns
100 ns
100 ns
500 ns
500 ns
1000 ns
1000 ns
2000 ns
2000 ns
4000 ns
4000 ns
10000 ns
10000 ns
20000 ns
20000 ns
Center
Dynamic
range
Wavelength (nm)
10 ns
1310
-
1410
1550
1625
1310
1410
1550
1625
-
-
-
-
-
-
-
-
-
-
-
-
-
20 ns
3.9 dB
2.9 dB
50 ns
5.9 dB
4.9 dB
3.9 dB
100 ns
7.4 dB
6.4 dB
5.4 dB
2.9 dB
500 ns
15.4 dB
14.4 dB
13.4 dB
10.9 dB
1000 ns
17.4 dB
16.4 dB
15.4 dB
12.9 dB
2000 ns
18.9 dB
17.9 dB
16.9 dB
14.4 dB
4000 ns
22.9 dB
21.9 dB
20.9 dB
18.4 dB
10000 ns
29.4 dB
28.4 dB
27.4 dB
24.9 dB
20000 ns
31.9 dB
30.9 dB
29.9 dB
27.4 dB
Horizontal axis accuracy
-
±0.1 m ±3 × measured distance
× 10−5 ± marker resolution
Vertical axis accuracy
±0.05 dB/dB or ±0.1 dB
(whichever is greater)
Visible
Center
LD
wavelength
Optical output
635 ±15 nm
When Option 01 is
installed
−3.0 ±1.5 dBm
installed
power
Chromatic Dispersion
Dispersion Repeatability
8-24
When Option 01 is
.
± 0.05 ps/(nm km)
Wavelength: 1.55 µm
8.3 Performance Test Result Record Form
MW9076D1 OTDR main unit
Standard
Result
Remarks
1310 nm
–3 nm
Pulse width : 1 µs
wavelength 1450 nm
–3 nm
Pulse width : 1 µs
1550 nm
–3 nm
Pulse width : 1 µs
1625 nm
–3 nm
Pulse width : 1 µs
Pulse
10 ns
10 ns
width
20 ns
20 ns
50 ns
50 ns
100 ns
100 ns
500 ns
500 ns
1000 ns
1000 ns
2000 ns
2000 ns
4000 ns
4000 ns
10000 ns
10000 ns
20000 ns
20000 ns
Dynamic
range
Wavelength (nm)
10 ns
1310
-
1450
1550
1625
1310
1450
1550
1625
-
-
-
-
-
-
-
-
-
-
-
-
-
20 ns
3.9 dB
2.9 dB
50 ns
5.9 dB
4.9 dB
3.9 dB
100 ns
7.4 dB
6.4 dB
5.4 dB
2.9 dB
500 ns
15.4 dB
14.4 dB
13.4 dB
10.9 dB
1000 ns
17.4 dB
16.4 dB
15.4 dB
12.9 dB
2000 ns
18.9 dB
17.9 dB
16.9 dB
14.4 dB
4000 ns
22.9 dB
21.9 dB
20.9 dB
18.4 dB
10000 ns
29.4 dB
28.4 dB
27.4 dB
24.9 dB
20000 ns
31.9 dB
30.9 dB
29.9 dB
27.4 dB
Horizontal axis accuracy
-
8
±0.1 m ±3 × measured distance
× 10−5 ± marker resolution
Vertical axis accuracy
±0.05 dB/dB or ±0.1 dB
(whichever is greater)
Visible
Center
LD
wavelength
Optical output
635 ±15 nm
When Option 01 is
installed
−3.0 ±1.5 dBm
installed
power
Chromatic Dispersion
When Option 01 is
.
± 0.05 ps/(nm km)
Wavelength: 1.55 µm
Dispersion Repeatability
8-25
Performance Test and Calibration
Test item
Center
Section 8 Performance Test and Calibration
MW9076J OTDR main unit
Test item
Standard
850 nm
±30 nm
Dynamic
10 ns
11.3 dB
range
20 ns
13.3 dB
50 ns
15.3 dB
Center
Result
Remarks
Pulse width : 100 ns
wavelength
100 ns
Horizontal axis accuracy
18.4 dB
±1 m ±3 × measured distance ×
10−5 ± marker resolution
Vertical axis accuracy
±0.05 dB/dB or ±0.1 dB
(whichever is greater)
Visible
Center
LD
wavelength
Optical output
635 ±15 nm
−3.0 ±1.5 dBm
power
MW9076K OTDR main unit
Test item
Standard
Result
Center
850 nm
±30 nm
wavelength
1300 nm
±30 nm
Dynamic
Wavelength (nm)
range
10 ns
11.3 dB
10.3 dB
20 ns
13.3 dB
12.3 dB
50 ns
15.3 dB
14.3 dB
100 ns
18.4 dB
15.8 dB
500 ns
–
19.3 dB
1000 ns
–
22.4 dB
Horizontal axis accuracy
Pulse width : 100 ns
850
1300
±1 m ±3 × measured distance ×
10−5 ± marker resolution
Vertical axis accuracy
±0.05 dB/dB or ±0.1 dB
(whichever is greater)
Visible
Center
LD
wavelength
Optical output
power
8-26
635 ±15 nm
−3.0 ±1.5 dBm
Remarks
8.3 Performance Test Result Record Form
MU960001A
Test item
Wavelength (nm)
Insertion
loss
Standard
1310
1550
Result
1310
Remarks
1550
CH 1
CH 2
CH 3
CW
≤2.5 dB
CH 4
MU960002A
Test item
Wavelength (nm)
Standard
1310
1550
Result
1310
Remarks
1550
CH 1
CH 2
loss
CH 4
CH 5
≤4.5 dB
CW
CH 6
CH 7
CH 8
8
Performance Test and Calibration
Insertion
CH 3
8-27
Section 8 Performance Test and Calibration
8-28.
Section 9 Maintenance
This section explains how to clean the OTDR to maintain its performance, as well
as how to detect abnormalities using the self-diagnosis function.
Optical Connector & Optical Adapter
Cleaning ........................................................
9-2
9.2
9.3
Cleaning the Floppy Disk Drive .....................
Self-Diagnosis ...............................................
9-5
9-6
9.3.1 Self-diagnosis at power on .................
9.3.2 Self-diagnosis function .......................
9-6
9-6
Suggestions for Storage ................................
Method of Transportation ..............................
9-8
9-9
9.4
9.5
9
Maintenance
9.1
9-1
Section 9 Maintenance
9.1
Optical Connector & Optical Adapter Cleaning
Cleaning built-in ferrule end-face
Use adapter cleaner supplies for this unit to clean the built-in optical I/O connector ferrule. Clean the ferrule periodically. An example of the FC adapter is described below. Follow similar methods and steps for cleaning other adapters.
(1)
Pull the adapter lever up then gently pull the adapter out straight towards
you after checking that the latch is released.
Adapter Lever
Latch
(2)
Clean by pressing the adapter cleaner which is soaked in alcohol to the ferrule end-face and side face.
Adapter Cleaner
9-2
9.1 Optical Connector & Optical Adapter Cleaning
(3)
Finish by pressing the tip of a new adapter cleaner without any alcohol on it
to the ferrule end-face and wipe in one direction 2 or 3 times.
(4)
Clean the adapter interior with adapter cleaner.
(Refer to “Cleaning optical adapter” below.)
(5)
Attach the adapter using the steps in reverse order. Be careful not to scratch
the ferrule end-face.
Cleaning optical adapter
Use adapter cleaner supplies for this unit to clean the optical adapter for connection to the fiber-optic cable. An example of the FC adapter is described below.
Follow similar methods and steps for cleaning other adapters. In addition, clean
the adapter which was removed to clean the built-in ferrule end-face using the
following steps.
Insert the adapter cleaner to the split sleeve interior of the adapter then move it
back and forth while rotating it in one direction.
Note:
Check the ferrule radius. Use only a φ1.25 mm or φ2.5 mm dedicated
adapter cleaner.
9-3
Maintenance
9
Section 9 Maintenance
Cleaning the ferrule end-face of the fiber-optic cable
Use ferrule cleaner supplies for this device to clean the ferrule of the cable end.
An example of the FC connector is described below. Follow similar methods and
steps for cleaning other connectors.
(1)
Lift the ferrule cleaner lever to access the cleaning face.
Ferrule Cleaner
Lever
Cleaning Face
(2)
Keep the lever in this position then press down the ferrule end-face of the
optical connector on the cleaning face and rub in one direction.
Notes on cleaning
(1) Do not clean with used adapter cleaner.
(2)
Do not finish clean with a cotton swab as cotton fibers may adhere to the
surface.
(3)
Make sure to cap adapters that are not in use.
WARNING
Ensure that no light is emitted when cleaning or checking the ferrule end-face.
CAUTION
Performance may be degraded if used when dust or
dirt is adhering to the ferrule end-face. In addition, the
connected fiber-optic cable & ferrule end-face of this
unit may burn out if high-output light is used in this
state. Clean the connected fiber-optic cable and ferrule
end-face of this device before performing measurements.
9-4
9.2 Cleaning the Floppy Disk Drive
Cleaning the Floppy Disk Drive
Dust may cause the floppy disk drive to malfunction. Therefore, it is necessary to
periodically clean the floppy disk drive. Use a commercially available cleaning
disk for the cleaning.
No particular disk is recommended by Anritsu. If you have any questions regarding the purchase of a cleaning disk, please feel free to contact Anritsu Corporation
or your nearest service representative.
If the floppy disk does not work properly even after cleaning, there is a possibility
of its failure. In this case please contact Anritsu Corporation or your nearest
service representative for repairs.
9
Maintenance
9.2
9-5
Section 9 Maintenance
9.3
Self-Diagnosis
9.3.1
Self-diagnosis at power on
The operating system (OS) installed in the OTDR checks the internal memory
and the interface. If an error occurs, a message “Error” is displayed on the screen
and operation stops.
If the message “Error” is displayed, turn off the power and then turn it on again.
There is a possibility of failure if the message is displayed even after turning on
the power. In this case please contact Anritsu Corporation or your nearest service
representative for repairs.
The OTDR activates the internal program (Internal File System) after the OS has
completed the above check. Therefore, it takes about one minute to display the
Setup screen after the power is turned on.
If an error occurs during this period, the OTDR stops without displaying a message. If the Setup screen does not appear even after a lapse of one or two minutes,
there is a possibility of failure. In this case please contact Anritsu Corporation or
your nearest service representative for repairs.
9.3.2
Self-diagnosis function
The OTDR has a self-diagnosis function which can be used to check the internal
program (Internal File System).
The procedure for executing the self-diagnosis function is shown below.
(1)
Make certain that the fiber is not connected to the I/O connector of the
OTDR.
(2)
Press Menu
(3)
When the menu window opens, select Configuration with the
on the measurement screen.
and
keys.
(4)
(5)
When Configuration is selected, the function key label F5 is indicated with
Selftest.
When
F5
displayed.
9-6
(Selftest) is pressed, the screen shown on the next page is
9.3 Self-Diagnosis
(6)
Pressing
F1
(Selftest Execute) starts the self-diagnosis test. Provided
that an item is indicated with a horizontal line under Result in the Selftest
(7)
window, it is not self-diagnosed.
If the self-diagnosis is successfully completed, OK (normal) or NG (abnormal) is displayed under Result in the Selftest window.
Execute self-diagnosis again when an error is occurred in Internal file System. The
error may disappear if it is recovered. If NG is displayed even after self-diagnosis is
executed again, there is a possibility of failure. In this case please contact Anritsu
Corporation or your nearest service representative for repairs.
CAUTION
9
It takes about one minute to complete the self-diagnosis. Wait until it is completed (it cannot be stopped). If
Maintenance
the power is turned off during self-diagnosis, the internal file system may be destroyed and the OTDR may
not work properly.
When performing self-diagnosis, do not connect a fiber
to the OTDR input/output connector. Self-diagnosis
may not be executed properly.
Do not look into the connector because optical light is
outputted from the OTDR input/output connector during self-diagnosis. It is recommended that the connector be covered with a dust cover.
9-7
Section 9 Maintenance
9.4
Suggestions for Storage
The following points should be kept in mind if the equipment is not to be used for
a long period of time.
(1)
(2)
Store the equipment after removing the dust on it.
Do not store the equipment at a place where the temperature in greater than
(3)
60˚C or less than –20˚C, or where the humidity is greater than 85 %.
Do not store the equipment in a place where it is exposed to direct sunlight
(4)
or dust.
Do not store the equipment in a place where there is a possibility of conden-
(5)
sation or erosion by active gas.
Do not store the equipment in the place where there is a possibility of oxi-
(6)
dization or strong vibrations.
It is recommended that the battery pack is removed from the equipment.
Recommended conditions for storage
It is recommended that the equipment be stored in a place which satisfies the
above requirements and the conditions below.
9-8
(1)
(2)
Temperature: from 5 to 30 ˚C
Humidity:
from 40 to 75 %
(3)
Where the changes in temperature and humidity within one day are not
large.
9.5 Method of Transportation
Method of Transportation
To transport this equipment, repack it using the packing materials used at the time
of purchasing. If the packing materials have not been kept, repack it as indicated
in step (3) and (4) below.
The repackaging procedure is as follows.
(1)
(2)
Clean the equipment surface with a dry cloth.
Check that the screws are tight.
(3)
Cover the projections and portions which can be easily deformed, and wrap
this equipment in a polyester sheet.
(4)
Place the wrapped equipment into a corrugated paper box and seal the box
with an adhesive tape. Then, insert this into a wooden box suitable for longdistance transportation.
9
Maintenance
9.5
9-9
Section 9 Maintenance
9-10.
Appendix
These appendixes contain the following reference information.
Appendix A Specifications .....................................
(1) OTDR main unit (MW9076B/C) .............
A-1
A-1
(2) OTDR main unit (MW9076B1) ...............
(3) OTDR main unit (MW9076D) .................
A-4
A-7
(4) OTDR main unit (MW9076D1) ............... A-10
(5) OTDR main unit (MW9076J) ................. A-13
(6) OTDR main unit (MW9076K) ................. A-16
(7) Display unit (MU250000A,
MU250000A1, MU250000A4) ................ A-19
(8) Battery pack
(CGR-B/802D or CGR-B/802E) ............. A-20
(9) AC adapter ............................................. A-20
(10) Visible LD
(MW9076B/B1/C/D/D1/J/K-01) .............. A-20
(11) Optical power meter
(MW9076B/B1/C-02) ............................. A-21
(12) High input optical power meter
(MW9076B/B1/C-03) ............................. A-21
(13) Optical channel selector unit
(MU960001A, MU960002A) .................. A-21
Method ...............................................
Appendix C Splice Loss Measurement Principle ...
B-1
C-1
Appendix D Return Loss Measurement Principle ..
Appendix E Total Return Loss Measurement
D-1
Principle ..............................................
Appendix F Settings at Factory Shipment .............
E-1
F-1
Appendix G List of Recommended Printers ...........
Appendix H Marker Resolution ..............................
G-1
H-1
Appendix I Simple OTDR Operation Method .......
I -1
App-1
Appendix Appendix
(14) Peripherals and parts ............................. A-22
Appendix B Least Square Linear Approximation
Appendix
App-2.
Appendix A Specifications
(1) OTDR main unit (MW9076B/C)
Item
Model name, unit name
Standard
Remarks
MW9076B SMF 1.31/1.55 µm OTDR
MW9076C SMF 1.31/1.55/1.625 µm OTDR
Wavelength
MW9076B
1310/1550 ± 25 nm
At 25 °C
MW9076C
1310/1550/1625 ± 25 nm
Pulse width: 1 µs
Fiber under test
10/125 m single mode fiber (ITU-T G.652)
Optical connector
• FC
: Option 37
• SC
: Option 40
Install one of them.
• DIN
: Option 39
The connectors can be
• HMS-10/A
: Option 43
replaced by the user
• ST
: Option 38
PC type
FC.APC
: Option 25
SC.APC
: Option 26
HRL-10
: Option 47
Factory option
APC type
Automatic measurement *1
Measurement items
Total loss and Total return loss or Average loss
Distance, splice loss, return loss, and reflectance of
each event (Table display)
Threshold value
Splice loss
0.01 to 9.99 dB (0.01 dB increments)
Return loss
20 to 60 dB (0.1 dB increments)
Far end of fiber
1 to 99 dB (1 dB increments)
Detected events
Up to 99
Auto setting
Distance range, pulse width, number of times of
averaging (time)
Within 60 seconds
Connection check
Check the connection status of mouth connector
Communication light check
Check for communication light in the test optical fiber.
At Full Auto measurement
Manual measurement
Measurement items
Loss and distance between any two points, loss per
unit length between two points, splice loss, return
loss or reflectance, total return loss
Real time sweeping
Sweeping time: 0.1 to 0.2 seconds or less
At Quick mode
*1 Automatic measurement is a supporting function which enables to operate easier, it doesn't assure results. As
there is a case of miss detection, check the waveform as well.
A-1
Appendix Appendix
Measurement time
Appendix A Specifications
Item
Distance range
Pulse width
Dynamic range (SNR=1)
MW9076B
MW9076C
Dead zone
Back-scattered light
Fresnel reflection
Marker resolution
Sampling resolution
Number of sampling points
Quick mode
Normal mode
High mode
Vertical scale
IOR Settings
Distance measurement
accuracy
Loss measurement accuracy(linearity)
Return loss measurement accuracy
Optical loss measurement
light source
Applicable fiber
Optical connector
Light emission element
Central wavelength
Spectral width
Output level accuracy
Optical output
instantaneous stability:
Output wavelength
Warming up time
Laser safety level
Standard
1/2.5/5/10/25/50/100/200/250/400 km
10/20/50/100/500/1000/2000/4000/10000/20000 ns
Remarks
IOR = 1.500000
42.5/40.5 dB (1.31/1.55 µm)
Typical 45.0/43.0 (1.31/1.55 µm)
41.5/39.5/37 dB (1.31/1.55/1.625 µm)
At 25 °C, 20 µs
1.31 µm : ≤8 m
1.55 µm : ≤9 m
1.625 µm : ≤12 m (MW9076C)
1.31 µm : ≤1.6 m
1.55 µm : ≤1.6 m
1.625 µm : ≤1.6 m (MW9076C)
0.05 to 800 m
0.05 to 80 m
5001 or 6251
20001 or 25001
40001 or 50001
0.25, 0.5, 1, 2.5, 5, 10, 15 dB/div
Pulse width: 10 ns
Return loss: 40 dB
Deviation: ±0.1 dB
Pulse width: 10 ns
IOR = 1.500000
IOR = 1.500000
*2
15 dB/div is indicated
only at Auto and Full
Auto measurement
1.400000 to 1.699999 (0.000001 Steps)
±1 m ± 3 × measured distance × 10−5 ± marker
resolution
* Uncertainty due to the index of refraction is excluded
± 0.05 dB/dB or ± 0.1 dB (whichever is greater)
±2 dB
SM fiber (ITU-T G.652), PC Type
Shared with OTDR (Same port)
FP-LD
1310/1550 ± 25 nm (MW9076B)
1310/1550/1625 ± 25 nm (MW9076C)
5/10 nm or less (MW9076B)
5/10/10 nm or less (MW9076C)
−3 ± 1.5 dBm
0.1 dB or less
CW, at 25 °C
CW, at 25 °C
CW, at 25 °C, SM fiber
2 m, CW, one point at −
10 to +40 °C (± 1 °C),
Difference between the
maximum and
minimum values in one
minute period.
SM fiber 2 m
CW/270 Hz/1 kHz/2 kHz
(Modulation light is square wave)
Modulated frequency : 270 Hz/1 kHz/2 kHz ± 1.5 %
10 minutes
21CFRClass 1, IEC Pub60825-1Class 1
*2 Either value is automatically selected in each mode, depending on the distance range.
A-2
(1) OTDR main unit (MW9076B/C)
Item
Other functions
Standard
Remarks
• Waveform storage:
Analysis format, Standard (GR-196-CORE)
format, Standard.V2 (SR-4731) format
• Printout: Centronics
• Continuous measurement:
Wavelength switching, waveform storage, and
series of operations such as print-out can be
performed with a single key stroke
• Relative distance setting (zero cursor setting)
• Waveform comparison
• Calendar function
• Distance unit setting: km, kf, mi, m, f
• Title entry: 32 characters
• Battery indication
Laser safety
21CFRClass 1, IEC Pub60825-1Class 1
Power supply
Power is supplied from the MU250000A/A1 display unit.
Refer to the specifications of the MU250000A/A1.
Power consumption
35W max. (when charged), Standard 4 W
Including MU250000A
power consumption
Continuous battery
6 h (typical) (CGR-B/802D)
Backlight low,
operation
7 h (typical) (CGR-B/802E)
measurement not executed
Dimension
194H × 290W × 30D mm
MW9076B/C only
194H × 290W × 75D mm
Including MU250000A
1.4 kg or less (MW9076B/C only)
Mass
4.0 kg or less (including MU250000A, battery pack)
Environmental conditions
Operating temperature,
−10 to +40 °C, ≤85 %
No condensation
humidity
Storage temperature,
−20 to +60 °C, ≤85 %
Vibration
Conforms to MIL-T-28800E Class 3
Drop test
Height 76 cm, 6 surfaces, 8 corners
On a plywood 5 cm
Dust-proof
MIL-T-28800E
thick fixed on a
Water-proof
MIL-T-28800E
concrete floor
EMC
Emission
Immunity
Appendix Appendix
humidity
EN 61326-1: 2006 (Class A)
EN 61000-3-2: 2006 (Class A equipment)
EN 61326-1: 2006 (Table 2)
A-3
Appendix A Specifications
(2) OTDR main unit (MW9076B1)
Item
Standard
Model name, unit name
MW9076B1 SMF 1.31/1.55 µm OTDR
Wavelength
1310/1550 ± 25 nm
Remarks
At 25 °C
Pulse width: 1 µs
Fiber under test
10/125 µm single mode fiber (ITU-T G.652)
Optical connector
• FC
: Option 37
• SC
: Option 40
• DIN
: Option 39
The connectors can be
• HMS-10/A
: Option 43
replaced by the user
• ST
: Option 38
Install one of them
PC type
Automatic measurement *1
Measurement items
Total loss and Total return loss or Average loss
Distance, splice loss, return loss, and reflectance of
each event (Table display)
Threshold value
Splice loss
0.01 to 9.99 dB (0.01 dB increments)
Return loss
20 to 60 dB (0.1 dB increment)
Far end of fiber
1 to 99 dB (1 dB increment)
Detected events
Up to 99
Auto setting
Distance range, pulse width, number of times of
Measurement time
averaging (time)
At Full Auto measurement
Within 60 seconds
Connection check
Check the connection status of the light source
Communication light check
Check for communication light in the test optical fiber.
At Full Auto measurement
connector
Manual measurement
Measurement items
Loss and distance between any two points, loss per
unit length between two points, splice loss, return
loss or reflectance, total return loss
Real time sweeping
Sweeping time: 0.1 to 0.2 seconds or less
At Quick mode
*1 Automatic measurement is a supporting function which enables to operate easier, it doesn't assure results. As
there is a case of miss detection, check the waveform as well.
A-4
(2) OTDR main unit (MW9076B1)
Item
Standard
Distance range
1/2.5/5/10/25/50/100/200/250/400 km
Pulse width
10/20/50/100/500/1000/2000/4000/10000/20000 ns
Dynamic range (SNR=1)
38/36 dB (1.31/1.55 µm)
Remarks
IOR = 1.500000
At 25 °C, 20 µs
Typical 40.5/38.5 dB (1.31/1.55 µm)
Dead zone
Back-scattered light
1.31 µm : ≤8 m
Pulse width 10 ns
1.55 µm : ≤9 m
Return loss 40 dB
Deviation: ±0.1 dB
Fresnel reflection
1.31 µm : ≤1.6 m
Pulse width 10 ns
1.55 µm : ≤1.6 m
Marker resolution
0.05 to 800 m
IOR = 1.500000
Sampling resolution
0.05 to 80 m
IOR = 1.500000
*2
Number of sampling points
Quick mode
5001 or 6251
Normal mode
20001 or 25001
High mode
40001 or 50001
Vertical scale
0.25, 0.5, 1, 2.5, 5, 10, 15 dB/div
15 dB/div is indicated
only at Auto and Full
Auto measurement
IOR Setting
1.400000 to 1.699999 (0.000001 steps)
Distance measurement
±1 m ± 3 × measured distance × 10−5 ±marker resolution
accuracy
* Uncertainty due to the index of refraction is excluded
Loss measurement accuracy(linearity)
±0.05 dB/dB or ±0.1 dB (whichever is greater)
Return loss measurement accuracy
±2 dB
Optical loss measurement
None
light source
Other functions
• Waveform storage:
Analysis format, Standard (GR-196-CORE)
format, Standard.V2 (SR-4731) format
Appendix Appendix
• Printout: Centronics
• Continuous measurement:
Wavelength switching, waveform storage
• A series of operations such as print-out can be
performed with a single key stroke
• Relative distance setting (zero cursor setting)
• Waveform comparison
• Calendar function
• Distance unit setting: km, kf, mi, m, f
• Title character entry: 32 characters
• Battery indication
*2 Either value is automatically selected in each mode, depending on the distance range.
A-5
Appendix A Specifications
Item
Standard
Laser safety
21CFRClass 1, IEC Pub60825-1Class 1
Power supply
Power is supplied from the MU250000A display
Remarks
unit.
Refer to the specifications of MU250000A.
Power consumption
35 W max. (when charged), Standard 4 W
Including MU250000A
power consumption
Continuous battery
6 h (typical) (CGR-B/802D)
Backlight low,
operation
7 h (typical) (CGR-B/802E)
measurement not executed
Dimension
194 (H) × 290 (W) × 30 (D) mm
MW9076B1 only
194 (H) × 290 (W) × 75 (D) mm
Including MU250000A
Mass
1.4 kg or less (MW9076B1 only)
4.0 kg or less (including MU250000A, battery pack)
Environmental conditions
Operating temperature,
−10 to +40 °C, ≤85 %
No condensation
humidity
Storage temperature,
−20 to +60 °C, ≤85 %
humidity
Vibration
Conforms to MIL-T-28800E Class 3
Drop test
Height 76 cm, 6 surfaces, 8 corners
On a plywood 5 cm
Dust-proof
MIL-T-28800E
thick fixed on a
Water-proof
MIL-T-28800E
concrete floor
EMC
EN 61326-1: 2006 (Class A)
Emission
Immunity
A-6
EN 61000-3-2: 2006 (Class A equipment)
EN 61326-1: 2006 (Table 2)
(3) OTDR main unit (MW9076D)
(3) OTDR main unit (MW9076D)
Item
Standard
Model name, unit name
MW9076D SMF 1.31/1.41/1.55/1.625 mm OTDR
Wavelength
1310/1410/1550/1625 ±3 nm
Fiber under test
10/125 mm single mode fiber (ITU-T G.652)
Optical connector
• FC
: Option 37
• SC
: Option 40
Remarks
At 25 °C Pulse width : 1 µs
Install one of them.
• DIN
: Option 39
The connectors can be
• HMS-10/A
: Option 43
replaced by the user
• ST
: Option 38
PC type
Automatic measurement *1
Measurement items
Total loss and Total return loss or Average loss
Distance, splice loss, return loss, and reflectance of
each event (Table display)
Threshold value
Splice loss
0.01 to 9.99 dB (0.01 dB increments)
Return loss
20 to 60 dB (0.1 dB increment)
Far end of fiber
1 to 99 dB (1 dB increment)
Detected events
Up to 99
Auto setting
Distance range, pulse width, number of times of
averaging (time)
Measurement time
Within 60 seconds
Connection check
Check the connection status of mouth connector.
Communication light check
Check for communication light in the test optical fiber.
At Full Auto measurement
Manual measurement
Measurement items
Loss and distance between any two points, loss per
unit length between two points, splice loss, return
loss or reflectance, total return loss
Sweeping time: 0.1 to 0.2 seconds or less
At Quick mode
*1 Automatic measurement is a supporting function which enables to operate easier, it doesn't assure results. As
there is a case of miss detection, check the waveform as well.
A-7
Appendix Appendix
Real time sweeping
Appendix A Specifications
Item
Standard
Remarks
IOR = 1.500000
Distance range
1/2.5/5/10/25/50/100/200/250/400 km
Pulse width
10/20/50/100/500/1000/2000/4000/10000/20000 ns
Dynamic range (SNR=1)
34.5/33.5/32.5/30.0 dB (1.31/1.41/1.55/1.625 µm)
At 25 °C, 20 µs
≤25 m
Pulse width 50 ns
Dead zone
Back-scattered light
Return loss 40 dB
Deviation: ±0.1 dB
≤3 m
Pulse width 10 ns
Marker resolution
0.05 to 800 m
IOR = 1.500000
Sampling resolution
0.05 to 80 m
IOR = 1.500000
Fresnel reflection
∗2
Number of sampling points
Quick mode
5001 or 6251
Normal mode
20001 or 25001
High mode
40001 or 50001
Vertical scale
0.25, 0.5, 1, 2.5, 5, 10, 15 dB/div
15 dB/div is indicated
only at Auto and Full
Auto measurement
IOR Setting
1.400000 to 1.699999 (0.000001 steps)
Distance measurement
±0.1 m ±3 × measured distance × 10–5 ±marker
accuracy
resolution
* Uncertainty due to the index of refraction is excluded
Loss measurement accuracy
±0.05 dB/dB or ± 0.1 dB (whichever the greater)
Return loss measurement
±2 dB
accuracy
Optical loss measurement
None
light source
Chromatic dispersion
Wavelength range
Wavelength 1.55 µm
measurement function
1300 to 1660 nm
SMF 25 km
Wavelength accuracy
± 0.5 nm*3 (typical)
Zero-dispersion repeatability
± 0.6 nm*4 (typical)
Dispersion repeatability
± 0.05 ps/(nm.km)*4 (typical)
Dynamic range
30 dB (4% Fresnel,typical)
*2 Either value is automatically selected in each mode, depending on the distance range.
*3 Compared value with internal wavelength data at chromatic dispersion measurement
*4 Measured with 25 km of 1.3 µm zero-dispension fiber. Not an error from absolute value but repeatability of
measured results. Dispersion repeatability is the value of 1.55 µm wavelength. Contact Anritsu in case of
measuring ITU-T G.655 fiber.
A-8
(3) OTDR main unit (MW9076D)
Item
Standard
Remarks
• Waveform storage:
Other functions
Analysis format, Standard (GR-196-CORE)
format, Standard.V2 (SR-4731) format
• Printout: Centronics
• Continuous measurement:
Wavelength switching, waveform storage
A series of operations such as print-out can be
performed with a single key stroke
• Relative distance setting (zero cursor setting)
• Waveform comparison
• Calendar function
• Distance unit setting: km, kf, mi, m, f
• Title entry: 32 characters
• Battery indication
Laser safety
21 CFR Class 1, IEC Pub60825-1 Class 1
Power supply
Power is supplied from the MU250000A display unit
Refer to the specifications of MU250000A.
Power consumption
35W at max. (when charged), Standard 4W
Including MU250000A
power consumption
Continuous battery
6 h (typical) (CGR-B/802D)
Backlight low,
operation
7 h (typical) (CGR-B/802E)
measurement not executed
Dimension
194H × 290W × 77D mm
MW9076D only
194H × 280W × 122D mm
Including MU250000A
3.1 kg or less (MW9076D only)
Mass
5.7 kg or less (including MU250000A, battery pack)
Environmental conditions
Operating temperature,
−10 to +40 °C, ≤85 %
No condensation
humidity
Storage temperature,
−20 to +60 °C, ≤85 %
Vibration
Conforms to MIL-T-28800E Class 3
Dust-proof
MIL-T-28800E
Water-proof
MIL-T-28800E
EMC
EN 61326-1: 2006 (Class A)
Emission
Immunity
Appendix Appendix
humidity
EN 61000-3-2: 2006 (Class A equipment)
EN 61326-1: 2006 (Table 2)
A-9
Appendix A Specifications
(4) OTDR main unit (MW9076D1)
Item
Standard
Remarks
Model name, unit name
MW9076D1 SMF 1.31/1.45/1.55/1.625 µm OTDR
Wavelength
1310/1450/1550/1625 ±3 nm
Fiber under test
10/125 µm single mode fiber (ITU-T G.652)
Optical connector
• FC
: Option 37
• SC
: Option 40
• DIN
: Option 39
The connectors can be
• HMS-10/A
: Option 43
replaced by the user
• ST
: Option 38
At 25 °C Pulse width : 1 µs
Install one of them.
PC type
Automatic measurement *1
Measurement items
Total loss and Total return loss or Average loss
Distance, splice loss, return loss, and reflectance of
each event (Table display)
Threshold value
Splice loss
0.01 to 9.99 dB (0.01 dB increments)
Return loss
20 to 60 dB (0.1 dB increment)
Far end of fiber
1 to 99 dB (1 dB increment)
Detected events
Up to 99
Auto setting
Distance range, pulse width, number of times of
averaging (time)
Measurement time
Within 60 seconds
Connection check
Check the connection status of mouth connector.
Communication light check
Check for communication light in the test optical fiber.
At Full Auto measurement
Manual measurement
Measurement items
Loss and distance between any two points, loss per
unit length between two points, splice loss, return
loss or reflectance, total return loss
Real time sweeping
Sweeping time: 0.1 to 0.2 seconds or less
At Quick mode
*1 Automatic measurement is a supporting function which enables to operate easier, it doesn't assure results. As
there is a case of miss detection, check the waveform as well.
A-10
(4) OTDR main unit (MW9076D1)
Item
Standard
Remarks
IOR = 1.500000
Distance range
1/2.5/5/10/25/50/100/200/250/400 km
Pulse width
10/20/50/100/500/1000/2000/4000/10000/20000 ns
Dynamic range (SNR=1)
34.5/33.5/32.5/30.0 dB (1.31/1.45/1.55/1.625 µm)
At 25 °C, 20 µs
≤25 m
Pulse width 50 ns
Dead zone
Back-scattered light
Return loss 40 dB
Deviation: ±0.1 dB
≤3 m
Pulse width 10 ns
Marker resolution
0.05 to 800 m
IOR = 1.500000
Sampling resolution
0.05 to 80 m
IOR = 1.500000
Fresnel reflection
∗2
Number of sampling points
Quick mode
5001 or 6251
Normal mode
20001 or 25001
High mode
40001 or 50001
Vertical scale
0.25, 0.5, 1, 2.5, 5, 10, 15 dB/div
15 dB/div is indicated
only at Auto and Full
Auto measurement
IOR Setting
1.400000 to 1.699999 (0.000001 steps)
Distance measurement
±0.1 m ±3 × measured distance × 10–5 ± marker
accuracy
resolution
* Uncertainty due to the index of refraction is excluded
Loss measurement accuracy
±0.05 dB/dB or ± 0.1 dB (whichever the greater)
Return loss measurement
±2 dB
accuracy
Optical loss measurement
None
light source
Chromatic dispersion
Wavelength range
Wavelength 1.55 µm
measurement function
1300 to 1660 nm
SMF 25 km
Wavelength accuracy
Appendix Appendix
± 0.5 nm*3 (typical)
Zero-dispersion repeatability
± 0.6 nm*4 (typical)
Dispersion repeatability
± 0.05 (ps/nm.km)*4 (typical)
Dynamic range
30 dB (4% Fresnel,typical)
*2 Either value is automatically selected in each mode, depending on the distance range.
*3 Compared value with internal wavelength data at chromatic dispersion measurement
*4 Measured with 25 km of 1.3 µm zero-dispension fiber. Not an error from absolute value but repeatability of
measured results. Dispersion repeatability is the value of 1.55 µm wavelength. Contact Anritsu in case of
measuring ITU-T G.655 fiber.
A-11
Appendix A Specifications
Item
Other functions
Standard
Remarks
• Waveform storage:
Analysis format, Standard (GR-196-CORE)
format, Standard.V2 (SR-4731) format
• Printout: Centronics
• Continuous measurement:
Wavelength switching, waveform storage
A series of operations such as print-out can be
performed with a single key stroke
• Relative distance setting (zero cursor setting)
• Waveform comparison
• Calendar function
• Distance unit setting: km, kf, mi, m, f
• Title entry: 32 characters
• Battery indication
Laser safety
21 CFR Class 1, IEC Pub60825-1 Class 1
Power supply
Power is supplied from the MU250000A display unit
Refer to the specifications of MU250000A.
Power consumption
35W at max. (when charged), Standard 4W
Including MU250000A
power consumption
Continuous battery
6 h (typical) (CGR-B/802D)
Backlight low,
operation
7 h (typical) (CGR-B/802E)
measurement not executed
Dimension
194H × 290W × 77D mm
MW9076D1 only
194H × 280W × 122D mm
Including MU250000A
3.1 kg or less (MW9076D1 only)
Mass
5.7 kg or less (including MU250000A, battery pack)
Environmental conditions
Operating temperature,
−10 to +40 °C, ≤85 %
humidity
Storage temperature,
−20 to +60 °C, ≤85 %
humidity
Vibration
Conforms to MIL-T-28800E Class 3
Dust-proof
MIL-T-28800E
Water-proof
MIL-T-28800E
EMC
EN 61326-1: 2006 (Class A)
Emission
Immunity
A-12
EN 61000-3-2: 2006 (Class A equipment)
EN 61326-1: 2006 (Table 2)
No condensation
(5) OTDR main unit (MW9076J)
(5) OTDR main unit (MW9076J)
Item
Standard
Model name, unit name
MW9076J GIF 0.85 µm OTDR
Wavelength
850 ± 30 nm
Remarks
At 25 °C
Pulse width: 100 ns
*2
Fiber under test
62.5/125 m multi-mode fiber
Optical connector
• FC
: Option 37
• ST
: Option 38
• DIN
: Option 39
The connectors can be
• SC
: Option 40
replaced by the user
Install one of them
PC type
Automatic measurement *1
Measurement items
Total loss and total return loss
Distance, splice loss, return loss, and reflectance of
each event
(Table display)
Threshold value
0.01 to 9.99 dB (0.01 dB increments)
Splice loss
20 to 60 dB (0.1 dB increment)
Return loss
1 to 99 dB (1 dB increment)
Far end of fiber
Up to 99
Detected events
Distance range, pulse width, number of times of
Auto setting
averaging (time)
Measurement time
Within 60 seconds
Connection check
Check the connection status of the light source
At Full Auto measurement
connector
Communication light check
Check for communication light in the test optical fiber.
Manual measurement
Measurement items
Loss and distance between any two points, loss per
unit length between two points, splice loss, return
Sweeping time: 0.1 to 0.2 seconds or less
At Quick mode
*1 Automatic measurement is a supporting function which enables to operate easier, it doesn't assure results. As
there is a case of miss detection, check the waveform as well.
*2 This specification is defined with the GI fiber of Core diameter: 62.5 ± 3 µm, NA: 0.275±0.015, Loss: ≤ 3.2/
0.9 [dB/km] (Wavelength 0.85/1.3 µm).
When a 50/125 µm optical fiber is used, the dynamic range becomes narrower by approximately 3 dB.
A-13
Appendix Appendix
loss or reflectance, total return loss
Real time sweeping
Appendix A Specifications
Item
Standard
Remarks
Distance range
1/2.5/5/10/25/50/100 km
Pulse width
10/20/50/100 ns
Dynamic range (SNR=1)
21 dB
At 25°C, 100 ns
≤7 m
Pulse width: 10 ns
IOR = 1.500000
Dead zone
Back-scattered light
Return loss: 30 dB
Deviation: ± 0.5 dB
≤50 m
Deviation: ± 0.1 dB
≤2 m
Pulse width: 10 ns
Marker resolution
0.05 to 200 m
IOR = 1.500000
Sampling resolution
0.05 to 20 m
IOR = 1.500000
Fresnel reflection
∗3
Number of sampling points
Quick mode
5001 or 6251
Normal mode
20001 or 25001
High mode
40001 or 50001
Vertical scale
0.25, 0.5, 1, 2.5, 5, 10, 15 dB/div
15 dB/div is indicated
only at Auto and Full
Auto measurement
IOR Setting
1.400000 to 1.699999 (0.000001 steps)
Distance measurement
±1 m ±3 × measured distance × 10−5 ± marker
accuracy
resolution
* Uncertainty due to the index of refraction is excluded
Loss measurement accuracy
±0.05 dB/dB or ± 0.1 dB (whichever the greater)
(linearity)
Return loss measurement
±4 dB
accuracy
Other functions
• Waveform storage:
Analysis format, Standard (GR-196-CORE)
format, Standard.V2 (SR-4731) format
• Printout: Centronics
• Continuous measurement:
Wavelength switching, waveform storage
A series of operations such as print-out can be
performed with a single key stroke
• Relative distance setting (zero cursor setting)
• Waveform comparison
• Calendar function
• Distance unit setting: m, km, f, kf, mi
• Title entry: 32 characters
• Battery indication
*3 Either value is automatically selected in each mode, depending on the distance range.
A-14
(5) OTDR main unit (MW9076J)
Item
Standard
Laser safety
21CFRClass 1, IEC Pub60825-1Class 1
Power supply
Power is supplied from the MU250000A display
Remarks
unit.
Refer to the specifications of MU250000A.
Power consumption
35 W max. (when charged), Standard 4 W
Including MU250000A
power consumption
Continuous battery
6 h (typical) (CGR-B/802D)
Backlight low,
operation
7 h (typical) (CGR-B/802E)
measurement not executed
Dimension
194 (H) × 290 (W) × 30 (D) mm
MW9076J only
194 (H) × 290 (W) × 75 (D) mm
Including MU250000A
Mass
1.4 kg or less (MW9076J only)
4.0 kg or less (including MU250000A, battery pack)
Environmental conditions
Operating temperature,
−10 to +40 °C, ≤85 %
No condensation
humidity
Storage temperature,
−20 to +60 °C, ≤85 %
humidity
Vibration
Conforms to MIL-T-28800E Class 3
Dust-proof
MIL-T-28800E
Water-proof
MIL-T-28800E
EMC
EN 61326-1: 2006 (Class A)
Immunity
EN 61000-3-2: 2006 (Class A equipment)
EN 61326-1: 2006 (Table 2)
Appendix Appendix
Emission
A-15
Appendix A Specifications
(6) OTDR main unit (MW9076K)
Item
Standard
Remarks
Model name, unit name
MW9076K GIF 0.85/1.3 µm OTDR
Wavelength
850/1300 ± 30 nm
Fiber under test
62.5/125 µm multi-mode fiber
Optical connector
• FC
: Option 37
• ST
: Option 38
• DIN
: Option 39
The connectors can be
• SC
: Option 40
replaced by the user.
At 25 °C
Pulse width: 100 ns
*2
Install one of them
PC type
Automatic measurement *1
Measurement items
Total loss and total return loss or Average loss
Distance, splice loss, return loss, and reflectance of
each event
(Table display)
Threshold value
0.01 to 9.99 dB (0.01 dB increments)
Splice loss
20 to 60 dB (0.1 dB increment)
Return loss
1 to 99 dB (1 dB increment)
Far end of fiber
Up to 99
Detected events
Distance range, pulse width, number of times of
Auto setting
averaging (time)
Measurement time
Within 60 seconds
Connection check
Check the connection status of the light source
At Full Auto measurement
connector
Communication light check
Check for communication light in the test optical fiber.
Manual measurement
Measurement items
Loss and distance between any two points, loss per
unit length between two points, splice loss, return
loss or reflectance, total return loss
Real time sweeping
Sweeping time: 0.1 to 0.2 seconds or less
At Quick mode
*1 Automatic measurement is a supporting function which enables to operate easier, it doesn't assure results. As
there is a case of miss detection, check the waveform as well.
*2 This specification is defined with the GI fiber of Core diameter: 62.5 ± 3 µm, NA: 0.275±0.015, Loss: ≤ 3.2/
0.9 [dB/km] (Wavelength 0.85/1.3 µm).
When a 50/125 µm optical fiber is used, the dynamic range becomes narrower by approximately 3 dB.
A-16
(6) OTDR main unit (MW9076K)
Item
Standard
Remarks
Distance range
1/2.5/5/10/25/50/100 km
IOR = 1.500000
Pulse width
10/20/50/100/500/1000 ns
500 ns, 1 µs is only for
wavelength 1.3 µm
Dynamic range
21/25 dB
(SNR=1)
0.85 µm at 25 ºC
Pulse width 100 ns
Pulse width 1 µs at 1.3 µm
Dead zone
Back-scattered light
≤7/10 m (850 nm/1300 nm)
Pulse width: 10 ns
Return loss: 30 dB
Deviation: ± 0.5 dB
≤50 m
Deviation: ± 0.1 dB
≤2 m
Pulse width: 10 ns
Marker resolution
0.05 to 200 m
IOR = 1.500000
Sampling resolution
0.05 to 20 m
IOR = 1.500000
Fresnel reflection
Number of sampling points
*3
Quick mode
5001 or 6251
Normal mode
20001 or 25001
High mode
40001 or 50001
Vertical scale
0.25, 0.5, 1, 2.5, 5, 10, 15 dB/div
15 dB/div is indicated
only at Auto and Full
Auto measurement
IOR Setting
1.400000 to 1.699999 (0.000001 steps)
Distance measurement
±1 m ±3 × measured distance ± 10−5 ± marker
accuracy
resolution
* Uncertainty due to the index of refraction is excluded
Loss measurement accuracy
±0.05 dB/dB or ± 0.1 dB (whichever the greater)
(linearity)
Return loss measurement
±4 dB
accuracy
• Waveform storage:
Appendix Appendix
Other functions
Analysis format, Standard (GR-196-CORE)
format, Standard.V2 (SR-4731) format
• Printout: Centronics
• Continuous measurement:
Wavelength switching, waveform storage
A series of operations such as print-out can be
performed with a single key stroke
• Relative distance setting (zero cursor setting)
• Waveform comparison
• Calendar function
• Distance unit setting: m, km, f, kf, mi
• Title entry: 32 characters
• Battery indication
*3 Either value is automatically selected in each mode, depending on the distance range.
A-17
Appendix A Specifications
Item
Standard
Laser safety
21CFRClass 1, IEC Pub60825-1Class 1
Power supply
Power is supplied from the MU250000A display
Remarks
unit.
Refer to the specifications of MU250000A.
Power consumption
35 W max. (when charged), Standard 4 W
Including MU250000A
power consumption
Continuous battery
6 h (typical) (CGR-B/802D)
Backlight low,
operation
7 h (typical) (CGR-B/802E)
measurement not executed
Dimension
194 (H) × 290 (W) × 30 (D) mm
MW9076K only
194 (H) × 290 (W) × 75 (D) mm
Including MU250000A
Mass
1.4 kg or less (MW9076K only)
4.0 kg or less (including MU250000A, battery pack)
Environmental conditions
Operating temperature,
−10 to +40 °C, ≤85 %
humidity
Storage temperature,
−20 to +60 °C, ≤85 %
humidity
Vibration
Conforms to MIL-T-28800E Class 3
Dust-proof
MIL-T-28800E
Water-proof
MIL-T-28800E
EMC
EN 61326-1: 2006 (Class A)
Emission
Immunity
A-18
EN 61000-3-2: 2006 (Class A equipment)
EN 61326-1: 2006 (Table 2)
No condensation
(7) Display unit (MU250000A, MU250000A1, MU250000A4)
(7) Display unit (MU250000A, MU250000A1, MU250000A4)
Item
Standard
Model name, unit name
MU250000A/A1/A4 Display Unit
Monitor
8.4-inch color TFT-LCD
Remarks
MU250000A
(640 × 480, transmission type, with back light)
7.2-inch color STN-LCD
MU250000A1
(640 × 480, semi-transmission type, with back light)
7.8-inch color STN-LCD
MU250000A4
(640 × 480, reflection type, with front light)
Interface
RS232C-1 (115.2 kbit/s max.), Connector : D-sub 9p
Serial
RS232C-2 (57.6 kbit/s max.), Connector : Mini DIN 8p
Printer
8-bit parallel interface, Connector : D-sub 25p
Keyboard
IBM US ENGLISH (101 keys) 106 ready
Centronics-compatible
Connector : Mini DIN 6p
VGA output
Connector : Mini DIN 10p
DC : 10 to 26.4 V
Power supply
AC (Rating) : 100 to 240 V, 50/60 Hz, 50 VA max
(When special AC adapter is used)
Battery:
CGR-B/802D or CGR-B/802E lithium
ion battery pack is available (installed in
OTDR main unit)
Power consumption
35 W max.
Dimension
194 (H) × 290 (W) × 45 (D) mm
Mass
2.2 kg or less
Environmental conditions
Subject to limitations of memory card specification when
memory card is used and subject to environmental
conditions of AC adapter if AC adapter is used.
Operating temperature,
When FDD is not operated
−10 to +40 °C, ≤85 %
No condensation
When FDD is operated
+5 to +40 °C, ≤80 %
No condensation
Storage temperature,
Appendix Appendix
humidity
−20 to +60 °C, ≤85 %
humidity
Vibration
Conforming to MIL-T-28800E Class 3
Dust-proof
MIL-T-28800E
Water-proof
MIL-T-28800E
EMC
Emission
Immunity
EN 61326-1: 2006 (Class A)
EN 61000-3-2: 2006 (Class A equipment)
EN 61326-1: 2006 (Table 2)
A-19
Appendix A Specifications
(8) Battery pack (CGR-B/802D, CGR-B/802E)
Item
Standard
Remarks
Battery type
Li ion secondary battery
Voltage, capacity
14.4 V, 2550 mAh (36.72 Wh)
CGR-B/802D
14.4 V, 3400 mAh (48.96 Wh)
CGR-B/802E
Continuous operation time
Refer to the specifications of the MW9076 OTDR
main unit.
Charging time
3 hours or less
Dimension
98.5 (H) × 134.5 (W) × 20.5 (D) mm
Mass
390 g or less
CGR-B/802D
420 g or less
CGR-B/802E
The battery pack is a consumable item.
(9) AC adapter
Item
Standard
AC nominal input
AC100 to 240 V, 50/60 Hz
DC nominal input
DC24 V, 2.5 A
Safety standard
UL, CSA, TÜV/GS, CE, PSE, CB, NORDIC
Remarks
Environmental conditions
Operating temperature,
0 to +40 °C, ≤80 %
humidity
Storage temperature,
—20 to +80 °C, ≤95 %
humidity
(10) Visible LD (MW9076B/B1/C/D/D1/J/K-01)
Item
Standard
Central wavelength
635 ± 15 nm
Optical output
−3 ± 1.5 dBm
Output optical fiber
10/125 µm single mode (ITU-T G.652)
Optical connector
FC/SC/ST/DIN/DIAMOND (HMS-10/A)
Optical safety
IEC Class 1M, 21CFR Class 2
Environmental conditions
Same as the MW9076 OTDR main unit
A-20
Remarks
At 25 °C
Replaceable
(13) Optical channel selector unit (MU960001A, MU960002A)
(11) Optical power meter (MW9076B/B1/C-02)
Item
Standard
Applicable optical fiber
10/125 mm single mode (ITU-T G.652)
Optical connector
FC/SC/ST/DIN/DIAMOND (HMS-10/A)
Wavelength range
1.2 to 1.7 µm
Measurement range
+3 to −70 dBm (Continuous light)
Remarks
Replaceable
0 to −75 dBm (Modulated light)
Measurement accuracy
±5 %
−10 dBm, Continuous
Environmental conditions
Same as the MW9076 OTDR main unit
light, 1.31/1.55 µm
(12) High input optical power meter (MW9076B/B1/C-03)
Item
Standard
Applicable optical fiber
10/125 mm single mode (ITU-T G.652)
Optical connector
FC/SC/ST/DIN/DIAMOND (HMS-10/A)
Wavelength range
1.2 to 1.7 µm
Measurement range
+23 to −50 dBm (Continuous light)
Remarks
Replaceable
+20 to −55 dBm (Modulated light)
Measurement accuracy
±5 %
Environmental conditions
Same as the MW9076 OTDR main unit
−10 dBm, Continuous
light, 1.31/1.55 µm
(13) Optical channel selector unit (MU960001A, MU960002A)
Item
Configuration
Standard
Remarks
1 × 4 (MU960001A)
1 × 8 (MU960002A)
1.2 to 1.65 µm
Optical fiber
10/125 µm single mode (ITU-T G.652)
Optical connector
FC/SC/ST/DIN/DIAMOND (HMS-10/A)
Insertion loss
2.5 dB or less (MU960001A)
Replaceable
Appendix Appendix
Wavelength range
4.5 dB or less (MU960002A)
Environmental conditions
Same as the MW9076 OTDR main unit
Size
194 (H) × 290 (W) × 47 (D) mm
Mass
1.5 kg or less (MU960001A)
2.0 kg or less (MU960002A)
A-21
Appendix A Specifications
(14) Peripherals and parts
Item
AC adapter
Car charger
Lithium ion battery pack
MW9076 Series
Operation Manual
MW9076 Series Serial
Interface Operation Manual
Printer
Thermal Printer
AC adapter
CF Card
Printer connection cable
FC type adapter
Optical fiber cable with FCPC at both ends for SM fiber
FDDI-FC conversion cable
FDDI-ST conversion cable
FDDI-SC conversion cable
Soft carrying case
Soft carrying case
Hard carrying case
Replaceable FC optical
connector
Replaceable ST optical
connector
Replaceable DIN optical
connector
Replaceable HMS-10/A
optical connector
Replaceable SC optical
connector
Serial interface cable
Serial interface cable
VGA conversion cable
Keyboard (PS/2)
Plotting paper
Printer paper
Ferrule cleaner
Replacement real for ferrule
cleaner
Cleaner for optical adapter
Specification
AC 100 to 240 V 50/60 Hz
Adapter for the car battery, DC 10 to 15 V
Model name
Z0695
SPC60-3020
Z0619
W1659AE
Thermal printer, AC100 V, 0 to 40 °C
Operates only with AC adapter, printing width 72 mm,
printing speed approximately 13 s (manual measurement
result with header) , 0 to +40 °C,
119(W)×77(H)×174(D)mm
For BL-80R2, AC100 to 240 V
PC Card adapter is also supplied, 256 MB
Centronics-compatible
W1660AE
DPU-414-31B
BL-80R2
BL-100W
ANR-CFX40T256P
FC-AP
J0635 *1
Handbag type (440 W × 310 H × 110 D)
Handbag type (430 W × 300 H × 170 D)
Main unit, unit and thermal printer can be
accommodated.
J0699 *1
J0700 *1
J0701 *1
B0442
Z0435
Z0436
J0617B
J0618D
J0618E
J0618F
J0619B
For Ferrule cleaner (6pcs/set)
J0654A
J0977
J0978
Z0321A
TP411-28CL
BL-80-30
Z0282
Z0283
Stick type (200/set)
Z0284
For remote control with IBM-PC or J-3100
For connecting optical channel selector
External monitor connecting cable
For DPU414 thermal printer (10 rolls/pack)
For BL-80R2(10rolls/set)
Note:
*1 Specify A to C at the mark according to the length of the cable.
(A: 1 m, B: 2 m, C: 3 m)
A-22 .
Appendix B Least Square Linear Approximation Method
When splice loss is measured, assume two lines, L1 and L2, from the measurement data and obtain the loss as shown in the figure below.
L1
L1
×1
×1
×2
×3
×2
L2
×3
×4
L2
×4
There are two methods for determining these lines: the LSA and 2PA methods.
Of these methods, this section explains the LSA (Least Square Approximation)
method.
The Least Square Approximation method obtains a straight line such that the
variation of distances from all the measurement data points that exist between the
markers to the straight line is a minimum.
y
(x1, y1)
(xi, yi)
δi=yi–(a+bxi)
l=y=a+bx
a+bxi
x
As shown in the figure above, let see this the straight line L from which the variation of distances from n data points (x1, y1), (x2, y2), ... (xn, yn) becomes minimum
be y = a + bx. The straight line L is determined by finding the deviation from each
point (δ1, δ2, δ3, ...) to the straight line L as a value including the variables a and
b and finding the variables a and b so that the sum E of the squares of the deviation
of points δi becomes minimum.
δi = yi – (a + bxi)
n
2
δi = y 1 – a – b x 1
E=
2
+ y 2 – a – bx 2
2
+ … + y n – a – bx n
2
i=1
In the above equation, the necessary and sufficient condition to minimize E is:
= 0,
=0
When this equation is solved, the variables a and b can be found as shown below.
n
n
∑(xiyi)
y ∑ (xi)2 x∑ (xiyi)
a=
i=1
∑ (xi)2 n (x)2
i=1
n
where,
,
b=
nx y
i=1
n
∑ (xi)2
n (x)2
i=1
n
x = 1n ∑ (xi), y = 1
(yi)
n∑
i=1
i=1
B-1
Appendix Appendix
(xn, yn)
Appendix B Least Square Linear Approximation Method
B-2.
Appendix C Splice Loss Measurement Principle
The trace waveform at the splice point should be displayed as indicated by the
dotted line in the figure below, but is actually displayed as indicated by the solid
line. The reason why section L is generated is because the waveform inputted to
the OTDR shows a sharp falling edge at the splice point so that the circuit cannot
respond correctly. Section L increases as the pulse width increases.
Splice Point
L
Therefore, the splice loss cannot be measured correctly in the Loss mode. In the
Splice & Return Loss mode, two markers are set on each side of the splice point.
The splice loss is calculated as shown below.
Draw Lines L1 and L2 as shown below. The part of the straight line immediately
after the splice point is the forward projection of straight line L2. The splice loss
is found by dropping a perpendicular from the splice point to this projection of L2
and measuring the level difference between the splice point and the intersection.
Splice Point
L1
×
Splice Loss
×
L
L2
×
Appendix Appendix
×
C-1
Appendix C Splice Loss Measurement Principle
C-2.
Appendix D Return Loss Measurement Principle
The return loss R is found from the following equation.
R = – 10log 10 bsl + 10log 10 1 0 L/5 – 1
W
bsl = S · α R · V ·
2
N1 2 – N2 2
S=K·
N1 2
C
V=
Ne
W (sec): Currently set pulse width
L: Difference of levels between * and ∇ markers
BSL = 10 log10bsl: Back-scattered light level
S: Back-scattered coefficient
αR: Rayleigh scattering loss (Np/m)
= 0.23026 × 10–3 × RSL
RSL: Rayleigh scattering loss (dB/km)
V: Group velocity in optical fiber
K: Available constant of optical fiber
N1: Index of refraction of optical fiber core
N2: Index of refraction of optical fiber cladding
Ne: Effective group index of refraction of optical fiber
Appendix Appendix
C (m/s): Speed of light (3 × 108)
D-1
Appendix D Return Loss Measurement Principle
D-2.
Appendix E Total Return Loss Measurement Principle
Use the following equation to obtain the total return loss, or TRL, in dB.
ER
TRL = – 10log 10
Ein
∞
= –10log 10
∫ 0 P t dt
P0W
∞
= –10log 10
bsl ∫ 0 P′ t dt
W
where, P' t =
P t
P o bsl
∞
= –10log 10 bsl + 10log 10 W – 10log 10 ∫ 0 P' t dt
ER: Reflected light energy
Ein: Incident light energy
P (t) : OTDR measurement power
P0 : Incident light pulse peak power at t = 0
W: Incident light pulse width
10log10bsl: Back-scattered light level
∞
∫ 0 P' t dt : Measured waveform normalized and integrated over the back-scattered light intensity at the incident end
Reference:
bsl is determined according to the fiber, wavelength, and pulse width.
Typical values for 1.3 µm single mode optical fiber are shown below.
λ = 1.31 µm
λ = 1.55 µm
100 ns
–60
–62.5
1 µs
–50
–52.5
10 µs
–40
–42.5
Appendix Appendix
Back-scatter level (dB)
Pulse width
E-1
Appendix E Total Return Loss Measurement Principle
E-2.
Appendix F Settings at Factory Shipment
The DFN file is factory-set as shown below.
System
Channel
OTDR
None
Measurement mode
Full Auto
Event
Wavelength
Auto Search
1310 nm (MW9076B/B1/C/D/D1)
Distance range
850 nm (MW9076J/K)
Auto
Pulse Width
Attenuator
Auto
Auto (Available OTDR main unit only)
IOR
Average Setting item
Depend on OTDR main units
Auto
Backscatter level
Sampling data points
0.00 dB
QUICK
Sampling resolution
Sampling range
Auto
Full scale
Event threshold
Splice Loss
0.30 dB
Return Loss
Fiber end
25.0 dB
5.0 dB
Off
Splice Loss
Connection Loss
0.50 dB
0.20 dB
Return Loss
Fiber Loss
25.0 dB
0.50 dB/km
Total Loss
Total Return Loss
20.0 dB
25.0 dB
Average Loss
Connection check
0.50 dB/km
OFF
Visible LD
Communication check
OFF
OFF
Title
Header
Anritsu
None
V-Scale
H-Scale
10 dB/div
Full scale
V-Shift
H-Shift
14 dB
0 km
Full View
Real Time / Average
OFF
Average
Event Comment
Landmark
None
None
Optical Switch
None
Appendix Appendix
Warning On/Off
Warning level
F-1
Appendix F Settings at Factory Shipment
F-2.
H-Offset
File Type
0 km
Standard
File Compress
Media
Off
INT Memory
Directory
Printer
Root
DPU-414
Print Format Printer
Date
Waveform & Data
On
Date format
Time
Y-M-D
On
Auto power off
Auto backlight off
15 minutes
5 minutes
Sound
Distance unit
On
km
Appendix G List of Recommended Printers
The printers listed below have undergone a performance test by our company.
Seiko Instruments DPU 412
Canon BJC50V and BJC400J
Epson MJ-800C
HP Deskjet 500/500C
Appendix Appendix
Sanei Electric Inc. BL-80R2
G-1
Appendix G List of Recommended Printers
G-2.
Horizontal
scale
[m/div.]
10
10
10
10
10
10
10
10
5001
10
20
50
100
–
–
–
–
2
2
2
2
2
2
50
25001
2
5
1
1
1
1
1
1
50001
0.05
0.05
0.1
0.2
0.2
0.2
0.2
0.5
1
2
–
–
–
–
1
20001 No setting
5001
Appendix Appendix
1
2.5
5
10
25
50
100
250
500
1k
2.5 k
5k
10 k
20 k
25 k
40 k
Distance range [km]
Sampling points
Horizontal
scale
[m/div.]
1
2.5
5
10
25
50
100
250
500
1k
2.5 k
Distance range [km]
Sampling points
20
20
20
20
20
20
20
20
20
5001
0.5
0.5
0.5
0.5
5001
0.1
0.2
20
50
100
200
–
–
–
5
5
5
5
5
5
5
5
10
100
20001
0.5
1
2
5
–
–
–
0.1
0.1
2.5
25001
2
2
2
2
2
2
2
50001
0.05
0.05
50001
5
25001
50001
0.2
0.5
200
20001
1
2
5
10
–
–
0.2
0.2
0.2
40001
0.1
0.1
0.1
40
40
40
40
40
40
40
40
40
40
50
100
200
400
–
–
10
10
10
10
10
10
10
10
10
20
5
5
5
5
5
5
5
5
M a r ke r r e s o l u t i o n [ m ]
5001
1
1
1
1
1
M a r ke r r e s o l u t i o n [ m ]
5001
40
40
40
40
40
40
40
40
40
40
6250
2
2
2
2
2
2
5001
0.5
1
50
100
200
400
500
–
10
10
10
10
10
10
10
10
10
20
250
25001
2
5
10
20
–
0.5
0.5
0.5
0.5
10
20001
5
5
5
5
5
5
5
5
50001
0.2
0.2
0.2
0.2
50001
80
80
80
80
80
80
80
80
80
80
80
5001
5
5
5
5
5
5
5
5001
100
200
400
500
800
20
20
20
20
20
20
20
20
20
1
2
20
50
400
20001
5
10
20
50
1
1
1
1
1
25
25001
10
10
10
10
10
10
10
10
10
40001
0.5
0.5
0.5
0.5
0.5
50001
Appendix H Marker Resolution
H-1
Appendix H Marker Resolution
H-2.
Appendix I Simple OTDR Operation Method
Connect the power cord, AC adapter and OTDR unit Or attach a charged battery.
Power On
Flip the switch located at the left-hand side of the main unit to | to
turn on the unit and flip it to to turn off the unit.
Self test
This is performed automatically.
To the Setup Screen (the screen on which to set up a range of measurement conditions)
This is performed automatically.
Full Auto measurement:
“Wavelength” setting
Setting of measurement conditions: “Auto Measurement”, “Wavelength”, “Pulse
Width”, “Distance Range”, “Threshold value” and “Other”
Almost all the setting conditions
are judged by the machine.
Measurement
Select an item to be set by the rotary knob or the arrow keys then press
the Sel button to display set values. Position the cursor on the desired
value and press Sel again.
Saving and reading
Printing
When saving data on a FD or
reading data from a FD
START
Averaging (automatic)
File
The event table is automatically
displayed after averaging.
File format
Select analysis and press Sel again
Sel
Storage media
NO
F3
Automatically enlarges the event point
selected by the marker.
Saving
YES
main unit twice
The markers, one to four, are
automatically set
Select by up and down arrows and
set the position by using the left and
right arrows
Reading
Marker setting
Set * at the event occurrence point
by using the left and right arrows or
the rotary knob
Press F3 located at the right of the
YES
Sel
Sel
Select characters using the
rotary knob and move the cursor
using the left and right arrows.
Select * by up and down arrows and
set the position by left and right arrows
Set the marker at the peak position
of Fresnel reflection by using the left
and right arrows or the rotary knob.
The amount of reflection can be
obtained from – *.
File name
Title
The marker was automatically set
through the procedures indicated
above. However, pressing Manual
enables manual setting of six
markers.
Above Start at the bottom right of
the main frame
File
Position the cursor using the up
and down arrows.
Select FD and press Sel again
Select characters using the
rotary knob and move the cursor
using the left and right arrows
Manual (the 5th column on the right) F5
Save
Sel
Menu
Execute data save
F1
Read data from a file
F2
Storage media
F4
FD
Printing
F3
Format
Sel
Position the cursor using the up
and down arrows.
Waveform & data
Sel
Position the cursor using the up
and down arrows.
Execute printing
F1
F1
Select a file
Select a file using the up and
down arrows.
Execute data reading F1
Print
NO
YES
Perform a measurement again
NO
Power Off
NO
YES
The switch is located at the
left side of the main unit.
Remove the power cord, AC adapter
Return to the measurement
Completion
I-1
Appendix Appendix
Event table display (measurement results)
Auto zoom
Turn the printer on.
Position the cursor using the up
and down arrows
F1
Save data into a file
Press the stop button to stop averaging
and display the measurement results.
Set the marker manually.
Connect a printer.
Menu
Above Start at the bottom right of
the main frame
The button at the bottom right of the
main unit
Appendix I Simple OTDR Operation Method
Operation for MW9076D/D1 Wavelength Dispersion Measurement (Quick Reference Chart)
Connect the power cable, AC adapter and OTDR unit. Or attach a charged battery.
Power switch is on the left of the main unit.
ON: |, OFF:
Automatically displayed
Power on
Setup screen (for various measurement conditions)
Change the measurement mode from OTDR to CD.
Measurement
Full-auto measurement
Automatic measurement: Set conditions such as "wavelength," "pulse width,"
Most conditions are automatically set.
Select a setting item using rotary knob or arrow keys.
Then press Sel button to display setting value.
Move cursor onto desired value, and then press Sel again.
Approximate value selection
(SMF or DSF or ANY)
Saving/Reading
Select according to fiber-type to be measured.
When saving data to or reading data from an FD:
Select the reference wavelength
Menu
Wavelength determines the fiber length.
Normally, IOR selects known wavelength.
Press
Start
File
File write
File format
Far end confirmation (visual confirmation)
Move the marker manually.
Sel
F3
Format
Sel
Sel
Move the cursor using up/down keys.
Waveform and data Sel
Move the cursor using up/down keys.
Select characters using rotary knob.
Move cursor using up/down keys.
Execute printing
Execute writing F1
NO
File read
Can Fresnel for each
YES wavelength be confirmed?
NO
When embedded
in noise, etc.
Set the wavelength Attach a full-reflection
fiber and perform
to 3 wavelengths
measurement again.
Press F3 (CD calculation)
F2
Memory media F4
Reading
NO
File name
Title
Set PW, ATT and AVE to
perform wavelength measurement.
Print
Select "FD" and press [Sel] key again.
Select characters using rotary knob.
Move cursor using up/down keys.
Fresnel measurement
Set the marker manually.
Move the cursor using up/down keys.
Memory media Sel
Press F1 (CD measurement).
Is the marker on the Fresnel
for each wavelength?
File
Sel
Select "Analysis" and press [Sel] key again.
Saving
NO
Menu
F1
At bottom right of unit, above START.
Pressing F2 switches the measuring
wavelength (for automatic measurement only).
Is the marker on the far end?
Turn on printer
Move the cursor using up/down keys.
Waveform display for entire fiber
(far end measurement results)
YES
Connect printer
At bottom right of unit, above START.
Far end measurement is performed here.
YES
Printing
FD
F1
Select file
Select a file using up/down keys.
Execute reading F1
Execute CD calculation
Select approximate value and reference
wavelength and then press F1 (Execute).
CD calculation results (delay, dispersion, slope)
Pressing F3
F4
F5
changes between
Press
(Manual F4 calculation result graphs.
measurement) on YES
the OTDR
Continue measurement
waveform screen
for fiber with similar length?
. F2
Ex: Tape core cable
Mode is fixed.
NO
Press Start
YES
Save
NO
I-2 .
Print
YES
Retry measurement
NO
NO
YES
Power off
Power switch on right of main unit.
Disconnect power code, AC adapter.
END
Return to Measurement
F1
Index
Index
21 CFR 1040.10 .................................................................................................. v
2PA (Two Point Approximation) Method .................................................... 1-14
A
Active fiber check ......................................................................................... 3-11
Adding an event ............................................................................................ 4-17
adjustment ..................................................................................................... 4-14
Analysis ........................................................................................................... 7-9
attenuator .................................................................................................. 3-7, 3-8
Auto ................................................................................................................. 3-7
Auto Backlight Off ........................................................................................ 3-17
Auto Increment Function .............................................................................. 7-25
Auto Mode ....................................................................................................... 1-4
Auto power off ................................................................................................ 1-9
Auto Search ..................................................................................................... 3-7
Automatic allocation of the marker ................................................................. 1-9
automatic waveform save ................................................................................ 1-9
Average Limit Item ......................................................................................... 3-9
Average Limit Value ....................................................................................... 3-9
Average Number ............................................................................................. 5-6
Averaging ........................................................................................................ 1-8
B
Backscatter level ............................................................................................. 3-9
Battery pack
Charging the battery pack ......................................................................... 2-8
Installing the battery pack ......................................................................... 2-6
Removing the battery pack ....................................................................... 2-7
Baud rate ....................................................................................................... 3-21
Built-in optical channel selector .................................................................... 1-11
C
Cable Code .................................................................................................... 3-14
Cable ID ........................................................................................................ 3-14
Checking the communication light ................................................................. 1-7
Chromatic Dispersion .................................................................................... 1-10
Cleaning the Floppy Disk Drive ...................................................................... 9-3
Cleaning the Optical Connector ...................................................................... 9-2
Comment ....................................................................................................... 3-14
Connecting a computer .................................................................................. 2-22
Connecting a keyboard .................................................................................. 2-24
Index-1
Index
Channel ..................................................................................................... 3-6, 5-5
Charging the battery pack ............................................................................... 2-7
Index
card ................................................................................................................ 2-11
CD ................................................................................................................... 3-6
Index
Connecting a printer ...................................................................................... 2-21
Connecting an external monitor .................................................................... 2-23
Connecting an optical channel selector ......................................................... 2-17
Connecting the AC adapter ............................................................................. 2-5
Connecting the Optical Fiber Cable .............................................................. 2-14
Connecting the Power Supply ......................................................................... 2-5
Connection .................................................................................................... 3-21
Connection check .......................................................................................... 3-11
Continuous automatic measurement ............................................................... 1-6
Continuous Printing ......................................................................................... 7-6
Copy .............................................................................................................. 7-23
Cursor Keys ..................................................................................................... 2-9
Customer .............................................................................................. 3-14, 3-31
D
Data ................................................................................................................. 7-4
Data bit .......................................................................................................... 3-21
Data Flag .............................................................................................. 3-14, 3-31
Data points ..................................................................................................... 3-10
Delete ................................................................................................... 7-13, 7-19
Deleting an event ........................................................................................... 4-20
Difference in time .......................................................................................... 3-16
Directory ............................................................................................... 4-36, 7-11
display unit ...................................................................................................... 1-2
E
Editing the event points ................................................................................... 1-8
Editing the Events ......................................................................................... 4-16
emulation mode ............................................................................................. 7-17
Entering an event comment ........................................................................... 4-22
Event ................................................................................................................ 3-7
Event Comment ............................................................................................. 3-31
Event Comment On/Off .................................................................................. 7-5
Event registration function .............................................................................. 1-8
Event Table ................................................................................................... 4-10
Event Threshold ............................................................................................ 3-12
F
Fiber End ....................................................................................................... 3-12
Fiber ID ......................................................................................................... 3-14
Fiber Loss ...................................................................................................... 3-12
File Compress ................................................................................................ 4-36
File Name ...................................................................................................... 4-36
File name ....................................................................................................... 7-13
File Type ................................................................................................ 4-36, 7-9
Index-2
Index
Fixed ................................................................................................................ 3-7
Flow Control ................................................................................................. 3-21
Format ........................................................................................................... 3-31
Full Auto ......................................................................................................... 3-7
Full Auto Mode ............................................................................................... 1-4
Function Keys ................................................................................................. 2-9
H
Header ........................................................................................................... 3-14
high resolution ................................................................................................. 1-7
high speed ........................................................................................................ 1-7
How to perform an accurate measurement .................................................... 4-28
I
Initialize ......................................................................................................... 7-22
Inserting and removing a floppy disk ............................................................ 2-16
Inserting and removing a memory card ......................................................... 2-15
Installing the battery pack ............................................................................... 2-6
Installing the OTDR main unit ...................................................................... 2-13
IOR (Index of Reflection) ............................................................................... 3-9
L
Language ....................................................................................................... 3-17
Linear approximation method ....................................................................... 4-27
Log Table ...................................................................................................... 4-32
Loss and Total Return Loss ........................................................................... 1-11
Loss and Total Return Loss Measurement .................................................... 1-11
LSA ............................................................................................................... 1-14
M
Making high resolution ................................................................................... 1-7
Manual Mode .................................................................................................. 1-5
Measurement conditions ............................................................................... 4-10
Measurement mode ......................................................................................... 3-7
Measuring the connection loss (splice) ......................................................... 4-51
Measuring the relative distance ..................................................................... 4-49
Measuring the return loss .............................................................................. 4-55
Measuring the transmission loss ................................................................... 4-54
Media .................................................................................................... 4-36, 7-10
Menu Key ........................................................................................................ 2-9
Method of entering a title .............................................................................. 3-13
Index-3
Index
Measuring the absolute distance ................................................................... 4-48
Measuring the connection loss (connector) ................................................... 4-52
Index
Measurement Parameter .................................................................................. 3-8
Measurement results ...................................................................................... 4-27
Index
Modulation ...................................................................................................... 5-5
More .............................................................................................................. 4-13
Moving an event ............................................................................................ 4-19
Moving to the Manual Measurement Screen ................................................ 4-26
N
Nameplate ...................................................................................................... 2-10
normal speed ................................................................................................... 1-7
O
OLTS (Optical Loss Test Set) measurement ................................................. 1-10
OLTS Function ................................................................................................ 5-2
Operator ................................................................................................ 3-14, 3-31
optical channel selector ................................................................................... 1-6
Optical Loss Measurement ............................................................................ 5-13
Optical Power Meter ....................................................................................... 1-2
optical power meter ......................................................................................... 5-2
Org Loc ................................................................................................ 3-14, 3-31
OTDR main unit .............................................................................................. 1-2
Owner ................................................................................................... 3-14, 3-31
P
Parity ............................................................................................................. 3-21
PCMCIA Drv1 .............................................................................................. 7-10
PCMCIA Drv2 .............................................................................................. 7-10
Power switch ................................................................................................... 2-8
Preview .......................................................................................................... 3-32
Preview mode .................................................................................................. 1-6
Print ........................................................................................................ 4-36, 7-2
Print Format ..................................................................................................... 7-4
Printing the Settings ...................................................................................... 3-26
Printing the settings ....................................................................................... 3-30
Pulse Width ..................................................................................................... 3-8
R
Range ............................................................................................................. 3-10
Range Hold ...................................................................................................... 5-7
Reading the DFN file .................................................................................... 3-26
Reading the measurement result ................................................................... 4-37
real-time .......................................................................................................... 1-8
Recall ............................................................................................................. 7-15
Reference Level ............................................................................................... 5-7
reflectance ..................................................................................................... 3-24
Reflection Measurement ............................................................................... 1-12
Reflective type ............................................................................................... 3-24
Index-4
Index
Registering and researching an event ............................................................ 4-16
Relative Distance Measurement .................................................................... 4-39
Removing the battery pack .............................................................................. 2-6
Removing the OTDR Main Unit ................................................................... 2-13
Repeat Channel ............................................................................................. 4-33
Repeat Task Function .................................................................................... 4-30
Repeat Wavelength ....................................................................................... 4-34
Replacing the Optical Connector .................................................................. 2-12
researching an event ...................................................................................... 4-21
Resolution ...................................................................................................... 3-10
Return Loss ................................................................................................... 3-12
Returning to the Event Table screen ............................................................. 4-29
Rotary Knob .................................................................................................... 2-9
S
Sample Information ....................................................................................... 3-10
Save ................................................................................................................. 7-8
Saving the DFN file ....................................................................................... 3-28
Search results ................................................................................................. 4-10
Select CH ....................................................................................................... 3-33
Select Key ....................................................................................................... 2-9
Select l ........................................................................................................... 3-33
Select the data to be printed ............................................................................ 7-4
Self-Diagnosis ................................................................................................. 9-4
Setting items .................................................................................................... 3-2
Setting the color on the screen ...................................................................... 3-25
Setting the display on the screen ................................................................... 3-23
Setting the Measurement Conditions .............................................................. 4-4
Setting the optical channel selector ............................................................... 3-22
Setting the printer .......................................................................................... 3-18
Setting the serial port ..................................................................................... 3-20
Setting the system .......................................................................................... 3-15
Setup ................................................................................................................ 7-4
Setup Screens .................................................................................................. 3-6
Standard ........................................................................................................... 7-9
Standard.V2 ..................................................................................................... 7-9
Start Key .......................................................................................................... 2-9
Starting a Measurement ................................................................................... 4-9
Status Display Lamp ....................................................................................... 2-9
Stop bit .......................................................................................................... 3-21
System ...................................................................................................... 3-6, 5-5
Index-5
Index
Splice Loss .................................................................................................... 3-12
Stand .............................................................................................................. 2-10
Index
Sort ................................................................................................................ 4-37
Sound ............................................................................................................. 3-17
Index
T
Term Loc .............................................................................................. 3-14, 3-31
Time ................................................................................................................ 3-9
Title ............................................................................................................... 3-13
Total Loss ...................................................................................................... 3-12
Total Return Loss ................................................................................. 1-11, 3-12
total return loss ................................................................................................ 3-9
Trace waveform ............................................................................................. 4-11
V
Visible LD ....................................................................................... 1-9, 3-11, 5-6
W
Warning Level ............................................................................................... 3-12
warning level ................................................................................................... 1-7
Waveform & Data ........................................................................................... 7-4
Waveform comparison .................................................................................... 1-9
Wavelength ...................................................................................................... 3-8
Wavelength for Cal ......................................................................................... 5-6
Z
zero cursor ..................................................................................................... 4-39
Index-6.