TS1_Rev.021
TereScope 1
Photonic Air Link
User Manual
MRV Communications, Inc.
URL: http://www.mrv.com
TereScope 1
September 2002
ML46508, Rev. 02
Standards Compliance
UL 1950; CSA 22.2 No 950; FCC Part 15 Class A; CE-89/336/EEC, 73/23/EEC, IP-66
MRV  Laser Safety Certification
The TereScope 1 is designed, built, and tested to be eyesafe, even if the output beams are viewed directly,
provided that no magnifying optics are used.
This product is Class 1 according to the American National Standard for Safe Use of Lasers ANSI Z136.11993 provided that there is not a reasonable probability of accidental viewing with optics in the direct path of
the beam where the TereScope 1 is installed.
This product is Class 1M according to the International Standard of the International Electrotechnical
Commision IEC 60825-1, Amendment 2, January 2001 entitled “Safety of laser products.” The following
explanatory label is applicable to these products:
LASER RADIATION
DO NOT VIEW DIRECTLY WITH OPTICAL INSTRUMENTS
(BINOCULARS OR TELESCOPES)
CLASS 1M LASER PRODUCT
This product complies with United States FDA performance standards for laser products except for
deviations pursuant to Laser Notice No. 50 as published in June, 2001, which allows for the use of the IEC
60825-1 classification standard. Under this standard, these products are Class 1M.
A ‘Declaration of Conformity’, in accordance with the above standards, has been made and is on file at
MRV.
Disclaimer
MRV reserves the right to modify the equipment at any time and in any way it sees fit in order to improve it.
MRV provides this document without any warranty of any kind, either expressed or implied, including, but
not limited to, the implied warranties of merchantability or fitness for a particular purpose.
Although much care has been taken in the preparation of this document, omissions and errors may still
exist. Therefore, the customer is advised to exercise due discretion in the use of the contents of this
document since the customer bears sole responsibility.
Trademarks
All trademarks are the property of their respective holders.
Copyright © 2002 by MRV
All rights reserved. No part of this document may be reproduced without the prior permission of MRV.
This document and the information contained herein are proprietary to MRV and are furnished to the
recipient solely for use in operating, maintaining and repairing MRV equipment. The information within may
not be utilized for any purpose except as stated herein, and may not be disclosed to third parties without
written permission from MRV. MRV reserves the right to make changes to any technical specifications in
order to improve reliability, function or design.
Document Number: ML46508
Document Revision: Rev. 02
2
Release Date: September 2002
TereScope 1
ML46508, Rev. 02
September 2002
Contents
About this Manual............................................................................. 8
Purpose ........................................................................................................... 8
Audience ......................................................................................................... 8
Qualifications................................................................................................ 8
Training ........................................................................................................ 8
Experience ................................................................................................... 8
Authorization ................................................................................................ 8
Related Documents........................................................................................ 8
Acronyms........................................................................................................ 9
Safety Requirements ........................................................................ 9
When Installing............................................................................................... 9
During Operation............................................................................................ 9
Overview .......................................................................................... 10
General.......................................................................................................... 10
Models........................................................................................................... 10
Advantages ................................................................................................... 10
Applications.................................................................................................. 11
Layout ........................................................................................................... 12
Pre-Installation ................................................................................ 13
General.......................................................................................................... 13
Tools & Equipment....................................................................................... 13
Site Survey Procedure ................................................................................. 13
Site Suitability............................................................................................. 13
Line of Sight ............................................................................................... 13
Range and Location ................................................................................... 14
Mounting Environment & Stability .............................................................. 16
Transmitting through a Window.................................................................. 19
Routine Checks for Adjustments ................................................................ 20
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Ordering Equipment................................................................................... 20
Installation .......................................................................................21
Fiberoptic Cable............................................................................................21
General ...................................................................................................... 21
Handling..................................................................................................... 21
Testing ....................................................................................................... 21
Laying ........................................................................................................ 23
Preparation ................................................................................................ 23
Connection................................................................................................. 23
Mounting........................................................................................................23
Mounting Accessories................................................................................ 24
Mounting Procedure .................................................................................. 24
Special Mounting Techniques .....................................................................25
Mounting on the Floor ................................................................................ 25
Mounting on a Fragile/Crumbly Wall.......................................................... 26
Alignment ......................................................................................................27
General ...................................................................................................... 27
Tools and Equipment ................................................................................. 27
Procedure .................................................................................................. 28
Connecting the TereScope 1s, Media Converters, and Switches.............31
Link Test ........................................................................................................33
For OptiSwitch ........................................................................................... 33
For Media Converter .................................................................................. 34
Installation Log .............................................................................................34
Operation and Management ...........................................................35
Troubleshooting ..............................................................................37
Appendix A: Product Specification ..............................................38
Appendix B: Required Materials ...................................................40
Electro-Optic Modules ..................................................................................40
Installation Tools ..........................................................................................40
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Equipment for Fiber Test and Link Alignment........................................... 40
Appendix C: Site Survey Form ..................................................... 41
Appendix D: Cleaning Optical Connectors ................................. 42
General.......................................................................................................... 42
Tools and Equipment................................................................................... 42
Procedure ..................................................................................................... 42
Appendix E: Installation Log ........................................................ 43
Appendix F: Received Signal Power vs Distance ....................... 47
Appendix G: EM2003-2PAL........................................................... 48
General.......................................................................................................... 48
Models........................................................................................................... 48
Layout ........................................................................................................... 48
Ambient Temperature .................................................................................. 49
Mounting ....................................................................................................... 49
Removing ...................................................................................................... 49
Cabling .......................................................................................................... 49
Appendix H: MC102/P.................................................................... 50
General.......................................................................................................... 50
Models........................................................................................................... 50
Layout ........................................................................................................... 50
Ambient Temperature .................................................................................. 51
Mounting ....................................................................................................... 51
Cabling .......................................................................................................... 51
Fiberoptic ................................................................................................... 51
Electrical .................................................................................................... 52
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Figures
Figure 1: Typical Application of TereScope 1............................................................................... 11
Figure 2: Front View of TereScope 1............................................................................................ 12
Figure 3: Rear View of TereScope 1 ............................................................................................ 12
Figure 4: Optimal Mounting .......................................................................................................... 15
Figure 5: Acceptable Mounting..................................................................................................... 15
Figure 6: Unrecommended Mounting ........................................................................................... 16
Figure 7: Unacceptable Mounting................................................................................................. 16
Figure 8: Mounting Locations in Order of Preference .................................................................. 17
Figure 9: Parapet/Ledge Mounting (using JMP only) .................................................................. 18
Figure 10: Wall Mounting (using JMP and JMB) ......................................................................... 18
Figure 11: Floor Pedestal Mounting (using JMP and M015C) .................................................... 18
Figure 12: Wall Pedestal Mounting (using JMP and M054C) ..................................................... 18
Figure 13: Extended Wall Mounting (using JMP and M062C) .................................................... 19
Figure 14: Angle Bracket Mounting (using JMP and M001)........................................................ 19
Figure 15: Arrangement for Transmitting through a Window ....................................................... 20
Figure 16: Light Source (left) and Optical-Power Meter (right) – Examples................................. 22
Figure 17: TereScope 1 with Mounting Plate and Ring............................................................... 25
Figure 18: Drawing of Vertical Mounting Brackets (JMBs)........................................................... 25
Figure 19: Mounting on a Concrete Slab...................................................................................... 26
Figure 20: Mounting on a Fragile Wall.......................................................................................... 27
Figure 21: Fine Alignment Motion Screws – Rear View ............................................................... 28
Figure 22: Connectors for Fiberoptic Cables................................................................................ 29
Figure 23: Beam (circle) on Receiver (rectangle) after Horizontal Alignment .............................. 30
Figure 24: Final Beam after Horizontal and Vertical Alignment ................................................... 31
Figure 25: Flange and Fiberoptic Cable Duct............................................................................... 31
Figure 26: Interconnection of TereScope 1s and OptiSwitches ................................................... 32
Figure 27: Interconnection of TereScope 1s, Media Converters, & Non-MRV Switches............. 33
Figure 28: Conversion of Optical Signal Power Reading by CLI to dBm ..................................... 36
Figure 29: Air Link Distance vs Expected Received Signal Power .............................................. 47
Figure 30: EM2003-2PAL Layout ................................................................................................. 48
Figure 31: MC102/P Layout.......................................................................................................... 50
Figure 32: Cable Wiring ................................................................................................................ 52
Tables
Table 1: Models of TereScope 1 .................................................................................................. 10
Table 2: CLI Commands for TereScope 1.................................................................................... 35
Table 3: Air Link Distance vs Minimum Required Received Signal Power .................................. 47
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Table 4: Front Panel LEDs ........................................................................................................... 49
Table 5: DIP Switch Setting.......................................................................................................... 51
Table 6: Front Panel LEDs ........................................................................................................... 51
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About this Manual
Purpose
This manual is intended for the user who wishes to install, operate, manage, and
troubleshoot the TereScope 11 photonic air link.
Audience
Qualifications
Users of this manual are expected to have working knowledge of:
•
Fiberoptic Cabling
•
LAN equipment (Layer 2)
Training
Installers are required to do a training course on MRV TereScopes that includes:
•
IR links (site survey, installation equipment, alignment, etc.)
•
Indoors and outdoors installation
•
On-the-job-training
•
Proficiency tests
Experience
Installers are required to have experience in LAN installation and IR equipment
installation.
Authorization
When all the requirements specified above (namely, Qualifications, Training, and
Experience) have been met, the installer is required to receive authorization from
MRV certifying eligibility.
Related Documents
1
•
Release Notes for TereScope 1 – if applicable. (This document contains
information not found in the User Manual and/or overriding information.)
•
TereScope Installation Guide (Publication No. 46366)
•
OptiSwitch User Manual
•
MegaVision NMS User Guide
TereScope is a trademark of MRV.
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Acronyms
CATV
Cable Antenna TeleVision
CLI
Command Line Interpreter
GPS
Global Positioning System
IR
Infra-Red
MTBF
Mean Time Between Failures
NA
Numerical Aperture
PVC
PolyVinyl Chloride
RSSI
Receiver Signal Strength Indication
STP
TELNET
Shielded Twisted-Pair
UTP
Unshielded Twisted-Pair
(dial-up) TELephone NETwork (connection protocol)
Safety Requirements
Caution!
To reduce risk of injury and to maintain proper operation, ensure that the
safety requirements stated hereunder are met!
When Installing
•
Ensure, by visual inspection, that no part of the TereScope 1 is damaged.
•
Avoid prolonged eye contact with the laser beam.
•
Ensure that the system is installed in accordance with ANSI Z136.1
control measures (engineering, administrative, and procedural controls).
•
Ensure that the system is installed in accordance with applicable building and
installations codes.
•
Install the TereScope 1 in a restricted location as defined in this manual since
it is a Class 1M FSOCS transmitter and receiver. A restricted location is a
location where access to the transmission equipment and exposed beam is
restricted and not accessible to the general public or casual passerby.
Examples of restricted locations are: sides of buildings at sufficient heights,
restricted rooftops, and telephone poles. This definition of a restricted location
is in accordance with the proposed IEC 60825-I Part 12 requirements.
•
Avoid using controls, adjustments, or procedures other than those
specified herein as they may result in hazardous radiation exposure.
During Operation
Avoid prolonged eye contact with the laser beam.
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Overview
General
TereScope 1 is a wireless optical communication link for transferring data over a
distance of up to 380 m (1250 ft) at 17 dB/km.
The TereScope 1 is unique in that data transmission and reception is fully optical.
Most wireless links have an interface unit for transferring data between the
transmission lines and air transciever. In the TereScope 1, optical data is directly
transferred between a special fiberoptic cable and the air, using appropriate
beam-shaping optics, without any intermediate processing electronics. This
technology eliminates all the disadvantages of electrical components (e.g.,
electric power, RFI/EMI, etc.) while providing all the inherent advantages of
optics (e.g., large bandwidth, greater reliability, higher security, etc.).
The TereScope 1 is used with a special fiberoptic cable and electro-optic module
provided by MRV. The fiberoptic cable has differing transmit and receive fibers.
The module can be a plug-in module for the OptiSwitch family of OSI Layer 2 and
3 compliant switches, or a standalone media converter switch.
Models
Two models of the TereScope 1 are available. Table 1 specifies the differences
between the models.
Table 1: Models of TereScope 1
Characteristic
Model
TS100/A/DST (Model A)
TS100/B/DST (Model B)
Operating Range (max)
240 m (800 ft) at 17 dB/km
380 m (1250 ft) at 17 dB/km
Receive (at Switch) Fiber
Core/Cladding Diameters
400/430 µm
600/630 µm
Fiber-coupled power
4 dBm
8 dBm
In this manual, TS100/A/DST is referred to as Model A and TS100/B/DST is
referred to as Model B.
Advantages
•
MTBF – over 10 years
•
Secure transmission
•
No electric power needed
•
No need for electrical grounding or lightning protection
•
No opto-electronic transducers needed
•
No EMI/RFI either to or from the TereScope 1.
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•
Immediate deployment
•
Temporary or permanent installation
•
Installable in harsh terrain and over obstacles (rivers, highways, etc.)
•
License-free
Applications
•
Point-to-Point and Mesh network topologies
•
Last-mile connectivity
•
Cellular network
•
LAN/WAN environments
•
Fiber backup
•
Disaster recovery backup
Figure 1 shows a typical application of the TereScope 1.
Figure 1: Typical Application of TereScope 1
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Layout
Alignment Telescope
Receive Lens
Transmit Lens
Support Bracket
Figure 2: Front View of TereScope 1
Alignment Telescope
Fiber ST Connector for
Output to Switch
Fiber ST Connector for
Input from Switch
Fine Alignment Screws
Coarse Alignment Screws
Figure 3: Rear View of TereScope 1
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Pre-Installation
General
Site survey is key for finding a suitable geographical area for an optical wireless
link. A good site survey, which covers all aspects of the installation requirements,
is a pre-requisite for satisfactory link installation and operation. Accordingly, it is
important:
• To determine the optimal geographical location for the link elements.
• That customers recognize their responsibilities prior to installation.
On completion of the link design, the Site Survey Form (shown in Appendix C:
Site Survey Form) should be filled out to assure complete coverage of all
installation aspects.
Tools & Equipment
The following equipment are useful in performing a successful and accurate site
survey:
•
Rangefinder binoculars
•
Digital camera
•
Compass
•
GPS receiver
•
3m’ tape measure.
•
Site Survey Form (shown in Appendix C: Site Survey Form)
Site Survey Procedure
Site Suitability
1. Try to avoid East-West directions for links because even if 0.5º of the sun disk
overlaps the receiver telescope, errors may occur on a few days in a year for a
few minutes each day.
2. Choose buildings of medium height. Avoid tops of skyscrapers because of
their large sway. In suburban areas, you should choose the tallest building in
the area that is not too tall.
Line of Sight
1. Make sure that no obstacles cross the line of sight between the two
TereScope 1s.
Examples of obstacles are: Growing trees, New buildings, Crane movement,
Bridges over which tall vehicles may pass, Birds nesting, Hot surfaces (such
as metal or black roofs), Exhaust gases or dust clouds, Smoke from chimneys.
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2. Photograph the line of sight view from the rooftops.
Note
It is important to photograph the view containing the line of sight from the
elevation at which you are going to mount the TereScope 1s. The
photograph can be used to: Recheck the location for details that may have
been overlooked during the survey, Show it for consultation, etc.
Range and Location
1. Referring to the data in Appendix A: Product Specification, under Operating
Range, set and record the distance between the two TereScope 1s of the link.
(You can use any of the following equipment to determine the distance:
rangefinder laser binoculars, GPS receiver, maps, etc.)
2. Noting that the length of fiberoptic cabling (interconnecting a TereScope 1 and
OptiSwitch or Media Converter) should not exceed 50 m (164 ft), set and
record the acceptable distance between each TereScope 1 unit and the
OptiSwitch (or Media Converter).
3. Noting that two TereScope 1 units are required per link, record the quantity of
each model of the TereScope 1 required. Each OptiSwitch module supports
up to two links, and the OptiSwitch may support several modules depending
on model. Accordingly, one OptiSwitch may be sufficient for connecting
several (possibly all) TereScope 1 units at one end of the links provided the
maximum fiber cable length, specified in Step 2 above, is not exceeded.
4. Record the bearing to the opposite site by compass.
5. Record the number of links to be installed at the site.
6. Note whether additional sheltering is needed for the TereScope 1s, for e.g.,
against strong winds (120km/h or more) – see Appendix C: Site Survey Form
for details.
Figure 4 and Figure 5 show optimal and acceptable locations for the
TereScope 1 links. Notice that in both figures the TereScope 1s are mounted on
rooftop edges and high enough above the ground.
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TereScope 1 mounted at corner
of leading edge of structure.
Figure 4: Optimal Mounting
TereScope 1 at edge of roof so
that heat rising from roof
surface does not affect beam
Beam path more than
4.5 m (15 ft) above
surface to avoid traffic
and rising heat.
Figure 5: Acceptable Mounting
Figure 6 shows an unrecommended TereScope 1 link location because of
interference by IR. Notice that the TereScope 1s are mounted far from the
rooftop edges or are too close to the ground.
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Figure 7 shows an unacceptable TereScope 1 link location because of
interference by passing vehicles. Notice that the TereScope 1s are mounted far
from the rooftop edges and not high enough above the ground.
TereScope 1 not at edge of roof.
Less than 4.5 m (15 ft) between
beam path and heat-emitting
surface.
TereScope 1 not at edge of roof.
Beam path passes too close to ground. Heat rising causes
scintillation. Allow 4.5 m (15 ft) between ground and beam path.
Figure 6: Unrecommended Mounting
Figure 7: Unacceptable Mounting
Mounting Environment & Stability
1. When deciding the mounting location, you should look on the rooftop for
vibration sources such as compressors, elevators, motors, and try to avoid
them.
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2. Photograph the mounting location so as to select the best mounting
option.
Figure 8 shows mounting locations on a rooftop in descending order of
preference. Location 1 is the best; location 7 is the worst.
Figure 8: Mounting Locations in Order of Preference
3. Avoid surfaces with high reflectivity (e.g., white walls) behind the
TereScope 1 so as to reduce interference with the optical signal.
4. Get customer approval for the exact positions where the TereScope 1s will
be mounted. Using paint, mark these positions.
5. Note the height that each TereScope 1 will be above or aside the rooftop.
6. Identify the floor or wall type and dimensions of the location at which the
TereScope 1 is planned to be mounted.
7. For each TereScope 1 unit, select one of the following mounting options2
and record it.
a. Parapet/Ledge Mounting (Figure 9) – This is a standard mounting
option that uses only the Plate (JMP).
b. Wall Mounting (Figure 10) – This is a standard mounting option
that uses the Plate (JMP) as well as the two Brackets (JMBs).
2
For more information on these mounting options, refer to TereScope Installation Guide
(Publication No. 46366).
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c. Floor Pedestal Mounting (Figure 11) – This is a non-standard
mounting option that uses the Plate (JMP) as well as a Floor
Pedestal (e.g., M015C).
d. Wall Pedestal Mounting (Figure 12) – This is a non-standard
mounting option that uses the Plate (JMP) as well as a Wall
Pedestal (e.g., M054C).
e. Extended Wall Mounting (Figure 13) – This is a non-standard
mounting option that uses the Plate (JMP) as well as an Extended
Wall (e.g., M062C).
f. Angle Bracket Mounting (Figure 14) – This is a non-standard
mounting option that uses the Plate (JMP) as well as an Angle
Bracket (e.g., M001).
Figure 9: Parapet/Ledge Mounting
(using JMP only)
Figure 11: Floor Pedestal Mounting
(using JMP and M015C)
Figure 10: Wall Mounting
(using JMP and JMB)
Figure 12: Wall Pedestal Mounting
(using JMP and M054C)
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Figure 13: Extended Wall Mounting
(using JMP and M062C)
September 2002
Figure 14: Angle Bracket Mounting
(using JMP and M001)
Transmitting through a Window
1. Determine the number of surfaces the beam transits or is reflected from,
the reflectivity of each surface, and condensation/precipitation collection
areas.
2. Use the data below to determine whether the light beam attenuation is
acceptable.
o 4% attenuation for each surface of light reflection.
o 15% attenuation for a double pane window.
o Attenuation due to tint in windowpane must be taken into
consideration in choosing the right TereScope 1 model. (The %
attenuation depends on the tint and must be measured.)
3. Ensure that the angle of incidence3 of the beam striking the windowpane is
between 1º and 45º.
Note
On high buildings, for indoor window installation, the user should consider
that occasionally the window-cleaning elevator might block the link beam.
3
Angle which the light beam makes with the perpendicular to the windowpane.
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Figure 15 shows the arrangement for transmitting through a window.
Angle A is the angle of incidence
0
1 < A < 45
0
Figure 15: Arrangement for Transmitting through a Window
Routine Checks for Adjustments
Ensure that all rooftop sites are visited about two or three weeks prior to the
installation of the system. Make sure that no changes took place, which may
have a direct effect on the planned installation. Note the relevant changes and
make sure that timely adjustments are implemented in the system, to
accommodate these changes.
Ordering Equipment
Using the results of the survey, Appendix A: Product Specification, Appendix B:
Required Materials, and Appendix C: Site Survey Form, place orders for the
required MRV equipment and materials for the installation process.
Note
For insurance, it is advisable to order a longer fiberoptic cable than that
required by measurement.
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Installation
Fiberoptic Cable
General
MRV supplies a special fiberoptic cable for carrying optical data between the
OptiSwitch (or Media Converter) and the TereScope 1. The cable contains both a
transmit fiber and a receive fiber, each of different type. The TereScope 1 head
has no light source, detector, or amplifier inside. Therefore the cable plays a
crucial role in the link, as any loss in the cable translates into an equal loss in the
received signal strength.
The fiberoptic cable is an outdoor cable having 2 active fibers and 3 vacant
sheaths. These vacant sheaths (together with the active fibers) are needed to
give the cable a cylindrical shape for robustness. The cable has four connectors,
two at each end, for interconnecting a TereScope 1 unit and OptiSwitch (or
Media Converter). Each end of the cable is protected with a heat-shrink sleeve,
part of which is shrunk around the cable end and the part around the connectors
is left unshrunk for connection convenience. The unshrunk part is covered with a
cap to protect the connectors from damage during the installation process. The
cable is available in various lengths. (The specification of the cable is given in
Appendix A: Product Specification.)
Handling
The fiberoptic cable should be handled with care since fiberoptic cables, in
general, are fragile. In particular,
•
Do not bend any part of the fiberoptic cable to a radius that is smaller than
the minimum permitted according to the manufacturer’s specification
(usually 210 mm or 8.25 in).
•
Do not apply physical stress that is greater than the maximum permitted
according to the manufacturer’s specification.
Caution!
Handle the fiberoptic cable and optical jumper ends with care even when
the connectors are protected.
Testing
General
Before laying the fiberoptic cables, the attenuation of each fiber should be
measured to determine if it is acceptable.
Tools and Equipment
The following tools and equipment are required for testing the fiberoptic cables.
•
Fiberoptic cables.
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•
Optical-power meter – shown in Figure 16. (If the readings are in dBm, the
difference between the input and output power gives the power
attenuation of the fiber in dB. )
•
850 nm light source4 – shown in Figure 16.
•
100/140 µm patch jumper fiberoptic cable5 (supplied by MRV6 on
customer order).
•
ST-ST adapter.
Figure 16: Light Source (left) and Optical-Power Meter (right) – Examples
Procedure
1. Connect the optical power meter to the light source with the patch cable.
Measure the power (in dBm). Disconnect the patch cable from the power
meter but leave its other end connected to the light source.
2. Connect one end of the transmit fiber (yellow-sheathed) of the fiberoptic
cable under test to the patch cable with an ST-ST adapter. Connect its
other end to the optical power meter. Measure the power (in dBm).
4
An OptiSwitch module or a Media Converter may be used.
5
A patch jumper cable is short, has connectors at both ends, and has negligible attenuation.
6
Instead, the following fiberoptic patch cables may be used:
For Model A: 50/125 µm or 62.5/125 µm.
For Model B: 50/125 µm. (The 62.5/125 µm patch cable is not suitable for Model B because it
introduces measurement errors.)
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3. Note the difference in the two measurements in Steps 1 and 2. This is the
attenuation of the fiber in dB. Stick a label with the attenuation value on
the fiber.
4. Repeat Steps 1 to 3 for the receive fiber (blue-sheathed) of the fiberoptic
cable.
5. For each fiber, the attenuation needs to be between 0.3 dB and 1 dB,
depending on the cable length.
6. Repeat Steps 1 to 5 for all fiberoptic cables.
Laying
It is strongly recommended to run the fiberoptic cable on roofs and in buildings in
cable canals (made of PVC) and not to pull them through ducts because of the
risk of applying too much frictional stress.
For each bend of the cable at a corner, use a short piece of flexible plastic
tubular duct (the same type supplied with the TereScope 1 – see Figure 25). The
duct serves a double purpose. It ensures that no damaging stress will be applied
to the cable, and that the cable will be accessible for troubleshooting if needed.
Preparation
Each end of each cable is fitted with two ST type optical connectors and
protected with a heat shrink sleeve and a cap. After laying the fiberoptic cable,
remove the cap and carefully cut off the unshrunk part of the heat shrink sleeve
with scissors or an exactor knife to reveal the cable fibers and connectors.
Note
If your TereScope 1 is Model A, do not bend the cable fiber to a
radius smaller than 60 mm (21/2 in).
If your TereScope 1 is Model B, do not bend the cable fiber to a
radius smaller than 120 mm (5 in).
Connection
The fiberoptic cables are connected after alignment is completed as described in
the section Connecting the TereScope 1s, Media Converters, and Switches.
Mounting
This section shows how to mount the TereScope 1 and accessories at a site. For
required materials, refer to Appendix B: Required Materials.
Note
Avoid surfaces with high reflectivity (e.g., white walls) behind the
TereScope 1 so as to reduce interference with the optical signal.
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Mounting Accessories
Standard
The following standard mounting accessories are available for the TereScope 1:
1. Mounting Plate (JMP) and Mounting Ring – shown in Figure 17. These are
used for mounting on a horizontal concrete surface, and are supplied with
all TereScope 1s. The Mounting Plate is always required.
2. Mounting Brackets (JMBs) – shown in Figure 18. They are used for
mounting on a vertical surface, and are supplied on customer order.
Non-Standard
These are additional accessories required for special mounting options, and are
supplied on customer order. The mounting options are shown in Figure 11,
Figure 12, Figure 13, and Figure 14.
Mounting Procedure
1. If you are going to use an MRV standard mount, disassemble the
mounting plate and mounting ring (shown in Figure 17) – if they are joined
to each other – from the TereScope 1.
2. Secure the mounting plate to a parapet, ledge, or an MRV mounting
bracket, possibly with additional non-standard accessories. (When
mounting the TereScope 1 on an MRV non-standard mount, do not
disassemble the mounting plate from the ring – just connect the mounting
plate with the supplied 4 x 8 mm bolts).
3. Place the TereScope 1 on the mounting plate.
4. Secure the TereScope 1 with bolts and washers, with the mounting ring
outside the bolts – see Figure 17. Do not tighten the bolts so that the
TereScope 1 can be rotated. Tighten them only after coarse alignment has
been performed as described in the section Coarse Alignment.
24
TereScope 1
September 2002
ML46508, Rev. 02
Coarse Alignment
Vertical Motion Screw
(1 of 2)
Coarse Alignment
Horizontal Motion
Locking Bolts (1 of 4)
Coarse Alignment Vertical
Motion Locking Screw
(1 of 2)
Mounting Ring
Mounting Plate
(JMP)
Figure 17: TereScope 1 with Mounting Plate and Ring
dia. 8.00
4 places
4.0
260.0
0.0
0.0
45.0
45.0
93.0
93.0
170.0
170.0
247.0
260.0
13.0
34.0
a. JMB Left
247.0
260.0
0.0
dia. 8.00
4 places
13.0
34.0
b. JMB Right
Figure 18: Drawing of Vertical Mounting Brackets (JMBs)
Special Mounting Techniques
This section describes two widely used mounting options:
•
Mounting on the Floor
•
Mounting on a Fragile/Crumbly Wall
Mounting on the Floor
On roofs with a metallic parapet or without a parapet, drilling holes in the roof
floor is not recommended. In such cases, the only place where the installation is
practicable or authorized is on the floor.
25
375.0
321.0
244.0
167.0
90.0
13.0
13.0
0.0 0.0
90.0
167.0
244.0
321.0
375.0
13.0
0.0
0.0 0.0
13.0
34.0
34.0
4.0
260.0
TereScope 1
ML46508, Rev. 02
September 2002
The technique for mounting on such roof floors – illustrated in Figure 19 – is as
follows:
1. Prepare a small concrete slab (60 cm x 60 cm x 15 cm). (This slab will be
used to stabilize the pedestal7 for the TereScope 1.)
2. When the slab solidifies, secure the floor pedestal with screws passed
through holes drilled into the slab.
3. Remove any intervening extraneous material, such as asphalt, present
between the slab/tower base and the floor. After mounting is completed,
restore the roof waterproofing around the slab with appropriate sealing
material.
Floor pedestal: MO15C,
M059C, M057C, M055C,
M058C, M050C
Concrete Slab
Roof Floor
Figure 19: Mounting on a Concrete Slab
Mounting on a Fragile/Crumbly Wall
At sites where installation on fragile (pre-fab) or crumbly (old or red brick) walls is
unavoidable, the best way to securely fix the vertical mounting brackets is to use a
metallic clamping plate8. The clamping plate provides greater rigidity and stability.
The technique for mounting on such walls is illustrated in Figure 20.
7
The pedestal is supplied by MRV  on customer order.
8
The metallic clamping plate is supplied by MRV  on customer order.
26
TereScope 1
September 2002
ML46508, Rev. 02
Fragile Wall
Clamping Plate
Figure 20: Mounting on a Fragile Wall
Alignment
General
Point-to-point connections require face-to-face orientation of both transceiving
ends of the link. With wireless optical links, the beam spot should be positioned
symmetrically on the remote receiver, as accurately as possible.
Tools and Equipment
Note
The customer can order patch cables and high-output portable source from
MRV.
The following tools and equipment are required at each link end:
•
A communication device (mobile phone or walkie-talkie)
•
850 nm fiberoptic light source with 4 to 8 dBm output power to be
launched into the 100 µm fiber. The precise output power required
depends on the cable attenuation.
•
Optical-power meter, preferably giving readings in milliwatts/microwatts
rather than in dBm.
•
Patch jumper fiberoptic cable (100/140 µm) – for the light source
•
Patch jumper fiberoptic cable (400/430 µm or 600/630 µm) – for the power
meter.
If there is no other light source available, the OptiSwitch module or Media
Converter transmitter (Tx port) may be used as the light source. The Tx port
emits rated power upon power-up. No data transmission is required.
27
TereScope 1
September 2002
ML46508, Rev. 02
Caution!
Cover the fiber output from view or turn off the light source until ready to
connect it to the link.
Procedure
The alignment procedure is done in two stages:
− Coarse Alignment
− Fine Alignment
Coarse Alignment
1. Slightly loosen the Horizontal Motion Locking Bolts and the Vertical Motion
Locking Bolts (two on each support bracket) – see Figure 17.
2. To enable maximum flexibility during the fine alignment stage, rotate the
fine alignment screws (Figure 21) until the alignment bar is centered.
3. While looking (see note below) through the telescope, rotate and tilt the
TereScope 1 to bring the telescope crosshairs on the telescope lens of the
opposite TereScope 1.
Note
The laser used in the Opto-electronic modules is Class 1M and sighting it
through the telescope from 10 m (33 ft) is not harmful. Even so, exposure
time should be minimized.
4. Tighten the four coarse alignment screws and four bolts by applying a
torque less than 20 Newton-meter.
Fine Alignment
General
The purpose of fine alignment is to position the center of the transmitted beam
spot on the center of the TereScope 1 receiver – in both directions. This is
achieved by adjusting the horizontal and vertical motion screws (shown in Figure
21) until maximum power is received at the opposite TereScope 1.
Fine Alignment Horizontal Motion
Screws with Locking Nuts
Fine Alignment Vertical Motion
Screws with Locking Nuts
Alignment
Bar
Figure 21: Fine Alignment Motion Screws – Rear View
Fine Alignment Vertical Motion Screws – Two screws. Used for fine rotation of
the TereScope 1 in the vertical plane. Both screws are required to lock a vertical
position.
28
TereScope 1
September 2002
ML46508, Rev. 02
Fine Alignment Horizontal Motion Screws – Two screws. Used for fine rotation
of the TereScope 1 in the horizontal plane. Both screws are required to lock a
horizontal position.
To use any fine alignment screw, its nut must first be released.
Procedure
Note
Two installers are required for fine alignment, one at each TereScope 1
site.
The fine alignment procedure is as follows:
1. Make certain the power meter is set for 850 nm wavelength.
2. At one TereScope 1 (Site A), remove the flange and duct (shown in Figure
25). Referring to Figure 22, do either of the following:
a. Connect one end of the yellow-sheathed cable to an OptiSwitch
module or Media Converter and the other end to the TereScope 1’s
FROM SWITCH connector, as shown in Figure 26 and Figure 27,
or
b. Connect a light source with a 100/140 µm patch cable to the FROM
SWITCH connector.
3. At the other TereScope 1 (Site B), remove the flange and duct. Referring
to Figure 22, use the patch cable (400/430 µm for Model A and
600/630 µm for Model B) to interconnect the optical power meter and the
TO SWITCH connector.
TO SWITCH Connector
FROM SWITCH Connector
Figure 22: Connectors for Fiberoptic Cables
4. At Site A, turn the horizontal motion screws until the installer at Site B
reports maximum received power. (This assures that the beam spot is
positioned symmetrically in the left-right direction about the TereScope1
receiver located behind the telescope lens, as shown in Figure 23.)
Close the screws lightly – do not tighten!
5. At Site A, turn the vertical motion screws until the installer at Site B reports
maximum received power. (This assures that the beam spot is now
positioned at the center of the TereScope1 receiver located behind the
telescope lens, as shown in Figure 24. The received power should be
29
TereScope 1
September 2002
ML46508, Rev. 02
about the same as the expected power given in Table 3 of Appendix F:
Received Signal Power vs Distance. Table 3 shows expected power for
various distances.) Record the maximum received power in µW.
Note
This power reading is the sum of both signal and background light.
On a sunny day or for long air links, the background light may add significantly to
the true signal power. The problem is resolved in Steps 8 and 9.
6. Repeat the horizontal and then the vertical alignment to ensure maximum
reading.
7. Tighten all the fine alignment screws and locking nuts.
8. Disconnect or turn off the light source, then measure and record the
background light power in microwatts.
9. Subtract the background reading from the recorded maximum received
power in Step 5 to get the signal power. This signal power should be close
to the expected power given in Appendix F: Received Signal Power vs
Distance.
10. Repeat Steps 1 to 9 for the opposite direction.
V1
H1
H2
V2
Figure 23: Beam (circle) on Receiver (rectangle) after Horizontal Alignment
V1
H1
H2
V2
30
TereScope 1
ML46508, Rev. 02
September 2002
Figure 24: Final Beam after Horizontal and Vertical Alignment
Connecting the TereScope 1s, Media
Converters, and Switches
1. At one of the two TereScope 1s of the link, release the flange and duct
(shown in Figure 25) by unscrewing the flange.
Figure 25: Flange and Fiberoptic Cable Duct
2. After cutting off the unshrunk piece of the sleeve on the fiberoptic cable
end, carefully slip the cable through the duct and flange.
3. Connect the transmit fiber (yellow-sheathed) to the FROM SWITCH
connector, and the receive fiber (blue-sheathed) to the TO SWITCH
connector.
4. Verify that the connectors are coupled well.
5. Rescrew the flange in its place, making sure it is firmly tightened.
6. Repeat Steps 1 to 5 for the other TereScope 1 of the link.
7. If you have MRV9 OptiSwitches, connect the TereScope 1s as shown in
Figure 26.
If you do not have OptiSwitches, connect the TereScope 1s to switches
via MRV MC102/P as shown in Figure 27.
9
MRV Communications Inc.
31
TereScope 1
ML46508, Rev. 02
September 2002
Figure 26: Interconnection of TereScope 1s and OptiSwitches
32
TereScope 1
ML46508, Rev. 02
September 2002
Figure 27: Interconnection of TereScope 1s, Media Converters, & Non-MRV Switches
Link Test
For OptiSwitch
In the network in Figure 26, perform ping test for the remote OptiSwitch to check
if link connectivity is OK.
33
TereScope 1
ML46508, Rev. 02
September 2002
For Media Converter
In the network in Figure 27, perform ping test for the remote Non-MRV switch to
check if link connectivity is OK.
Installation Log
In the Installation Log, record all the information about the installation (including
the optical power received power at the OptiSwitch. This power reading can be
obtained using the OptiSwitch CLI command get-pal-port-optical-power). This
information will be a valuable reference for future maintenance and
troubleshooting.
34
TereScope 1
September 2002
ML46508, Rev. 02
Operation and Management
The TereScope 1 becomes fully operational as soon as it is installed.
TereScope 1 operation can be monitored through the OptiSwitch’s CLI with either
of the following management stations:
• ASCII terminal/emulator (e.g., VT100 terminal or emulator)
• TELNET station
• SNMP NMS
• Web-based NMS
For connection and setup details for ASCII terminal/emulator or TELNET station,
refer to the OptiSwitch User Manual.
For Web-based monitoring of the TereScope 1, refer to MRV MegaVision NMS
User Manual.
Table 2 lists and describes the CLI commands for the TereScope 1. These
commands are in the port-cfg menu of the OptiSwitch CLI.
Table 2: CLI Commands for TereScope 1
No.
1
Command
get-pal-portoptical-power
Description
Show the reading of the received optical signal power at the
port of the pal (TereScope 1).
[arg #100] Ports
Argument choices are:
<slot #>.<port # in slot>-<slot #>.<port # in slot>- etc
(i.e., individual ports.)
<slot #>.<port # in slot>..<slot #>.<port # in slot>
(i.e., range of ports)
Readings of the optical signal power are limited to the range 0
to 15. To determine the reading in dBm, use Figure 28.
2
set-pal-samplingrate
Set the pal (TereScope 1) optical power sampling rate.
opt.[arg #0] <Time interval in minutes>. Default: 1.
opt.[arg #1] <Time interval in seconds>. Default: 0.
Example: To set the sampling time interval to 3 minutes and 35
seconds, type set-pal-sampling-rate 3 35.
Figure 28 shows how to convert the received optical signal power reading
obtained with the CLI command get-pal-port-optical-power. The vertical axis
shows the reading and the horizontal axis shows its value in dBm. The reading is
accurate to + 1 dB.
10
# is number.
35
O p tic a l S ig n a l P o w e r R e a d in g b y C L I
TereScope 1
September 2002
ML46508, Rev. 02
14
12
10
8
6
4
2
0
-4 0
-3 5
-3 0
-2 5
-2 0
O p tic a l S ig n a l P o w e r in d B m
Figure 28: Conversion of Optical Signal Power Reading by CLI to dBm
36
TereScope 1
ML46508, Rev. 02
September 2002
Troubleshooting
Since the TereScope 1 is a passive device, it is unaffected by EMI, RFI, power
cuts, etc. Only violent physical disturbances or faulty optical power input from the
OptiSwitch module may cause the device to malfunction.
The following procedure shows how to troubleshoot a faulty optical power input.
Follow the steps in the order given until the problem is resolved. If the problem
persists, consult your MRV representative.
1. Ensure that the fiberoptic cable at the OptiSwitch is properly connected.
2. Invoke the CLI command get-pal-port-optical-power for the OptiSwitch
module port connected to the TereScope 1.
If the power is too low, first make sure that there are no interferences with
the air link (e.g., fog, smoke, dust, etc.).
3. Ensure that the fiberoptic cable at the TereScope 1 is properly connected.
4. Ensure that the fiberoptic cable (connectors, etc.) is not physically
damaged.
5. Ensure that there are no unnecessary bends or pressure on the optical
cable anywhere in the building or on the roof.
6. Ensure that there is no physical damage to the TereScope 1.
7. Ensure that the optical link attenuation is less than the power budget of
the OptiSwitch module.
8. Repeat Steps 1 to 7, above, for the other TereScope 1 of the link.
37
TereScope 1
September 2002
ML46508, Rev. 02
Appendix A: Product Specification
Protocol
Fast Ethernet
Link Beam
Transmitted Beam Divergence
6 milliradians
Receiver Aperture Diameter
85 mm
Receiver Field-of-View
6 milliradians
Operating Range
Attenuation
Weather Condition
Maximum Range
Model A
Model B
17 dB/km
Moderate rain
240 m
380 m
30 dB/km
Blizzard, cloudburst
200 m
300 m
Management
MegaVision  (SNMP), TELNET, Serial/RS-232
Fiberoptic Cable
Maximum length
Up to 50 meters at each link end
Attenuation
10 dB/km
Transmit Fiber:
Sheath
Core/Cladding Diameters:
Model A
Model B
Yellow
100/140 µm
100/140 µm
Receive Fiber
Sheath
Core/Cladding Diameters:
Model A
Model B
600/630 µm
Fiber Bend Radius (min. permitted)
Model A
60 mm (21/2 in)
Model B
Blue
400/430 µm
120 mm (5 in)
Cable Bend Radius (min. permitted)
210 mm (8.25 in)
Fiber Connectors
ST 
Environmental
Temperature
Operating:
-40 to +60 °C (-40 to 140 °F)
Storage:
-40 to +60 °C (-40 to 140 °F)
Humidity (non-condensing)
Less than 90%
Housing
Weatherproof (IP-66)
38
TereScope 1
ML46508, Rev. 02
September 2002
Physical
Dimensions (W x H x D)
248 x 155 x 375 mm 3 (93/4 x 61/8 x 143/4 in3)
Weight (including mounting accessories)
4.5 kg (10 lb)
Torque applicable to Coarse Alignment
Screws (max)
20 Newton-meter
Standards Compliance
Media Access
IEEE 802.3 CSMA/CD; IEEE 802.3u CSMA/CD
Safety
UL-1950; CSA 22.2 No. 950; FCC Part 15, Class A;
CE-89/336/EEC, 73/23/EEC, IEC 1M Laser safety,
IP-66
Part Numbers
Model A
TereScope100/A/DST
Model B
TereScope100/B/DST
39
TereScope 1
ML46508, Rev. 02
September 2002
Appendix B: Required Materials
Electro-Optic Modules
The electro-optic modules are designed to send and receive optical data through
the link. The following two types of electro-optic modules are available:
OptiSwitch Module
The OptiSwitch module is a special plug-in module for use in MRV’
OptiSwitch family of OSI Layer 2 and 3 compliant switches. For more
information, please refer to the relevant OptiSwitch manual.
Media Converter
The media converter is designed to convert between the TereScope 1
format and fiberoptic 100Base-FX (or copper 100Base-T) format. For more
information, please refer to the manuals of the media converter and your
network equipment.
Installation Tools
•
Electric drill with impact action for masonry, reversible motion, speed
control, and a 0-13 mm adjustment chuck.
•
Concrete carbide drill bits: 6 mm, 12 mm, and long (30 cm) 12 mm for
penetrating concrete walls.
•
Power screwdriver.
•
Threading equipment.
•
Toolbox containing: “Hex driver (Allen) set; open-ended wrench from
6 mm to 17 mm; hammer (200 g); regular pliers; long-nose pliers; cutter;
flat-tip screwdrivers, Philips screwdrivers; exactor knife; Socket wrench for
8 mm, 10 mm, 11 mm, 12 mm, 14 mm, ½-inch, etc.
Equipment for Fiber Test and Link Alignment
•
Fiberoptic power meter for 850 nm (e.g. of EXFO or ACTERNA).
•
Fiberoptic multi-mode light source of 850 nm wavelength for multimode
fibers (e.g. of EXFO or ACTERNA).
•
Visual fault locator.
•
Fiberoptic jumper – 1 m, 100/140 µm core/cladding diameters
•
Fiberoptic jumper – 1 m, 400/430 or 600/630 µm core/cladding diameters
40
TereScope 1
September 2002
ML46508, Rev. 02
Appendix C: Site Survey Form
TereScope™
LINK SITE SURVEY FORM
City
Date
Street
Address
Company Name
NOTES
Line of Sight
√
Check Path for:
________/________/02
Mounting Environment & Stability
Vibration Sources
Trees
Compressors or Motors
Growing trees
Elevators
Birds nesting
Mounting area, wall type
Power line movement
Expected minimum and maximum
temperatures
Local atmospheric disturbances
Microwave dishes
Hot surfaces
Electromagnetic interference
sources
Pedestrian or vehicle traffic
Antennas
Concrete/ red brick/ block/
Marble
Other_________
Exhaust or dust clouds
Other electronic equipment
Exhaust vents
Additional shelter requirements
Photo taken of underlying terrain
(Photo of area below line of sight)
Photo taken of mounting location
Photo taken of “line-of-sight”
Mount Placement (Best available mount placement on
building)
Photo taken of rooftop
Mounting Brackets Part # s
M001, M015C, M022C, M050C
M051C, M053C, M054C, M055C
M056C, M057C, M058C, M059C
M062C, M063C, M064C, PCL3
PCL4, PCL5, PCL6, JMP
Transmission through a Window
Elevation angle
______º
Number of window surfaces
Mounting adaptor needed
Reflective coating on window
Dimensions for adaptor
Precipitation collection areas
Power
Beam angle to window
Power Source
Main and/or UPS
Range & Location Information
Voltage & Frequency (AC)
110Vac/60Hz or 220 Vac/50Hz
Distance between sites (m)
Voltage (DC)
24Vdc, 48Vdc, other_________
Method used to measure distance:
(GPS, laser binoculars, maps, other)
TereScope Lightning Rod
(Recommended optional
accessory)
Yes / No
Number of links to be installed at the site
Cable Length for TS 1 PAL
10 m, 30 m, 40 m, other_______
Bearing to the receiving site (as measured
with compass)
E__________ °
Data Interface
W__________ °
Data Rate (Mbps)
Cabinets for Routers & Switches (if applicable)
3
Host Network Equipment
Fiber Wavelength
19" rack mount space (in U, 1U = 1 /4 in)
1Gbps, 622 Mbps, 155 Mbps,
100 Mbps, 25 Mbps, 10 Mbps, E1,
T1, other____
850nm, 1310nm, MM, SM
Large cabinet
Yes/No
Optical Connector
SC/PC, ST/PC, other_________
Small cabinet
Yes/No
Other connectors
RJ45, RJ48, BNC, other_______
TereScope Model Required____________________
41
TereScope 1
ML46508, Rev. 02
September 2002
Appendix D: Cleaning Optical
Connectors
General
Intrusions (e.g., dust, grease, etc.) at the interface of two optical fibers, such as
at a pair of coupled connectors, attenuate the signal through the fiber.
Consequently, optical connectors must be cleaned before they are coupled with
other connectors.
Tools and Equipment
Following are tools and equipment required for cleaning connectors.
•
Dust caps
Caps for protecting the connector from intrusions. A cap is usually made
from flexible plastic. When placing a cap over a connector, avoid pressing
it against the fiber ferula surface in the connector so as to prevent
contamination.
•
Isopropyl alcohol
Solvent for contaminants.
•
Tissues
Soft multi-layered fabric made from non-recycled cellulose.
Procedure
The procedure for cleaning connectors is as follows:
1. If no stains are present, using a new clean dry tissue, gently rub, in small
circular motions, the exposed fiber surface and surrounding area in the
connector to remove dust.
2. If stains are present,
A. Moisten a new clean dry tissue with isopropyl alcohol and gently
rub, in small circular motions, the exposed fiber surface and
surrounding area in the connector to remove the stains.
B. Using a new clean dry tissue, gently rub, in small circular motions,
the exposed fiber surface and surrounding area in the connector to
remove the dissolved stains and excess isopropyl alcohol.
C. If a connector is not to be coupled with another immediately, cover
it with a dust cap.
42
TereScope 1
ML46508, Rev. 02
September 2002
Appendix E: Installation Log
E.1. Client/Dealer Information
Customer
Dealer
Company Name
Address
City
Country
Contact Person
Tel
Fax
E-mail
E.2. Application Information
Type of network
T1 ,
E1 ,
Ethernet ,
Ethernet , FDDI ,
ATM ,
Product
Evaluated distance by customer
Address of installation at Site A
Address of installation at Site B
E.3. Area Sketch
E.4. Installation
Done by
Customer representative
Date
43
Token Ring ,
Fast
Other (Specify)
TereScope 1
September 2002
ML46508, Rev. 02
Site A
Site B
Site A
Site B
System model
Serial number
Location: (Should be the
same as by site survey, if
not provide details)
Accessories: (Should be the
same as by site survey, if
not provide details)
Received
Signal
Strength
Total
Received
Power
Background
Light Power
Signal
Power
Telescope calibration :
if cannot , sketch the
telescope view
BER test
BER equipment type
Loopback location
Error type (random, burst)
Brief interruption test
E.5. System failure
Visit made by
Customer representative
Date
Sketch of telescope view
44
TereScope 1
Received
Signal
Strength
September 2002
ML46508, Rev. 02
Total Received
Power
Background
Light Power
Signal Power
Failure detail
Action items
Visit made by
Customer representative
Date
Site A
Site B
Sketch of telescope view
Digital readout
Failure detail
45
TereScope 1
ML46508, Rev. 02
Action items
46
September 2002
TereScope 1
September 2002
ML46508, Rev. 02
Appendix F: Received Signal Power
vs Distance
This table is provided to give the installer an estimate of the expected received
signal power after fine alignment. The values given apply when an OptiSwitch or
Media Converter transceiver module is used as a light source and the patch
cables are as specified in the section Tools and Equipment under Alignment.
Table 3: Air Link Distance vs Minimum Required Received Signal Power
Air Link
Distance
(m)
Received Power
for
Model A
µW
10
50
100
150
200
250
Received Power
for
Model B
dBm
266.7
-5.7
26.3
-15.8
7.6
-21.2
3.6
-24.5
Not Applicable
Not Applicable
µW
dBm
1190
118
34
16
9.2
6.0
-0.8
-9.3
-14.7
-18
-20.3
-22.2
Figure 29 shows the relation between the air link distance and expected received
power (in dB) graphically.
TereScope 1
Received Signal Power vs Distance
Receive Power dBm
10
0
-2
-4
-6
-8
-10
-12
-14
-16
-18
-20
-22
-24
-26
-28
-30
50
100
150
200
250
-5.7
-15.8
-21
-24.5
-26
-28
Air Link Distance
PAL A
PAL B
Figure 29: Air Link Distance vs Expected Received Signal Power
47
TereScope 1
ML46508, Rev. 02
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Appendix G: EM2003-2PAL
General
The EM2003-2PAL is used to connect up to two TereScope 1 links to the
OptiSwitch with special fiberoptic cables provided by MRV . These fiberoptic
cables are described in Appendix A: Product Specification.
Models
Model EM2003-2PAL/A is used with TereScope 1 Model A.
Model EM2003-2PAL/B is used with TereScope 1 Model B.
Layout
Figure 30: EM2003-2PAL Layout
Captive Screws
Two screws for fastening the EM2003-2PAL in the OptiSwitch.
100Base-FX Ports
Protocol
100Base-FX
Number of ports (TX, RX
connector pair)
Two (for two TereScope 1 links)
Connector Type
ST
Port Speed/Duplexity
100Mbps/Full-Duplex
Operating Wavelength
850 nm VCSEL
Transmitter Power
(Fiber-coupled power)
Model A:
Model B:
Receiver Sensitivity
-33 dBm
4 dBm
8 dBm
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TereScope 1
ML46508, Rev. 02
September 2002
LEDs
Table 4: Front Panel LEDs
LED
L1
A1
L2
A2
Status
ON
OFF
ON
OFF
ON
OFF
ON
OFF
Significance
Port P 1 link OK.
Port P 1 link absent or faulty.
Port P 1 activity11 present.
Port P 1 activity absent.
Port P 2 link OK.
Port P 2 link absent or faulty.
Port P 2 activity present.
Port P 2 activity absent.
Ambient Temperature
The required ambient temperature ranges for the EM2003-2PAL are as follows:
Operating: 0 to 40 °C
Storage:
-10 to +50 °C
Mounting
To mount an EM2003-2PAL, do the following:
1. Make sure that the power to the OptiSwitch is OFF.
2. Select any available slot in the OptiSwitch.
3. If a Blank Panel is covering the slot, remove it by loosening the two
screws.
4. Holding the EM2003-2PAL by the panel, place the two side edges of its
metal base in the rails of the slot. Then slide it until its panel is level with
the front panel of the OptiSwitch. (This assures that the module is properly
inserted.)
5. Fasten the EM2003-2PAL with its two captive screws (shown in Figure 30).
Removing
1. Make sure that the power to the OptiSwitch is OFF.
2. Loosen the two captive screws on the EM2003-2PAL (shown in Figure 30)
and gently pull out the EM2003-2PAL.
Cabling
The yellow-sheathed fiber of an MRV special cable is connected to a TX
connector. The blue-sheathed fiber of an MRV special cable is connected to a
RX connector.
11
transmission/reception
49
TereScope 1
ML46508, Rev. 02
September 2002
Appendix H: MC102/P
General
The MC102/P is used to connect a TereScope 1 link to a non-MRV switch with
special fiberoptic cables provided by MRV . These fiberoptic cables are
described in Appendix A: Product Specification.
The MC102/P supports ordinary, VLAN, MPLS, and jumbo frames.
Models
Model MC102/P/A is used with TereScope 1 Model A.
Model MC102/P/B is used with TereScope 1 Model B.
Layout
Figure 31: MC102/P Layout
Power Port
3-prong receptacle with universal power supply for 90-260V and 60/50Hz line
(mains) power input.
100Base-TX Port P1
Protocol
100Base-TX/Full-Duplex
Connector Type
RJ45 8-pin female
Pinout (MDI-X)
1ÆTx+; 2ÆTx-; 3ÆRx+; 6ÆRx-
100Base-FX Port P2
Protocol
100Base-FX/Full-Duplex
Connector Type
ST
Operating Wavelength
850 nm
Transmitter Power
Model A:
Model B:
Receiver Sensitivity
-33 dBm
4 dBm
8 dBm
50
TereScope 1
September 2002
ML46508, Rev. 02
Table 5: DIP Switch Setting
DIP Switch Toggles
(2) Position
Function
100FULL
Set Port P1 to operate at 100 Mbps and in full-duplex mode.
AUTO
Set Port P1 to operate in auto-negotiation mode.
Note
The MC102/P operates at 100 Mbps in full-duplex mode at both ports.
Accordingly, the switch port connected to Port P1 must be able to operate
at 100 Mbps and in full-duplex mode.
Table 6: Front Panel LEDs
LED
Status
ON
OFF
ON
OFF
ON
OFF
ON
OFF
ON
P1 L
P1 A
P2 L
P2 A
LIN
OFF
Significance
Port P 1 link OK.
Port P 1 link absent or faulty.
Port P 1 activity12 present.
Port P 1 activity absent.
Port P 2 link OK.
Port P 2 link absent or faulty.
Port P 2 activity present.
Port P 2 activity absent.
Light signal from remote switch not being received at
Port P2 RX.
Light signal from remote switch being received at Port
P2 RX.
Ambient Temperature
The required ambient temperature ranges for the MC102/P are as follows:
Operating:
Storage:
0 to 40 °C
-10 to +50 °C
Mounting
The MC102/P is to be mounted on a wall or desktop (flat, stable, non-conductive
static-free surface).
Cabling
Fiberoptic
The yellow-sheathed fiber of a special MRV cable is connected to the TX
connector and the blue-sheathed fiber is connected to the RX connector.
12
transmission/reception
51
TereScope 1
ML46508, Rev. 02
September 2002
Electrical
The MC102/P’s electrical port is connected using an electrical cable with the
following specifications:
Type:
Straight-wired (for connection to a DTE, e.g., PC, etc.) or a crosswired (for connection to a DCE, e.g., switch, hub, etc.), Category 5,
STP or UTP, 2-pair – see Wiring below.
Length:
Up to 100m (330 ft)
Connector: RJ45 male 8-pin.
Wiring:
32.
The wiring of a straight- and cross-wired cable are shown in Figure
Figure 32: Cable Wiring
52
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