Instruction Manual SD-43 Optical-to-Electrical Converter

Instruction Manual SD-43 Optical-to-Electrical Converter
Instruction Manual
SD-43
Optical-to-Electrical Converter
071-0424-00
Copyright © Tektronix, Inc. All rights reserved.
Tektronix products are covered by U.S. and foreign patents, issued and pending. Information in this publication supercedes
that in all previously published material. Specifications and price change privileges reserved.
Printed in the U.S.A.
Tektronix, Inc., P.O. Box 1000, Wilsonville, OR 97070–1000
TEKTRONIX and TEK are registered trademarks of Tektronix, Inc.
WARRANTY
Tektronix warrants that the products that it manufactures and sells will be free from defects in materials and
workmanship for a period of one (1) year from the date of shipment. If a product proves defective during this
warranty period, Tektronix, at its option, either will repair the defective product without charge for parts and labor,
or will provide a replacement in exchange for the defective product.
In order to obtain service under this warranty, Customer must notify Tektronix of the defect before the expiration
of the warranty period and make suitable arrangements for the performance of service. Customer shall be
responsible for packaging and shipping the defective product to the service center designated by Tektronix, with
shipping charges prepaid. Tektronix shall pay for the return of the product to Customer if the shipment is to a
location within the country in which the Tektronix service center is located. Customer shall be responsible for
paying all shipping charges, duties, taxes, and any other charges for products returned to any other locations.
This warranty shall not apply to any defect, failure or damage caused by improper use or improper or inadequate
maintenance and care. Tektronix shall not be obligated to furnish service under this warranty a) to repair damage
resulting from attempts by personnel other than Tektronix representatives to install, repair or service the product;
b) to repair damage resulting from improper use or connection to incompatible equipment; c) to repair any
damage or malfunction caused by the use of non-Tektronix supplies; or d) to service a product that has been
modified or integrated with other products when the effect of such modification or integration increases the time
or difficulty of servicing the product.
THIS WARRANTY IS GIVEN BY TEKTRONIX IN LIEU OF ANY OTHER WARRANTIES, EXPRESS
OR IMPLIED. TEKTRONIX AND ITS VENDORS DISCLAIM ANY IMPLIED WARRANTIES OF
MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. TEKTRONIX’
RESPONSIBILITY TO REPAIR OR REPLACE DEFECTIVE PRODUCTS IS THE SOLE AND
EXCLUSIVE REMEDY PROVIDED TO THE CUSTOMER FOR BREACH OF THIS WARRANTY.
TEKTRONIX AND ITS VENDORS WILL NOT BE LIABLE FOR ANY INDIRECT, SPECIAL,
INCIDENTAL, OR CONSEQUENTIAL DAMAGES IRRESPECTIVE OF WHETHER TEKTRONIX OR
THE VENDOR HAS ADVANCE NOTICE OF THE POSSIBILITY OF SUCH DAMAGES.
Table of Contents
SD-43 Instruction Manual
General Safety Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Contacting Tektronix . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Getting Started . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
iii
v
1
Standard Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Optional Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2
2
2
3
Operating Basics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
8
Handling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Cleaning Optical Connectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Connecting Optical Signals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Attenuating Optical Signals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
8
8
9
10
Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Performance Verification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
11
13
Equipment Required . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Output Zero . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
DC Conversion Gain . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Noise Equivalent Power . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Bandwidth/Frequency Response . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
13
14
15
17
18
Replaceable Parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
21
i
Table of Contents
List of Figures
Figure 1: SD-43 front panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 2: Using the rigid connector (all sampling heads except
SD-32) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 3: Using the rigid connector and V-K adapter (SD-32
sampling head only) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 4: Front panel compartments in a CSA 803
Communications Signal Analyzer . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 5: Installation with optional power supply kit . . . . . . . . . . . . .
Figure 6: Typical responsivity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 7: Setup for frequency response measurement, SD-43
standard configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 8: SD-43 replaceable parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 9: Standard accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 10: Optional accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 11: Optional power cords . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
ii
1
5
5
6
7
12
19
21
22
22
22
SD-43 Instruction Manual
General Safety Summary
Review the following safety precautions to avoid injury and prevent damage to
this product or any products connected to it. To avoid potential hazards, use this
product only as specified.
Only qualified personnel should perform service procedures.
To Avoid Fire or
Personal Injury
Observe All Terminal Ratings. To avoid fire or shock hazard, observe all ratings
and markings on the product. Consult the product manual for further ratings
information before making connections to the product.
Do Not Operate Without Covers. Do not operate this product with covers or panels
removed.
Wear Eye Protection. Wear eye protection if exposure to high-intensity rays or
laser radiation exists.
Do Not Operate With Suspected Failures. If you suspect there is damage to this
product, have it inspected by qualified service personnel.
Do Not Operate in Wet/Damp Conditions.
Do Not Operate in an Explosive Atmosphere.
Keep Product Surfaces Clean and Dry.
Symbols and Terms
Terms in this Manual. These terms may appear in this manual:
WARNING. Warning statements identify conditions or practices that could result
in injury or loss of life.
CAUTION. Caution statements identify conditions or practices that could result in
damage to this product or other property.
Terms on the Product. These terms may appear on the product:
DANGER indicates an injury hazard immediately accessible as you read the
marking.
WARNING indicates an injury hazard not immediately accessible as you read the
marking.
CAUTION indicates a hazard to property including the product.
SD-43 Instruction Manual
iii
General Safety Summary
Symbols on the Product. The following symbols appear on the product:
CAUTION
Static Sensitive
iv
CAUTION
Refer to Manual
SD-43 Instruction Manual
Contacting Tektronix
Product
Support
For application-oriented questions about a Tektronix measurement product, call toll free in North America:
1-800-TEK-WIDE (1-800-835-9433 ext. 2400)
6:00 a.m. – 5:00 p.m. Pacific time
Or contact us by e-mail:
tm_app_supp@tek.com
For product support outside of North America, contact your
local Tektronix distributor or sales office.
Service
Support
Contact your local Tektronix distributor or sales office. Or visit
our web site for a listing of worldwide service locations.
http://www.tek.com
SD-43 Instruction Manual
For other
information
In North America:
1-800-TEK-WIDE (1-800-835-9433)
An operator will direct your call.
To write us
Tektronix, Inc.
P.O. Box 1000
Wilsonville, OR 97070-1000
v
Contacting Tektronix
vi
SD-43 Instruction Manual
Getting Started
The SD-43 is an optical-to-electrical (O/E) converter that converts an optical
input signal into an output voltage for display on either a high-speed oscilloscope or spectrum analyzer. The SD-43 O/E converter installs in any of the front
panel compartments of an 11800 Series Digital Sampling Oscilloscope, the
SM-11 Multichannel Unit, or the CSA 803 Communications Signal Analyzer. An
optional stand-alone power supply is also available for the SD-43 O/E converter
(see page 23).
Figure 1 shows the front panel of the SD-43 O/E converter.
Screw lock knob
Green LED (power)
Electrical signal
output connector
(K-connector)
Optical signal
input connector
(FC/PC)
Figure 1: SD-43 front panel
The SD-43 O/E converter has an FC/PC receptacle for optical signal input and a
K-style connector for electrical signal output.
The following list highlights the key performance characteristics of the SD-43
O/E converter:
H
700 to 1650 nm wavelength response
H
DC to ≥8 GHz optical bandwidth
H
≥ 20 mV/mW at 850 nm, ≥ 30 mV/mW at 1310 nm
For a complete list of specifications, see to page 11.
SD-43 Instruction Manual
1
Getting Started
Standard Accessories
The following accessories are standard with every SD-43 O/E converter:
H
Hard case
H
Instruction manual
H
FC/PC to FC/PC 62.5 mm multi-mode fiber jumper
H
FC/ST, FC/SC, and FC/FC hybrid connectors
H
Rigid U-cable for electrical sampling heads for the SD-20 Series
H
Protective SMA terminator (installed on the electrical output; SMA
terminator threads are compatible with K-style threads)
H
Certificate of traceable calibration
For a list of replaceable part numbers, see page 23.
Options
The following options are available at the time of purchase:
H
Opt D1
Calibration data
H
Opt D3
Three years calibration data (requires option C3)
H
Opt C3
Three years calibration services
H
Opt R3
Three years extended warranty
Optional Accessories
The following recommended accessories are available through Tektronix:
H
Fiber-optic cables and adapters with a variety of fiber types and connector
styles
H
90/10 single-mode optical splitter with FC/PC connectors
H
DIN to FC fiber-optic hybrid connector
H
10 dB in-line single-mode optical attenuator
H
Electrical filters for 622 Mbs and 155 Mbs
H
Stand-alone power supply
For a list of part numbers, see page 23.
2
SD-43 Instruction Manual
Getting Started
Installation
Follow the instructions in this section to install the SD-43 O/E converter into the
11800 Series Digital Sampling Oscilloscope or CSA 803 Communications
Signal Analyzer, or to connect it to the optional power supply for stand-alone
operation.
11800 or CSA 803 Series
On the 11800 Series Digital Sampling Oscilloscope or the CSA 803 Communications Signal Analyzer, the SD-43 O/E converter installs into any of the front
panel compartments.
NOTE. For the best performance, connect the SD-43 Optical-to-Electrical
Converter to the input of the sampling head using the rigid connector provided.
The sampling head must be in the compartment immediately to the right of the
O/E converter. See Figure 2 on page 5.
Choose one of the following Tektronix sampling heads to connect to the output
of the O/E converter:
H
SD-22 (recommended for lowest noise performance)
H
SD-24
H
SD-26
H
SD-30
H
SD-32 (requires a V-K adapter and rigid J-cable, see Figure 3 on page 5)
Use the following procedure to install the O/E converter and sampling head
modules:
CAUTION. The output of the O/E converter and the input of the sampling head
are subject to damage from electrostatic discharge (ESD). To prevent damage
from ESD, take the following precautions:
Always wear an anti-static wrist strap when handling a static sensitive
instrument.
Keep the short-circuit termination in place when moving or storing the
instrument. Remove the termination only to connect a cable.
Discharge the inner conductor of a loose, unterminated cable before connecting
it to the instrument.
SD-43 Instruction Manual
3
Getting Started
1. Switch off the measurement instrument.
2. Place the module in a compartment and slowly push it in with firm pressure.
3. Once the module is seated, turn the screw shaft on the plug-in to tighten the
module in place.
4. Switch on the measurement instrument and check that all modules have
power.
5. Remove the termination on the output of the O/E converter and connect the
output to the lower input of the sampling head as follows.
a. On all sampling heads except the SD-32, use the rigid connector and
install the shorter leg of the connector on the sampling head.
See Figure 2.
b. On the SD-32 sampling head, use the rigid connector and install the
shorter leg of the connector on the sampling head with a V-K adapter.
See Figure 3. (The V-K adapter is a standard accessory of the SD-32. If
you do not have a V-K adapter, refer to the list of optional accessories on
page 23.)
c. Carefully align the SMA connectors on both ends of the rigid cable.
d. To avoid damaging the connectors on the SD-43 or the sampling head,
alternately tighten the threads of each end of the rigid cable one turn at a
time until they are tight enough to use a wrench.
e. Tighten each nut lightly with a wrench. For best repeatability and to
prolong the life of SMA connectors, use a torque wrench and tighten
the connection to the range of 7 to 10 lb-in (79 to 112 N-cm).
4
SD-43 Instruction Manual
Getting Started
Sampling head
Shorter leg
Rigid U-cable
(174-3828-00)
O/E converter
Figure 2: Using the rigid connector (all sampling heads except SD-32)
SD-32 sampling head
V-K adapter
(011-0157-00)
Shorter leg
Rigid J-cable
(174-3976-00)
O/E converter
Figure 3: Using the rigid connector and V-K adapter (SD-32 sampling head only)
SD-43 Instruction Manual
5
Getting Started
NOTE. On the CSA803 series, the O/E converter will work in any of the
power-only or sampling head compartments, but the sampling head must be
installed in one of the two sampling head compartments on the right. See
Figure 4.
SD-43 or
sampling head
SD-43 only
(power-only
compartments)
Figure 4: Front panel compartments in a CSA 803 Communications Signal Analyzer
6
SD-43 Instruction Manual
Getting Started
Optional Power Supply
The optional power supply kit (Figure 5) allows the user to power the SD-43
O/E converter by itself. This allows the O/E converter to operate with other types
of measurement instruments independent of a CSA or 11800 series mainframe.
The part number for the kit is on page 23.
Figure 5: Installation with optional power supply kit
SD-43 Instruction Manual
7
Operating Basics
To prolong the life of the SD-43 O/E converter observe the following handling,
cleaning, and operating instructions.
Handling
Handle the SD-43 O/E converter carefully at all times.
CAUTION. To avoid damaging the SD-43 O/E converter, take the following
precautions:
Do not drop the SD-43 O/E converter since damage and misalignment of the
photodiode optical assembly can result. Store the SD-43 O/E converter in a
secure location when not in use.
Replace the protective caps on the input and output connectors when the SD-43
O/E converter is not in use.
WARNING. Do not look directly into any optical output port. Laser light can be
harmful to your eyes.
Cleaning Optical Connectors
Small dust particles and oils can easily contaminate optical connectors and
reduce or block the signal. Take care to preserve the integrity your connectors by
keeping them free of contamination.
CAUTION. To prevent loss of optical power or damage to the optical connectors,
keep the connectors clean at all times.
When cleaning the connectors with a swab, use gentle circular motions. Use only
high quality cleaning supplies that are non-abrasive and leave no residue.
To reduce the need for cleaning, immediately replace protective caps on the
optical connectors when not in use.
8
SD-43 Instruction Manual
Operating Basics
Equipment Required
Procedure
Use the following items to clean the optical connectors:
H
clean compressed air
H
fiber-optic cleaning swabs
H
isopropyl alcohol
To clean the optical connectors, follow these steps:
1. Hold the can of compressed air upright and spray the can into the air to purge
any propellant.
2. Spray the clean compressed air on the connectors to remove any loose
particles or moisture.
3. Moisten a clean optical swab with isopropyl alcohol and then lightly swab
the surfaces of the connectors.
4. Spray the clean compressed air on the connectors again to remove any loose
particles or isopropyl alcohol.
NOTE. Cleaning kits for optical connectors are available from a number of
suppliers.
Connecting Optical Signals
Attach the fiber optic cable with an FC/PC connector to the FC/PC input
receptacle as follows:
1. Carefully align the keyway on the receptacle with the key on the connector.
2. Tighten the nut lightly with finger pressure only.
The input of the SD-43 O/E converter can couple to optical fibers with a core
diameter of up to 62.5 mm. Alternate connector styles can be accommodated by
the use of an FC-FC jumper and the FC-FC, FC-ST, FC-SC adapters or hybrid
fiber optic jumper cables. (Refer to Optional accessories on page 23.)
CAUTION. To maintain the high performance (low return loss) of the optical
interface, connect an adapter and cable between the input of the SD-43 O/E
converter and the device under test. When you make connections to other
devices, leave the adapter and cable in place to protect the optical interface of
the SD-43 O/E converter from wear.
SD-43 Instruction Manual
9
Operating Basics
If you connect fiber cores larger than 62.5 mm, the SD-43 O/E converter may still
couple light, but the mismatch in core diameter will cause lower conversion gain
and higher insertion loss.
Attenuating Optical Signals
To keep the optical input power to an appropriate level, it may be necessary to
use an optical attenuator (such as the OA5022 Optical Attenuator) to attenuate
the optical signal.
CAUTION. To avoid damaging the optical input of the SD-43 O/E converter,
attenuate optical signals to less than 5 mW average power or 10 mW peak
power.
For linearity and measurement accuracy, attenuate the peak-to-peak swing of
signal to within the specified performance of 2 mWp-p.
WARNING. Do not look directly into any optical output port. Laser light can be
harmful to your eyes.
10
SD-43 Instruction Manual
Specifications
This section contains the specifications for the SD-43 Optical-to-Electrical
Converter. All specifications are guaranteed unless noted as “typical.” Typical
specifications are provided for your convenience but are not guaranteed.
Specifications marked with the n symbol have corresponding checks in the
Performance Verification section on page 13.
Table 1: SD-43 Specifications
Specification
Description
Effective wavelength range, typical
700 nm to 1650 nm
n DC conversion gain
≥ 17 mV / mW at 780 nm ± 20 nm, ≥ 20 mV / mW at 850 nm ± 20 nm
≥ 30 mV / mW at 1310 nm ± 20 nm and ≥ 25 mV / mW at 1550 nm ± 20 nm
Relative responsivity, typical
See Figure 6
Absolute maximum nondestructive optical
input
5 mW average power; 10 mW peak power at wavelength with highest relative
responsivity
n Bandwidth
DC to ≥8 GHz (– 6 dB electrical power into 50 W) for signals < 2 mWp-p
Input fiber diameter
Accepts 62.5 mm multi-mode diameter; Numerical Aperture (NA) ≤ 0.27
Internal fiber diameter
core: 62.5 mm multi-mode fiber
cladding: 125 mm
Fiber connector style
female FC/PC
Optical return loss
> 14 dB minimum for external mating fibers 62.5 mm core or smaller and PC mating style
n Noise equivalent power
≤ 15 pWń ǸHz electrical output noise when terminated into 50 W
Impulse response width
≤ 48 ps FWHM (Full Width Half Maximum)
Aberrations
≤ 10%p-p total
n Output zero
≤ 1 mV
External termination impedance
50 W ± 2 W
Output impedance, typical
1 kW
Temperature
Operating: +10_ C to +40_ C
Non-operating: –22_ C to +60_ C
Humidity
75% non-condensing
Altitude
Operating: 4,572 m (15,000 ft)
Non-operating: 15,240 m (50,000 ft)
SD-43 Instruction Manual
11
Specifications
0.8
0.7
Responsivity (A/W)
0.6
0.5
0.4
0.3
0.2
0.1
0
600
700
800
900
1000
1100
1200
1300
1400
1500
1600
Wavelength (nanometers)
Figure 6: Typical responsivity
Table 2: Certifications and compliances
Category
Standards or description
EC Declaration of Conformity –
EMC
Meets intent of Directive 89/336/EEC for Electromagnetic Compatibility. Compliance was
demonstrated to the following specifications as listed in the Official Journal of the European Union:
Australia/New Zealand
Declaration of Conformity – EMC
EN 55011
Class A Radiated and Conducted Emissions
IEC 1000-3-2
AC Power Line Harmonic Emissions
EN 50082-1 Immunity:
IEC 1000-4-2
IEC 1000-4-3
IEC 1000-4-4
IEC 1000-4-5
IEC 1000-4-6
IEC 1000-4-11
Electrostatic Discharge Immunity
RF Electromagnetic Field Immunity
Electrical Fast Transient/Burst Immunity
Power Line Surge Immunity
Conducted RF Immunity
Voltage Dips/Interruptions Immunity
Complies with EMC provision of Radiocommunications Act per the following standard(s):
AN/NZS 2064.1/2
12
Industrial, Scientific, and Medical Equipment: 1992
SD-43 Instruction Manual
Performance Verification
Use the following procedures to verify the warranted specifications of the SD-43
Optical-to-Electrical Converter. Before beginning these procedures, see page 20;
photocopy the test record and use it to record the performance test results. The
recommended calibration interval is one year.
These procedures test the following specifications:
H
Output zero
H
DC conversion gain
H
Noise equivalent power
H
Bandwidth/frequency response (for characterization purposes only)
Equipment Required
Table 3 lists the equipment required to perform the performance verification
procedure. The types and quantities of connectors may vary depending on the
specific equipment you use.
Table 3: Test equipment
SD-43 Instruction Manual
Description
Minimum requirements
Example product
Optical power meter with
head and adapters
Accuracy ± 3%,
Dynamic range > 0 dbM to
–50 dbM,
Max power > 1 mW, calibrated
from 700 nm – 1650 nm
Tektronix TFC 200
780 nm cal source
output > 200 W (CW)1,
stability > 0.1 dB over 5 minutes
BCP 400 A-0XXT-239
850 nm cal source
output > 200 W (CW)1,
stability > 0.1 dB over 5 minutes
BCP 400 A-1XXT-239
1310 nm cal source
output > 200 W (CW)1,
stability ± 0.1 dB over 5 minutes
BCP 400 A-2XXT-239
1550 nm cal source
output > 200 W (CW)1,
stability ± 0.1 dB over 5 minutes
BCP 400 A-3XXT-239
RF power meter
noise < .1 mV, BW > 4 GHz
HP 436A with power sensor
HP 8484A
1300 or 1550 nm impulse
generator
pulse width < 2 ps
Calmar Optcom FPL-01
1550 nm impulser
13
Performance Verification
Table 3: Test equipment (cont.)
Description
Minimum requirements
Sampling oscilloscope with
sampling head
Example product
11K (1180X, CSA80xX with
SD-32 sampling head, V-K
adapter and rigid cable.
Option RR also requires the
SD-22 sampling head.)
V–K adapter
for use with SD-32 sampling head
011-0157-00
Rigid cable
for use with SD-32 sampling head
174-3976-00
Reference receiver for
trigger source
trigger signal for sampling oscilloscope
10/90 or 50/50 splitter with
ORR24 or P6703B and
1103 TEKPROBE Power
Supply
PC with GPIB port and
printer
printer output of sampled waveforms
Two adjustable multi-mode
optical attenuators
4 decades, 62.5 mm core fiber,
FC-style connectors
Tektronix OA5022
Digital voltmeter
4 1/2 digit
Tektronix TX3, TX1
50 W termination
± 1%
011-0049-01
BNC-to-banana adapter
BNC female to dual banana
103-0090-00
Optical cable (3)
FC-FC multi-mode, 62.5 mm, 2
meters
174-2322-00
Inline optical adapter
FC female to FC female
131-5039-00
1
CW and modulated mode available: modulation with OFF level at or below 0.1 mW,
optical falltime < 1 ms
The SD-43 O/E converter under test and the test equipment should be warmed up
for 20 minutes at an ambient temperature between 20 and 30_ C.
Output Zero
1. Attach the output of the SD-43 O/E converter to the voltmeter inputs with a
50 W termination and BNC-to-banana adapter.
2. Install the optical dust cover on the input of the SD-43 O/E converter.
3. Check that output voltage is ≤ ± 1 mV. Record the result on the test record.
14
SD-43 Instruction Manual
Performance Verification
DC Conversion Gain
NOTE. Make sure that the optical connector ends of both the fiber from the
optical attenuator output and the SD-43 under test input fiber are well cleaned
before performing this step. See the cleaning instructions on page 8.
1. Connect the 1310 nm laser source to attenuator input.
NOTE. The longer wavelength of 1310 nm in single mode fiber is sensitive to
loss in fiber due to bending of the fiber. The fiber bend radius of the SD-43 fiber
input should lay with >1.5 inch bend radius along the fiber’s entire length.
Although this precaution must be maintained throughout the entire performance
verification procedure, it is especially important for this step in order to
accurately adjust and measure the DC conversion gain of the SD-43.
2. Connect the optical attenuator output to the optical power meter using multi
mode optical cable with FC connectors. Use the appropriate optical power
meter sensing head with calibrated measurement for a wavelength span
including 1550 nm, 1310 nm, 780 nm, and 850 nm. Be sure the optical
power meter wavelength setting and optical attenuator setting is at 1310 nm.
Enable the optical output.
3. Adjust attenuator or the optical source so that the power meter reads
200mW.
4. Move the FC fiber end (the one now adjusted to 200 mW average power)
from the optical power meter and connect it to the SD-43 input under test.
5. Attach a voltmeter with 50 W termination to SD-43 O/E converter output.
6. Record the voltmeter reading. The 1310 nm Conversion Gain in units of
V/mW is
(voltmeter reading) × 5
7. Record the 1310 nm conversion gain on the test record.
8. Disconnect the 1310 nm laser from the optical attenuator, and reconnect the
780 nm laser source. Set the optical attenuator to the correct wavelength.
NOTE. Do not disturb the fiber connection between the optical attenuator output
and the SD-43 O/E converter input.
9. Adjust the optical attenuator until the voltmeter reading is the same as in
step 6 above ± 1%.
SD-43 Instruction Manual
15
Performance Verification
10. Without moving the optical attenuator from the position in the previous step,
disconnect the output fiber of the optical attenuator from the input of the
SD-43 and insert the optical attenuator output into the optical power meter.
11. Adjust the optical power meter to the calibrated wavelength setting of
780 nm. Note the absolute power displayed. The 780 nm conversion gain in
units of V/mWopt is
((200 mW) / (measured 780 power)) × (1310 nm conversion gain)
12. Record the 780 nm conversion gain on the test record.
13. Disconnect the 780 nm laser from the optical attenuator, and connect the
850 nm laser source. Set the optical attenuator to the correct wavelength.
14. Connect the attenuator output to the voltmeter.
NOTE. Do not disturb the fiber connection between the optical attenuator output
and the SD-43 input.
15. Adjust the optical attenuator until the voltmeter reading is the same as in
step 6 above, ± 1%.
16. Without moving the optical attenuator from the position in the previous step,
disconnect the optical attenuator output fiber from the input of the SD-43
and then insert the fiber into the optical power meter.
17. Adjust the optical power meter to the calibrated wavelength setting of
850 nm. Note the absolute power displayed. The 850 nm conversion gain in
units of V/mWopt is
((200 mW) / (measured 850 power)) × (1310 nm conversion gain)
18. Record the 850 nm conversion gain on the test record.
19. Disconnect the 850 nm laser from the optical attenuator, and connect the
1550 nm laser source. Set the optical attenuator to the correct wavelength.
20. Connect the attenuator output to the voltmeter.
NOTE. Do not disturb the fiber connection between the optical attenuator output
and the SD-43 input.
21. Adjust the optical attenuator until the voltmeter reading is the same as in
step 6 above, ± 1%.
16
SD-43 Instruction Manual
Performance Verification
22. Without moving the optical attenuator from the position in the previous step,
disconnect the output fiber of the optical attenuator from the input of the
SD-43 and insert the optical attenuator output into the optical power meter.
23. Adjust the optical power meter to the calibrated wavelength setting of
1550 nm. Note the absolute power displayed. The 1550 nm conversion gain
in units of V/mWopt is
((200 mW) / (measured 1550 power)) × (1310 nm conversion gain)
24. Record the 1550 nm conversion gain on the test record.
Noise Equivalent Power
Power the SD-43 O/E converter under test using an 11801 DSO or the stand
alone power supply.
1. Zero the RF power meter.
2. Connect the SD-43 O/E converter electrical output to the RF power meter.
3. With the dust cover on the input to the SD-43 O/E converter, the power
meter should read less than
Ǹ18 GHz
[(15 pW opt ń ǸHz )
+ 8.1
10 –14
(measured conversion gain in VńW opt)] 2
50 W
(measured conversion gain in VńW opt) 2
+ W elec
(NOTE : VńW opt + VńmW opt
1000)
Example : 18 VńW opt (or 0.018 VńmW) + measured conversion gain
W elec + 8.1
10 –14
+ 2.6
10 –11
(18 VńW opt) 2
+ 26 pW
4. Record the measured and calculated results on the test record.
SD-43 Instruction Manual
17
Performance Verification
Bandwidth/Frequency Response
NOTE. The performance of every component of your setup has an affect on the
overall performance of your system. This procedure allows you to characterize
and plot the performance of your particular setup which includes the channel of
your sampling oscilloscope, the sampling head, the SD-43 O/E Converter, the
electrical cable, and the filter (if any).
To optimize performance, make sure that all connections are clean and secure
and that all components of the system are in good condition. Optical fiber, in
particular, can gradually degrade the system performance as it is repeatedly
flexed over time.
1. Connect the output of the optical impulse generator to the 10 dB inline
attenuator, 90/10 splitter, and optical attenuators as shown in Figure 7. Start
with about 30 dB of attenuation on both variable attenuators.
NOTE. To avoid dispersing the narrow optical impulse signal, keep all fiber
lengths as short as possible. Lengths that are 2 to 3 meters long are acceptable.
2. Before you connect the attenuator to the ORR24, you must adjust the signal
on the 10% path to the proper level. To measure the output of the attenuator
on the 10% path, you can use another oscilloscope or you can use an optical
power meter.
a. If you are using another oscilloscope to display the trigger signal, adjust
the attenuation of the 10% path until the ORR24 produces more than
200 mVp-p, but less than 1 Vp-p impulse response.
b. If you are using an optical power meter, connect the output of the optical
attenuator on the 10% path to the optical power meter. With a pulse
width of 500 fs and a frequency of 10 MHz, adjust the optical
attenuator until the power meter reads about 1 mW average power.
Finish connecting the setup as follows:
3. For an SD-43 with the standard configuration, finish connecting the setup as
shown in Figure 7. Note that the setup requires an SD-32 sampling head.
18
SD-43 Instruction Manual
Performance Verification
Optical Split
Optical
Impulse
Generator
Splitter fiber input
10%
90%
Split 90% out fiber
10dB attenuator
Split 10% out fiber
V–K adapter
SD-43
In
Out
Variable optical
attenuator
J–cable
(174-3976-00)
SD32
Tek 1180X
or CSA80X
scope
ORR24
In
Out
SMA–cable
Ext Trig input
Variable optical
attenuator
Figure 7: Setup for frequency response measurement, SD-43 standard configuration
4. Set the trigger point midway on the rising edge of the trigger signal.
5. Adjust the attenuation of the 90% path until the SD-43 produces more than
30 mVp-p, but less than 80 mVp-p impulse response.
6. Locate and center the first impulse (after time zero) on the oscilloscope
display. (For a 10 MHz repetition rate, the impulse should occur at about
100 ns. You may experience signal jitter if you try to display a signal that is
not the first impulse and is late in relation to time zero.)
Finish setting the oscilloscope controls as follows:
7. For an SD-43 with the standard configuration, set the horizontal time to 100
ps/div, set the vertical controls for maximum screen usage, and set the signal
averaging to 64 times and 2048 points.
8. Using a controller (for example, a PC, MAC, workstation, etc.) attached to
the scope via GPIB, download the waveform.
9. Using the available controller software (for example, Labview, etc.) perform
an FFT (Fast Fourier Transform) on the waveform; this transforms the
time-domain (1024-point) impulse response to a scalar frequency response.
10. Normalize the FFT result such that DC or low frequency is 0 dB.
11. Plot the frequency response.
12. Check that the frequency response from DC to 8 GHz is greater than or equal
to –6 dB where dB = 20log (Vlog/Vdc) for electrical power into 50 W.
This completes the performance verification procedure.
SD-43 Instruction Manual
19
Performance Verification
Test record
Model/Serial Number:
Temperature:
Date of Calibration:
Certificate Number:
RH %:
Technician:
Performance test
Minimum
Measured
Maximum
Output zero
N/A
±1 mV
DC conversion gain
at 1310 nm ± 20 nm
0.030 V/mW
N/A
DC conversion gain
at 780 nm ± 20 nm
0.017 V/mW
N/A
DC conversion gain
at 850 nm ± 20 nm
0.020 V/mW
N/A
DC conversion gain
at 1550 nm ± 20 nm
0.025 V/mW
N/A
Noise equivalent power
N/A
_______Welec
(calculated)
Bandwidth DC to 8 GHz
– 6 dB
20
(attach plot)
N/A
SD-43 Instruction Manual
Replaceable Parts
For information about replaceable parts, contact your Tektronix sales representative.
3
1
2
Figure 8: SD-43 replaceable parts
SD-43 Instruction Manual
21
Replaceable Parts
1
2
3
4
5
Figure 9: Standard accessories
2
4
3
1
5
6
7
Figure 10: Optional accessories
1
2
3
4
5
Figure 11: Optional power cords
22
SD-43 Instruction Manual
Replaceable Parts
Replaceable parts list
Fig. &
index
number
Tektronix
part number
8–1
211–0062–00
–2
200–3658–00
–3
015–1020–00
1
Serial no.
effective
Serial no.
discont’d
Qty
Name & description
Mfr. code
Mfr. part number
1
SCREW,MACHINE:2–56 X 0.312,PNH,STLCD PL,POZ
93907
ORDER BY DESCRIP
1
COVER,CONNECTOR:FC,W/CHAIN
80009
200–3658–00
TERM,COAXIAL:SHORT CIRCUIT,SMA
0GZV8
64SMA–50–0–1
Standard accessories
9–1
131–6252–00
1
CONN:FC TO FC SQUARE MOUNT
ADAPTER,W/ZIRCONIA CERAMIC SLEEVE
0C5R7
CO92290
–2
131–6250–00
1
CONN:FC TO ST ADAPTER W/ZIRCONIA CERAMIC
SLEEVE
0C5R7
C032980
–3
131–6251–00
1
CONN:SC TO FC SQUARE FLANGE ADAPTER
W/ZIRCONIA CERAMIC SLEEVE
0C5R7
C002453
–4
174–2322–00
1
CA ASSY FBR OPT:MM 2ML FC/PC TO FC/PC
05JW7
174–2322–00
–5
174–3828–00
1
CA ASSY,RF:COAXIAL,RFS,50 OHM, SMA X SMA
060D9
174–3828–00
016–0156–03
1
CASE,CARRYING:PROBE CARRYING CASE,
0KB01
OBD
071–0424–00
1
MANUAL,TECH:INSTRUCTION
80009
071–0424–00
10–1
016–1609–00
1
POWER CORD KIT:ADAPTER CABLE & US POWER
CORD
80009
016–1609–00
–2
119–5118–00
1
ATTEN,OPTICAL:30MM,L10DBFOR 1310/1550NM,FC
CONN.FA100–35–10–HP
0LK97
FA100–35–10–HP
–3
015–0565–00
1
POWER DIVIDER:50 OHM,3 SMA,FEMALE CONN
64537
D293S
015–1014–00
1
PWR DIVIDER,RES:50 OHM,SMA
64537
D241S
–4
020–2209–00
1
ACCESSORY KIT:CONNECTOR,OPTICAL,DIN RCPT
TO FC SQUARE MOUNT ADAPTER,
80009
020–2209–00
–5
174–3737–00
1
FIBER OPTIC:COUPLER, 1 X 2 SPLITTER,
WAVELENGTH INDEPENDENT, 90/10 RATIO, ATT.
0.1 DB, REFLE
0C5R7
C166893
–6
119–5929–00
1
FILTER,RFI:LOW PASS,467MHZ –3DB,622.08
MBPS,INS LOSS < 0.02 DB,VMAX=50V,IMAX=1A,50
OHM
80009
119–5929–00
119–5936–00
1
FILTER,RFI:LOW PASS,117MHZ –3DB,155.52
MBPS,INS LOSS < 0.02 DB,VMAX=50V,IMAX=1A,50
OHM,SDH
80009
119–5936–00
174–4093–00
1
JUMPER,FIBER:OPTIC,62.5UM MULTIMODE,2
METER,SIMPLEX,FC/PC TO SC/PC,ORS20
0CKD9
S2–7YM–2–FIS
Optional accessories
–7
Optional Power Cords
11–1
161–0066–09
1
CA ASSY,PWR:3,0.75MM SQ,250V/10A,99
INCH,STR,IEC320,RCPT,EUROPEAN,
2W733
ORDER BY
DESCRIPTION
–2
161–0066–10
1
CA ASSY,PWR:3,1.0 MM SQ,250V/10A,2.5
METER,STR,IEC320,RCPT X 13A,FUSED UK
PLUG(13A FUSE),UNI
TK2541
ORDER BY
DESCRIPTION
–3
161–0066–11
1
CA ASSY,PWR:3,1.0MM SQ,250V/10A,2.5
METER,STR,IEC320,RCPT,AUSTRALIA
80126
ORDER BY
DESCRIPTION
SD-43 Instruction Manual
23
Replaceable Parts
Replaceable parts list (cont.)
Fig. &
index
number
Tektronix
part number
Serial no.
effective
Serial no.
discont’d
Qty
Name & description
Mfr. code
Mfr. part number
–4
161–0066–12
1
CA ASSY,PWR:3,18 AWG,250V/10A,98
INCH,STR,IEC320,RCPT X NEMA 6–15P,US
S3109
ORDER BY
DESCRIPTION
–5
161–0154–00
1
CA ASSY,PWR:3,1.0MM SQ,250V/10A,2.5
METER,STR,IEC320,RCPT,SWISS
5F520
86515030
Manufacturers cross index
Mfr.
code
Manufacturer
Address
City, state, zip code
05JW7
PURDY ELECTRONICS CORP
INTEROPTIC DIVISION
720 PALOMAR AVE
SUNNYVALE, CA 94086
060D9
UNITREK CORPORATION
3000 COLUMBIA HOUSE BLVD,
SUITE 120
VANCOUVER, WA 98661
0C5R7
ALCOA FUJIKURA LTD
150 RIDGEVIEW CIRCLE
DUNCAN, SC 29334
0CKD9
FIBER INSTRUMENT SALES INC
161 CLEAR ROAD
ORISKANY, NY 13424
0GZV8
HUBER & SUHNER INC
19 THOMPSON DRIVE
ESSEX JUNCTION, VT 05452–3408
0KB01
STAUFFER SUPPLY CO
810 SE SHERMAN
PORTLAND, OR 97214–4657
0LK97
JDS FITEL INC
570 WEST HUNT CLUB RD
NEPEAN, ONTARIO CA ONTARIO K2G 5W8
2W733
BELDEN WIRE & CABLE COMPANY
2200 US HWY 27 SOUTH
PO BOX 1980
RICHMOND, IN 47374
5F520
PANEL COMPONENTS CORP
PO BOX 115
OSKALOOSA, IA 52577–0115
64537
KDI/TRIANGLE ELECTRONICS INC
60 S JEFFERSON RD
WHIPPANY, NJ 07981
80009
TEKTRONIX INC
14150 SW KARL BRAUN DR
PO BOX 500
BEAVERTON, OR 97077–0001
80126
PACIFIC ELECTRICORD CO
747 WEST REDONDO BEACH
PO BOX 10
GARDENA, CA 90247–4203
93907
CAMCAR DIV OF TEXTRON INC
ATTN: ALICIA SANFORD
516 18TH AVE
ROCKFORD, IL 611045181
S3109
FELLER U.S. CORPORATION
72 VERONICA AVE
UNIT #4
SOMERSET, NJ 08873
TK2541
AMERICOR ELECTRONICS LTD
UNIT–H
2682 W COYLE AVE
ELK GROVE VILLAGE, IL 60007
24
SD-43 Instruction Manual
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