Instruction Manual
SD-43
Optical-to-Electrical Converter
071-0424-00
Copyright © T ektronix, Inc. All rights reserved.
T ektronix 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.
T ektronix, Inc., P.O. Box 1000, Wilsonville, OR 97070–1000
TEKTRONIX and TEK are registered trademarks of T ektronix, Inc.
WARRANTY
T ektronix 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, T ektronix, 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 T ektronix, 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 T ektronix 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. T ektronix shall not be obligated to furnish service under this warranty a) to repair damage
resulting from attempts by personnel other than T ektronix 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-T ektronix 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 CUST OMER 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
General Safety Summary iii. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Contacting Tektronix v. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Getting Started 1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Standard Accessories 2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Options 2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Optional Accessories 2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Installation 3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Operating Basics 8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Handling 8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Cleaning Optical Connectors 8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Connecting Optical Signals 9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Attenuating Optical Signals 10. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Specifications 11. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Performance Verification 13. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Equipment Required 13. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Output Zero 14. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
DC Conversion Gain 15. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Noise Equivalent Power 17. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Bandwidth/Frequency Response 18. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Replaceable Parts 21. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
SD-43 Instruction Manual
i
Table of Contents
List of Figures
Figure 1: SD-43 front panel 1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 2: Using the rigid connector (all sampling heads except
SD-32) 5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 3: Using the rigid connector and V-K adapter (SD-32
sampling head only) 5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 4: Front panel compartments in a CSA 803
Communications Signal Analyzer 6. . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 5: Installation with optional power supply kit 7. . . . . . . . . . . . .
Figure 6: Typical responsivity 12. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 7: Setup for frequency response measurement, SD-43
standard configuration 19. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 8: SD-43 replaceable parts 21. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 9: Standard accessories 22. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 10: Optional accessories 22. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 11: Optional power cords 22. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
ii
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
Symbols and Terms
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 .
T erms 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.
SD-43 Instruction Manual
CAUTION. Caution statements identify conditions or practices that could result in
damage to this product or other property.
T erms 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.
iii
General Safety Summary
Symbols on the Product. The following symbols appear on the product:
CAUTION
Static Sensitive
CAUTION
Refer to Manual
iv
SD-43 Instruction Manual
Contacting Tektronix
Product
Support
Service
Support
For other
information
To write us Tektronix, Inc.
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.
Contact your local Tektronix distributor or sales office. Or visit
our web site for a listing of worldwide service locations.
http://www.tek.com
In North America:
1-800-TEK-WIDE (1-800-835-9433)
An operator will direct your call.
P.O. Box 1000
Wilsonville, OR 97070-1000
SD-43 Instruction Manual
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
Optional Accessories
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
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
Installation
Getting Started
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:
SD-43 Instruction Manual
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.
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
O/E converter
Getting Started
Sampling head
Shorter leg
Rigid U-cable
(174-3828-00)
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
SD-43 Instruction Manual
Figure 3: Using the rigid connector and V-K adapter (SD-32 sampling head only)
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
Handling
To prolong the life of the SD-43 O/E converter observe the following handling,
cleaning, and operating instructions.
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 mW
p-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.
T able 1: SD-43 Specifications
Specification Description
Effective wavelength range, typical 700 nm to 1650 nm
n DC conversion gain
Relative responsivity, typical See Figure 6
Absolute maximum nondestructive optical
input
n Bandwidth
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
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
≥ 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
5 mW average power; 10 mW peak power at wavelength with highest relative
responsivity
DC to ≥8 GHz (– 6 dB electrical power into 50 W) for signals < 2 mW
cladding: 125 mm
p-p
n Noise equivalent power
Impulse response width ≤ 48 ps FWHM (Full Width Half Maximum)
Aberrations ≤ 10%
n Output zero
External termination impedance 50 W ± 2 W
Output impedance, typical 1kW
Temperature Operating: +10_ C to +40_ C
Humidity 75% non-condensing
Altitude Operating: 4,572 m (15,000 ft)
≤ 15 pWń HzǸelectrical output noise when terminated into 50 W
total
p-p
≤ 1 mV
Non-operating: –22_ C to +60_ C
Non-operating: 15,240 m (50,000 ft)
SD-43 Instruction Manual
11
Specifications
0.8
0.7
0.6
0.5
0.4
0.3
Responsivity (A/W)
0.2
0.1
0
700 800 900 1000 1100 1200 1300 1400 1500
600 1600
Figure 6: Typical responsivity
T able 2: Certifications and compliances
Category Standards or description
EC Declaration of Conformity –
EMC
Australia/New Zealand
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:
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 Electrostatic Discharge Immunity
IEC 1000-4-3 RF Electromagnetic Field Immunity
IEC 1000-4-4 Electrical Fast Transient/Burst Immunity
IEC 1000-4-5 Power Line Surge Immunity
IEC 1000-4-6 Conducted RF Immunity
IEC 1000-4-11 Voltage Dips/Interruptions Immunity
Complies with EMC provision of Radiocommunications Act per the following standard(s):
AN/NZS 2064.1/2 Industrial, Scientific, and Medical Equipment: 1992
Wavelength (nanometers)
12
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.
T able 3: Test equipment
Description Minimum requirements Example product
Optical power meter with
head and adapters
780 nm cal source output > 200 W (CW)1,
850 nm cal source output > 200 W (CW)1,
1310 nm cal source output > 200 W (CW)1,
1550 nm cal source output > 200 W (CW)1,
RF power meter noise < .1 mV , BW > 4 GHz HP 436A with power sensor
1300 or 1550 nm impulse
generator
Accuracy ± 3%,
Dynamic range > 0 dbM to
–50 dbM,
Max power > 1 mW, calibrated
from 700 nm – 1650 nm
stability > 0.1 dB over 5 minutes
stability > 0.1 dB over 5 minutes
stability ± 0.1 dB over 5 minutes
stability ± 0.1 dB over 5 minutes
pulse width < 2 ps Calmar Optcom FPL-01
Tektronix TFC 200
BCP 400 A-0XXT-239
BCP 400 A-1XXT-239
BCP 400 A-2XXT-239
BCP 400 A-3XXT-239
HP 8484A
1550 nm impulser
SD-43 Instruction Manual
13
Performance Verification
T able 3: Test equipment (cont.)
Description Example productMinimum requirements
Sampling oscilloscope with
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
11K (1180X, CSA80xX with
SD-32 sampling head, V-K
adapter and rigid cable.
Option RR also requires the
SD-22 sampling head.)
Reference receiver for
trigger source
PC with GPIB port and
printer
Two adjustable multi-mode
optical attenuators
Digital voltmeter 4 1/2 digit Tektronix TX3, TX1
50 W termination ± 1% 01 1-0049-01
BNC-to-banana adapter BNC female to dual banana 103-0090-00
Optical cable (3) FC-FC multi-mode, 62.5 mm, 2
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
trigger signal for sampling oscilloscope
printer output of sampled waveforms
4 decades, 62.5 mm core fiber,
FC-style connectors
meters
10/90 or 50/50 splitter with
ORR24 or P6703B and
1103 TEKPROBE Power
Supply
T ektronix OA5022
174-2322-00
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
14
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.
SD-43 Instruction Manual
DC Conversion Gain
Performance Verification
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/mW
opt
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/mW
opt
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
Noise Equivalent Power
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/mW
opt
is
((200 mW) / (measured 1550 power)) × (1310 nm conversion gain)
24. Record the 1550 nm conversion gain on the test record.
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
[(15 pW
+ 8.1 10
+ W
(NOTE : VńW
ń HzǸ) 18 GHzǸ (measured conversion gain in VńW
opt
–14
(measured conversion gain in VńW
elec
+ VńmW
opt
Example : 18 VńW
W
+ 8.1 10
elec
+ 2.6 10
+ 26 pW
50 W
2
)
opt
1000)
opt
(or 0.018 VńmW) + measured conversion gain
opt
–14
(18 V ńW
–11
opt
2
)
opt
2
)]
SD-43 Instruction Manual
4. Record the measured and calculated results on the test record.
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 mV
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.
, but less than 1 V
p-p
impulse response.
p-p
18
SD-43 Instruction Manual
Performance Verification
Optical
Impulse
Generator
Splitter fiber input Split 90% out fiber
10dB attenuator
Split 10% out fiber
Optical Split
10%
Variable optical
Variable optical
attenuator
90%
attenuator
SD-43
In Out
ORR24
In Out
J–cable
(174-3976-00)
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 mV
, but less than 80 mV
p-p
impulse response.
p-p
V–K adapter
SD32
Tek 1180X
or CSA80X
scope
Ext Trig inputSMA–cable
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 (V
log/Vdc
) for electrical power into 50 W.
SD-43 Instruction Manual
This completes the performance verification procedure.
19
Performance Verification
T est record
Model/Serial Number: Certificate Number:
Temperature: RH %:
Date of Calibration: 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
Bandwidth DC to 8 GHz – 6 dB (attach plot) N/A
N/A _______W
(calculated)
elec
20
SD-43 Instruction Manual
Replaceable Parts
For information about replaceable parts, contact your Tektronix sales representative.
1
Figure 8: SD-43 replaceable parts
3
2
SD-43 Instruction Manual
21
Replaceable Parts
1 2 3 4
Figure 9: Standard accessories
5
2
1
5
3
6
4
Figure 10: Optional accessories
1
Figure 11: Optional power cords
7
2
3
4
5
22
SD-43 Instruction Manual
Replaceable Parts
Replaceable parts list
Fig. &
index
number
8–1 211–0062–00 1 SCREW,MACHINE:2–56 X 0.312,PNH,STLCD PL,POZ 93907 ORDER BY DESCRIP
–2 200–3658–00 1 COVER,CONNECTOR:FC,W/CHAIN 80009 200–3658–00
–3 015–1020–00 1 TERM,COAXIAL:SHORT CIRCUIT,SMA 0GZV8 64SMA–50–0–1
9–1 131–6252–00 1 CONN:FC TO FC SQUARE MOUNT
–2 131–6250–00 1 CONN:FC TO ST ADAPTER W/ZIRCONIA CERAMIC
–3 131–6251–00 1 CONN:SC TO FC SQUARE FLANGE ADAPTER
–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
10–1 016–1609–00 1 POWER CORD KIT :ADAPTER CABLE & US POWER
–2 119–51 18–00 1 ATTEN,OPTICAL:30MM,L10DBFOR 1310/1550NM,FC
–3 015–0565–00 1 POWER DIVIDER:50 OHM,3 SMA,FEMALE CONN 64537 D293S
–4 020–2209–00 1 ACCESSORY KIT:CONNECTOR,OPTICAL,DIN RCPT
–5 174–3737–00 1 FIBER OPTIC:COUPLER, 1 X 2 SPLITTER,
–6 119–5929–00 1 FILTER,RFI:LOW PASS,467MHZ –3DB,622.08
–7 174–4093–00 1 JUMPER,FIBER:OPTIC,62.5UM MULTIMODE,2
Tektronix
part number
016–0156–03 1 CASE,CARRYING:PROBE CARRYING CASE, 0KB01 OBD
071–0424–00 1 MANUAL,TECH:INSTRUCTION 80009 071–0424–00
015–1014–00 1 PWR DIVIDER,RES:50 OHM,SMA 64537 D241S
119–5936–00 1 FILTER,RFI:LOW PASS,117MHZ –3DB,155.52
Serial no.
effective
Serial no.
discont’d
Qty Name & description Mfr. code Mfr. part number
Standard accessories
0C5R7 CO92290
ADAPTER,W/ZIRCONIA CERAMIC SLEEVE
0C5R7 C032980
SLEEVE
0C5R7 C002453
W/ZIRCONIA CERAMIC SLEEVE
Optional accessories
80009 016–1609–00
CORD
0LK97 FA100–35–10–HP
CONN.FA100–35–10–HP
80009 020–2209–00
TO FC SQUARE MOUNT ADAPTER,
0C5R7 C166893
WA VELENGTH INDEPENDENT, 90/10 RATIO, ATT .
0.1 DB, REFLE
80009 119–5929–00
MBPS,INS LOSS < 0.02 DB,VMAX=50V,IMAX=1A,50
OHM
80009 119–5936–00
MBPS,INS LOSS < 0.02 DB,VMAX=50V,IMAX=1A,50
OHM,SDH
0CKD9 S2–7YM–2–FIS
METER,SIMPLEX,FC/PC TO SC/PC,ORS20
Optional Power Cords
11–1 161–0066–09 1 CA ASSY,PWR:3,0.75MM SQ,250V/10A,99
INCH,STR,IEC320,RCPT,EUROPEAN,
–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
–3 161–0066–11 1 CA ASSY,PWR:3,1.0MM SQ,250V/10A,2.5
METER,STR,IEC320,RCPT,AUSTRALIA
SD-43 Instruction Manual
2W733 ORDER BY
DESCRIPTION
TK2541 ORDER BY
DESCRIPTION
80126 ORDER BY
DESCRIPTION
23
Replaceable Parts
Replaceable parts list (cont.)
Fig. &
index
number
–4 161–0066–12 1 CA ASSY,PWR:3,18 AWG,250V/10A,98
–5 161–0154–00 1 CA ASSY,PWR:3,1.0MM SQ,250V/10A,2.5
Tektronix
part number
Serial no.
effective
Serial no.
discont’d
INCH,STR,IEC320,RCPT X NEMA 6–15P,US
METER,STR,IEC320,RCPT,SWISS
Mfr. part numberMfr. codeName & descriptionQty
S3109 ORDER BY
DESCRIPTION
5F520 86515030
Manufacturers cross index
Mfr.
code
05JW7 PURDY ELECTRONICS CORP INTEROPTIC DIVISION
060D9 UNITREK CORPORATION 3000 COLUMBIA HOUSE BLVD,
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 SUPPL Y CO 810 SE SHERMAN PORTLAND, OR 97214–4657
0LK97 JDS FITEL INC 570 WEST HUNT CLUB RD NEPEAN, ONTARIO CA ONT ARIO K2G 5W8
2W733 BELDEN WIRE & CABLE COMPANY 2200 US HWY 27 SOUTH
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
80126 PACIFIC ELECTRICORD CO 747 WEST REDONDO BEACH
93907 CAMCAR DIV OF TEXTRON INC ATTN: ALICIA SANFORD
S3109 FELLER U.S. CORPORATION 72 VERONICA AVE
TK2541 AMERICOR ELECTRONICS LTD UNIT–H
Manufacturer Address City, state, zip code
720 PALOMAR AVE
SUITE 120
PO BOX 1980
PO BOX 500
PO BOX 10
516 18TH AVE
UNIT #4
2682 W COYLE AVE
SUNNYVALE, CA 94086
VANCOUVER, W A 98661
RICHMOND, IN 47374
BEAVERT ON, OR 97077–0001
GARDENA, CA 90247–4203
ROCKFORD, IL 611045181
SOMERSET, NJ 08873
ELK GROVE VILLAGE, IL 60007
24
SD-43 Instruction Manual
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