Instruction Manual
SD-44
Optical-to-Electrical Converter
071-0061-01
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.
Service Assurance
If you have not already purchased Service Assurance for this product, you may do so at any time during the
product’s warranty period. Service Assurance provides Repair Protection and Calibration Services to meet your
needs.
Repair Protection extends priority repair services beyond the product’s warranty period; you may purchase up to
three years of Repair Protection.
Calibration Services provide annual calibration of your product, standards compliance and required audit
documentation, recall assurance, and reminder notification of scheduled calibration. Coverage begins upon
registration; you may purchase up to five years of Calibration Services.
Service Assurance Advantages
H Priced well below the cost of a single repair or calibration
H Avoid delays for service by eliminating the need for separate purchase authorizations from your company
H Eliminates unexpected service expenses
For Information and Ordering
For more information or to order Service Assurance, contact your T ektronix representative and provide the
information below. Service Assurance may not be available in locations outside the United States of America.
Name VISA or Master Card number and expiration
Company date or purchase order number
Address Repair Protection (1,2, or 3 years)
City , State, Postal code Calibration Services (1,2,3,4, or 5 years)
Country Instrument model and serial number
Phone Instrument purchase date
Table of Contents
General Safety Summary ii. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Contacting Tektronix iv. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Getting Started 1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Standard Accessories 2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Options 2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Optional Accessories 2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Installation 3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Operating Basics 7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Handling 7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Cleaning Optical Connectors 7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Connecting Optical Signals 8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Attenuating Optical Signals 9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Specifications 10. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Performance Verification 12. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Equipment Required 12. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Output Zero 13. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
DC Conversion Gain 13. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Noise Equivalent Power 15. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Bandwidth/Frequency Response 15. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Replaceable Parts 18. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
SD-44 Instruction Manual
i
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.
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.
ii
SD-44 Instruction Manual
General Safety Summary
Symbols on the Product. The following symbols appear on the product:
CAUTION
Static Sensitive
CAUTION
Refer to Manual
SD-44 Instruction Manual
iii
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
iv
SD-44 Instruction Manual
Getting Started
The SD-44 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 converter accepts optical signals from DC up to
15 GHz. The SD-44 O/E converter installs in any of the front panel compartments of a Tektronix 11800 Series Digital Sampling Oscilloscope, the SM-11
Multichannel Unit, or the Tektronix CSA 803 Communications Signal Analyzer.
An optional stand-alone power supply is also available for the SD-44 O/E
converter (see page 20).
Figure 1 shows the front panel of the SD-44 O/E converter.
Screw lock knob
Green LED (power)
Electrical signal
output connector
(SMA)
Optical signal
input connector
(FC/PC)
Figure 1: SD-44 front panel
The SD-44 O/E converter has an FC/PC receptacle for optical signal input and a
precision 3.5 mm connector for electrical signal output.
The following list highlights the key performance characteristics of the SD-44
O/E converter:
H 1000 to 1650 nm wavelength response
H 15 GHz Minimum Transducer Bandwidth
H 35 mV/mW of DC conversion gain at 1310 and 1550 nm
For a complete list of specifications, see to page 10.
SD-44 Instruction Manual
1
Getting Started
Standard Accessories
The following accessories are standard with every SD-44 O/E converter:
H Hard case
H Instructions
H FC/PC to FC/PC 9 mm single-mode fiber jumper
H FC/ST, FC/SC, and FC/FC hybrid connectors
H Rigid cable (SMA-to-SMA, 50 W)
H SMA terminator
H Certificate of traceable calibration
For a list of replaceable part numbers, see page 18.
Options
Optional Accessories
The following options are available at the time of purchase:
H Opt 95 Calibration data
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 fibre optic hybrid connector
H 10 dB in-line single-mode optical attenuator
H Stand-alone power supply
For a list of part numbers, see page 18.
2
SD-44 Instruction Manual
Installation
Getting Started
Follow the instructions in this section to install the SD-44 O/E converter into the
Tektronix 11800 Series Digital Sampling Oscilloscope or CSA 803 Communications Signal Analyzer, or to connect it to the optional power supply for standalone operation.
11800 or CSA 803 Series
On the Tektronix 11800 Series Digital Sampling Oscilloscope or the CSA 803
Communications Signal Analyzer, the SD-44 O/E converter installs into any of
the front panel compartments.
NOTE. For the best performance, connect the SD-44 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.
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
Use the following procedure to install the O/E converter and sampling head
modules:
SD-44 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. Use the rigid connector if possible and install the shorter leg of the
connector on the sampling head. See Figure 2.
b. Align the SMA connectors carefully.
c. Use light, finger pressure to turn the nut. Do not turn the cable.
d. Tighten the 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).
Shorter leg
Sampling head
O/E converter
Figure 2: Using the rigid connector
4
SD-44 Instruction Manual
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 3.
SD-44 or
sampling head
SD-44 only
(power-only
compartments)
Figure 3: Front panel compartments in a CSA 803 Communications Signal Analyzer
SD-44 Instruction Manual
5
Getting Started
Optional Power Supply
The optional power supply kit (Figure 4) allows the user to power the SD-44
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 20.
Figure 4: Installation with optional power supply kit
6
SD-44 Instruction Manual
Operating Basics
Handling
To prolong the life of the SD-44 O/E converter observe the following handling,
cleaning, and operating instructions.
Handle the SD-44 O/E converter carefully at all times.
CAUTION. To avoid damaging the SD-44 O/E converter, take the following
precautions:
Do not drop the O/E converter since damage and misalignment of the photodiode optical assembly can result. Store the O/E converter in a secure location
when not in use.
Replace the protective caps on the input and output connectors when the O/E
converter is not in use.
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.
SD-44 Instruction Manual
7
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 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-44 O/E converter can couple to optical fibers with a core
diameter of up to 9 mm. Alternate types can be coupled by use of an FC-FC
jumper and the FC-FC, FC-ST, FC-SC adapters. (Refer to Optional accessories
on page 20.)
CAUTION. To maintain the high performance (low return loss) of the optical
interface, connect an adapter and cable between the input of the 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 O/E converter
from wear.
8
SD-44 Instruction Manual
If you connect fiber cores larger than 9 mm, the 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
attenuate the optical signal.
CAUTION. To avoid damaging the optical input of the SD-44 O/E converter,
attenuate optical signals to less than 5 mW average power or 10 mW peak power
at the wavelength with highest relative responsivity.
For linearity and measurement accuracy, attenuate the peak-to-peak swing of
signal to within the specified performance of 200 mW
p-p
Operating Basics
.
SD-44 Instruction Manual
9
Specifications
This section contains the specifications for the SD-44 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 12.
T able 1: SD-44 Specifications
Specification Description
Effective wavelength range, typical 1000 nm to 1650 nm
n DC conversion gain
Relative responsivity, typical See Figure 5
Absolute maximum nondestructive optical
input
n Bandwidth
Input fiber diameter Accepts 9 mm singlemode diameter; Numerical Aperture (NA) ≤ 0.20
Internal fiber diameter core: 9 mm single-mode fiber
Fiber connector style female FC/PC
Optical return loss > 30 dB typical; > 28 dB minimum when external mating fiber is also PC style
≥ 35 mV / mW at 1310 nm ± 20 nm and 1550 nm ± 20 nm
5 mW average power; 10 mW peak power at wavelength with highest relative
responsivity
DC to 15 GHz (≥ – 6 dB electrical power into 50 W) for signals < 2 mW
cladding: 125 mm
p-p
n Noise equivalent power
Impulse response width ≤ 30 ps FWHM (Full Width Half Maximum)
Aberrations ≤ 10%
n Output zero
External termination impedance 50 W ± 2 W
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: –55_ C to +75_ C
Non-operating: 15,240 m (50,000 ft)
10
SD-44 Instruction Manual
1.10
1.00
0.90
0.80
0.70
0.60
Relative conversion gain
0.50
0.40
Specifications
0.30
1000 1200 1400 1600
Wavelength (nanometers)
Figure 5: SD-44 relative responsivity (normalized to 1310 nm)
SD-44 Instruction Manual
11
Performance Verification
Use the following procedures to verify the warranted specifications of the SD-44
Optical-to-Electrical Converter. Before beginning these procedures, see page 17
and photocopy the test record and use it to record the performance test results.
The recommended certification interval is one year.
These procedures test the following specifications:
H Noise equivalent power
H Output zero
H DC conversion gain
H Bandwidth/Frequency Response
Equipment Required
Table 2 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 2: Test equipment
Description Minimum requirements Example product
Optical power meter with
head and adapters
1310 nm cal source output > 200 W1,
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 > 2.5%, resolution >
5 pW, Max power > 1 mW, calibrated from 700 nm – 1600 nm
stability > 0.1 dB over 5 minutes,
modulated square wave @ 10 kHz
with off modulation at zero-light
level
stability > 0.1 dB over 5 minutes,
modulated square wave @ 10 kHz
with off modulation at zero-light
level
pulse width < 6 ps Clark MXR ErFt
HP 8153A with
HP 811532 head
Rifocs 665R–PO
Rifocs 666R–PO
HP 8484A
picosecond 1550 laser
12
SD-44 Instruction Manual
T able 2: Test equipment (cont.)
Description Example productMinimum requirements
Sampling oscilloscope with
sampling head
Performance Verification
11K (1180X, CSA80xX with
SD-32 sampling head)
Output Zero
PC with GPIB port and
printer
Adjustable single-mode
optical attenuator
Digital voltmeter 4 1/2 digit Keithley 2000 or
50 W termination ± 1% 01 1-0049-01
BNC-to-banana adapter BNC female to dual banana 103-0090-00
Optical cable FC-FC multimode, 9 mm, 2 meters 174-1910-00
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
printer output of sampled waveforms
4 decades, 9 mm core fiber, FCstyle connectors
T ektronix OA5002
T ektronix DMM916
The O/E converter under test and the test equipment and should be warmed up
for 20 minutes at an ambient temperature between 20 and 30_ C.
1. Attach the output of the SD-44 to the voltmeter inputs with a 50 W termina-
tion and BNC-to-banana adapter.
DC Conversion Gain
SD-44 Instruction Manual
2. Install the optical dust cover on the input of the SD-44.
3. Check that output voltage is ≤ ± 1 mV. Record the result on the test record.
NOTE. Make sure that the optical connector ends of both the fiber from the
optical attenuator output and the SD-44 under test input fiber are well cleaned
before performing this step. See to the cleaning instructions on page 7.
1. Connect the 1310 nm laser source to attenuator input.
13
Performance Verification
NOTE. The longer wavelengths of 1310 nm and especially 1550 nm in single
mode fiber are sensitive to loss in fiber due to bending of the fiber. The fiber
bend radius of the SD-44 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-44.
2. Connect the optical attenuator output to the optical power meter using single
mode optical cable with FC connectors. Use the appropriate optical power
meter sensing head with calibrated measurement for a wavelength span
including 1310 nm and 1550 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-44 input under test.
5. Attach voltmeter with 50 W termination to SD-44 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
1550 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-44 input!
9. Adjust the optical attenuator until the voltmeter reading is the same as in
step 6 above ± 1%.
10. Without moving the optical attenuator from the position in the previous step,
disconnect the output fiber of the optical attenuator from the inline adapter
with the SD-44 and insert the optical attenuator output into the optical power
meter.
14
SD-44 Instruction Manual
Noise Equivalent Power
Performance Verification
11. 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)
12. Record the 1550 nm conversion gain on the test record.
Power the SD-44 under test using an 11801 DSO.
1. Zero the RF power meter.
2. Connect the SD-44 output channel to the RF power meter.
3. With the dust cover on the input to the SD-44, the power meter should read
less than
[15 pW
+ 81 10
+ W
elec
(NOTE : VńW
4. Record the measured and calculated results on the test record.
Bandwidth/Frequency Response
1. Connect the output of the optical impulse generator to the SD-44 optical
input through the optical attenuator.
2. Connect the trigger output of the optical impulse generator to the trigger
input of the digital sampling oscilloscope with a 50 W, 5X electrical
attenuator in series with the trigger input.
ń HzǸ 18 GHzǸ (measured conversion gain in VńW
opt
50 W
–15
(measured conversion gain in VńW
+ VńmW
opt
1000)
opt
opt
2
)
opt
2
)]
SD-44 Instruction Manual
3. Connect the SD-44 output to the scope input using a relatively short 50 W
cable (i.e. < 1 meter).
15
Performance Verification
4. Set the optical impulse generator to the 1 MHz rate and low energy mode.
Adjust the optical attenuator so that the height of the impulse is about
200 mV
p-p
.
5. Set the digital sampling oscilloscope to 10 mV/div vertical scale, 100 ps/div
horizontal scale, 1024-point record length, and insure the entire impulse
waveform is within the display region. Shift the horizontal record so that the
start of the impulse is within the first two divisions of the horizontal scale on
the display.
6. Average the waveform a minimum of 256 times.
7. Store the averaged waveform.
8. Recall the stored waveform.
9. Using a controller attached to the scope via GPIB (i.e. a PC, MAC,
workstation, etc.) download the waveform.
10. Using the available controller software (i.e. 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.
11. Check that the frequency response from DC to 15 GHz is greater than or
equal to –6 dB where dB = 20log (V
log/Vdc
) or electrical power into 50 W.
16
SD-44 Instruction Manual
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 0.035 V/mW N/A
DC conversion gain at 1550 nm ± 20 nm 0.035 V/mW N/A
Noise equivalent power
Bandwidth DC to 15 GHz – 6 dB (attach plot) N/A
N/A _______W
(calculated)
elec
SD-44 Instruction Manual
17
Replaceable Parts
For information about replaceable parts, contact your Tektronix sales representative.
1
Figure 6: SD-44 replaceable parts
3
2
18
SD-44 Instruction Manual
1 2 3 4 5
Figure 7: Standard accessories
Replaceable Parts
Figure 8: Optional accessories
1
1
6
2
3
2
5
4
3
5
4
Figure 9: Optional power cords
SD-44 Instruction Manual
19
Replaceable Parts
Replaceable parts list
Fig. &
index
number
6–1 211–0001–00 1 SCREW,MACHINE:2–56 X 0.25,PNH,STL CD 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
7–1 131–6252–00 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
–4 174–1910–00 1 CA ASSY FBR OPT :SM 2ML FC/PC TO FC/PC 05JW7 SGMGM–AA0002
–5 174–3828–00 1 CA ASSY,RF:COAXIAL,RFS,50 OHM, SMA X SMA 060D9 174–3828–00
8–1 016–1609–00 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 TO FC
–5 174–3737–00 1 FIBER OPTIC:COUPLER, 1 X 2 SPLITTER,
–6 174–1497–00 1 CA ASSY,FBR OPT :SINGLE MODE,2M L
Tektronix
part number
071–0061–01 1 MANUAL,TECH:INSTRUCTION,SD44,DP 80009 071–0061–01
015–1014–00 1 PWR DIVIDER,RES:50 OHM,SMA 64537 D241S
174–1385–00 1 CA ASSY,FBR OPT:SGL MODE,2M L,FC/PC
174–1386–00 1 CA ASSY ,FBR OPT:SINGLE MODE,2M L,FC/PC–ST 80009 174–1386–00
174–1387–00 1 CA ASSY ,FBR OPT:SGL MODE,2M L,FC/PC–FC/PC 80009 174–1387–00
174–1388–00 1 CA ASSY,FBR OPT :SGL MODE,2M
174–2322–00 1 CABLE,FIBER OPT :JUMPER,2 METER,62.5
174–2323–00 1 CABLE,FIBER OPT :JUMPER,2 METER,62.5
174–2324–00 1 CABLE,FIBER OPT :JUMPER,2 METER,62.5
Serial no.
effective
Serial no.
discont’d
Qty Name & description Mfr. code Mfr. part number
Standard accessories
ADAPTER,W/ZIRCONIA CERAMIC SLEEVE
SLEEVE
W/ZIRCONIA CERAMIC SLEEVE
0C5R7 CO92290
0C5R7 C032980
0C5R7 C002453
Optional accessories
CORD
CONN.FA100–35–10–HP,CTS710
SQUARE MOUNT ADAPTER,
WA VELENGTH INDEPENDENT, 90/10 RATIO, ATT .
0.1 DB, REFLE
FC/PC TO DIAMOND 2.5
DIAMOND3.5
L,FC/PC–BICONIC
MICRON,FC/PC TO FC/PC
MICRON,FC/PC TO BICONIC
MICRON,FC/PC TO SMA 906
80009 016–1609–00
0LK97 FA100–35–10–HP
80009 020–2209–00
0C5R7 3–0102–10–B–UFC–0
1–UFC–01
80009 174–1497–00
80009 174–1385–00
80009 174–1388–00
62712 174–2322–00
62712 174–2322–00
62712 PC/SK–20–002A
20
SD-44 Instruction Manual
Replaceable parts list (cont.)
Fig. &
index
number
9–1 161–0066–09 1 CA ASSY,PWR:3,0.75MM SQ,250V/10A,99
–2 161–0066–10 1 CA ASSY ,PWR:3,1.0 MM SQ,250V/10A,2.5
–3 161–0066–11 1 CA ASSY,PWR:3,1.0MM SQ,250V/10A,2.5
–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
Optional Power Cords
INCH,STR,IEC320,RCPT,EUROPEAN,
METER,STR,IEC320,RCPT X 13A,FUSED UK
PLUG(13A FUSE),UNI
METER,STR,IEC320,RCPT,AUSTRALIA,SAFTEY
CONTROLLED,
INCH,STR,IEC320,RCPT X NEMA 6–15P,US,SAFTEY
CONTROLLED,
METER,STR,IEC320,RCPT,SWISS,SAFTEY
CONTROLLED,
Replaceable Parts
Mfr. part numberMfr. codeName & descriptionQty
2W733 ORDER BY
DESCRIPTION
TK2541 ORDER BY
DESCRIPTION
80126 ORDER BY
DESCRIPTION
S3109 ORDER BY
DESCRIPTION
5F520 86515030
Manufacturers cross index
Mfr.
code
05JW7 PURDY ELECTRONICS CORP INTEROPTIC DIVISION
060D9 UNITREK CORPORATION 3000 COLUMBIA HOUSE BLVD, SUITE 1
0C5R7 ALCOA FUJIKURA LTD 150 RIDGEVIEW CIRCLE DUNCAN, SC 29334
0GZV8 HUBER & SUHNER INC 19 THOMPSON DRIVE ESSEX JUNCTION, VT 05452–3408
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
5F520 PANEL COMPONENTS CORP PO BOX 115 OSKALOOSA, IA 52577–0115
62712 SEIKO INSTRUMENTS USA INC ELECTRONIC COMPONENTS DIV
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. CORPORA TION 72 VERONICA AVE
TK2541 AMERICOR ELECTRONICS LTD UNIT–H
Manufacturer Address City, state, zip code
720 PALOMAR AVE
20
PO BOX 1980
2990 W LOMITA BLVD
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
TORRANCE, CA 90505
BEAVERT ON, OR 97077–0001
GARDENA, CA 90247–4203
ROCKFORD, IL 611045181
SOMERSET, NJ 08873
ELK GROVE VILLAGE, IL 60007
SD-44 Instruction Manual
21
Replaceable Parts
22
SD-44 Instruction Manual
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