Tektronix OA 5000 User Manual
User Manual
OA 5000 Series
Optical Attenuators
070-7612-06
www.tektronix.com
Copyright © Tektronix, Inc. All rights reserved.
Tektronix products are covered by U.S. and foreign patents, issued and pending. Information in this public ation supercedes
that in all previously published material. Specifications and price c hange privileges reserved.
Tektronix, Inc., P.O. Box 500, Beavert on, OR 97077
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, ei ther 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 peri od and make suitable arrangements for the performance of service. Customer shall be
responsible for packaging and shipping the defective product to the service cente r 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 , fa ilure 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 re presentative s to install, repair or service the product;
b) to repair damage resulting from improper use or connection to incompatible equipm ent; 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 difficul ty of servicing the product.
THIS WARRANTY IS GIVEN BY TEKTRONIX IN LIEU OF ANY OTHER W ARRANTIES, 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.
EC Declaration of Conformity
We
Tektronix UK Ltd.
The Arena
Downshire Way
Bracknell, RG12 1PU
declare under sole responsibility that the
OA5000 Series Optical Attenuators
OA5002, OA5012, OA5022, and OA5032
Including the OCP5502 Power Module
meet the intent of Directive 89/336/EEC for Electromagnetic Compatibility and
Low Voltage Directive 73/23/EEC for Product Safety.
Compliance was demonstrated to the following specifications as listed in the Official
Journal of the European Communities:
EMC Directive 89/336/EEC:
EN 61326 EMC requirements for Class A electrical equipment for
measurement, control, and laboratory use
IEC 61000--4--2 Electrostatic Discharge Immunity
(Performance Criterion B)
IEC 61000--4--2 RF Electromagnetic Field Immunity
(Performance Criterion A)
IEC 61000--4--2 Electrical Fast Transient / Burst Immunity
(Performance Criterion B)
IEC 61000--4--2 Power Line Surge Immunity
(Performance Criterion B)
IEC 61000--4--2 RF Conducted Immunity
(Performance Criterion A)
IEC 61000--4--2 Power Line Voltage Fluctuation Immunity
(Performance Criterion B)
EN 61000--3--2 AC Power Line Harmonic Emissions
This product meets the essential requirements in Annes 1 of the
Low Voltage Directive 73/23/EEC, amended by 93/68/EEC:
EN 61010--1/A1 Safety requirements for electrical equipment for
measurement, control, and laboratory use
Welcome
Congratulations on your purchase of an OA 5000 Series Optical Attenuator.
The OA 5000 Series Optical Attenuators are high-performance instruments
used to attenuate optical signals. The OA 5000 Series consists of four instruments, the OA 5002, OA 5012, OA 5022, and OA 5032. The major difference
between the models is the optical fiber connection. The OA 5002 is used
with single-mode fiber; the OA 5012, with 50 m multimode fiber; the
OA 5022, with 62.5 m multimode fiber; and the OA 5032, with 100 mfiber.
Some of the outstanding characteristics of the OA 5000 Series are:
H Attenuation to 60 dB — the OA 5000 can attenuate signals up to 60 dB
in steps of 0.01 dB. A shutter provides greater than 100 dB attenuation
for the OA 5002, OA 5012, and OA 5022. The shutter provides greater
than 90 dB attenuation for the OA 5032.
H 600 nm to 1700 nm calibrated spectral response in one unit.
H Linear response within ±0.05 dB.
H Ability to store attenuation levels, which is useful for repeat measure-
ments.
H GPIB Programmable — the OA 5000 Series conforms to IEEE Std 488.2.
H Models for both Single and Multimode Fiber.
OA 5000 Series User Manual i
Welcomeii
A Quick Tour
Contents
Welcome i...................................................
Contents iii...................................................
List of Figures vii..............................................
List of Tables viii...............................................
Safety ix......................................................
Installation 1-1.................................................
Removing the OA 5000 1-2..................................
A Quick Tour 1-3...............................................
Preset the OA 5000 1-3......................................
Storing and Recalling Settings 1-4...........................
Setting a Reference Value 1-5................................
User Reference
Operator Overview 2-1..........................................
The User Reference Section 2-1.............................
Enabling/Disabling Attenuation 2-3..............................
Setting Attenuation Levels 2-5...................................
Specifying the Wavelength 2-5...............................
Setting the Attenuation Level 2-6.............................
Setting the Attenuation Level to Minimum 2-7.................
Setting the GPIB Address 2-9...................................
Setting the Reference Level 2-11.................................
Measuring Insertion Loss 2-12................................
Approximating Signal Power 2-13.............................
Storing and Recalling
Attenuation Levels 2-15......................................
OA 5000 Series User Manual iii
Programming
Setting Up the Instrument 3-1...................................
Controllers 3-1.............................................
Using the GPIB Interface 3-1.................................
Command Syntax 3-5...........................................
Clearing the OA 5000 3-5....................................
Command and Query Structure 3-6..........................
Command Entry 3-8.........................................
Argument Types 3-10.........................................
Syntax Diagrams 3-11........................................
Commands 3-13.................................................
Common Commands and Queries 3-13........................
Device Commands and Queries 3-14..........................
ADJusting? (Query Only) 3-15................................
ALLev? (Query Only ) 3-15....................................
ATTenuation 3-16............................................
BLRN 3-17...................................................
*CAL? (Query Only) 3-18.....................................
*CLS (No Query Form) 3-18..................................
DESE 3-19...................................................
DISable 3-20................................................
DISPlay 3-20................................................
*ESE 3-21...................................................
*ESR? (Query Only) 3-22.....................................
EVEnt? (Query Only) 3-22....................................
EVMSG? (Query Only) 3-23...................................
EVQty? (Query Only) 3-23....................................
FACTORY (No Query Form) 3-24..............................
HEADer 3-25................................................
*IDN? (Query Only) 3-26.....................................
*LRN? or SET? 3-26..........................................
*OPC 3-27...................................................
*PSC 3-27...................................................
RECall (No Query Form) 3-28.................................
REFerence 3-29..............................................
*RST (No Query Form) 3-29..................................
*SRE 3-30...................................................
*STB? (Query Only) 3-31.....................................
STORe (Store Attenuation) 3-31...............................
*TST? (Query Only) 3-32.....................................
VERBOSE 3-33..............................................
*WAI (No Query Form) 3-34...................................
WAVelength 3-34.............................................
Welcomeiv
Appendices
Status and Events 3-35..........................................
Registers 3-35...............................................
Queues 3-39.................................................
Event Handling Sequence 3-39................................
Conflicts 3-40................................................
Messages 3-41..............................................
Appendix A: Accessories A-1....................................
Standard Accessories A -1...................................
Optional Accessories A-1....................................
Appendix B: Specifications A-3..................................
Appendix C: Interface Specifications A-7.........................
Interface Messages A-7.....................................
Character Set (ASCII Chart) A-8..............................
GPIB Function Subsets A-9..................................
Appendix D: Using the *OPC Query/Command A-11................
Appendix E: Packing for Shipment A-13...........................
Appendix F: Maintenance A-15....................................
Cleaning the Optical Ports A-15...............................
Changing the Optical Port Connectors A-17....................
Appendix G: Product Verification A-21.............................
Equipment List A-21..........................................
Power Up A-22...............................................
Display Modes A-23..........................................
GPIB Address Setting A-24...................................
Attenuation Range A-24......................................
Shutter Attenuation and the DISABLE button A-25..............
1310 nm: Insertion Loss, Attenuation Accuracy, a nd
Repeatability A-26........................................
1550 nm: Insertion Loss, Attenuation Accuracy, a nd
Repeatability A-28........................................
850 nm (except A5002): Insertion Loss, Attenuation
Accuracy, and Repeatability A-29..........................
Appendix H: Replaceable Parts A-31..............................
Parts Ordering Information A-31...............................
Using the Replaceable Parts List A-31.........................
OA 5000 Series User Manual v
Index
Index I-1......................................................
Welcomevi
List of Figures
Figure 1-1: Installing the OA 5000 into the Power Module 1-2.........
Figure 1-2: OA 5002 Front Panel 1-4..............................
Figure 2-1: OA 5002 Front Panel 2-2..............................
Figure 2-2: The Location of the DISABLE Button 2-3................
Figure 2-3: Setting Attenuation Levels 2-5..........................
Figure 2-4: The Location of the ADDR (SET) Button 2-9..............
Figure 2-5: The Location of the SET REF Button 2-11.................
Figure 2-6: The Location of the STORE and RECALL Buttons 2-15.....
Figure 3-1: GPIB Connector Location 3-2..........................
Figure 3-2: Typical GPIB Network Configurations 3-2................
Figure 3-3: Command Message Elements 3-6......................
Figure 3-4: Block Argument Example 3-10..........................
Figure 3-5: Typical Syntax Diagrams 3-11...........................
Figure 3-6: The Standard Event Status Register (SESR) 3-35..........
Figure 3-7: The Status Byte Register (SBR) 3-36.....................
Figure 3-8: The Device Event Status Enable Register (DESER) 3-37....
Figure 3-9: The Event Status Enable Register (ESER) 3-38............
Figure 3-10: The Service Request Enable Register (SRER) 3-38.......
Figure 3-11: Status and Event Handling Process 3-40................
Figure A-1: Removing the Optical Bulkhead Connector A-16..........
Figure A-2: FC Optical Bulkhead Assembly A-17.....................
Figure A-3: ST Optical Bulkhead Assembly A-18.....................
Figure A-4: DIN 47256 Optical Bulkhead Assembly A-18..............
Figure A-5: SC Optical Bulkhead Assembly A-19.....................
Figure A-6: OA 5000 Replaceable Parts A-33........................
OA 5000 Series User Manual vii
List of Tables
Table 3-1: B NF Symbols and Meanings 3-5........................
Table 3-2: Command Message Elements 3-6......................
Table 3-3: Comparison of Header On and Off Responses 3-7.........
Table 3-4: Commands Common to All GPIB Devices and
Supported by the OA 5000 Series 3-13.........................
Table 3-5: OA 5000 Device Commands and Parameters 3-14.........
Table 3-6: FACTORY Front Panel Settings 3-24......................
Table 3-7: R esults from *TST? 3-32................................
Table 3-8: SESR Bit Functions 3-36................................
Table 3-9: SBR Bit Functions 3-37..................................
Table 3-10: No Event Messages 3-41...............................
Table 3-11: Command Error Messages — CME Bit 5 3-41............
Table 3-12: Execution Error Messages — EXE Bit 4 3-42.............
Table 3-13: Device Error Messages — DDE Bit 3 3-43................
Table 3-14: System Event Messages — QYE Bit 2 3-43...............
Table 3-15: Execution Warning Messages — EXE Bit 4 3-43..........
Table A-1: Optical Characteristics A-3.............................
Table A-2: Mechanical Characteristics A-4..........................
Table A-3: Environmental Performance A-4........................
Table A-4: OA 5000 Standard Interface Messages A-7..............
Table A-5: The ASCII Character Set A-8............................
Table 4-1: Equipment Required for Performance Verification A-21......
Table 4-2: Attenuation Accuracy at 1310 nm A-27....................
Table 4-3: Attenuation Accuracy at 1550 nm A-29....................
Table 4-4: Attenuation Accuracy at 850 nm A-30.....................
Welcomeviii
Safety
You might be eager to begin using your OA 5000, but please take a moment
to review these safety precautions. They are provided for your protection
and to prevent damage to the Optical Attenuator. This safety information
applies to all operators and service personnel.
Symbols and Terms
These two terms appear in manuals:
H
statements identify conditions or practices that could result in
damage to the equipment or other property.
H
statements identify conditions or practices that could result in
personal injury or loss of life.
These two terms appear on equipment:
H CAUTION indicates a personal injury hazard not immediately accessible
as one reads the marking, or a hazard to property including the equip-
ment itself.
H DANGER indicates a personal injury hazard immediately accessible as
one reads the marking.
This symbol appears in manuals:
Static-Sensitive Devices
These symbols appear on equipment:
DANGER
High Voltage
OA 5000 Series User Manual ix
Protective
ground (earth)
terminal
ATTENTION
Refer to
manual
Specific Precautions
Observe all of these precautions to ensure your personal safety and to
prevent damage to either the OA 5000 or equipment connected to it.
Optical Output
WARNING
T o prevent damage to your eyes, avoid looking into the optical
output port while there is an optical signal connected to the input
port. Even if the OA 5000 is switched off, light can pass through the
attenuator. Always attach the output port to a receiver before attaching the source signal to the input port.
Power Source
The OA 5000 is designed for operation in a Tektronix TM 5000 Series Power
Module or the right-hand slot of an Tektronix OCP 5502. To ensure safe
operation, follow all precautions listed in the instrument’s Operators Manual.
Do not attempt to operate the OA 5000 with any other power source.
Grounding the Optical Attenuator
The OA 5000 is grounded through the power module. To avoid electric
shock, plug the power module power cord into a properly wired receptacle
where earth ground has been verified by a qualified service person.
Without the protective ground connection, all parts of the OA 5000 are
potential shock hazards. This includes knobs and controls that may appear
to be insulators.
Use the Proper Power Cord
Use only the power cord and connector specified for your TM 5000 Series
Power Module. Use only a power cord that is in good condition.
Use the Proper Fuse
To avoid fire hazard, use only the fuse specified in the parts list for your
TM 5000 Series Power Module, and which is identical in type, voltage rating,
and current rating.
Do Not Remove Covers or Panels
To avoid personal injury, do not operate the OA 5000 or TM 5000 Series
Power Module without the panels or covers.
Safetyx
Do Not Operate in Explosive Atmospheres
The OA 5000 provides no explosion protection from static discharges or
arcing components. Do not operate the OA 5000 in an atmosphere of explosive gasses.
OA 5000 Series User Manual xi
Safetyxii
A Quick Tour
Installation
The OA 5000 Optical Attenuator is designed to operate in a Tektronix
TM 5000 Series Power Module or the right -hand slot of a Tektronix
OCP 5502. To ensure safe operation, follow all precautions listed in the
Power Module’s Operator Manual. Do not attempt to operate the OA 5000
with any other power source.
Install the OA 5000 as follows:
Step 1: Plug the TM 5000 Power Module or OCP 5502 into an appropri-
ate AC power source.
CAUTION
To prevent possible instrument damage, make sure the power
module is turned off before inserting the OA 5000.
Step 2: After ensuring the power module is turned off, align the top and
bottom grooves of the OA 5000 with the rails of the power module (in
the right-hand slot of the OCP 5502) and slide the OA 5000 in until the
edge connector snaps into place. See Figure 1-1. The OA 5000 front
panel should be flush with the power module cabinet.
OA 5000 Series User Manual 1 --- 1
Installation
Release Lever
OA 5000
TM 5000 Series
Power Module
Removing the OA 5000
Figure 1-1: Installing the OA 5000 into the Power Module
If you will be programming the OA 5000 over the GPIB, perform the following
additional step:
Step 3: Attach the GPIB cable from your instrument controller to the
GPIB connector located on the back of the TM 5000 Power Module.
Before removing the OA 5000 from the power module, turn the power module off.
To remove the OA 5000 plug-in, grab the release lever and pull the instrument out.
1 --- 2
A Quick Tour
A Quick Tour
This section provides a brief overview of the OA 5000 Optical Attenuator. The
overview illustrates how easy it is to learn about and use the OA 5000.
You can read this section or you can choose to investigate the OA 5000 on
your own. If you decide not to read the overview, refer to the User Reference
section to answer any questions you may have. User Reference also describes details and features not covered in this section.
In this section you will set up the OA 5000 and change various settings to
show get a feel for how the OA 5000 works. You will not be using any optical
signals.
Figure 1-2, on page 1 --- 4, presents a front panel view of the OA 5000.
Preset the OA 5000
If you have not already done so, install the OA 5000 as described on
page 1--- 1 and turn on the instrument.
Step 1: Press MODE so that the ATT indicator is lit and -- REF is not lit.
This sets the OA 5000 to display attenuation in absolute units rather than
displaying attenuation relative to a reference value.
Step 2: Press WAVELENGTH. The word SET will appear in the attenua-
tion display.
Step 3: Using the COARSE and FINE knobs, set the WAVELENGTH to
1300 nm.
The actual attenuation of an optical input signal varies depending on the
wavelength of the signal. To ensure accurate attenuation readings, set
WAVELENGTH to the wavelength of the signal you are attenuating.
Step 4: Press WAVELENGTH again to accept the new wavelength
value.
Step 5: Press DISABLE,sothatitisnotlit.
If the DISABLE button is lit, the shutter inside the OA 5000 blocks the
signal path, providing ≥100 dB attenuation for the OA 5002, OA 5012,
and OA 5022, and ≥90 dB attenuation for the OA 5032. When the
DISABLE button is not lit, the shutter is withdrawn from the optical
signal path, enabling you to set the attenuation value from 0 to 60 dB in
0.01 dB increments.
Step 6: Press MIN ATT.
This sets the OA 5000 to 0 dB attenuation.
OA 5000 Series User Manual 1 --- 3
A Quick Tour
DISABLE
MIN ATT
STORE 1 RECALL 1
STORE 2 RECALL 2
REMOTE MODE
Storing and Recalling Settings
ADDR
(SET)
SET REF
WAVE-
LENGTH
COARSE
FINE
Figure 1-2: OA 5002 Front Panel
Use the store and recall buttons to save one or two attenuator settings for
use at a later time.
Step 7: Using the COARSE knob, set the attenuation to 10.00 dB.
1 --- 4
Step 8: Store the attenuation setting by pressing STORE 1.
Step 9: Change the attenuation setting, using both the COARSE and
FINE knobs, to 21.50 dB.
Step 10: Store the attenuation setting by pressing STORE 2.
Step 11: Press MIN ATT and then press RECALL 1.
A Quick Tour
A Quick Tour
Check the ATTENUATION readout and verify that it is set to 10.00 dB.
Step 12: Press RECALL 2.
Check the ATTENUATION readout and verify that it is set to 21.50 dB.
Setting a Reference Value
The SET REF button allows you to set a reference value for the attenuation.
You can then measure attenuation relative to this set value.
Step 13: Press MIN ATT.
This sets the OA 5000 to 0 dB attenuation.
Step 14: Press the SET REF button.
The word SET will appear in the wavelength display. The reference value
can now be adjusted with the COARSE and FINE knobs.
Step 15: Adjust the reference value for --- 8.00 dB using the COARSE
and FINE knobs.
Step 16: Press the SET REF button to accept the displayed value. The
display will return to normal.
Step 17: Press the MODE button.
Notice that the -- REF indicator is lit, indicating that the attenuation
display is now displaying attenuation relative to a reference value. The
attenuation display shows 8.00 dB and the MIN ATT button is lit.
Step 18: Using the COARSE knob, adjust the attenuation to 10.00 dB.
Step 19: Press the MIN ATT button. Check that the attenuation readout
has changed to 8.00 dB and the MIN ATT button is lit.
OA 5000 Series User Manual
The attenuation display reads 8.00 dB, instead of 0.00 dB, because the
display is still in reference mode and the reference value is (--- 8.00).
Pressing MIN ATT will set the OA 5000 to 0.00 dB only if the display is
not in reference mode or the reference value is 0.00 dB.
Step 20: Recall the first stored setting by pressing RECALL 1.
Remember that you set STORE 1 to 10.00 dB. Note that the attenuation
readout is 18.00 dB. The display shows the value: 10.00 --- (--- 8.00)=
18.00 dB.
1 --- 5
A Quick Tour
Step 21: Recall the second stored setting by pressing RECALL 2.
Note that the attenuation readout is now 29.50 dB. Remember that you
set STORE 2 to 21.50 dB. The display shows the value: 21.50 ---
(--- 8.00)= 29.50 dB.
Step 22: Push the MODE button so that just the ATT indicator is lit, and
then push MIN ATT.
Notice that the ATTENUATION display is now 0.00, because you
pressed the MIN ATT button and the display is no longer in reference
mode.
Settings at Power Up
One last thing to note are the settings used at power up. When you power
down the OA 5000, it saves the attenuation setting, the mode, the wavelength, and reference levels. The next time you power up the OA 5000, it will
return to the settings stored when it was last powered down.
This completes the tour of the OA 5000.
1 --- 6
A Quick Tour
User Reference
Operator Overview
The User Reference Section
The User Reference section is arranged as an alphabetic list of topics. Each
topic covers one aspect of the operation of the OA 5000. Five topics follow
this operator overview:
H Enabling/Disabling Attenuation
H Setting Attenuation Levels
H Setting the GPIB Address
H Setting the Reference Level
H Storing and Recalling Attenuation Levels
Figure 2-1, on page 2 --- 2, details the controls located on the OA 5000 front
panel.
NOTE
If, after power-up, the decimal points in the WAVELENGTH display
are flashing, the unit has lost its calibrator values and needs to be
recalibrated. Contact your local service center.
OA 5000 Series User Manual 2 --- 1
Operator Overview
These lights indicate
whether the attenuation
display is in absolute
units or relative to a
reference value.
Pressing this button
generates a User
Request Event (URQ).
For more information,
see page 3 ---36. The
LED shows the
Remote/Local status. If
the LED is lit, the
OA 5000 is in remote
mode. If the LED is
flashing, the front
panel is locked out.
This button activates the
attenuation display
This light indicates that
the OA 5000 has
requested service from
the instrument
mode.
controller.
REMOTE MODE
SET REF
ADDR
(SET)
W A V E ---
LENGTH
STORE 1 RECALL 1
STORE 2 RECALL 2
COARSE
FINE
DISABLE
MIN ATT
When this indicator is lit, the
attenuation is being changed. When
it is dark, the set attenuation level
has been achieved.
The DISABLE button places
the shutter across the signal
path.
This button sets the
attenuation level to
minimum.
These buttons store
and recall attenuation
settings.
Use these knobs to
adjust the attenuation
level, the reference
level, the wavelength
setting, and the GPIB
address.
Use this button to assign the knobs
to set the GPIB address. The LED
is lit when the instrument is
addressed over the GPIB.
When this button is lit,
the knobs are
assigned to adjust the
Reference value.
When this button is lit, the
knobs are used to adjust the
wavelength setting.
Figure 2-1: OA 5002 Front Panel
2 --- 2
User Reference
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