Download Print this page
HP 83437A User Manual
HP 83437A User Manual

HP 83437A User Manual

Broadband light source

Advertisement

Quick Links

A l l t e s t I n s t r u me n t s , I n c .
5 0 0 C e n t r a l A v e .
F a r mi n g d a l e , N J 0 7 7 2 7
P : ( 7 3 2 ) 9 1 9 - 3 3 3 9
F : ( 7 3 2 ) 9 1 9 - 3 3 3 2
a l l t e s t . n e t
s s a l e s @ a l l t e s t . n e t
T h e t e s t & me a s u r e me n t
e q u i p me n t y o u n e e d a t
t h e p r i c e y o u w a n t .
A l l t e s t c a r r i e s t h e w o r l d ' s l a r g e s t s e l e c t i o n o f
u s e d / r e f u r b i s h e d b e n c h t o p t e s t & me a s u r e me n t
e q u i p me n t a t 5 0 % t h e p r i c e o f n e w .
O O u r e q u i p me n t i s g u a r a n t e e d w o r k i n g , w a r r a n t i e d , a n d
a v a i l a b l e w i t h c e r t i f i e d c a l i b r a t i o n f r o m o u r i n - h o u s e s t a f f
o f t e c h n i c i a n s a n d e n g i n e e r s .
• 1 0 + f u l l t i me t e c h n i c i a n s w i t h o v e r 1 5 0 y e a r s o f
s p e c i a l i z a t i o n
• 9 0 d a y w a r r a n t y & 5 d a y r i g h t o f r e t u r n o n a l l
e q u i p me n t
• • 1 - 3 y e a r w a r r a n t i e s f o r n e w a n d
p r e mi u m- r e f u r b i s h e d e q u i p me n t
• E v e r y u n i t t e s t e d t o O E M s p e c i f i c a t i o n s
• S a t i s f a c t i o n g u a r a n t e e d
Y o u h a v e p l a n s , w e w i l l h e l p y o u a c h i e v e t h e m.
A n y p r o j e c t . A n y b u d g e t .
t
G e t a q u o t e t o d a y !
C C a l l ( 7 3 2 ) 9 1 9 - 3 3 3 9 o r e ma i l s a l e s @a l l t e s t . n e t .

Advertisement

loading
Need help?

Need help?

Do you have a question about the 83437A and is the answer not in the manual?

Questions and answers

Subscribe to Our Youtube Channel

Summary of Contents for HP 83437A

  • Page 1 T h e t e s t & me a s u r e me n t e q u i p me n t y o u n e e d a t t h e p r i c e y o u w a n t . A l l t e s t I n s t r u me n t s , I n c .
  • Page 2 User’s Guide HP 83437A Broadband Light Source...
  • Page 3 HP Part No. 83437-90001 Printed in USA July 1996 First Edition © Copyright Hewlett-Packard Company 1996 All Rights Reserved. Reproduction, adaptation, or translation without prior written permission is prohibited, except as allowed under copyright laws. Hewlett-Packard Company Lightwave Operations 1400 Fountaingrove Parkway...
  • Page 4: Safety Symbols

    Safety Symbols Safety Symbols The following safety symbols are used throughout this manual. Familiarize yourself with each of the symbols and its meaning before operating this instru- ment. C A U T I O N The caution sign denotes a hazard. It calls attention to a procedure which, if not correctly performed or adhered to, could result in damage to or destruction of the product.
  • Page 5: The Hp 83437A-At A Glance

    Several output wavelengths are available Although the standard HP 83437A’s output is 1500 nm, your instrument may include additional options which provide a maximum light spread of over 500 nm. Up to four internal EELED sources can be installed when selected from the following options: •...
  • Page 6 2-12. Laser classification The HP 83437A is classified as an IEC LED Class 1 product. The total power of light energy radiated out of the OPTICAL OUT connector is less than –5 dBm. Operator main- tenance or precautions are not necessary to maintain safety. No controls, adjustments,...
  • Page 7 The HP 83437A—At a Glance Rear view of instrument...
  • Page 8: General Safety Considerations

    General Safety Considerations General Safety Considerations This product has been designed and tested in accordance with IEC Publica- tion 1010, Safety Requirements for Electronic Measuring Apparatus, and has been supplied in a safe condition. The instruction documentation contains information and warnings which must be followed by the user to ensure safe operation and to maintain the product in a safe condition.
  • Page 9: Printing History

    Printing History Printing History HP Part Number Edition Date 83437-90001 First July 1996 Typographical Conventions The following conventions are used in this book. Formatting Information key type Keys or text located on the keyboard or instrument. softkey type Key names that are displayed on the instrument’s screen.
  • Page 10: Warranty

    Warranty Warranty This Hewlett-Packard instrument product is warranted against defects in material and workmanship for a period of one year from date of shipment. During the warranty period, Hewlett-Packard Company will, at its option, either repair or replace products which prove to be defective. For warranty service or repair, this product must be returned to a service facility designated by Hewlett-Packard.
  • Page 11 Warranty...
  • Page 12: Table Of Contents

    Step 1. Inspect the Shipment 1-4 Step 2. Check the Fuse 1-6 Step 3. Connect the Line-Power Cable 1-7 Step 4. Turn on the HP 83437A 1-9 Returning the Instrument for Service 1-10 2. Making Measurements Modulating the Output Light 2-4...
  • Page 13 Contents Contents-2...
  • Page 14: Getting Started

    Getting Started...
  • Page 15 Getting Started Getting Started Getting Started The instructions in this chapter show you how to install your HP 83437A. You should be able to finish these procedures in about ten to twenty minutes. After you’ve completed this chapter, continue with Chapter 2, “Making Mea-...
  • Page 16: What You'll Find In This Chapter

    Measurement accuracy—it’s up to you! Fiber-optic connectors are easily damaged when connected to dirty or damaged cables and accessories. The HP 83437A’s front-panel OPTICAL OUT connector is no exception. When you use improper cleaning and handling techniques, you risk expensive instru- ment repairs, damaged cables, and compromised measurements.
  • Page 17: Step 1. Inspect The Shipment

    If your shipment is damaged or incomplete, save the packing materials and notify both the shipping carrier and the nearest Hewlett-Packard sales and service office. HP will arrange for repair or replacement of damaged or incomplete shipments without waiting for a settlement from the transportation company.
  • Page 18 Getting Started Step 1. Inspect the Shipment Table 1-1. HP 83437A Options Option Description 1550 nm isolator (offered only with standard instrument or Option 022) 1200 nm EELED source installed 1310 nm EELED source installed 1430 nm EELED source installed...
  • Page 19: Step 2. Check The Fuse

    3. Use a small flat-blade screwdriver to open the pull-out fuse drawer. 4. Verify that the value of the line-voltage fuse in the pull-out drawer is correct. The recommended fuse is an IEC 127 5×20 mm, 6.3A, 250 V, HP part number 2110-0703.
  • Page 20: Step 3. Connect The Line-Power Cable

    Getting Started Step 3. Connect the Line-Power Cable Step 3. Connect the Line-Power Cable C A U T I O N Always use the three-prong AC power cord supplied with this instrument. Failure to ensure adequate earth grounding by not using this cord may cause instrument damage.
  • Page 21 3. Connect the other end of the line-power cord to the power receptacle. Various power cables are available to connect the HP 83437A to ac power out- lets unique to specific geographic areas. The cable appropriate for the area to which the HP 83437A is originally shipped is included with the unit.
  • Page 22: Step 4. Turn On The Hp 83437A

    EMC filters and before other parts of the instrument. 2. Use the front-panel ACTIVE key to turn the light output on and off. If the HP 83437A fails to turn on properly, consider the following possibilities: • Is the line fuse good? •...
  • Page 23: Returning The Instrument For Service

    “Hewlett-Packard Sales and Service Offices” on page 4-6. If the instrument is still under warranty or is covered by an HP maintenance contract, it will be repaired under the terms of the warranty or contract (the warranty is at the front of this manual). If the instrument is no longer under warranty or is not covered by an HP maintenance plan, Hewlett-Packard will notify you of the cost of the repair after examining the unit.
  • Page 24: Preparing The Instrument For Shipping

    Getting Started Returning the Instrument for Service Preparing the instrument for shipping 1. Write a complete description of the failure and attach it to the instrument. Include any specific performance details related to the problem. The following information should be returned with the instrument. •...
  • Page 25 Getting Started Returning the Instrument for Service corrugated cardboard carton of 159 kg (350 lb) test strength. • The carton must be large enough to allow approximately 7 cm (3 inches) on all sides of the instrument for packing material, and strong enough to accommodate the weight of the instrument.
  • Page 26: Making Measurements

    Making Measurements...
  • Page 27 Making Measurements In this chapter, you’ll find examples of making measurements using the HP 83437A. These examples use your HP 83437A in conjunction with an HP 71450/1/2B Optical Spectrum Analyzer. Because of the HP 83437A’s rela- tively high power density, the optical spectrum analyzer can sweep much faster than if a white light source or surface emitting LED were used.
  • Page 28 Making Measurements Making Measurements What you’ll find in this chapter Modulating the Output Light 2-4 Performing Stimulus-Response Measurements 2-5 To characterize a passive device 2-7 Ambient Light Suppression 2-9 To suppress ambient light 2-10 Cleaning Connections for Accurate Measurements 2-12 Cleaning Optical Connectors 2-13 Cleaning Electrical Connections 2-19...
  • Page 29: Modulating The Output Light

    TTL value turns the source off. The following schematic shows the input cir- cuitry for each MODULATION INPUT connector. If you want to turn a source off, simply connect a BNC short to the rear-panel modulation input. You can order a BNC short from HP using the following part number: 1250-0774.
  • Page 30: Performing Stimulus-Response Measurements

    This section shows you how to perform stimulus-response measurements. The more wavelength options your HP 83437A has installed, the wider the wave- length range that can be measured. The combination of using the HP 83437A for broadband stimulus and the optical spectrum analyzer for selective response provides the following benefits: •...
  • Page 31 Performing Stimulus-Response Measurements Characterizing an optical amplifier In addition to the measurement described in this section, the HP 83437A is an ideal broadband light source for measuring the noise-gain profile of optical amplifiers. This allows you to accurately predict the amplifier’s performance in a 4, 8, or 16 channel DWDM systems.
  • Page 32: To Characterize A Passive Device

    1. Turn on the optical spectrum analyzer and the HP 83437A, and allow them to warm up for 1 hour. 2. Use a fiber optic cable to connect the HP 83437A’s output to the input of the optical spectrum analyzer.
  • Page 33 10. Insert the device you are testing between the optical spectrum analyzer and the HP 83437A. 11. Press NORMAL ON/OFF to turn the marker on. Rotate the front-panel knob to read the values along the response.
  • Page 34: Ambient Light Suppression

    Ambient light can add significant errors to optical power measurements. This is especially true when you are using or characterizing open beam devices. The following example shows how the combination of the HP 83437A and an HP 71450/1/2B Optical Spectrum Analyzer can be used to eliminate this error.
  • Page 35: To Suppress Ambient Light

    This example uses specific equipment and settings to demonstrate how to make accurate measurements in the presence of ambient light. As shown in the equipment setup drawing, two HP 83437As are used. One HP 83437A rep- resents the broadband contribution of ambient light. Because a 12 dB coupler is used, the ambient light contributes approximately 10 dB more power to the optical spectrum analyzer than the desired source.
  • Page 36 Making Measurements Ambient Light Suppression 3. On the optical spectrum analyzer, press INSTR PRESET. 4. Use the START and STOP keys to set the wavelength range from 1500 nm to 1600 nm. 5. Press REF LEVEL, and set the reference level to –30 dBm. 6.
  • Page 37: Cleaning Connections For Accurate Measurements

    Making Measurements Cleaning Connections for Accurate Measurements Cleaning Connections for Accurate Measurements Advances in measurement capabilities make connectors and connection tech- niques more important than ever. Damage to the connectors on calibration and verification devices, test ports, cables, and other devices can increase downtime and expense.
  • Page 38: Cleaning Optical Connectors

    Use dry connections. Dry connectors are easier to clean and to keep clean. Dry connections can be used with physically contacting connectors (for exam- ple, Diamond HMS-10/HP, FC/PC, DIN, and ST). If a dry connection has 40 dB return loss or better, making a wet connection will probably not improve, and can actually degrade, performance.
  • Page 39 Making Measurements Cleaning Connections for Accurate Measurements Table 2-1. Cleaning Accessories Item HP Part Number Isopropyl alcohol 8500-5344 Cotton swabs 8520-0023 Small foam swabs 9300-1223 Compressed dust remover (non-residue) 8500-5262 Table 2-2. Dust Caps Provided with Lightwave Instruments Item HP Part Number...
  • Page 40 Making Measurements Cleaning Connections for Accurate Measurements Visual inspection of fiber ends Although it is not necessary, visual inspection of fiber ends can be helpful. Contamina- tion or imperfections on the cable end face can be detected as well as cracks or chips in the fiber itself.
  • Page 41 Making Measurements Cleaning Connections for Accurate Measurements To clean a non-lensed connector C A U T I O N Do not use any type of foam swab to clean optical fiber ends. Foam swabs can leave filmy deposits on fiber ends that can degrade performance. 1.
  • Page 42 Making Measurements Cleaning Connections for Accurate Measurements To clean an adapter 1. Apply isopropyl alcohol to a clean foam swab. Cotton swabs can be used as long as no cotton fibers remain after cleaning. The foam swabs listed in this section’s introduction are small enough to fit into adapters.
  • Page 43 • HP 8702 analyzer with the appropriate source, receiver, and lightwave cou- pler • HP 8504 precision reflectometer • HP 8153 lightwave multimeter with a source and power sensor module in conjunction with a lightwave coupler • HP 81554SM dual source and HP 81534A return loss module...
  • Page 44: Cleaning Electrical Connections

    Cleaning Electrical Connections The following list includes the basic principles of microwave connector care. For more information on microwave connectors and connector care, consult the Hewlett-Packard Microwave Connector Care Manual, HP part number 08510-90064. Handling and Storage • Keep connectors clean •...
  • Page 45 Making Measurements Cleaning Connections for Accurate Measurements 2-20...
  • Page 46: Specifications And Regulatory Information

    Specifications and Regulatory Information...
  • Page 47: What You'll Find In This Chapter

    Specifications and Regulatory Information Specifications and Regulatory Information Specifications and Regulatory Information This chapter lists specification and characteristics of the instrument. The dis- tinction between these terms is described as follows: • Specifications describe warranted performance over the temperature range 0°C to +45°C and relative humidity <95% (unless otherwise noted).
  • Page 48: Specifications

    Specifications and Regulatory Information Specifications Specifications General Amplitude Specifications 1200 nm 1310 nm 1430 nm 1550 nm 1650 nm Source Source Source Source Source ± ± ± ± ± Peak wavelength 1200 nm 30 nm 1310 nm 20 nm 1430 nm 30 nm 1550 nm 20 nm...
  • Page 49: Specifications And Regulatory Information Specifications

    Specifications and Regulatory Information Specifications Table 3-1. Total Power (1 of 2) Installed Options Minimum Output Power (dBm) 1200 nm 1300 nm 1430 nm 1550 nm 1650 nm Source Source Source Source Source –13.0 • –17.0 –21.0 • • –17.0 •...
  • Page 50: General Specifications

    Specifications and Regulatory Information Specifications Table 3-1. Total Power (2 of 2) Installed Options Minimum Output Power (dBm) 1200 nm 1300 nm 1430 nm 1550 nm 1650 nm Source Source Source Source Source • • • –21.0 –17.0 • • •...
  • Page 51 Specifications and Regulatory Information Specifications Characteristic spectrum for standard 1550 nm configuration Characteristic spectrum with two EELEDs installed (Option 003)
  • Page 52 Specifications and Regulatory Information Specifications Characteristic spectrum with three EELEDs (Options 003 and 004) Characteristic spectrum with four EELEDs (Options 003, 004, and 006)
  • Page 53: Operating Specifications

    Specifications and Regulatory Information Specifications Operating Specifications Indoor Power: 115 VAC: 50 WATTS MAX. 230 VAC: 50 WATTS MAX. Voltage nominal: 115 VAC / 230 VAC range 115 VAC: 90-132 V range 230 VAC: 198-254 V Frequency nominals: 50 Hz / 60 Hz range: 47-63 Hz Altitude Up to 15,000 feet (4,572 meters)
  • Page 54: Regulatory Information

    Specifications and Regulatory Information Regulatory Information Regulatory Information • Laser Classification: This product contains an IEC LED Class 1. • This product complies with 21 CFR 1040.10 and 1040.11. • This product is designed for use in INSTALLATION CATEGORY II and POLLUTION DEGREE 2, per IEC 1010 and 664 respectively.
  • Page 55 Specifications and Regulatory Information Regulatory Information I’ll 3-10...
  • Page 56: Reference

    Reference...
  • Page 57 Reference Reference Reference What you’ll find in this chapter Instrument Options 4-3 Accessories 4-3 Front-Panel Fiber-Optic Adapters 4-4 AC Line-Power Cords 4-5 Hewlett-Packard Sales and Service Offices 4-6...
  • Page 58: Instrument Options

    FC/PC and Diamond HMS-10. Accessories • BNC 50Ω short (m) for rear-panel MODULATION INPUT connectors. Disables selected source. HP part number 1250-0774. • HP 81113PC DIN 4108 (angled) to Super-PC (straight) patchcord for use with Option 022 and Option 013 instruments.
  • Page 59: Front-Panel Fiber-Optic Adapters

    Reference Front-Panel Fiber-Optic Adapters Front-Panel Fiber-Optic Adapters The FC/PC adapter is the standard adapter supplied with the instrument. Options 011, 013, 014, and 017 replace the standard interface.
  • Page 60: Ac Line-Power Cords

    Reference AC Line-Power Cords AC Line-Power Cords...
  • Page 61: Hewlett-Packard Sales And Service Offices

    Reference Hewlett-Packard Sales and Service Offices Hewlett-Packard Sales and Service Offices Hewlett-Packard Sales and Service Offices (1 of 2) U.S. FIELD OPERATIONS Headquarters California, Northern California, Southern Hewlett-Packard Company Hewlett-Packard Company Hewlett-Packard Company 19320 Pruneridge Avenue 301 East Evelyn 1421 South Manhatten Ave. Cupertino, CA 95014 U.S.A.
  • Page 62 Reference Hewlett-Packard Sales and Service Offices Hewlett-Packard Sales and Service Offices (2 of 2) INTERCON FIELD OPERATIONS Headquarters Australia Canada Hewlett-Packard Company Hewlett-Packard Australia Ltd. Hewlett-Packard Ltd. 3495 Deer Creek Rd. 31-41 Joseph Street 17500 South Service Road Palo Alto, California 94304-1316 Blackburn, Victoria 3130 Trans-Canada Highway (415) 857-5027...
  • Page 63 Reference Hewlett-Packard Sales and Service Offices...
  • Page 64: Servicing

    Servicing...
  • Page 65 Safety first! Before servicing the HP 83437A, familiarize yourself with the safety markings on the instrument and the safety instructions in this manual. This instrument has been manufactured and tested according to international safety stan- dards.
  • Page 66 Servicing Servicing W A R N I N G For continued protection against fire hazard, replace line fuse only with same type and ratings, (type T 6.3A/250V for 100/240V operation). The use of other fuses or materials is prohibited. What you’ll find in this chapter General Information 5-4 Electrostatic Discharge Information 5-10 Troubleshooting 5-12...
  • Page 67: General Information

    Servicing General Information General Information Whenever you contact Hewlett-Packard about your HP 83437A, have the com- plete serial number and option designation available. This will ensure you obtain accurate service information. • Refer to Table 5-1 on page 5-5 for a list of service tools.
  • Page 68 Servicing General Information Table 5-1. Service Tools Tool HP Part Number Small Pozidriv screwdriver 8710-0899 Wire cutter 8710-0012 Long-nose pliers 8710-1107 5.5 mm nut driver 8710-1220 7 mm nut driver 8710-1217 TORX T-10 driver 8710-1623 TORX T-15 driver 8710-1622 Table 5-2. Internal Labels This label identifies the A2A1 Fiber Track Assembly.
  • Page 69 Source Assembly (Not orderable, return A2 to HP) A2A1 Fiber Track Assembly (Not orderable, return A2 to HP) A2A2 LED Modulation Board Assembly (Not orderable, return A2 to HP) A2A3 EELED (Not orderable, return A2 to HP) A2A4 EELED (Not orderable, return A2 to HP)
  • Page 70 Servicing General Information...
  • Page 71 Servicing General Information Table 5-4. Cable Assemblies Reference Description Designator Input fiber optic cable (Part of A2 assembly) Line switch cable (includes FL1 and LINE switch), to A4J1 A3J7 to B1 (Part of B1) Power supply cable, A2A2J2 pin 5 to front-panel “LINE” LED indicator (green wire) Power supply cable, A2A2J1 to front-panel “ACTIVE”...
  • Page 72 Servicing General Information...
  • Page 73: Electrostatic Discharge Information

    Servicing Electrostatic Discharge Information Electrostatic Discharge Information Electrostatic discharge (ESD) can damage or destroy electronic components. All work on electronic assemblies should be performed at a static-safe work station. The following figure shows an example of a static-safe work station using two types of ESD protection: •...
  • Page 74 W A R N I N G These techniques for a static-safe work station should not be used when working on circuitry with a voltage potential greater than 500 volts. Table 5-5. Static-Safe Accessories HP Part Description Number × ×...
  • Page 75: Troubleshooting

    Servicing Troubleshooting Troubleshooting W A R N I N G The opening of covers or removal of parts is likely to expose dangerous voltages. Disconnect the instrument from all voltage sources while it is being opened. W A R N I N G The power cord is connected to internal capacitors that may remain live for five seconds after disconnecting the plug from its power supply.
  • Page 76: If The Output Power Is Low

    Servicing Troubleshooting If the output power is low 1. Check for the following common problems: Check that the front-panel ACTIVE key is on. If the ACTIVE or LINE LEDs do not light, refer to “To check the power supply” on page 5-16.
  • Page 77: To Check An Led Driver Board Assembly

    Servicing Troubleshooting To check an LED Driver Board Assembly All of the A5 through A8 LED Driver Board Assemblies are identical. 1. Remove the power supply cable from J2 on the LED Driver Board Assembly. The end of this cable can be probed to measure all of the dc voltages supplied in the assembly.
  • Page 78: To Check The A2A2 Led Modulation Board Assembly

    5. Press the front-panel ACTIVE key so that the front-panel ACTIVE light is turned off. The voltage measured at the 2W resistor should now be approximately +0.7V. The EELED is turned off. 6. If the voltage measured across the resistor is incorrect, return the instrument to HP for servicing. 5-15...
  • Page 79: To Check The Power Supply

    Servicing Troubleshooting To check the power supply 1. Check the 6.3A fuse in the rear-panel’s line module FL1. Refer to “To check the line-power fuse” on page 5-17. 2. Remove the power supply cable from J2 on one of the A5 through A8 LED Driver Board Assemblies.
  • Page 80: To Check The Line-Power Fuse

    3. Use a small flat-blade screwdriver to open the pull-out fuse drawer. The recommended fuse is an IEC 127 5×20 mm, 6.3A, 250 V, HP part num- ber 2110-0703. Notice that an extra fuse is provided in a drawer located on the fuse holder.
  • Page 81: Performance Tests

    All of the tests are done manually without the aid of a computer. None of these tests require access to the interior of the instrument. Allow the HP 83437A to warm up for 15 minutes before doing any of the performance tests.
  • Page 82: Test 1. Total Output Power

    Total power is verified using the following devices: • Power meter The total power for each individual EELED installed in the HP 83437A is mea- sured. Because of internal couplers, the specified total power level depends on the number and wavelength of any installed EELED sources. Refer to Chapter 3, “Specifications and Regulatory Information”...
  • Page 83: Test 2. Peak Wavelength Accuracy

    Peak wavelength accuracy is verified using the following devices: • Optical spectrum analyzer Procedure 1. Connect an optical spectrum analyzer to the HP 83437A’s front-panel OPTICAL OUT connector. 2. Use the optical spectrum analyzer’s marker functions to measure the peak wavelength value of each EELED source installed in the HP 83437A.
  • Page 84: Test 3. Power Stability

    This test must be performed in a stable environment where the ambient tem- perature changes less than 1°C throughout the test. Procedure 1. Turn on the HP 83437A and the power meter. Allow them to warm up for one hour. 2. Connect a power meter to the HP 83437A’s front-panel OPTICAL OUT connector.
  • Page 85: Adjustment Procedures

    Super-PC patchcord. To adjust total power Description The total power for each individual EELED installed in the HP 83437A is adjusted by an associated potentiometer. Because of internal couplers, an EELED’s specified power depends on the number and wavelength of EELED sources installed.
  • Page 86 Servicing Adjustment Procedures 4. Use the following figure to locate the EELED for the unterminated MODULATION INPUT connector. The EELED is mounted to the left of identified jack. Table 5-6 can be used to confirm that the correct EELED has been located. 5-23...
  • Page 87 7. Adjust potentiometer R18 on the LED driver board assembly for the proper output power. Use Table 5-7 on page 5-26 to identify the correct power level for your instrument’s configuration. 8. If the HP 83437A has more than one source installed, repeat Step 3 through Step 7 to adjust another source.
  • Page 88 Servicing Adjustment Procedures 5-25...
  • Page 89 Servicing Adjustment Procedures Table 5-7. Adjustment Power Values (1 of 2) Installed Options Minimum Output Power (dBm) 1200 nm 1300 nm 1430 nm 1550 nm 1650 nm Source Source Source Source Source –13.0 • –17.0 –21.0 • • –17.0 • –17.0 –17.0 •...
  • Page 90 Servicing Adjustment Procedures Table 5-7. Adjustment Power Values (2 of 2) Installed Options Minimum Output Power (dBm) 1200 nm 1300 nm 1430 nm 1550 nm 1650 nm Source Source Source Source Source • • • –21.0 –17.0 • • • •...
  • Page 91: Replacing Instrument Assemblies

    Servicing Replacing Instrument Assemblies Replacing Instrument Assemblies This section provides step-by-step procedures to remove and replace the major instrument assemblies. These include the following procedures: To remove the instrument cover 5-29 To replace the A2 Source assembly 5-29 To route the rear-panel BNC modulation cables 5-30 To replace line filter assembly FL1 5-33 To replace a cable clip 5-34 5-28...
  • Page 92: Replacing Instrument Assemblies

    Servicing Replacing Instrument Assemblies To remove the instrument cover 1. Disconnect the power cord from the instrument. 2. Position the instrument so that you are looking at the rear panel. 3. Use a T-15 TORX driver to back out the screw that attaches the top cover to the instrument.
  • Page 93: To Route The Rear-Panel Bnc Modulation Cables

    To route the rear-panel BNC modulation cables The following figure shows the cable connections for each of the four possible rear-panel BNC connectors. (The standard HP 83437A has only one cable. Additional cables are supplied with options.) Each cable is connected to the indicated jack on the A2A2 assembly.
  • Page 94 Servicing Replacing Instrument Assemblies 5-31...
  • Page 95 Servicing Replacing Instrument Assemblies The figure below shows the correct path for the cables in the instrument. Be sure to route these cables as shown. 5-32...
  • Page 96: To Replace Line Filter Assembly Fl1

    Servicing Replacing Instrument Assemblies To replace line filter assembly FL1 Although replacing FL1 is straightforward, be sure to observe the following points: • Tighten the screws that attach FL1 to 6 in-lbs. Do not use the recommend- ed torque for M3 screws. Over tightening these screws will damage the line filter’s flange.
  • Page 97: To Replace A Cable Clip

    Servicing Replacing Instrument Assemblies To replace a cable clip Cable clips are used throughout the instrument to attach cables to sheet-metal housings. They attach with self-adhesive bonds. 1. Remove the old clip. 2. Remove any remaining glue. 3. Clean the surface using isopropyl alcohol. 4.
  • Page 98: Replaceable Parts

    To order a part that is not listed, include the following information with the order: • HP 83437A model number • Instrument serial number • Description of where the part is located, what it looks like, and its function (if known) •...
  • Page 99 • Direct ordering and shipment from Hewlett-Packard • No maximum or minimum on any mail order. (There is a minimum order amount for parts ordered through a local HP office when the orders require billing and invoicing.) • Prepaid transportation. (There is a small handling charge for each order.) •...
  • Page 100 Servicing Replaceable Parts 5-37...
  • Page 101 Source Assembly (Not orderable, return A2 to HP) A2A1 — Fiber Track Assembly (Not orderable, return A2 to HP) A2A2 — LED Modulation Board Assembly (Not orderable, return A2 to HP) A2A3 — EELED (Not orderable, return A2 to HP) A2A4 —...
  • Page 102 Servicing Replaceable Parts 5-39...
  • Page 103 Servicing Replaceable Parts Table 5-9. Cable Assemblies Reference HP Part Description Designator Number — Input fiber optic cable (Part of A2 assembly) 83437-60008 Line switch cable (includes FL1 and LINE switch), to A4J1 — A3J7 to B1 (Part of B1) 83437-60003 Power supply cable, A2A2J2 pin 5 to front-panel “LINE”...
  • Page 104 Servicing Replaceable Parts 5-41...
  • Page 105 Servicing Replaceable Parts Table 5-10. Front-Panel Parts HP Part Item Description Number 83437-00002 Front panel, dress 5021-8413 Front frame 83437-00001 Front subpanel 54714-41903 ACTIVE key 1990-1213 LED lamp IF=15 mA maximum 85680-40004 LED mount 83437-20004 LED spacer 83410-20003 Adapter 0515-0430 Screw with washer, TORX T10 Pan Head, M3 X 0.5, 6 mm long...
  • Page 106 Servicing Replaceable Parts 5-43...
  • Page 107 Servicing Replaceable Parts Table 5-11. Rear-Panel Parts HP Part Item Description Number 83437-00005 Rear panel, dress 5021-5814 Rear frame 2110-0703 Fuse, 6.3A 250V NTD FE IEC 0515-2032 Screw, TORX T10 Flat Head, M3 X 0.5, 8 mm long 0535-0033 Nut, hex M3.5 X 0.6 2190-0585 Washer, flat HLLC 3.6 mm inside diameter...
  • Page 108 Servicing Replaceable Parts 5-45...
  • Page 109 Servicing Replaceable Parts Table 5-12. Top and Bottom View Parts HP Part Item Description Number ° 0515-1400 Screw, TORX T10 90 Flat Head, M3.5 x 0.6, 8mm long 5041-8803 Trim strip, top (not shown) 1252-7513 Ribbon cable clip 83437-00004 A2MP2, Sheet-metal optical deck (part of A2 assembly)
  • Page 110 Servicing Replaceable Parts 5-47...
  • Page 111 Servicing Replaceable Parts Table 5-13. Side View Parts HP Part Item Description Number 5021-5831 Side frame 5001-0538 Trim strip, side (not shown) 0515-0458 Screw, TORX T10 Pan Head, M3.5 x 0.6, 8 mm long 0515-2086 Screw, TORX T15 Flat Head, M4 x 0.7, 7 mm long 0515-0377 Screw, TORX T10 Pan Head, M3.5 x 0.6, 10 mm long...
  • Page 112 Servicing Replaceable Parts Table 5-14. Instrument Cover Parts HP Part Item Description Number — 5062-3730 Cover, top — 5062-3742 Cover, bottom — 5062-3751 Cover, left side — 83437-00009 Cover, right side — 5041-8801 Molded feet 5-49...
  • Page 113 Servicing Replaceable Parts 5-50...
  • Page 114 1-6 adapters, 2-17 type, 1-6, 5-17 cabinet, 1-2 fiber-optic connections, 2-12, 2-16 non-lensed connectors, 2-16 compressed dust remover, 2-14 HP offices, 4-6 connector HP product notes, 2-6 care, 2-12 humidity, 3-2, 3-8 care manual, 2-19 connectors, characterizing, 2-18 Index-1...
  • Page 115 Index IEC Publication 1010, vii optical amplifiers, 2-6 index-matching compounds, 2-13 OPTICAL OUT connector, v, 1-3 input, connector, 2-12 optical spectrum analyzer, 2-5, 2-9 insertion loss, connectors, 2-18 options, instrument, 1-5, 4-3 inspecting ordering parts, 5-35 cables, 2-14 instrument, 1-4 visual, 2-15 packaging for shipment, 1-11 installing, 1-2...
  • Page 116 Index returning for service, 1-10 safety, v laser classification, 1-2 symbols, iii sales and service offices, 4-6 serial number instrument, 1-4 service, 1-10 returning for, 1-10 sales and service offices, 4-6 shipping damage, 1-4 procedure, 1-11 specifications, 3-2, 3-3 definition of terms, 3-2 general, 3-3, 3-5 operating, 3-3, 3-5, 3-8 stimulus-response measurements, 2-5, 2-7...
  • Page 117 Index Index-4...