Agilent 83438A - Manual

Contents Contents-1 The Agilent 83438A—At a Glance iii 1 Getting Started Step 1. Inspect the Shipment 1-4Step 2. Check the Fuse 1-5Step 3. Connect the Line-Power Cable 1-6Step 4. Turn on the Agilent 83438A 1-7Returning the Instrument for Service 1-8 2 Making Measurements Performing Stimulus-Response...

1 Step 1. Inspect the Shipment 1-4 Step 2. Check the Fuse 1-5 Step 3. Connect the Line-Power Cable 1-6 Step 4. Turn on the Agilent 83438A 1-7 Returning the Instrument for Service 1-8 Getting Started

1-2 Getting Started Getting Started Getting Started The instructions in this chapter show you how to install your Agilent 83438A. 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-surements”. Refer ...

1-4 Getting Started Step 1. Inspect the Shipment Step 1. Inspect the Shipment 1 Verify that all components ordered have arrived by comparing the shipping forms to the original purchase order. Inspect all shipping containers. If your shipment is damaged or incomplete, save the packing materials and n...

1-5 Getting Started Step 2. Check the Fuse Step 2. Check the Fuse 1 Locate the line-input connector on the instrument’s rear panel. 2 Disconnect the line-power cable if it is connected. 3 Use a small flat-blade screwdriver to open the pull-out fuse drawer. 4 Verify that the value of the line-voltage...

1-8 Getting Started Returning the Instrument for Service Returning the Instrument for Service The instructions in this section show you how to properly return the instru-ment for repair or calibration. Always call the Agilent Technologies Instrument Support Center first to initiate service before re...

2 Performing Stimulus-Response Measurements 2-3 To characterize a passive device 2-5 Ambient Light Suppression 2-7 To suppress ambient light 2-8 Modulating the Output Light 2-10 Cleaning Connections for Accurate Measurements 2-11 Making Measurements

2-3 Making Measurements Performing Stimulus-Response Measurements Performing Stimulus-Response Measurements This section shows you how to perform stimulus-response measurements. The combination of using the Agilent 83438A for broadband stimulus and the opti-cal spectrum analyzer for selective respon...

2-5 Making Measurements Performing Stimulus-Response Measurements To characterize a passive device 1 Turn on the optical spectrum analyzer and the Agilent 83438A, and allow them to warm up for 1 hour. 2 Use a fiber optic cable to connect the Agilent 83438A’s output to the input of the optical spectr...

2-7 Making Measurements Ambient Light Suppression 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 Agilent 83438A an...

2-8 Making Measurements Ambient Light Suppression 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 Agilent 83438As are used. One Agilent 83438A r...

2-10 Making Measurements Modulating the Output Light Modulating the Output Light The rear panel of the instrument is equipped with a MODULATION INPUT connec- tor. You can use this connector to digitally modulate the source for applica-tions using lock-in techniques. (Refer to “Ambient Light Suppress...

2-11 Making Measurements Cleaning Connections for Accurate Measurements Cleaning Connections for Accurate Measurements Today, advances in measurement capabilities make connectors and connec-tion techniques more important than ever. Damage to the connectors on cali-bration and verification devices, t...

2-14 Making Measurements Cleaning Connections for Accurate Measurements The soft core, while allowing precise centering, is also the chief liability of the connector. The soft material is easily damaged. Care must be taken to mini-mize excessive scratching and wear. While minor wear is not a problem...

2-18 Making Measurements Cleaning Connections for Accurate Measurements Visual inspection of fiber ends Visual inspection of fiber ends can be helpful. Contamination or imperfections on the cable end face can be detected as well as cracks or chips in the fiber itself. Use a microscope (100X to 200X ...

2-19 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 Apply pure isopropyl alcohol to a clea...

3-2 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 ...

3-3 Specifications and Regulatory Information Specifications Specifications General Specifications Total output power a +8.1 dBm maximum (6.5 mW)+5.5 dBm minimum (3.5 mW) +5.1 dBm maximum (3.2 mW) (Option 009)+2.5 dBm minimum (1.8 mW) (Option 009) Power stability b < ± 0.02 dB (15 minutes) < ±...

3-5 Specifications and Regulatory Information Specifications Characteristic output waveform when modulated with 270 Hz square wave Operating Specifications Use Indoor Power: 115 VAC: 50 WATTS MAX.230 VAC: 50 WATTS MAX. Voltage nominal: 115 VAC / 230 VACrange 115 VAC: 90-132 Vrange 230 VAC: 198-254 V...

3-6 Specifications and Regulatory Information Regulatory Information Regulatory Information • Laser Classification: This product contains an IEC LASER Class 1 . • This product complies with 21 CFR 1040.10 Class 1, IEC 825-1 Class 1. • This product is designed for use in INSTALLATION CATEGORY II and ...

3-7 Specifications and Regulatory Information Regulatory Information Declaration of Conformity I’ll

4 Instrument Options 4-2 Accessories 4-2 Front-Panel Fiber-Optic Adapters 4-3 Power Cords 4-4 Agilent Technologies Service Offices 4-5 Reference

4-2 Reference Instrument Options Instrument Options Accessories • BNC short (m) for rear-panel MODULATION INPUT connectors. Disables selected source. Agilent Technologies part number 1250-0774 . • Agilent 81113PC DIN 4108 (angled) to Super-PC (straight) patchcord for use with Option 022 and Option 0...

4-4 Reference Power Cords Power Cords Plug Type Cable Part No. Plug Description Length (in/cm) Color Country 250V 8120-13518120-1703 Straight *BS1363A90° 90/22890/228 GrayMint Gray United Kingdom, Cyprus, Nigeria, Zimba-bwe, Singapore 250V 8120-1369 8120-0696 Straight *NZSS198/ASC90° 79/200 87/221 G...

4-5 Reference Agilent Technologies Service Offices Agilent Technologies Service Offices Before returning an instrument for service, call the Agilent Technologies Instrument Support Center at (800) 403-0801, visit the Test and Measurement Web Sites by Country page at http://www.tm.agilent.com/tmo/cou...

5 General Information 5-4 Electrostatic Discharge Information 5-10 Troubleshooting 5-12 If the output power is low 5-14 To check the A5 Laser Driver Board Assembly 5-15 To check the A2A2 Laser Modulation Board Assembly 5-17 To check the A4 Power Supply Board Assembly 5-18 To check the line-power fus...

5-4 Servicing General Information General Information Whenever you contact Agilent Technologies about your Agilent 83438A, have the complete 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 intern...

5-6 Servicing General Information Table 5-2. Service Tools Tool Agilent 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 5-3. Major Assem...

5-10 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-saf...

5-12 Servicing Troubleshooting Troubleshooting The following procedures are located in this section: If the output power is low 5-14 To check the A5 Laser Driver Board Assembly 5-15 To check the A2A2 Laser Modulation Board Assembly 5-17 To check the A4 Power Supply Board Assembly 5-18 To check the l...

5-14 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 A4 Power Supply Board Assembly” on page 5-18. ❒ Clean the OPTICAL OUT connector as descr...

5-15 Servicing Troubleshooting To check the A5 Laser Driver Board Assembly If the A5 Laser Driver Board Assembly needs to be replaced, perform the instructions in “To replace the A5 Laser Driver Board Assembly” on page 5-30. New A5 assemblies are shipped with three resistors unloaded. You must match...

5-17 Servicing Troubleshooting To check the A2A2 Laser Modulation Board Assembly 1 Check the +5V supply by probing the center pin of J11. The modulation input cable from the rear panel connects to this jack. 2 Check the –15V supply by probing any of the three resistors that are located next to J2. T...

5-18 Servicing Troubleshooting To check the A4 Power Supply Board Assembly 1 Check the 6.3A fuse in the rear-panel’s line module FL1. Refer to “To check the line-power fuse” on page 5-19. 2 Remove the power supply cable from J2 on the A5 Laser Driver Board Assembly. The end of this cable can be prob...

5-19 Servicing Troubleshooting To check the line-power fuse 1 Locate the line-input connector on the instrument’s rear panel. 2 Disconnect the line-power cable if it is connected. 3 Use a small flat-blade screwdriver to open the pull-out fuse drawer. The recommended fuse is an IEC 127 5 × 20 mm, 6.3...

5-20 Servicing Performance Tests Performance Tests The procedures in this section test the Agilent 83438A’s performance using the specifications listed in Chapter 3, “Specifications and Regulatory Informa-tion” as the performance standard. All of the tests are done manually without the aid of a comp...

5-21 Servicing Performance Tests Test 1. Total Output Power Description Total power is verified using the following devices: • Power meter Procedure 1 Connect a power meter to the Agilent 83438A’s front-panel OPTICAL OUT connector. 2 Measure the total power.

5-22 Servicing Performance Tests Test 2. Power Stability Description Power stability is verified using a power meter (> 30 dB return loss) 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 Agilen...

5-23 Servicing Adjustment Procedure Adjustment Procedure The Agilent 83438A has only one adjustment procedure, total power. Periodic adjustment is not required to maintain safety. C A U T I O N Option 022 instruments have an angled-fiber output. Be sure to use an angled-fiber patchcord during testin...

5-24 Servicing Adjustment Procedure To adjust total power Description The total power is adjusted by a potentiometer. The potentiometer is located on the A5 Laser Driver Board Assembly. Procedure 1 Remove the instrument’s top and bottom covers. 2 Connect a power meter to the Agilent 83438A’s front-p...

5-26 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 5-27 To replace the A2 Source assembly 5-28 To re...

5-27 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. Note that ...

5-28 Servicing Replacing Instrument Assemblies To replace the A2 Source assembly The A2 assembly, which includes A2A1, A2A2, A2A3, A2MP1, and A2MP2, must be replaced as a complete unit. Individual components cannot be repaired. W A R N I N G To avoid exposure to the laser path of a CLASS IIIb LASER ...

5-30 Servicing Replacing Instrument Assemblies To replace the A5 Laser Driver Board Assembly Three resistors on the A5 Laser Driver Board Assembly limit the maximum current to the A2A3 Pump Laser. These resistors are matched to the particu-lar pump laser installed in your instrument. New A5 assembli...

5-32 Servicing Replacing Instrument Assemblies To route the rear-panel BNC modulation cable The figure below shows the correct path for the rear-panel BNC cable. Be sure to route this cable as shown.

5-33 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 recommended torque for M3 screws. Over tightening these screws will ...

5-34 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 Rem...

5-35 Servicing Replaceable Parts 5Servicing Replaceable Parts In this section, you’ll find figures that identify each mechanical and electrical assembly in the instrument. An Agilent Technologies part number is provided for each available part. The following identification figures are provided: Tabl...

Index Index-1 A ac power cables, 1-6 , 4-4 accessories, 4-2 accuracy measurement, iv wavelength, 2-3 ACTIVE key, 1-7 adapters fiber optic, 4-3 Agilent offices, 4-5 ambient light, 2-7 angled output fiber, 1-4 , 4-2 assemblies, instrument, 5-6 , 5-37 B block diagram, iii BNC short, 2-10 broadband stim...