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Agilent Technologies 83430A User Manual

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  • Page 1 (217) 352-9330 | Click HERE Find the Keysight / Agilent 83430A at our website:...
  • Page 2 Agilent 83430A Lightwave Transmitter User’s Guide...
  • Page 3 Agency. country. The information contained in WARNING this document is subject to This text denotes the Agilent Technologies war- ISM1-A change without notice. Com- The warning sign denotes a instrument is an rants that its software and panies, names, and data used hazard.

  • Page 4: The Agilent 83430A-At A Glance

    The Agilent 83430A—At a Glance The Agilent 83430A—At a Glance The Agilent 83430A lightwave transmitter is a directly modulated DFB laser source for digital and analog testing up to 2.5 Gb/s. Designed for evaluating the performance of high-speed TDM (time division multiplexed) and WDM (wavelength division multiplexed) optical receivers and systems, it is SDH/SONET compliant.
  • Page 5 The Agilent 83430A—At a Glance Test Capabilities in Systems The Agilent 83430A can be used as a general optical source or combined with other instrumentation in systems to make a variety of measurements. • Optical parametric tests — optical receiver sensitivity, dispersion power penalty of single-mode fiber (with an Agilent 71603A error performance an- alyzer and Agilent 83446A lightwave clock/data receiver).
  • Page 6 The Agilent 83430A—At a Glance Laser classification The Agilent 83430A is classified as an IEC LASER Class 1. The total power of light energy radiated out of the OPTICAL OUT connector is no greater than +8.1 dBm (6.5 mW). Operator maintenance or precautions are not necessary to maintain safety. No operator accessible controls, adjustments, or performance of procedures result in haz- ardous radiation exposure.
  • Page 7 (in which all means for protection are intact) only. W A R N I N G To prevent electrical shock, disconnect the Agilent 83430A from mains before cleaning. Use a dry cloth or one slightly dampened with water to clean the external case parts. Do not attempt to clean internally.
  • Page 8 General Safety Considerations C A U T I O N Before switching on this instrument, make sure that the line voltage selector switch is set to the line voltage of the power supply and the correct fuse is installed. Assure the supply voltage is in the specified range. C A U T I O N This product is designed for use in Installation Category II and Pollution Degree 2 per IEC 1010 and 664 respectively.

  • Page 10: Table Of Contents

    Step 1. Inspect the Shipment 1-4 Step 2. Check the Fuse 1-6 Step 3. Connect the Line-Power Cable 1-8 Step 4. Turn on the Agilent 83430A 1-10 Returning the Instrument for Service 1-11 2 Making Measurements Using the Agilent 83430A 2-3...
  • Page 12 Step 1. Inspect the Shipment 1-4 Step 2. Check the Fuse 1-6 Step 3. Connect the Line-Power Cable 1-8 Step 4. Turn on the Agilent 83430A 1-10 Returning the Instrument for Service 1-11 Getting Started...

  • Page 13: Getting Started

    Getting Started Getting Started Getting Started The instructions in this chapter show you how to install your Agilent 83430A. 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 14 Measurement accuracy—it’s up to you! Fiber-optic connectors are easily damaged when connected to dirty or damaged cables and accessories. The Agilent 83430A’s front-panel OPTICAL OUT connector is no excep- tion. When you use improper cleaning and handling techniques, you risk expensive instrument repairs, damaged cables, and compromised measurements.

  • Page 15: Step 1. Inspect The Shipment

    Inspect all shipping containers. If your shipment is damaged or incomplete, save the packing materials and notify both the shipping carrier and the nearest Agilent Technologies service office. Agilent Technologies will arrange for repair or replacement of damaged or incomplete shipments without waiting for a settlement from the transportation company.
  • Page 16 Getting Started Step 1. Inspect the Shipment...

  • Page 17: Step 2. Check The Fuse

    Before connecting the lightwave receiver to the power source, you must set the rear-panel voltage selector correctly to adapt the lightwave receiver to the power source. An improper selector setting can damage the Agilent 83430A when it is turned on.
  • Page 18 Getting Started Step 2. Check the Fuse 6 Verify that the value of the line-voltage fuse is correct. • For 100/120V operation, use an IEC 127 5×20 mm, 0.315 A, 250 V, Agilent part number 2110-0449. • For 220/240V operation, use an IEC 127 5×20 mm, 0.16 A, 250 V, Agilent part number 2110-0448.

  • Page 19: 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 20 Various power cables are available to connect the Agilent 83430A to ac power outlets unique to specific geographic areas. The cable appropriate for the area to which the Agilent 83430A is originally shipped is included with the unit. You can order additional ac power cables for use in different geographic areas.

  • Page 21: Step 4. Turn On The Agilent 83430A

    The front-panel LINE switch disconnects the mains circuits from the mains sup- ply after the EMC filters and before other parts of the instrument. If the Agilent 83430A fails to turn on properly, consider the following possibili- ties: ❒ Is the line fuse good? ❒...

  • Page 22: Returning The Instrument For Service

    Technologies Service Offices” on page 4-6 for a list of service offices. Agilent Technologies Instrument Support Center... (800) 403-0801 If the instrument is still under warranty or is covered by an Agilent Technolo- gies maintenance contract, it will be repaired under the terms of the warranty or contract (the warranty is at the front of this manual).
  • Page 23 They may also cause instrument damage by generating static electricity. 3 Pack the instrument in the original shipping containers. Original materials are available through any Agilent Technologies office. Or, use the following guidelines: • Wrap the instrument in antistatic plastic to reduce the possibility of damage caused by electrostatic discharge.
  • Page 24 Getting Started Returning the Instrument for Service Sealed Air Corporation (Commerce, California 90001). Air Cap looks like a plastic sheet filled with air bubbles. Use the pink (antistatic) Air Cap™ to reduce static electricity. Wrapping the instrument several times in this ma- terial will protect the instrument and prevent it from moving in the carton.

  • Page 26: Making Measurements

    Using the Agilent 83430A 2-3 Front-panel Features 2-3 Example Uses 2-5 Cleaning Connections for Accurate Measurements 2-9 Making Measurements...
  • Page 27 In this chapter, you’ll find examples of making measurements using the Agilent 83430A. The last section of this chapter explains how to maintain top performance of your instrument by using proper handling and cleaning techniques. Be sure to read this section before using your Agilent 83430A.

  • Page 28: Using The Agilent 83430A

    Making Measurements Using the Agilent 83430A Using the Agilent 83430A Front-panel Features The following paragraphs describe the Agilent 83430A front-panel features. LINE key Disconnects the mains circuit from the mains supply after the EMC filters and before other parts of the instrument.
  • Page 29 Making Measurements Using the Agilent 83430A DIGITAL IN (AC COUPLED) Modulation input for digital signals. The input is AC coupled. BNC connector. DIGITAL IN (DC COUPLED) Modulation input for analog signals. This input is DC coupled. BNC connector. WAVELENGTH ADJUST knob Allows you to adjust the laser’s wavelength when...
  • Page 30 Using the Agilent 83430A Example Uses Testing optical receiver sensitivity You can use the Agilent 83430A to measure the minimum sensitivity of an optical receiver. The following figure shows one possible test setup which uses the following equipment: • Agilent 83430A •...
  • Page 31 Making Measurements Using the Agilent 83430A...
  • Page 32 1 meter fiber and adjust the attenuator to achieve the desired BER. The difference in received power is the dispersion power penalty. The Agilent 83430A can be used as a reference source to isolate sys- tem component causes of undesired dispersion power penalty results.
  • Page 33 BER. The Agilent 83430A and an Agilent 71501C jitter tolerance system can be used to test jitter tolerance. The following figure shows a test setup for using the Agilent 83430A and 71501C to test for jitter tolerance.

  • Page 34: Cleaning Connections For Accurate Measurements

    Connectors also vary in the polish, curve, and concentricity of the core within the cladding. Mating one style of cable to another requires an adapter. Agilent Technologies offers adapters for most instruments to allow testing with many different cables.
  • Page 35 Making Measurements Cleaning Connections for Accurate Measurements tions take repeatability uncertainty into account? • Will a connector degrade the return loss too much, or will a fusion splice be re- quired? For example, many DFB lasers cannot operate with reflections from connectors.
  • Page 36 0.2 µm. This process, plus the keyed axis, allows very precise core-to-core alignments. This connector is found on most Agilent Technologies lightwave instruments. 2-11...
  • Page 37 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 if the glass face is not affected, scratches or grit can cause the glass fiber to move out of alignment.
  • Page 38 Making Measurements Cleaning Connections for Accurate Measurements Use the following guidelines to achieve the best possible performance when making measurements on a fiber-optic system: • Never use metal or sharp objects to clean a connector and never scrape the connector. •...
  • Page 39 Making Measurements Cleaning Connections for Accurate Measurements Figure 2-6. Damage from improper cleaning. While these often work well on first insertion, they are great dirt magnets. The oil or gel grabs and holds grit that is then ground into the end of the fiber. Also, some early gels were designed for use with the FC, non-contacting con- nectors, using small glass spheres.
  • Page 40 Making Measurements Cleaning Connections for Accurate Measurements • Keep connectors covered when not in use. • Use fusion splices on the more permanent critical nodes. Choose the best con- nector possible. Replace connecting cables regularly. Frequently measure the return loss of the connector to check for degradation, and clean every connec- tor, every time.
  • Page 41 Cleaning Connectors The procedures in this section provide the proper steps for cleaning fiber- optic cables and Agilent Technologies universal adapters. The initial cleaning, using the alcohol as a solvent, gently removes any grit and oil. If a caked-on layer of material is still present, (this can happen if the beryllium-copper sides of the ferrule retainer get scraped and deposited on the end of the fiber during insertion of the cable), a second cleaning should be performed.
  • Page 42 Making Measurements Cleaning Connections for Accurate Measurements Table 2-2. Dust Caps Provided with Lightwave Instruments Item Agilent Part Number Laser shutter cap 08145-64521 FC/PC dust cap 08154-44102 Biconic dust cap 08154-44105 DIN dust cap 5040-9364 HMS10/dust cap 5040-9361 ST dust cap 5040-9366 To clean a non-lensed connector C A U T I O N...
  • Page 43 To clean an adapter The fiber-optic input and output connectors on many Agilent Technologies instruments employ a universal adapter such as those shown in the following picture. These adapters allow you to connect the instrument to different types of fiber-optic cables.
  • Page 44 Specifications 3-3 Regulatory Information 3-6 Specifications and Regulatory Information...
  • Page 45 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 46 Specifications and Regulatory Information Specifications Specifications Table 3-1. Center Wavelength Center Center Option Option Wavelength Wavelength ± ± Standard 1550 1 nm 1546.2 1 nm ± ± 1310 20 nm 1546.92 1 nm ± ± 1532.68 1 nm 1547.72 1 nm ±...

  • Page 47: Specifications And Regulatory Information Specifications

    Specifications and Regulatory Information Specifications Table 3-2. General Specifications Eye Mask Performance Conforms to GR-253 and ITU G.957 requirements at OC-1, OC-3/STM-1, OC-12/STM-4, OC-48/STM-16 ± ± Wavelength Adjustment Range 1.25 nm ( 1.8 nm typical) ± ° (over 25 C ambient temperature range) ±...
  • Page 48 Specifications and Regulatory Information Specifications Table 3-3. Input Modulation DIGITAL IN AC COUPLED DIGITAL IN DC COUPLED ANALOG IN AC COUPLED Maximum Input Level 2 V p-p –4.5 to 0 V 2 V p-p Bit Rate DC to 2500 Mb/s 0.1 to 2500 MHz 50 to 2500 Mb/s (3 dB bandwidth)

  • Page 49: Regulatory Information

    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 POLLU- TION DEGREE 2, per IEC 1010 and 664 respectively.
  • Page 50 Specifications and Regulatory Information Regulatory Information...
  • Page 52 Options 4-2 Front-Panel Fiber-Optic Adapters 4-4 Power Cords 4-5 Agilent Technologies Service Offices 4-6 Reference...

  • Page 53: Reference Options

    Reference Options Options Table 4-1. Center Wavelength Options Center Center Option Option Wavelength Wavelength ± ± Standard 1550 1 nm 1546.2 1 nm ± ± 1310 20 nm 1546.92 1 nm ± ± 1532.68 1 nm 1547.72 1 nm ± ±...
  • Page 54 Reference Options Table 4-2. Output Interface Options Option Description Diamond HMS-10 fiber-optic input connector interface DIN 47256 fiber-optic input connector interface ST fiber-optic input connector interface SC fiber-optic input connector interface Angled contact fiber-optic output interface...

  • Page 55: Front-Panel Fiber-Optic Adapters

    Reference Front-Panel Fiber-Optic Adapters Front-Panel Fiber-Optic Adapters Front Panel Fiber-Optic Description Agilent Part Number Adapter Diamond HMS-10 81000AI 81000FI FC/PC 81000GI 81000KI 81000SI 81000VI Biconic 81000WI Dust Covers FC connector 1005-0594 Diamond HMS-10 connector 1005-0593 DIN connector 1005-0595 ST connector 1005-0596 SC connector 1005-0597...

  • Page 56: Power Cords

    Reference Power Cords Power Cords Length Plug Type Cable Part No. Plug Description Color Country (in/cm) 250V 8120-1351 Straight *BS1363A 90/228 Gray United Kingdom, 8120-1703 90° 90/228 Mint Gray Cyprus, Nigeria, Zimba- bwe, Singapore 250V 8120-1369 Straight *NZSS198/ASC 79/200 Gray Australia, New Zealand 90°...

  • Page 57: Agilent Technologies Service Offices

    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/country/English/ index.html, or call one of the numbers listed below.

  • Page 58: Servicing

    General Information 5-4 Electrostatic Discharge Information 5-7 Troubleshooting 5-9 If the output power is low 5-10 To check the line-power fuse 5-11 Performance Tests 5-13 Test 1. Digital Threshold 5-15 Test 2. Frequency Response (ANALOG IN) 5-17 Test 3. Electrical Return Loss (ANALOG IN) 5-20 Test 4.
  • Page 59 The laser assembly, A2A1, in this instrument is not field serviceable. Safety first! Before servicing the Agilent 83430A, familiarize yourself with the safety mark- ings on the instrument and the safety instructions in this manual. This instru- ment has been manufactured and tested according to international safety standards.
  • Page 60 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 0.315A/250V for 100/120V operation and 0.16A/250V for 220/240V operation). The use of other fuses or materials is prohibited. W A R N I N G Use of controls or adjustment or performance of procedures other than those specified herein may result in hazardous radiation...

  • Page 61: General Information

    Servicing General Information General Information Whenever you contact Agilent Technologies about your Agilent 83430A, have the complete serial number and option designation available. This will ensure you obtain accurate service information. • Refer to Table 5-1 for a list of internal labels.
  • Page 62 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 Assemblies and Cables Reference Description Designator...
  • Page 63 Servicing General Information...

  • Page 64: 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 65 Servicing Electrostatic Discharge Information To ensure user safety, the static-safe accessories must provide at least 1 MΩ of isolation from ground. Refer to Table 5-4 for information on ordering static- safe accessories. 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.

  • Page 66: Troubleshooting

    Servicing Troubleshooting Troubleshooting The following procedures are located in this section: If the output power is low 5-10 To check the line-power fuse 5-11 W A R N I N G The opening of covers or removal of parts is likely to expose dangerous voltages.
  • Page 67 Servicing Troubleshooting If the output power is low Check for the following common problems: ❒ Clean the OPTICAL OUT connector as described in “Cleaning Connections for Ac- curate Measurements” on page 2-9. ❒ Perform the adjustment procedures. 5-10...
  • Page 68 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 pry open the fuse holder door. C A U T I O N You must remove the voltage tumbler to change the voltage selector.
  • Page 69 Servicing Troubleshooting 5-12...

  • Page 70: 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 Agilent 83430A to warm up for 15 minutes before doing any of the performance tests.
  • Page 71 Servicing Performance Tests Table 5-5. Required Test Equipment Agilent Equipment Recommended Critical Specifications Model Optical spectrum analyzer 71450B Equipment substitution not recommended. Wavelength accuracy must be ±0.5 nm or better. ≥ Digital voltage meter 34401A 150 Vdc range. 1 mV accuracy. Digitizing oscilloscope 83480A with >10 GHz bandwidth...
  • Page 72 Servicing Performance Tests Test 1. Digital Threshold 1 Connect the equipment as shown in the following figure. Figure 5-1. Equipment setup 5-15...
  • Page 73 5 Disconnect the modulation signal from the DIGITAL IN AC COUPLED connector, and connect it to the DIGITAL IN DC COUPLED connector. 6 Press the Agilent 83430A’s front-panel SELECT key so that the DIGITAL IN DC COUPLED light is on.
  • Page 74 Servicing Performance Tests Test 2. Frequency Response (ANALOG IN) This performance test checks the 80% modulation level and the frequency response at that level. 1 Connect the equipment as shown in the following figure. Figure 5-2. Equipment setup 2 Set the pattern generator to the following settings. For step-by-step instructions on setting these values, refer to “Configuring the pattern 5-17...
  • Page 75 ..........850 mV 3 Press the Agilent 83430A’s front-panel SELECT key repeatedly until the ANALOG IN AC COUPLED light is on.
  • Page 76 Servicing Performance Tests Figure 5-3. Equipment setup 16 Press the PRESET key on the Agilent 8752C network analyzer. 17 Set the Agilent 8752C to the following settings: RF output power ......... . . –10 dBm amplitude scale .
  • Page 77 Servicing Performance Tests Test 3. Electrical Return Loss (ANALOG IN) This procedure measures the electrical return loss for this connection when the drive level is less than the power required for 80% modulation. 1 Press the PRESET key on the Agilent 8752C network analyzer. Figure 5-4.
  • Page 78 ........... 801 5 Press the Agilent 83430A’s front-panel SELECT key repeatedly until the ANALOG IN AC COUPLED light is on.
  • Page 79 A through calibration is not required. 3 Connect the equipment as shown in the following figure. Figure 5-6. Equipment setup 4 Press the Agilent 83430A’s front-panel SELECT key so that the DIGITAL IN AC COUPLED light is on. 5 Restart averaging on the Agilent 8752C.
  • Page 80 2 GHz to 2.5 GHz ......... . . >6.07 dB 11 Disconnect the Agilent 8752C from the Agilent 83430A.
  • Page 81 Servicing Performance Tests Test 5. Eye Quality (DIGITAL IN) This test checks the quality of the eye diagram with a modulation rate of 2.48832 Gb/s. 1 Connect the equipment as shown in the following figure. Figure 5-7. Equipment setup for eye quality 5-24...
  • Page 82 ..........850 mV 3 Press the Agilent 83430A’s front-panel SELECT key so that the DIGITAL IN AC COUPLED light is on.
  • Page 83 Servicing Performance Tests Test 6. STM-16/OC-48 Conformance 1 Connect the equipment as shown in the following figure. Figure 5-8. Equipment setup for eye quality 2 Set the pattern generator to the following settings. For step-by-step instructions on setting these values, refer to “Configuring the pattern generator”...
  • Page 84 4 On the Agilent 83480A digital communications analyzer, adjust the amplitude scale, time scale, and offsets as needed. 5 Adjust the Agilent 83430A’s front-panel DIGITAL THRESHOLD knob so that a zero crossing occurs at center screen (approximate 50% crossing). 6 On the Agilent 83480A, perform the following steps: a Turn the optical channel on.
  • Page 85 Servicing Performance Tests Test 7. OC-1 Conformance 1 Connect the equipment as shown in the following figure. Figure 5-9. Equipment setup for OC-1 conformance 5-28...
  • Page 86 Servicing Performance Tests 2 Set the pattern generator to the following settings. For step-by-step instructions on setting these values, refer to “Configuring the pattern generator” on page 5-35. data pattern ..........2 –1 data amplitude (ECL) .
  • Page 87 Servicing Performance Tests 14 Press Run Until, and wait for 300 waveforms to be processed. 15 Press the blue shift key and then press Eye mask to display the eye mask results.Verify that there are no mask or margin hits. 5-30...
  • Page 88 Servicing Performance Tests Test 8. Output Power 1 Connect the Agilent 83430A’s OPTICAL OUT connector to a optical power meter. 2 Disconnect any cables connected to the Agilent 83430A’s ANALOG IN or DIGITAL IN input connectors. 3 Turn the Agilent 83430A on, and press the front-panel PRESET/VARIABLE button so that the BIAS ADJUST light is off.
  • Page 89 +2.5 dBm. 13 Remove the cable from the DIGITAL IN DC COUPLED input connector. 14 Press the Agilent 83430A’s front-panel SELECT key repeatedly until the ANALOG IN AC COUPLED light is on. 15 Make sure that the front-panel BIAS ADJUST knob is fully clockwise.
  • Page 90 1 Connect the equipment as shown in the following figure. Figure 5-10. Equipment setup for output wavelength 2 Turn on the Agilent 83430A and the optical spectrum analyzer, and allow them to warm up for 30 minutes. 3 Perform a user wavelength calibration of the optical spectrum analyzer as described in the User’s Guide for the optical spectrum analyzer.
  • Page 91 Servicing Performance Tests 9 Verify that the measured wavelength is within 1 nm of the Agilent 83430A’s nominal value. If the Agilent 83430A is an Option 130, the wavelength must be within 20 nm of the nominal value. 5-34...
  • Page 92 Servicing Performance Tests Configuring the pattern generator This procedure shows you, step-by-step, how to configure the Agilent 70841B pattern generator settings for the performance tests and adjustment proce- dures. It is assumed, that the Agilent 70311A clock source is configured in the modular measurement system (MMS) mainframe as a slave to the pattern gen- erator module.

  • Page 93: Adjustment Procedures

    Servicing Adjustment Procedures Adjustment Procedures Perform the adjustments in this section if the instrument fails any of its per- formance tests. Periodic adjustment is not required to maintain safety. The following adjustment procedures are provided in this section: To remove the instrument cover 5-38 Adjustment 1.
  • Page 94 Servicing Adjustment Procedures Table 5-6. Required Test Equipment Agilent Equipment Recommended Critical Specifications Model ≥ Digital voltage meter 34401A 150 Vdc range. 1 mV accuracy. Digitizing oscilloscope 83480A with >10 GHz bandwidth ≤ 83483A and 10 ps/div amplitude scale ≥ 83485A 500 MHz triggering, optical input with built-in SDH filter.
  • Page 95 Servicing Adjustment Procedures To remove the instrument cover C A U T I O N Electrostatic discharge (ESD) can damage or destroy electronic components. All work on electronic assemblies should be performed at a static-safe work station. Refer to “Electrostatic Discharge Information” on page 5-7 for more information on preventing ESD.
  • Page 96 A3 Power Supply Assembly. Because the +5V ADJ potentiometer is not used in this instrument, it is not adjusted. 1 Connect the line-power cord to the Agilent 83430A’s rear panel connector. 2 Turn on the Agilent 83430A.
  • Page 97 Servicing Adjustment Procedures Figure 5-11. Location of A3 power supply adjustments 5-40...
  • Page 98 Servicing Adjustment Procedures Adjustment 2. Laser Bias and Control 1 Locate each adjustment potentiometer shown in the following figure. Turn each potentiometer fully counterclockwise. Figure 5-12. Location of A2 main board adjustments 5-41...
  • Page 99 5 Adjust the THRESH BIAS potentiometer so that the output power measures –10.0 ±0.2 dBm. 6 Connect the output of the pattern generator to the Agilent 83430A’s front- panel DIGITAL IN DC COUPLED connector. 7 Configure the Agilent 70841B pattern generator to output an ECL logic level 1: a Set the pattern generator to the following settings.
  • Page 100 16 varies less than 20 mV when the pattern generator signal is present and then removed. 13 Disconnect the pattern generator signal from the Agilent 83430A. 14 Press the front-panel SELECT key so that the ANALOG IN AC COUPLED connector is selected.
  • Page 101 17 Connect the equipment as shown in the following figure. Figure 5-13. Equipment setup for laser bias 18 Turn the Agilent 83430A’s LINE switch on, and clear the Agilent 83480A’s display. 19 On the Agilent 83430A, press the PRESET/VARIABLE button so that the BIAS ADJUST light is off.
  • Page 102 When the dark calibration is complete, press Format to select decibels. h Press Enter to complete the measurement setup. 21 On the Agilent 83430A, press the front-panel PRESET/VARIABLE button so that the BIAS ADJUST light is on. 22 Turn the Agilent 83430A’s front-panel BIAS ADJUST knob fully clockwise.
  • Page 104 Index of cabinet, vi, 1-2, of fiber optics, AC COUPLED connector, center wavelength specifications, ac power cables, 1-9, classification accessories laser, v, static-safe, product, vi, accuracy, measurement, cleaning adapters, adapters, 2-18 fiber optic, cabinet, vi, adjustable features, fiber-optic connections, 2-9, 2-17 adjusting non-lensed connectors,...
  • Page 105 Index DIGITAL IN performance test, 5-22 ECL, ESD (electrostatic discharge), 5-4, 5-7, 5-38 modulation specifications, extinction ratio inspecting adjustment range, instrument, measurement, 5-27, 5-29, 5-45 installing, optical signals, instrument specification, cover, removing, 5-38 eye diagram options, performance test, 5-24 returning for service, 1-11 zero crossing, 5-16...
  • Page 106 Index preset wavelength, PRESET/VARIABLE, noise declaration, noise, relative intensity, rack mounting requirements, radiation exposure, v, OC-1 conformance rear panel performance test, 5-28 label, OC-48 filter, 5-18, 5-25, 5-44 voltage selector, OC-48/STM-16 conformance receiver sensitivity, optical, performance test, 5-26 regulatory one-port reflection measurement, 5-20, 5-22 duration, operating specifications,...
  • Page 107 Index side-mode suppression ratio, wide-band jitter, measuring, spare fuse, 1-6, 5-11 specifications center wavelength, zero crossing, eye diagram, 5-16 definition of terms, general, operating, spectral width, static-safe accessories, STM-16/OC-48 conformance performance test, 5-26 storage temperature, suppression ratio, side-mode, swabs, 2-16 system test capabilities, test capabilities of system, test equipment...

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