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5-2

Servicing

Servicing

Servicing

In this chapter, you'll find information on troubleshooting, testing perfor-
mance, adjusting, and replacing parts in the instrument.

W A R N I N G

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. To ensure safe operation of the instrument and the personal safety
of the user and service personnel, the cautions and warnings in this manual
must be heeded. Refer to the summary of safety considerations at the front of
this manual.

W A R N I N G

These servicing instructions are for use by qualified personnel only.
To avoid electrical shock, do not perform any servicing unless you are
qualified to do so.

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.

W A R N I N G

This is a Safety Class 1 Product (provided with a protective earthing
ground incorporated in the power cord). The mains plug shall only be
inserted in a socket outlet provided with a protective earth contact.
Any interruption of the protective conductor inside or outside of the
product is likely to make the product dangerous. Intentional
interruption is prohibited.

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Содержание 83430A

Страница 1: ...underutilized and idle equipment along with credit for buybacks and trade ins Custom engineering so your equipment works exactly as you specify Critical and expedited services Leasing Rentals Demos In...

Страница 2: ...Agilent 83430A Lightwave Transmitter User s Guide...

Страница 3: ...o defects resulting from improper or inadequate maintenance by Buyer Buyer supplied software or interfac ing unauthorized modifica tion or misuse operation outside of the environmental specifications...

Страница 4: ...h speed TDM time division multiplexed and WDM wavelength division multiplexed optical receivers and systems it is SDH SONET compliant User Adjustable Features The Agilent 83430A offers several user ad...

Страница 5: ...jitter with an Agilent 71501C jitter and eye diagram analyzer Performance testing for WDM optical MUX DEMUX channels including BER and system variations caused by cross phase modulation and Raman eff...

Страница 6: ...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 operato...

Страница 7: ...e parts Do not attempt to clean internally WAR N I N G This is a Safety Class 1 product provided with a protective earthing ground incorporated in the power cord The mains plug shall only be inserted...

Страница 8: ...The ambient temperature outside the cabinet must be less than the maximum operating temperature of the product by 4 C for every 100 watts dissipated in the cabinet If the total power dissipated in the...

Страница 9: ......

Страница 10: ...Making Measurements Using the Agilent 83430A 2 3 Cleaning Connections for Accurate Measurements 2 9 3 Specifications and Regulatory Information Specifications 3 3 Regulatory Information 3 6 4 Referenc...

Страница 11: ......

Страница 12: ...1 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...

Страница 13: ...y interruption of the protective conductor inside or outside of the product is likely to make the product dangerous Intentional interruption is prohibited C AUT IO N This product has autoranging line...

Страница 14: ...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...

Страница 15: ...rrier 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 trans...

Страница 16: ...1 5 Getting Started Step 1 Inspect the Shipment...

Страница 17: ...if it is connected 3 Use a small flat blade screwdriver to pry open the fuse holder door C AUT IO N You must remove the voltage tumbler to change the voltage selector Rotating the voltage tumbler whi...

Страница 18: ...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 WAR N I N G For continued protection against fire hazard replace line fuse onl...

Страница 19: ...is correct as described in the following paragraphs Damage to the equipment could result C AUT IO N This instrument has autoranging line voltage input Be sure the supply voltage is within the specifie...

Страница 20: ...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...

Страница 21: ...s 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 Does the line socke...

Страница 22: ...enance 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 Agilen...

Страница 23: ...N Instrument damage can result from using packaging materials other than the original materials Never use styrene pellets as packaging material They do not adequately cushion the instrument or preven...

Страница 24: ...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 t...

Страница 25: ......

Страница 26: ...2 Using the Agilent 83430A 2 3 Front panel Features 2 3 Example Uses 2 5 Cleaning Connections for Accurate Measurements 2 9 Making Measurements...

Страница 27: ...ter 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 clean...

Страница 28: ...mains supply after the EMC filters and before other parts of the instrument SELECT button Selects between three modulation inputs ANA LOG IN AC COUPLED DIGITAL IN AC COUPLED and DIGI TAL IN DC COUPLED...

Страница 29: ...at the front panel light turns on PRESET VARIABLE button Toggles between preset laser wavelength or amplitude settings Light turns on to indicate you can adjust the setting using the knob BIAS ADJUST...

Страница 30: ...nitor output Agilent 8153A optical power meter The bit error rate BER is monitored as the power to the optical receiver is reduced The minimum sensitivity limit is found when the BER increases to some...

Страница 31: ...2 6 Making Measurements Using the Agilent 83430A...

Страница 32: ...zer The system is first tested with a 1 meter length of fiber Use the attenuator to adjust the received power until the desired BER is measured Substitute a long length of fiber for the 1 meter fiber...

Страница 33: ...ger maintain the desired 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...

Страница 34: ...in the mechanical assembly that holds the ferrule in position against another identical ferrule Connectors also vary in the polish curve and concentricity of the core within the cladding Mating one s...

Страница 35: ...presents a good compromise between performance reli ability and cost If properly maintained and cleaned this connector can withstand many repeated connections However many instrument specifications re...

Страница 36: ...ction of the Diamond HMS 10 connector The nickel silver allows an active centering process that permits the glass fiber to be moved to the desired position This process first stakes the soft nickel si...

Страница 37: ...e end of the fiber any stray particles or finger oil can have a significant effect on connector performance Where many repeat connections are required use of a connector saver or patch cable is recomm...

Страница 38: ...ieve 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 Avoid matching gel and oils Fig...

Страница 39: ...er optic cable into a connector gently insert it in as straight a line as possible Tipping and inserting at an angle can scrape material off the inside of the connector or even break the inside sleeve...

Страница 40: ...erformance they can be used to determine connector degradation A smooth polished fiber end should pro duce a good return loss measurement The quality of the polish establishes the difference between t...

Страница 41: ...nectors 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 r...

Страница 42: ...clean lint free cotton swab or lens paper 4 Clean the fiber end with the swab or lens paper Do not scrub during this initial cleaning because grit can be caught in the swab and become a gouging eleme...

Страница 43: ...adapters allow you to connect the instrument to different types of fiber optic cables Figure 2 7 Universal adapters 1 Apply isopropyl alcohol to a clean foam swab Cotton swabs can be used as long as n...

Страница 44: ...3 Specifications 3 3 Regulatory Information 3 6 Specifications and Regulatory Information...

Страница 45: ...ature range 0 C to 45 C and relative humidity 95 unless otherwise noted All speci fications apply after the instrument s temperature has been stabilized after 15 minutes of continuous operation Charac...

Страница 46: ...nm 501 1550 12 1 nm 358 1535 82 1 nm 509 1550 92 1 nm 366 1536 61 1 nm 517 1551 72 1 nm 374 1537 40 1 nm 525 1552 52 1 nm 382 1538 19 1 nm 533 1553 33 1 nm 390 1539 1 nm 534 1553 4 1 nm 398 1539 77 1...

Страница 47: ...bias condition 1 3 mW minimum 1 dBm Average Coupled Power Analog Mode preset bias condition 0 63 mW minimum 2 0 dBm Relative Intensity Noise characteristic RIN 1 GHz 145 dB Hz Spectral Width measured...

Страница 48: ...to 1 GHz 12 dB 12 dB 12 dB 1 to 2 GHz 8 5 dB 8 5 dB 9 dB 2 to 2 5 GHz 6 dB 6 dB 6 dB a Tested with 223 1 PRBS pattern Table 3 4 Operating Specifications Use Indoor Power 115 VAC 50 WATTS MAX 230 VAC 5...

Страница 49: ...ALLATION CATEGORY II and POLLU TION DEGREE 2 per IEC 1010 and 664 respectively Notice for Germany Noise Declaration This is to declare that this instrument is in conformance with the German Reg ulatio...

Страница 50: ...3 7 Specifications and Regulatory Information Regulatory Information...

Страница 51: ......

Страница 52: ...4 Options 4 2 Front Panel Fiber Optic Adapters 4 4 Power Cords 4 5 Agilent Technologies Service Offices 4 6 Reference...

Страница 53: ...m 358 1535 82 1 nm 509 1550 92 1 nm 366 1536 61 1 nm 517 1551 72 1 nm 374 1537 40 1 nm 525 1552 52 1 nm 382 1538 19 1 nm 533 1553 33 1 nm 390 1539 1 nm 534 1553 4 1 nm 398 1539 77 1 nm 541 1554 13 1 n...

Страница 54: ...on Description 011 Diamond HMS 10 fiber optic input connector interface 013 DIN 47256 fiber optic input connector interface 014 ST fiber optic input connector interface 017 SC fiber optic input connec...

Страница 55: ...0 81000AI FC PCa a The FC PC adapter is the standard adapter supplied with the instrument Options 011 013 014 and 017 replace the standard interface 81000FI D4 81000GI SC 81000KI DIN 81000SI ST 81000V...

Страница 56: ...nations 125V 8120 1378 8120 1521 8120 1992 Straight NEMA5 15P 90 Straight Medical UL544 90 228 90 228 96 244 Jade Gray Jade Gray Black United States Canada Mexico Philippines Taiwan 250V 8120 2104 812...

Страница 57: ...rs listed below Agilent Technologies Service Numbers Austria 01 25125 7171 Belgium 32 2 778 37 71 Brazil 11 7297 8600 China 86 10 6261 3819 Denmark 45 99 12 88 Finland 358 10 855 2360 France 01 69 82...

Страница 58: ...3 Electrical Return Loss ANALOG IN 5 20 Test 4 Electrical Return Loss DIGITAL IN 5 22 Test 5 Eye Quality DIGITAL IN 5 24 Test 6 STM 16 OC 48 Conformance 5 26 Test 7 OC 1 Conformance 5 28 Test 8 Outpu...

Страница 59: ...s at the front of this manual WAR N I N G These servicing instructions are for use by qualified personnel only To avoid electrical shock do not perform any servicing unless you are qualified to do so...

Страница 60: ...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 WAR N I N G Use of controls or adjustment o...

Страница 61: ...Clean the cabinet using a damp cloth only Protect against ESD damage Electrostatic discharge ESD can damage or destroy electronic components All work on electronic assemblies should be performed at a...

Страница 62: ...1623 TORX T 15 driver 8710 1622 Table 5 3 Major Assemblies and Cables Reference Designator Description A1 Front Panel Assembly A2 Main Board Assembly A2A1 Laser not field serviceable A3 Power Supply B...

Страница 63: ...5 6 Servicing General Information...

Страница 64: ...at a static safe work station The following figure shows an example of a static safe work station using two types of ESD protection Conductive table mat and wrist strap combination Conductive floor ma...

Страница 65: ...king on circuitry with a voltage potential greater than 500 volts Table 5 4 Static Safe Accessories Agilent Part Number Description 9300 0797 3M static control mat 0 6 m 1 2 m 2 ft 4 ft and 4 6 cm 15...

Страница 66: ...line power fuse 5 11 WAR 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 WAR N I N...

Страница 67: ...leshooting 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 ad...

Страница 68: ...ening in the fuse holder door 5 The fuse is housed in a small container next to the voltage tumbler Insert the tip of a screwdriver on the side of the container and gently pull outward to remove the c...

Страница 69: ...5 12 Servicing Troubleshooting...

Страница 70: ...1 Digital Threshold 5 15 Test 2 Frequency Response ANALOG IN 5 17 Test 3 Electrical Return Loss ANALOG IN 5 20 Test 4 Electrical Return Loss DIGITAL IN 5 22 Test 5 Eye Quality DIGITAL IN 5 24 Test 6...

Страница 71: ...mV p p output Rise fall times 100 ps Clock 32 trigger 50 output Clock source 70311A 16 1 MHz to 3 3 GHz 50 output 120 dBc noise Sinewave or Squarewave 500 mV p p to 1500 mV p p Mainframe 70001A Speci...

Страница 72: ...5 15 Servicing Performance Tests Test 1 Digital Threshold 1 Connect the equipment as shown in the following figure Figure 5 1 Equipment setup...

Страница 73: ...clockwise and fully counterclockwise observe the following items The eye is not squelched for any setting of the knob The eye diagram s zero crossing varies as the knob is turned The eye diagram s ze...

Страница 74: ...cks 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 se...

Страница 75: ...On the Agilent 83480A position voltage cursor 1 to the displayed unmodulated level 8 Turn the Agilent 83430A s LINE switch off 9 On the Agilent 83480A position voltage cursor 2 to the displayed dark...

Страница 76: ...lowing settings RF output power 10 dBm amplitude scale 3 dB division start frequency 0 3 MHz stop frequency 3000 MHz marker 1 reference marker 0 3 MHz averaging on averaging number 16 trace points 801...

Страница 77: ...d for 80 modulation 1 Press the PRESET key on the Agilent 8752C network analyzer Figure 5 4 Calibration kit connections 2 With averaging on calibrate the Agilent 8752C for a 1 port reflection measurem...

Страница 78: ...arker 0 3 MHz averaging on averaging number 16 trace points 801 5 Press the Agilent 83430A s front panel SELECT key repeatedly until the ANALOG IN AC COUPLED light is on 6 Press the MEAS key on the Ag...

Страница 79: ...ng 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 6 Confirm that the retur...

Страница 80: ...icing Performance Tests 10 Confirm that the return loss meets the following requirements 1 0 GHz 12 07 dB 1 GHz to 2 GHz 9 07 dB 2 GHz to 2 5 GHz 6 07 dB 11 Disconnect the Agilent 8752C from the Agile...

Страница 81: ...e 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 Equipme...

Страница 82: ...eros clock rate 2 48832 GHz clock amplitude 850 mV 3 Press the Agilent 83430A s front panel SELECT key so that the DIGITAL IN AC COUPLED light is on 4 Set the Agilent 83480A digital communications ana...

Страница 83: ...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 223 1 data amplitude ECL 850...

Страница 84: ...structions on the screen g When the dark calibration is complete press Format to select decibels h Press Enter to complete the measurement setup 7 Clear the Agilent 83480A s display and allow adequate...

Страница 85: ...5 28 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...

Страница 86: ...cal and follow the instructions on the screen e When the dark calibration is complete press Format to select decibels f Press Enter to complete the measurement setup 4 Clear the Agilent 83480A s disp...

Страница 87: ...ng 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...

Страница 88: ...al output power does not exceed 2 5 dBm 9 Turn the front panel BIAS ADJUST knob fully counterclockwise 10 Connect the pattern generator s output to the Agilent 83430A s DIGITAL IN DC COUPLED input con...

Страница 89: ...left side select pattern softkey j Press user pattern and then INTERNL PATT 1 12 Set the BIAS ADJUST potentiometer fully clockwise then verify that the optical output power does not exceed 2 5 dBm 13...

Страница 90: ...e User s Guide for the optical spectrum analyzer 4 Disconnect any cables connected to the Agilent 83430A s ANALOG IN or DIGITAL IN input connectors 5 On the optical spectrum analyzer press the AUTO AL...

Страница 91: ...cing 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 nomi...

Страница 92: ...rator you can still set its frequency using its own menu Consult the user manuals for these products to learn how to correctly install and operate them 1 Turn on the MMS system and display the menu fo...

Страница 93: ...internal adjustments may change the laser classification of this instrument Always perform the adjustments exactly as described in this section C AUT IO N Option 022 instruments have an angled fiber...

Страница 94: ...ilt in SDH filter Voltage and time histograms Built in SONET SDH eye mask conformance test Pattern generator 70841B 0 1 to 3 3 Gb s 223 1 PRBS 250 mV p p to 1200 mV p p output Rise fall times 100 ps C...

Страница 95: ...Information on page 5 7 for more information on preventing ESD 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 dri...

Страница 96: ...2 Turn on the Agilent 83430A 3 Measure the dc voltage between the OUT violet wire and OUT black wire terminals located on the A3 assembly Adjust the 12V ADJ potentiometer so that the voltage measures...

Страница 97: ...5 40 Servicing Adjustment Procedures Figure 5 11 Location of A3 power supply adjustments...

Страница 98: ...stment 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 mai...

Страница 99: ...ettings For step by step instruc tions on setting these values refer to Configuring the pattern generator on page 5 35 data pattern 223 1 data amplitude ECL 850 mV p p data output high level ECL 900 m...

Страница 100: ...16 LOOP test points 12 Adjust the DRIVE ADJ potentiometer so that the voltage measured across pins 15 and 16 varies less than 20 mV when the pattern generator signal is present and then removed 13 Dis...

Страница 101: ...clear the Agilent 83480A s display 19 On the Agilent 83430A press the PRESET VARIABLE button so that the BIAS ADJUST light is off 20 On the Agilent 83480A digital communications analyzer perform the...

Страница 102: ...el BIAS ADJUST knob fully clockwise 23 Adjust the PRESET BIAS potentiometer so that the extinction ratio measures between 6 0 dB and 8 0 dB Between adjustments be sure to clear the Agilent 83480A s di...

Страница 103: ......

Страница 104: ...cle 3 2 5 13 kit connections 5 20 termination kit 5 20 5 22 capabilities of system iv care of cabinet vi 1 2 5 4 of fiber optics iv center wavelength specifications 3 3 classification laser v 3 6 prod...

Страница 105: ...2 3 fuse 1 6 checking 5 11 spare 5 11 values vi 5 11 G general specifications 3 4 H humidity 3 5 I IEC Publication 61010 1 vi input connector 2 3 2 9 ECL 2 3 modulation specifications 3 5 inspecting i...

Страница 106: ...LOG IN 5 17 OC 1 conformance 5 28 output power 5 31 output wavelength 5 33 required test equipment 5 14 STM 16 OC 48 conformance 5 26 performance verification 5 13 power cable requirements 1 8 power s...

Страница 107: ...capabilities of system iv test equipment adjustment procedures 5 37 performance tests 5 14 threshold digital input iii tools for servicing 5 4 trigger mode setting 5 35 troubleshooting 5 2 check line...

Страница 108: ...uipment Have surplus equipment taking up shelf space We ll give it a new home Learn more Visit us at artisantg com for more info on price quotes drivers technical specifications manuals and documentat...

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