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HP 83447A, Руководство пользователя и сервисное руководство

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Servicing

the

HP

83447A

Adjustment

Procedures

Photodetector

assembly

adjustment

procedure

There

are

two

adjustments

on

the

photodetector

assembly

.

The

R26

+V

APD

adjust

sets

the

APD

bias

for

optimum

sensitivity

.

The

R1

High

Input

Limit

Set

sets

maximum

operating

power

for

jitter

performance

.

Since

the

equipment

setup

is

the

same

as

the

setup

required

for

testing

instrument

sensitivity

,

the

adjustment

procedures

are

included

after

the

performance

test.

Replacement

photodetector

assemblies

come

from

the

factory

pre-adjusted.

Slight

re-adjustments

may

be

required

as

the

instrument

ages

.

4-11

Содержание 83447A

Страница 1: ...User and Service Guide HP 83447A Lightwave Trigger Receiver ...

Страница 2: ...cidental or consequential damages in connection with the furnishing performance or use of this material Restricted Rights Legend Use duplication or disclosure by the U S Government is subject to restrictions as set forth in subparagraph c 1 ii of the Rights in Technical Data and Computer Software clause at DFARS 252 227 7013 for DOD agencies and subparagraphs c 1 and c 2 of the Commercial Computer...

Страница 3: ...Printing History HP Part Number Edition Date 83447 90002 Edition 1 April 1996 iii ...

Страница 4: ...dure which if not correctly performed or adhered to could result in injury or loss of life Do not proceed beyond a warning sign until the indicated conditions are fully understood and met L The instruction manual symbol The product is marked with this symbol when it is necessary for the user to refer to the instructions in the manual A This symbol denotes that the instrument uses alternating curre...

Страница 5: ...r radiates from the instrument s OPTICAL OUT connector It is only slightly attenuated W A R N I N G If this instrument is not used as speci ed the protection provided by the equipment could be impaired This instrument must be used in a normal condition in which all means for protection are intact only W A R N I N G There are many points in the instrument which can if contacted cause personal injur...

Страница 6: ...C A U T I O N This product has autoranging line voltage input Be sure the supply voltage is within the speci ed range vi ...

Страница 7: ...ceable to the United States National Institute of Standards and Technology NIST to the extent allowed by the Institute s calibration facility and to the calibration facilities of other International Standards Organization members Product maintenance agreements and other customer assistance agreements are available for Hewlett Packard products For any assistance contact your nearest Hewlett Packard...

Страница 8: ...instrument will execute its programming instructions when properly installed on that instrument Hewlett Packard does not warrant that the operation of the instrument or software or rmware will be uninterrupted or error free Limitation of Warranty The foregoing warranty shall not apply to defects resulting from improper or inadequate maintenance by Buyer Buyer supplied software or interfacing unaut...

Страница 9: ...eiver Chapter 2 describes how to install the lightwave trigger receiver connect to a high speed optical oscilloscope perform a quick con dence check return the instrument for service and how to clean connections Chapter 3 describes how to perform a waveform test Chapter 4 describes troubleshooting adjustment performance tests and replacement procedures ix ...

Страница 10: ......

Страница 11: ...the fuse 2 5 Step 4 Connect the HP 83447A to a power source 2 6 Step 5 Turn on the HP 83447A 2 9 Connecting the HP 83447A to a Digital Communications Analyzer 2 10 Performing a Quick Con dence Check 2 12 If the veri cation check fails 2 12 How to Return the HP 83447A for Service 2 14 Packaging 2 14 Instrument shipping preparation procedure 2 15 Sales and service o ces 2 16 Cleaning Connections for...

Страница 12: ...1 Through path optical insertion loss 4 13 Test 2 Trigger output amplitude 4 15 Test 3 Trigger output RMS jitter 4 23 Test 4 Trigger port electrical return loss 4 26 Test 5 Input optical return loss 4 29 Replacement Procedures 4 31 Replacing the RF cable or the RF connector 4 32 Replacing the ac cable assembly 4 33 Replacing the power supply 4 35 Replacing the photodetector assembly 4 36 Replaceab...

Страница 13: ...communications analyzer 2 10 3 1 Setup for measuring eye diagram by triggering from recovered trigger 3 4 4 1 HP 83447A block diagram 4 5 4 2 Through path optical insertion loss test setup 4 13 4 3 Laser transmitter setup 4 15 4 4 General test setup 4 17 4 5 Electrical return loss test setup 4 26 4 6 Wiring diagram for the line module 4 33 4 7 Wiring diagram for the power supply terminals 4 35 4 8...

Страница 14: ... 4 2 Voltages on the DC Power Supply Terminals 4 8 4 3 Required Test Equipment 4 12 4 4 Laser Transmitter Setup 4 16 4 5 Trigger Output Amplitude Test Setup 4 18 4 6 Input Optical Return Loss 4 29 4 7 Torque Values 4 32 4 8 Line Module to DC Power Supply Connections 4 34 4 9 DC Power Supply Terminal Connections 4 35 4 10 Assembly Level Replaceable Parts 4 40 4 11 Replaceable Hardware 4 42 Contents...

Страница 15: ...1 General Information ...

Страница 16: ...the HP 83447A lightwave trigger receiver A list of options and accessories available HP 83447A speci cations and characteristics Information about the lightwave receiver s serial number label Information about avoiding damage to the instrument from electrostatic discharge 1 2 ...

Страница 17: ...signal from the APD is ampli ed by an AC coupled two stage limiting ampli er The output can be used as a timing reference such as a trigger signal for an instrument like the HP 83480A digital communications analyzer This technique is similar to splitting an electrical signal from an optical electrical O E converter to trigger an oscilloscope However a key advantage to using the HP 83447A technique...

Страница 18: ...1 HP 83447A block diagram Accessories supplied The HP 83447A lightwave trigger receiver is shipped with Power cable refer to Figure 2 3 FC PC front panel connector interfaces deleted on option 010 HP 83447A Lightwave Trigger Receiver User and Service Guide 1 4 ...

Страница 19: ... equipment s serial number Whenever you contact Hewlett Packard about your lightwave receiver have the complete serial number available to ensure obtaining the most complete and accurate information possible A serial number label is attached to the rear of the lightwave receiver It contains the serial number and the options installed in the lightwave receiver Whenever you specify the serial number...

Страница 20: ...pe N 4 OPTICAL OUT connector This output accepts any of the connector interface adapters from the HP 81000 series 5 OPTICAL IN connector Maximum signal input is 3 dBm and minimum signal input is 020 dBm This input accepts any of the connector interface adapters from the HP 81000 series N O T E Optical output power is typically 1 dB lower than the input power 1 6 ...

Страница 21: ...l Information Description of the HP 83447A W A R N I N G Light energy connected to the instrument s OPTICAL IN connector radiates from the instrument s OPTICAL OUT connector It is only slightly attenuated 1 7 ...

Страница 22: ...C unless otherwise noted All speci cations apply after the instrument s temperature has been stabilized after 30 minutes of continuous operation Characteristics provide useful information by giving functional but nonwarranted performance parameters Characteristics are printed in italics Typical Performance where listed is not warranted but indicates performance which most units will meet Nominal V...

Страница 23: ...ut 020 dBm 200 mV pk pk Characteristics Maximum output jitter 2 measurement 1000 Mb s at 015 dBm 0 012 UI rms 1000 Mb s at 020 dBm 0 02 UI rms 1000 Mb s at 015 dBm 0 03 UI rms 1000 Mb s at 020 dBm 0 05 UI rms Wavelength range 1200 1600 nm Maximum safe continuous optical input power 10 mW peak Nominal trigger output impedance 50 ohms 1 Tested at 1310 nm and 1550 nm using SONET SDH Compliant DFB las...

Страница 24: ...I Compatibility Conducted and radiated emissions meet the requirements of CISPR Publication 11 and EN 55011 Group 1 Class A Power Requirements 100 120 220 240 V 610 47 to 63 Hz Power Consumption Power consumption 75 VA max Installation Category Category II per I E C 1010 Pollution Degree Degree 2 per I E C 664 Usage For indoor use Weight characteristic 3 36 kg 7 5 lb Dimensions H 2 W 2 D 10 2 21 3...

Страница 25: ...Declaration of Conformity 1 11 ...

Страница 26: ...or mat and heel strap combination Both types when used together provide a signi cant level of ESD protection Of the two only the table mat and wrist strap combination provides adequate ESD protection when used alone To ensure user safety the static safe accessories must provide at least 1 M of isolation from ground Refer to Table 1 2 for information on ordering static safe accessories W A R N I N ...

Страница 27: ...General Information Electrostatic Discharge Information Figure 1 3 Example of a static safe work station 1 13 ...

Страница 28: ...from the unit Be sure that all instruments are properly earth grounded to prevent a buildup of static charge Table 1 2 lists static safe accessories that can be obtained from Hewlett Packard using the HP part numbers shown Table 1 2 Static Safe Accessories HP Part Number Description 9300 0797 Set includes 3M static control mat 0 6 m 2 1 2 m 2 ft 2 4 ft and 4 6 cm 15 ft ground wire The wrist strap ...

Страница 29: ...2 Installation and Preparation for Use ...

Страница 30: ...ervice Cleaning connections for accurate measurements This instrument has been designed and tested in accordance with IEC Publication 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 instrument in a safe...

Страница 31: ...ectrically The lightwave trigger receiver is packed within a carton Refer to How to Return the HP 83447A for Service for the description and part numbers of the packaging materials Refer to Accessories in Description of the HP 83447A in Chapter 1 for the accessories shipped with the lightwave receiver If the contents are incomplete or if the lightwave receiver does not pass the veri cation test th...

Страница 32: ... to adapt the lightwave receiver to the power source An improper selector setting can damage the lightwave receiver when it is turned on 1 Pry open the fuse holder door with a small screwdriver Figure 2 1 Opening the fuse holder door C A U T I O N You must remove the voltage tumbler to change the voltage selector Rotating the voltage tumbler while it is in the line module damages the line module 2...

Страница 33: ...e line fuse only with same type and ratings The use of other fuses or materials is prohibited The line fuse is housed in a small container next to the voltage tumbler refer to Figure 2 2 The spare fuse is stored below the line fuse To check the fuse insert the tip of a screwdriver on the side of the container and gently pull outward to remove the container If the fuse is defective or missing insta...

Страница 34: ...ximum Power cable The lightwave receiver is equipped with a three wire power cable in accordance with international safety standards When connected to an appropriate power line outlet this cable grounds the instrument cabinet W A R N I N G Failure to ground the lightwave receiver properly can result in personal injury Before turning on the lightwave receiver you must connect its protective earth t...

Страница 35: ... receiver is originally shipped is included with the unit You can order additional ac power cables for use in di erent areas Figure 2 3 lists the available ac power cables illustrates the plug con gurations and identi es the geographic area in which each cable is appropriate C A U T I O N Always use the three prong ac power cord supplied with this instrument Failure to ensure adequate earth ground...

Страница 36: ...Installation and Preparation for Use Installing the HP 83447A Figure 2 3 AC power cables available 2 8 ...

Страница 37: ...rn on the HP 83447A With the power cable inserted into the line module turn the lightwave receiver on by pressing the line switch The green light emitting diode LED should light If the LED should fail to light refer to Performing a Quick Con dence Check in this chapter 2 9 ...

Страница 38: ...to the Cleaning Connections for Accurate Measurements section later in this chapter for instructions Notice that the connector interface has a small protrusion This protrusion ts in the slot of the optical connector of the front panel 2 Connect an optical cable from the OPTICAL OUT connector on the lightwave trigger receiver to the optical data input connector on the digital communications analyze...

Страница 39: ...ont panel of the trigger receiver 5 Connect the trigger receiver s OPTICAL OUT to the optical input of an HP 83480A which includes a module such as the HP 83485A B or 83481A 6 Connect the TRIGGER OUT to the trigger input of the digital communications analyzer 7 Turn the lightwave trigger receiver on W A R N I N G Light energy connected to the instrument s OPTICAL IN connector radiates from the ins...

Страница 40: ...utput If the veri cation check fails If the trigger receiver does not pass the veri cation check you should review the procedure being performed when the problem occurred A few minutes spent performing some simple checks may save waiting for your instrument to be repaired Before calling Hewlett Packard or returning the unit for service please make the following checks 1 Is the rear panel voltage s...

Страница 41: ...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 lightwave receiver 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 Refer to the How to Return the HP 83447A for Service...

Страница 42: ... for service Any special arrangements for the instrument can be discussed at this time This will help the service o ce to service and return your instrument as quickly as possible Packaging The original shipping containers should be used If the original materials were not retained identical packaging materials are available through any Hewlett Packard o ce Packaging materials are listed below Oute...

Страница 43: ...l serial number of returned instrument List of any accessories returned with instrument 2 Pack the instrument in the appropriate packaging material Refer to Packaging in this section for information about the original packaging material If the original or equivalent packaging materials cannot be obtained instruments can be packaged using the following instructions C A U T I O N Inappropriate packa...

Страница 44: ...rapping the instrument several times in this material will protect the instrument and prevent it from moving in the carton 3 Seal the carton with strong nylon adhesive tape 4 Mark the carton FRAGILE HANDLE WITH CARE 5 Retain copies of all shipping papers Sales and service o ces Hewlett Packard has sales and service o ces located around the world to provide complete support for Hewlett Packard prod...

Страница 45: ... 2000 South Park Place Atlanta GA 30339 404 955 1500 Illinois Hewlett Packard Company 5201 Tollview Drive Rolling Meadows IL 60008 708 342 2000 New Jersey Hewlett Packard Company 150 Green Pond Road Rockaway NJ 07866 201 586 5400 Texas Hewlett Packard Company 930 East Campbell Road Richardson TX 75081 214 231 6101 EUROPEAN FIELD OPERATIONS Headquarters Hewlett Packard S A 150 Route du Nant d Avril...

Страница 46: ...61 3 895 2895 Canada Hewlett Packard Ltd 17500 South Service Road Trans Canada Highway Kirkland Quebec H9J 2X8 Canada 514 697 4232 China China Hewlett Packard Company 38 Bei San Huan X1 Road Shuang Yu Shu Hai Dian District Beijing China 86 1 256 6888 Japan Yokogawa Hewlett Packard Ltd 1 27 15 Yabe Sagamihara Kanagawa 229 Japan 81 427 59 1311 Singapore Hewlett Packard Singapore Ltd Pte Ltd Alexandr...

Страница 47: ...ends contamination and improper use and removal of index matching compounds Use dry connections Dry connectors are easier to clean and to keep clean Dry connections can be used with physically contacting connectors for example 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 degrade performance C A U T ...

Страница 48: ...tant performance characteristic of a lightwave connector Typical values are less than 1 dB of loss and sometimes as little as 0 1 dB of loss with high performance connectors Return loss is another important factor It is a measure of re ection the less re ection the better the larger the return loss the smaller the re ection The best physically contacting connectors have return losses better than 5...

Страница 49: ...the swab or lens paper back and forth across the ber end several times Some amount of wiping or mild scrubbing of the ber end can help remove particles when application of alcohol alone will not remove them This technique can remove or displace particles smaller than one micron 5 Immediately dry the ber end with a clean dry lint free cotton swab or lens paper 6 Blow across the connector end face f...

Страница 50: ...hese deposits are very thin and the risk of other contamination buildup on the inside of adapters greatly outweighs the risk of contamination by foam swabs 2 Clean the adapter with the foam swab 3 Dry the inside of the adapter with a clean dry foam swab 4 Blow through the adapter using ltered dry compressed air Nitrogen gas or compressed dust remover can also be used C A U T I O N Do not shake tip...

Страница 51: ...3 Using the HP 83447A ...

Страница 52: ...le of generating oscilloscope eye diagrams when a separate trigger signal is not available The HP 83447A may also be used as a general purpose receiver when a linear response is not required Its limiting ampli er makes it appropriate for digital signals 3 2 ...

Страница 53: ... of the electrical signal electrical coupler coming out from an O E converter and applies it to the oscilloscope trigger input In case of triggering on an optical data signal an optical coupler carrys a small portion of the optical data signal to a high gain avalanche photodiode O E converter and applies it to the oscilloscope s trigger input Triggering on data versus triggering on clock Trigger s...

Страница 54: ...Using the HP 83447A Waveform Test Figure 3 1 Setup for measuring eye diagram by triggering from recovered trigger 3 4 ...

Страница 55: ...4 Servicing the HP 83447A ...

Страница 56: ...s connected to internal capacitors that may remain live for ve 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 outs...

Страница 57: ... 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 Individual chapters also contain a detailed safety notation W A R N I N G Failure to ground the lightwave trigger receiver properly can result in personal injury as well as instrument damage Before turning on the lightwave trigger receiver connect a t...

Страница 58: ...ic assemblies should be performed at a static safe work station Refer to Electrostatic Discharge Information in Chapter 1 for more information on preventing ESD Required service tools Table 4 1 lists the tools that may be required to service the trigger receiver Table 4 1 Required Tools Description HP Part Number Small Pozidriv screwdriver 8710 0899 Wire cutter 8710 0012 Long nose pliers 8710 1107...

Страница 59: ...Troubleshooting The main functional blocks of the lightwave trigger receiver are the printed circuit card the power supply and the optical coupler Figure 4 1 HP 83447A block diagram 4 5 ...

Страница 60: ...oval 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 ve seconds after disconnecting the plug from its power supply 4 6 ...

Страница 61: ...as a trigger signal Photodetector assembly Modulated light enters the InGaAs avalanche photodetector diode APD through a single mode ber front panel connector The APD converts the modulated light to a current replica of the modulation The APD is biased in the 40 to 100V range by a thermally compensated high voltage bias supply The APD output signal is converted to a voltage and ampli ed by a low n...

Страница 62: ...wer supply from the photodetector and electrical ampli er unit and recheck the 5 V power supply If the power supply is still low replace the power supply If the power supply is operational suspect the photodetector assembly N O T E The power supply 5 V output is a oating output and is wired to supply 05 2 V to the detector card The 012 V power supply is not used The voltages on the power supply te...

Страница 63: ... supply transformer carry ac line voltage You can be killed or seriously injured if you contact them when power is applied 1 On the power supply board connect the multimeter between the 0OUT terminal and the OUT terminal of E2 on the dc power supply 2 Measure the power supply output voltage The voltage reading should be 5 32 Vdc 610 mV N O T E The 5 V power supply circuit has current limiting and ...

Страница 64: ...e HP 83447A Adjustment Procedures 5 Measure the power supply output voltage The voltage reading should be 12 12 Vdc 610 mV 6 If the voltage is not 12 12 Vdc adjust the 12V ADJ for a reading of 12 12 Vdc 610 mV 4 10 ...

Страница 65: ...mum sensitivity The R1 High Input Limit Set sets maximum operating power for jitter performance Since the equipment setup is the same as the setup required for testing instrument sensitivity the adjustment procedures are included after the performance test Replacement photodetector assemblies come from the factory pre adjusted Slight re adjustments may be required as the instrument ages 4 11 ...

Страница 66: ...485A optical plug in HP 8156A optical attenuator with option 101 1300 nm 1550 nm and option 012 FC PC connectors HP 8153A lightwave multimeter HP 81536A power sensor module HP 81534A optical return loss module HP 81554SM laser source module 1300 1550 nm HP 81000BR reference re ector HP 81109AC patchcord HRL Diamond HMS 10 HP HP 8752A network analyzer HP 8493A option 006 6 dB attenuator pad BCP 420...

Страница 67: ...th a 1310 nm source and then with a 1550 nm laser source 1 Clean and connect the optical source ber to the power meter as shown in Figure 4 2 Note the power reading 2 Disconnect the source ber from the power meter and connect it to the HP 83447A OPTICAL INPUT connector 3 Clean and connect an FC PC single mode ber jumper cable from the HP 83447A OPTICAL OUTPUT connector to the power meter 4 13 ...

Страница 68: ...put power reading Record the following at wavelength 1310 nm Source ber power PIN dBm Optical output connector power POUT dBm Through path insertion loss PIN POUT 1 5 dB max at wavelength 1550 nm Source ber power PIN dBm Optical output connector power POUT dBm Through path insertion loss PIN POUT 1 5 dB max 4 14 ...

Страница 69: ...Servicing the HP 83447A Performance Tests Test 2 Trigger output amplitude 1 Connect equipment as shown in Figure 4 3 2 Initialize the instruments Test Setup Figure 4 3 Laser transmitter setup 4 15 ...

Страница 70: ...C adapter 1 00 Vpp drive Optical Attenuator clean the optical connectors calibrate to read actual power fully charged or on an ac adapter Set power to 010 dBm FC PC adapters Optical Power Meter 1310 nm wavelength clean the connector FC PC adapter Digital Communication Analyzer electrical channel OFF optical channel ON Time base units Bit Period Bit rate STM16 OC48 Scale 2 bits 250 W div 0400 mV tr...

Страница 71: ...t the pattern generator output level if necessary for an extinction ratio of 8 2 dB Perform this procedure rst with a 1310 nm source and then with a 1550 nm laser source 8 Connect the equipment as shown in Figure 4 4 Figure 4 4 General test setup 4 17 ...

Страница 72: ...d 1550 nm connect the 1310 nm unit rst then the 1550 nm unit analog mode bias cal mode clean the optical connectors FC PC adapter drive set for 8 2 dB extinction ratio 0ptical Attenuator clean the optical connectors calibrate to read actual power set power to 015 dBm FC PC adapters Optical Power Meter 1310 nm wavelength clean the connector FC PC adapter Digitalizing Oscilloscope electrical channel...

Страница 73: ...plitude on the electrical channel Trigger out It should be above 0 4 vpp average low to average high 14 Place the vertical cursors at the eye mid point and accumulate at least 10 000 samples Record the following at wavelength 1310 nm Optical Power 015 0 dBm 6 1 dB Trigger amplitude must be 400 mVp p at wavelength 1550 nm Optical Power 015 0 dBm 6 1 dB Trigger amplitude must be 400 mVp p 15 Reduce ...

Страница 74: ...just R1 VAPD adjustment 19 The VAPD Adjustment R26 is clearly labeled on the printed circuit card The objective of this adjustment is to set the avalanche photodetector gain for best jitter performance W A R N I N G Hazardous voltage because VAPD is nominally 100 Vdc Use caution when making this measurement Detector bias adjustment 20 Con gure the test equipment as shown in Figure 4 4 21 Initializ...

Страница 75: ...rs and the FC adaptor Wavelength 1310 nm Digital Communications Analyzer Electrical channel on Optical channel o Time division 150 psec div Amplitude division 100 mV div Trigger level 400 mV Trigger polarity negative Display persistence 1 sec O set 0 mV HP 83447A Clean the optical connectors Optical input 010 dBm 22 Connect the HP 83447A and turn the HP 83447A AC power on A 2 48832 Gbps eye diagra...

Страница 76: ...e until the excess noise just disappears High input limit adjustment 28 Turn the laser transmitter on 29 Set the electrical channel vertical sensitivity to 150 mV division 30 Disconnect the optical ber from the OPTICAL INPUT connector 31 Attach the optical ber to the optical power meter 32 Set the attenuator for 3 5 dBm 33 Connect the source to the OPTICAL INPUT on the HP 83447A If no eye diagram ...

Страница 77: ... the analyzer delay is set to 50 nsec for all jitter measurements and the electrical channel is switched on 2 Set the analyzer electrical channel o set to 0 0 VDC 3 Set the optical power into the HP 83447A to 015 dBm 4 Adjust the data eye position do not exceed 100 nsec until one of the X transition crossings is in the center of the display 5 Select jitter measurement from the Measure Eye menu 6 I...

Страница 78: ...m Total RMS jitter at 2 5 Gbps 14 2 ps max 10 Change the clock frequency to 1 0 GHz Measure the jitter again as above at wavelength 1310 nm Total RMS jitter at 1 0 Gbps 21 4 ps max at wavelength 1550 nm Total RMS jitter at 1 0 Gbps 21 4 ps max 11 Change the clock frequency to 622 MHz Measure the jitter again as above at wavelength 1310 nm Total RMS jitter at 622 Mbps 33 0 ps max at wavelength 1550...

Страница 79: ...avelength 1310 nm Total RMS jitter at 155 Mbps 129 ps max at wavelength 1550 nm Total RMS jitter at 155 Mbps 129 ps max 13 Change the clock frequency to 50 0 MHz Measure the jitter again as above at wavelength 1310 nm Total RMS jitter at 50 Mbps 400 ps max at wavelength 1550 nm Total RMS jitter at 50 Mbps 400 ps max 4 25 ...

Страница 80: ...Servicing the HP 83447A Performance Tests Test 4 Trigger port electrical return loss Test Setup Figure 4 5 Electrical return loss test setup 4 26 ...

Страница 81: ...ern Clock input termination 02V Laser transmitter Clean the optical connectors and the FC adapter Mode analog Bias cal mode Optical attenuator Clean the optical connectors Calibrate to read actual power Charge fully or use with an AC adapter Power out 015 dBm HP 83447A Do not connect the network analyzer cable to the HP 83447A Clean the optical connectors Optical input 015 dBm Network analyzer Sta...

Страница 82: ...alibrate Terminations kit calibrate the network analyzer for 1 port re ection measurements at the end of the analyzer cable 3 Make sure averaging is on 4 Attach the network analyzer cable to the Trigger Output 5 Restart averaging and read the return loss gures at 1 2 and 2 5 GHz markers 1 2 and 3 Trigger output 1 GHz R L 10 07 dB min Trigger output 2 GHz R L 10 07 dB min Trigger output 2 5 GHz R L...

Страница 83: ...cord HRL Diamond HMS 10 HP 1 each Procedure Make sure that the test equipment has warmed up before proceeding 1 Before mating carefully clean all connectors Refer to Cleaning Connections for Accurate Measurements in Chapter 2 2 To calibrate the return loss module a Connect the OPTICAL OUTPUT of the HP 8155SM to the OPTICAL INPUT of the HP 81534A using a Diamond ber patchcord b Make sure the source...

Страница 84: ...ersion Reference h Remove the HP 81000BR from the test setup and terminate the ber for no re ections This may be done by wrapping the ber around the shaft of a 5 mm diameter rod ve times i Set Param REF AUX T is displayed on the left j Measure the reference absorption Dispersion Reference 3 Connect the output ber of the HP 81534A to the OPTICAL INPUT Measure the optical return loss 4 30 ...

Страница 85: ...cement procedures for the following assemblies RF cable and RF connector AC cable assembly Power supply Photodetector assembly C A U T I O N This instrument contains static sensitive components Read the electrostatic discharge information in Chapter 1 before removing any assemblies 4 31 ...

Страница 86: ...i ed torque only If a torque measuring tool is not available make semirigid cable connections nger tight only Do not overtighten N O T E Replacing the RF cable or the RF connector may cause the trigger receiver to no longer meet the speci cations and characteristics Refer to Table 1 1 The RF cable and RF connector must be replaced carefully to minimize the risk of the trigger receiver failing spec...

Страница 87: ...of the line module the line switch and the cable harness When replacing the ac cable assembly unsolder the connections to the dc power supply Remove the line module Remove the line switch Refer to Figure 4 6 and Table 4 8 when installing a new ac cable assembly Figure 4 6 Wiring diagram for the line module 4 33 ...

Страница 88: ...Cable Color 1 ac power harness White brown gray 2 ac power harness Gray 3 dc power supply labeled 5 White 4 dc power supply labeled 4 Yellow 5 dc power supply labeled 3 Orange 6 dc power supply labeled 2 Red 7 dc power supply labeled 1 Blue 8 ac power harness White gray red 9 ac power harness White gray 10 Terminal solder lug bottom of rear panel 4 34 ...

Страница 89: ...is Refer to Table 4 1 Figure 4 7 Table 4 9 and Table 4 8 when installing a new power supply Adjust the 5 2 V and 12 V power supplies to the proper voltages listed in Figure 4 7 Figure 4 7 Wiring diagram for the power supply terminals Table 4 9 DC Power Supply Terminal Connections Index Number Cable Attachment Cable Color 1 E2 OUT black 2 E2 0OUT violet 3 E1 OUT red 4 E1 COM black 4 35 ...

Страница 90: ...pler deck Lift the optical coupler deck out of the unit 4 Remove the cable assemblies from connector P1 on the photodetector assembly 5 Use the Huber Suhner connector tool refer to Table 4 1 to remove the coax cable assembly from the photodetector assembly C A U T I O N These connectors are small and delicate Failure to use the Huber Suhner connector tool can result in concealed damage that will c...

Страница 91: ...ewlett Packard part number Description of the assembly Part ordering information To order an assembly or mechanical part listed in this chapter quote the Hewlett Packard part number and indicate the quantity required To order a part that is not listed include the following information with the order Lightwave receiver model number Lightwave receiver serial number Description of where the part is l...

Страница 92: ...local HP o ce Direct phone order system Within the USA a phone order system is available for regular and hotline replacement parts service A toll free phone number is available and Mastercard and Visa are accepted Regular orders The toll free phone number 800 227 8164 is available Monday through Friday 6 am to 5 pm Paci c time Regular orders have a 4 day delivery time Hotline orders Hotline servic...

Страница 93: ...Servicing the HP 83447A Replaceable parts Figure 4 8 HP 83447A assembly level replaceable parts 4 39 ...

Страница 94: ... 8803 TRIM TOP 12 834757 CDR CABLE RF 13 834460A CDR DC CABLE ASSEMBLY 14 0950 2099 POWER SUPPLY 15 11982 60002 AC CABLE ASSEMBLY INCLUDES THE LINE SWITCH AND LINE MODULE 16 OCPL834762 CDR OPTICAL COUPLER TERMINATED 17 834720 CDR PD AMP ASSY 834721 CDR PD AMP ASSY EXCHANGE 18 834756 CDR LED WIRE HARNESS 5041 8801 FOOT BOTTOM FRONT NOT SHOWN 1460 1345 TILT STANDS FOR FRONT FEET NOT SHOWN 5041 8822 ...

Страница 95: ...Servicing the HP 83447A Replaceable parts Figure 4 9 HP 83447A replaceable hardware 4 41 ...

Страница 96: ... 0515 0337 SCREW MACH M3 5 X 10MM PAN HD 4 0515 1400 SCREW MACH M3 5 X 8MM FLAT HD 5 0380 0019 STANDOFFS 6 0535 0082 HEX NUT WITH LOCK WASHER 7 MM 7 2190 0016 LOCK WASHER 8 2950 0001 HEX NUT 3 8 X 32 9 2200 0166 SCREW MACH 4 40 X 5 16 FLAT HD 10 83410 20003 OPTICAL ADAPTER BEZEL 11 2260 0009 4 40 NUT WITH LOCK WASHER 12 1400 0249 CABLE CLAMP 13 0610 0001 2 56 HEX NUT 14 2190 0014 2 LOCK WASHER 4 4...

Страница 97: ...Index ...

Страница 98: ... assistance vii avalanche photodetector diode APD 4 7 B bias adjustment detector 4 20 C cabinet cleaning 2 2 certi cation vii characteristics for the HP 83447A 1 8 10 checking the fuse 2 5 cleaning adapters 2 22 cabinet 2 2 non lensed connectors 2 21 cleaning ber optic connections 2 19 2 21 con dence check performing 2 12 connecting to digital communications analyzer 2 10 connector care 2 19 conne...

Страница 99: ...ng connections 2 19 inspecting 2 20 ber optics handbook 1 4 front panel connector interface 1 4 features 1 6 optical input connector 1 9 output connector 1 9 fuse holder door 2 4 H high input limit adjustment 4 22 hotline orders 4 38 HP maintenance contract 2 13 HP Sales and Service O ces 2 16 humidity 1 9 I index matching compounds 2 19 initial inspection 2 3 input connector 2 19 input limit adju...

Страница 100: ...4 29 through path optical insertion loss 4 13 trigger output amplitude 4 15 trigger output RMS jitter 4 23 trigger port electrical return loss 4 26 photodetector assembly 4 7 replacing 4 36 photodetector assembly adjustment 4 11 pollution degree 1 9 power cable 2 6 power requirements 1 9 2 6 power source connection 2 6 power supply adjustment 4 9 service 4 35 R rear panel voltage selector 2 4 regu...

Страница 101: ...ng preparation 2 15 SONET SDH 1 3 speci cations for the HP 83447A 1 8 10 static safe accessories 1 14 T temperature range 1 9 testing responsivity 2 12 through path optical insertion loss 4 13 torque requirements 4 32 trigger out connector 1 6 trigger output amplitude 4 15 trigger output RMS jitter 4 23 trigger port electrical return loss 4 26 troubleshooting 4 5 servicing 4 8 turning on the light...

Страница 102: ...W warranty 2 13 warranty information viii waveform test measuring eye diagram 3 3 Index 6 ...

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