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Agilent Technologies 8922S Specifications

1. 10 12 9 7 Table 9 4 Replacing a Part Replaceable Parts Replaceable Parts Item 15 16 17 18 18 18 19 20 20 21 A22 44 A23 A23 A23 A23 A23 A23 A24 A24 A24 A24 A24 A24 25 26 27 Agilent Part Number 08922 61019 08922 61004 08922 61013 08922 61045 08922 61845 08922 69845 08920 60331 08920 60224 08920 60192 08922 60259 08920 61005 08922 00096 08922 61001 08922 61801 08922 69001 08922 61133 08922 61897 08922 69097 08920 61010 08920 61810 08920 69010 High Power Attn for 08922 61101 08922 61808 08922 69101 Low Power Attn for 08922 61010 08922 61013 08922 61006 D 6 Dn N FR DN RO Qty Description ee ee ee ee MOD PCB REF SECTION
2. E 58 gg be 5 2 r9 Sa 588 g 55 5 E BER 8 50 2 2 z ok 8 8 225285 P Ribbon Cable Cable 5 Bg oz z 7 acto gt gt E 2 a lt Cable that goes to the rear panel is W47 and the cable going to J6 on the Controller Board w48 A35 PROTOCOL INTERFACE A35 B REFERENCE HP 89228 ONLY w38 yi TEM W45 wai w40 was wa7 T 11 RECEIVER Wie rj MIXER wee W36 n w28 77 7 i weg GPIO W43 was wig Wis wi2 wiz gt Wis w33 7 W34 DA FROM INPUT SECTION 12 MOTHERBOARD PULSE A22W1 ATTENUATOR FROM CRT TO Wag MOTHERBOARD wi ws2 7 W31 To Speaker A24 LOW HIGH POWER ATTENUATOR w23 W4 INPUT SECTION EzuxzrOotzzzxaoazu 354852222582 GE 85 a9 gE Safes amp Sz 9 16 BTRIG W42 Ribbon Cable Coax Cable Cable that goes to the rear panel is W47 and the cable going to J5 on the Controller Board W48 PROTOCOL INTERFACE Replacing a Part Replaceable Parts OPT 001 REF OUT W27 10 MHz OUT W19 13 MHz OUT W22 SYSTEM BUS W37
3. m 6 9 e 5 5 NW gt Nx ede HE 9e SAKLK 6 ome AANA 8 o p 2 Y g Y 35 4 X Lu 2 2 NA E e e lo rior nipote 8 23 this procedure Assembly and Disassembly Procedures Transformer Removal Transformer Removal Done with top and bottom covers removed 1 Do steps 1 through 8 of the A28 Power Supply Removal instructions 2 Disconnect cables and remove transformer using illustration below Tools Required e TX I5 screw driver e 2 pt Pozidriv e Soldering equipment e TX 10 screwdriver 2 4 places Line Module unsoldered before removing 8 24 Replacing Part 9 1 9 1 Replacing a Part Introduction Introduction To order parts contact your local Agilent Technologies Sales and Service office Assembly Replacements For most parts you can either order a new assembly or an exchange assembly Exchange assemblies are factory repaired inspected and tested If you order an exchange assembly you must return the def
4. 5 15 T J 1915 o I A20 2 S4 16 1 18 17 19 14 2 Y to A2 4 5 AB 9 8 7 A33 A34 A G A31 A37 A36 8 5 Assembly and Disassembly Procedures AF Digital and RF Assemblies Removal This can only be done once the top cover and inside protective covers have been removed RELEASE LEVERS Before pulling ring the 8 Memory Board loosen the securing screw oi Use TX 10 Torx head screwdriver to loosen 8 6 Assembly and Disassembly Procedures 1 Front Panel Removal 1 Front Panel Removal 9 A m 9 9 Done with top bottom and inside protective covers removed Removing Modules Remove RF cover Remove RF modules Disconnecting Cables Disconnect RF cable on mixer assembly 1 4 inch SMA connector Disconnect cable from connector J77 on motherboard Disconnect top cable from pulse switch Disconnect cable from connector J6 on motherboard Disconnect cable from connector J5 on motherboard Disconnect ribbon cable from front panel Detaching Front Panel Remove TX 15 top CRT mounting screw 10 Remove 2 TX 15 side CRT mounting screws 11 Remove 8 TX 10 front panel mounting screws both sides Steps 12 and 13 are necessary only when complete removal of the front panel is desired Most repairs ca
5. Trouble Shooting The Controller Display Chapter 5 Trouble Shooting The Power Supply Chapter 6 Running Diagnostics Chapter 2 Localizing the Problem Flow Chart 1 3 1 2 Localizing the Problem Power Up Checks Power Up Checks The following checks show whether the instrument is powering up correctly a Depress the power button on the front panel see diagram b Check that the fan on the rear panel is working c Listen for a single beep after pressing the power switch This can be from 6 to 20 seconds depending on model type d Check the display on the front panel for any error messages The normal message which will appear is All host processor self tests passed and or Frequency Reference Cal lost Perform Reference Calibration b N Rear Panel Vent Power Up Checks Agilent 8922x If an error message appears after power it may not be the only message which has appeared Only the last message will be shown on this message line Press SHIFT MSG to access the message screen for a list of all the error messages Table 1 1 If Power Up Checks FAILED Localizing the Problem If Power Up Checks FAILED If the power up checks failed continue with this section If the fan did not start see Troubleshooting t
6. HP IB Adrs 22 O PRESET The instrument is now set up as an HP Agilent 8922G or HP Agilent 8922E and ready for Performance Verification testing Forward Conversion To return the instrument from an HP Agilent 8922G back to an HP Agilent 8922H M or an HP Agilent 8922E to an HP Agilent 8922F S select the following keys 1 More this is accessible from the Cell Control screen in the bottom right hand corner Scroll down the list and select CONFIG 1 Compatible select HP 8922H M or HP 8922F S HP IB Adrs 14 O PRESET The instrument is returned to an HP Agilent 8922H M or HP Agilent 8922F S Verifying Performance Using the Compatibility Switch for the HP Agilent 8922F H or M S To Configure the GPIB Addresses 1 With the program loaded type EDIT DEFAULT ADDRESS press ENTER 2 Modify each line to indicate the proper instrument address 700 730 It is now possible to re store the program as PT 8922 or store it under a different name To Run the Program 1 Type RUN press ENTER 2 Follow the directions as they appear on the screen Notes on Running the Program The first screen which appears is the GPIB status of each piece of test equipment that is supported It is only necessary to have the instruments responding that will be used in each particular test Make certain that each instrument you will be using is responding at the proper address Duplicate addresses may make an instrument appear to be re
7. MOD PL5 28480 08922 61036 W9 08922 61034 5 CABLE M BD 159 TO MOD CLK 28480 08922 61034 10 08922 61024 3 CABLE M BD J2 TO AUD INH 28480 08922 61024 Wil 08922 61016 6 FM DEMOD CABLE 28480 08922 61016 12 08922 61018 5 DEMOD DATA CABLE 28480 08922 61018 13 08922 61026 5 CABLE M BD J3 TO AUD INL 28480 08922 61026 14 08922 61017 4 PULSE DEMOD CABLE 28480 08922 61017 15 08922 61020 9 DEMOD CLOCK CABLE 28480 08922 61020 16 08922 61025 4 CABLE M BD J4 TO AUD OUT 28480 08922 61025 17 08922 61022 1 MONITOR CABLE 28480 08922 61022 18 08922 61021 0 DEMOD VALID CABLE 28480 08922 61021 19 08922 61015 2 CABLE M BD 161 TO 10M OUT 28480 08922 61015 20 08922 61032 3 CABLE M BD 185 TO AM IN 28480 08922 61032 21 08922 61008 3 CABLE M BD J63 TO E LO OUT 28480 08922 61008 22 08922 61014 1 CABLE M BD 162 TO 13M OUT 28480 08922 61014 W23 08922 61031 2 CABLE M BD 178 TO MONITOR 28480 08922 61031 W24 08922 61009 4 CABLE M BD J60 TO REF IN 28480 08922 61009 W25 08922 61029 8 CABLE M BD J68 TO AUX IF 28480 08922 61029 W26 08922 61030 1 CABLE M BD 164 TO VIDEO 28480 08922 61030 W27 08922 61056 1 CABLE SMC TO BNC OPT 001 28480 08922 61056 W28 08922 61057 2 CABLE SMC TO BNC 28480 08922 61057 W29 08922 61059 4 CABLE SMC TO SMC 28480 08922 61059 30 08922 61058 3 CABLE SMC TO SMC 8 28480 08922 61058 31 08922 61037 8 SPEAKER HARNESS ASSY 28480 08922 61037 W32 08922 61061 8 RIBBON CBL 26 CONDUCTOR 28480 08922 61061 W33 08922 61055 0 RIBBON
8. Line Name INTHIGH Pin Number J6 1 Description CRT intensity reference high Up to 100 V with respect to INTLOW Floating with respect to ground From the A22 CRT to bias the intensity drive circuit at the A20 CRT Drive INTW INTLOW HSYNC J6 2 J6 3 J6 4 CRT intensity control voltage Up to 100 V with respect to INTLOW Floating with respect to ground From the A20 CRT Drive to the A22 CRT to vary the intensity of the display CRT intensity reference low Floats with respect to ground From the A22 CRT to the low side of the intensity drive circuit at the A20 CRT Drive Horizontal sync pulse for the A22 CRT A TTL pulse at approximately 19 kHz From the A20 CRT Drive to A22 CRT The HP A gilent 8922F H M S use a 15 kHz PAL signal 12CRT VID VSYNC J6 5 J6 6 J6 7 Filtered 12AUX for the A22 CRT There is a 20 kHz low pass filter on the A29 Motherboard to filter the 12AUX for the A22 CRT Video signal for the A22 CRT A TTL signal to turn the signals off and on The rate is approximately 6 25 MHz From the A20 CRT Drive to the A20 CRT Vertical sync pulse for the A22 CRT A TTL signal from the A20 CRT Drive to the A22 CRT at a rate of approximately 60 Hz GND J6 8 Table 5 1 Troubleshooting the Controller Display Keyboard Keyboard The Al Keyboard assembly contains both the keys and the knob The keyboard is configured in a matrix with
9. RECEIVER Order 08922 61804 STEP LOOP B MOD SPECTRUM ANALYZER Order Replacement Below SPECTRUM ANALYZER Replacement New SPECTRUM ANALYZER Replacement Exchange MEASUREMENT BD Order 08920 61836 CRT DRIVER New A B E G Only CRT DRIVER New F H M S Only GPIB INTERFACE DISPLAY Assembly CRT SHIELD INPUT SECTION Order Replacement Below A B E G F H INPUT SECTION Replacement New A B E G E H INPUT SECTION Replacement Exchange A B E G F H INPUT SECTION Order Replacement Below M S INPUT SECTION Replacement New M S INPUT SECTION Exchange 5 HIGH POWER ATTENUATOR Order Replacement Below HIGH POWER ATTENUATOR Replacement New HIGH POWER ATTENUATOR Replacement Exchange A B E G G option R10 G option R11 8dB LOW POWER ATTENUATOR Order Replacement Below 8dB LOW POWER ATTENUATOR Replacement New 8dB LOW POWER ATTENUATOR Replacement Exchange option R71 option R73 option R72 option R74 SUM LOOP Refer to ADJUSTMENT Chapter 7 STEP LOOP A Refer to ADJUSTMENT Chapter 7 DAC UPCONVERTER Mfr Code 28480 28480 28480 28480 28480 28480 28480 28480 28480 28480 28480 28480 28480 28480 28480 28480 28480 28480 28480 Mfr Part Number 08922 61019 08922 61013 08922 61845 08922 69845 08922 61859 08920 61005 08922 00096 08922 61801 08922 69001 08922 61801 08922 61801 08920 61810 08920 69010
10. 0 105 24 25 0515 2126 8 2 5 3 065 83 86 104 107 0515 1331 5 8 SCREWM4X6 87 90 0515 1860 5 4 SCREW 1 5FM3 5TX 268 270 0515 1955 3 4 SCREWM3X 5 560 0515 0380 2 1 SMM4 0 10SEMPNTX 83 84 87 88 560 268 269 270 113 Mfr Code Mfr Part Number 00000 00000 00000 00000 00000 00000 ORDER BY DESCRIPTION ORDER BY DESCRIPTION ORDER BY DESCRIPTION ORDER BY DESCRIPTION ORDER BY DESCRIPTION ORDER BY DESCRIPTION 106 107 85 86 89 90 Bracket Screws can be replaced by ordering part 0515 1860 9 24 112 24 25 22 23 104 105 Table 9 12 Replaceable Parts Item Agilent Part Number 79 82 108 111 0515 1331 203 204 0515 0380 561 0515 0380 108 109 CD Qty Description SCREW M4 X 6 00000 5 4 0 IOSEMPNTX 00000 5 4 0 1OSEMPNTX 00000 Replacing a Part Replaceable Parts Mfr Code Mfr Part Number ORDER BY DESCRIPTION ORDER BY DESCRIPTION ORDER BY DESCRIPTION 81 82 110 111 203 204 79 80 9 25 9 13 Replacing a Part Replaceable Parts Replaceable Parts Item Agilent Part Number 209 08922 00005 209 211 212 213 221 222 230 231 237 239 243 245 246 247 249 4 61 62 82 82 83 485 86 488 89 541 9 26
11. Reference This test checks the A15 Reference Section assembly 10 MHz Lock Detector State The 10 MHz VCO is measured using the counter however the counter uses the reference so the measurement is an indication that the counter is working This verifies that both the reference and the count signal are reaching the counter 1 GHz Oscillator Lock Detector State The 1 GHz VCO lock detector is checked for lock 1 GHz and 500 MHz Level Detectors The 1 GHz and 500 MHz level detectors are checked to test for signals from these outputs 10 Fine and Coarse DACs State The 10 MHz VCO is checked for locks at both ends of the tune DAC range NSM and Pre Modulation Filter This test checks the A5 Premod Filter and NSM assembly NSM Clock Detector State The presence of a clock is checked Pre Modulation Filter Clock Detector State The Premod filter clock is checked for lock with both a clock present and not present The front panel AUDIO OUT is used as a test clock It is connected to the front panel MODULATION CLOCK input DAC and Up Converter This test checks the A27 DAC Upconverter assembly Detector Output Level This test checks for an output at several frequencies using the voltmeter at the AUX4_VM output 15 5 Diagnostics Theory RF_DIAGS RF Generator Step Loop This test checks the A26 Step Loop A assembly RF Generator Loop 1 MHz Reference Detector This test checks for the presence of a reference RF Gener
12. This feature is not used by Dutnut Heading the diagnostic program Test Function Edit Sean Specifies whether to print diagnostic test results These options are used for controlling various parts of the tests These options can be changed depending on the test program They are selected by using the cursor and knob Where to Go Next If any high probability failures occurred those assemblies can be replaced and the test re run When the tests pass the performance tests can be run to verify performance refer to Chapter 3 If low probability failures occur the performance tests can be run for further indication or measurements can be made to individual assemblies using Chapters 4 12 and 13 Running Diagnostics Loading and Running the Ram Test Loading and Running the Ram Test Your HP Agilent 8922B comes with software to test the Data Buffer Loading the RAM Test 1 Locate the floppy disk labeled 08922 10001 8922B Driver 2 Insert the disk into the drive 3 A substitute your drive specifier for A if your drive is not drive A and press CENTER 4 Type LOAD DRIVER22B 1 and press CENTER The Data Buffer Driver will now be loaded and will begin to run 5 Press 6 Use the cursor to select the output device 7 Select the area of RAM to test and Press C Ko Accept 8 Repeat selection for each area of RAM Where to go next If any of the RAM areas tested bad go t
13. 14 17 GSM Phase 2 17 4 GSM RTI Assembly theory 14 17 GSM Timing Service Kit 4 5 GSM900 17 4 H High Power Attenuator theory 14 4 14 13 Hop Controller specs 12 59 theory 14 18 troubleshooting 5 2 Hop controller Service Kit 4 5 HP Agilent 83201A Service Kit 4 1 HP Agilent 8922B diagnostics 2 7 theory 14 15 HP Agilent 8922G theory 14 17 HP Agilent 8922M Memory Upgrade 9 29 HP Agilent 8922S Memory Upgrade 9 29 I IF Bandwidth theory 15 9 IF Counter Test theory 15 10 Input theory 14 4 14 13 Input A B E F G H specs 12 43 Input M S Index 3 Index specs 12 47 Input Section theory 15 7 Instrument Block Diagrams 13 2 K Keyboard troubleshooting 5 2 5 6 L line cord 6 3 Line Fuse 6 5 line module 6 5 Line Voltage 6 5 Loop B Output Detector theory 15 9 M Measurement Service Kit 4 5 specs 12 38 theory 14 18 Memory Service Kit 4 5 memory card 8 2 diagnostics 2 1 Modulation Distribution Service Kit 4 5 specs 12 8 theory 14 14 Modulation Distribution External Paths theory 15 3 Modulation Distribution Internal Paths theory 15 3 Module I O Specs 12 2 MS_DIAGS theory 15 11 N NSM theory 14 10 NSM and Pre Modulation Filter theory 15 5 NSM Clock Detector State theory 15 5 Index 4 Open Loop ALC Drive theory 15 7 Option 001 7 4 theory 14 9 Option 003 theory 14 17 oscillator 14 9 oscilloscope theory
14. CONTROLLER DCU H Order 08922 61812 CONTROLLER DCU S Order 08922 61813 CONTROLLER DCU M Order 08922 61814 Order this BOOT ROM with above DCU M only Mfr Code 28480 28480 Mfr Part Number 08920 60209 08922 60105 Note New HOST Firmware must be downloaded to the Agilent 8922M DCU Assembly by an external controller Contact your local Agilent Technologies Sales and Service Office for more information 8 8 8 8 8 8 8 9 10 12 13 14 08922 60156 08922 60163 08922 60158 08922 60165 08922 60166 08920 60279 08922 60175 08922 60121 08920 60256 08922 61007 08922 61044 08920 61031 08922 61023 N N ND N oN t2 ee ee ee 8922A B MEMORY Order 08922 60175 8922E MEMORY Order 08922 60175 8922G MEMORY Order 08922 60175 8922F MEMORY Order 08922 60175 8922H MEMORY Order 08922 60279 8922H S M MEMORY Without EPROM s 8922A E F G MEMORY BOARD Without EPROM s GLOBAL TEST DEMOD BOARD 5 POWER SUPPLY REGULATOR Order 08920 61856 RECEIVER MIXER Order 08922 61807 PULSE ATTENUATOR Order 08922 61844 OUTPUT Order 08920 61831 GSM TIMING GEN PULSE DRIVER 28480 28480 28480 28480 28480 28480 28480 28480 08922 60163 08922 60158 08922 60165 08922 60166 08922 60175 08922 60121 08922 61023 Replacing a Part Replaceable Parts
15. NSM J21 25 23 26 Amplitude TTL Levels Clock Rate 1 MHz bursted Slow Busses Clock Data and Enable RECEIVER J21 41 39 34 OUTPUT SECTION J21 41 39 28 Clock and data shared with Revr REFERENCE SECTION J21 31 33 32 SPECTRUM ANALYZER J21 31 33 38 Clk amp data shared with ref MODULATION DISTRIBUTION J21 53 54 52 AUDIO 1 J21 53 54 49 AUDIO 2 J21 53 54 50 INPUT SECTION J21 53 54 51 Clk amp data shared between MOD AUD1 AUD2 INPUT2 Amplitude TTL Levels Clock Rate Approximately 180 kHz bursted 12 62 13 Instrument Block Diagrams 13 1 Instrument Block Diagrams Introduction Introduction This chapter contains the block diagrams for the HP Agilent 8922A B E F G H M S Additional information for troubleshooting to the block diagram level can be found in the following chapters Chapter 4 Using the Service Kit explains how to use the HP Agilent 83210A Service Kit to extend the modules and make signal measurements Chapter 5 Troubleshooting the Controller Display gives procedures for troubleshooting display problems or problems with the HP Agilent 8922 Controllers Chapter 6 Troubleshooting the Power Supply contains information about the power supply and regulator circuits as well as test points and power distribution Chapter 12 Module I O Specs contains detailed descriptions of the input and output signal characteristics for most RF and Audio modules
16. Sine Signal Level 2 10 dBm Harmonics 25 dBc Spurious at 25 kHz offsets 70 dBc Amplitude 1 2 V ans 3 75 Vp p 12 29 Module I O Specifications A15 Reference 5 Premodulation Filter and NSM 10 J3 17 Frequency 10 MHz 50 Hz Waveshape Sine Signal Level gt 10 dBm Harmonics lt 25 dBc Spurious at gt 5 kHz offsets lt 70 dBc For measurement procedure and waveform refer to A5 Premodulation Filter and NSM page 12 10 To A9 Global Test and Demod Assembly To A13 Output 20M REF A J3 20 Frequency 20 MHz 20 Hz Requires 1 ppm reference in Waveshape Sine Signal Level 245 dBm Harmonics 25 dBc Subharmonics 30 dBc Spurious at 25 kHz offsets lt 70 dBc Refer to A9 Global Test and Demod page 12 15 for measurement procedure and waveform OUT 1G REF J1 3 Frequency 1 GHz 5kHz Waveshape Signal Level 1 dBm 2 dB Harmonics lt 25 dBc Phase Noise At 20 kHz offset Spurious at gt 5 kHz offsets 500 MHz to 1500 MHz lt 105 dBc 12 30 Module I O Specifications A15 Reference OUT_1G_REF is only present for RF Generator settings up to 291 MHz Used for frequency translation Refer to A13 Output page 12 22 for readings 16 Receiver Assembly 500M_REF J1 17 Frequency 500 MHz 2 5 kHz Waveshape Sine Signal Level 0 dBm 2 dB Harmonics lt 25 dBc Spurious at gt 5 k
17. assembly Using the AFG1 output of the A6 Signaling Source Analyzer assembly through the A4 Modulation Distribution assembly the 12 internal paths of the A3 Audio Analyzer are checked Two of the paths are not used in the HP Agilent 8922 and will be shown as No optional high low pass filter sensed Ignore this error message on this test Paths 1 through 4 are routed directly to the voltmeter through the AUD1_VM output while paths 5 through 12 are routed to the peak detector in the A2 Audio Analyzer 2 assembly before being routed to the voltmeter through the AUD2 VM output The gain and coupling are varied and each path is checked Audio Analyzer 1 External Paths This test checks the A3 Audio Analyzer 1 assembly The front panel AUDIO IN path is selected and de selected while using an external connection from the front panel AUDIO OUT connector which uses the AFGI output from the A6 Signaling Source Analyzer routed through the A4 Modulation Distribution assembly The signal is routed to the voltmeter through the AUD1_VM output Audio Analyzer 2 This test checks the A2 Audio Analyzer 2 assembly Using the AFG1 output from the A6 Signaling Source Analyzer assembly routed through the A4 Modulation Distribution assembly to the MOD MON output the 14 paths through the A2 Audio Analyzer 2 are checked Each of the measurements go directly to the voltmeter through the AUD2 VM output 15 4 Diagnostics Theory RF_DIAGS RF_DIAGS
18. e Adjustments required after assemblies are replaced Assembly and Disassembly Procedures Top and Bottom Cover Removal Top and Bottom Cover Removal Remove four 2 pt Pozidriv top bumper mounting screws Remove four 2 pt Pozidriv side mounting screws and bumpers Remove four 2 pt Pozidriv screws and standoffs Remove fourteen TX 10 screws and top cover Remove two TX 10 screws and bottom foot eU Re Remove two TX 15 screws and bottom cover Tools Required e TX 15 screw driver e TX 10 screw driver e 2 pt Pozidriv screw driver SIDE VIEW Both Sides Both Sides To remove covers pull sides aam slightly apart slide them back a few inches lift off Mu i t Both Sides Assembly and Disassembly Procedures Inside Protective Covers Inside Protective Covers All covers can be removed with a TX 15 screw driver Screws shown circled only require loosening 492 Top Cover B E and G 505 Bottom Plate B E and G 252 240 GPIB Mounting Bracket and 241 242 Screws 244 458 Opt 001 114 Regular Mounting Bracket and 115 118 Screws Not Shown 12 CRT Bracket 426 8 4 Assembly and Disassembly Procedures AF Digital and RF Assemblies Removal AF Digital and RF Assemblies Removal NN 27 28 T TI 25 j li o A13
19. gt 20 dBm or using the AUX RF IN connector for lower power input signals The input signal on the front panel RF IN OUT connector is first sent to the A24 High Power Attenuator This attenuates the signal by approximately 14 dB 8 dB on HP Agilent 8922KH M S where it can be directly used by the A23 Input assembly The A23 Input assembly has an RF power detector that converts the power on the RF IN OUT connector to a dc voltage This dc signal is sent to the 19 Measurement assembly where it is measured These dc signals are sent to the A19 Measurement assembly using the det lo and det hi inputs to the A19 Measurement assembly The det lo signal is lower sensitivity for the highest power signals and det hi is high sensitivity for lower power signals Accurate RF power measurement can only be made using the RF IN OUT connector on the HP Agilent 8922 These circuits are used to measure both CW and Pulsed RF power For accurate RF power measurements it is necessary to zero the power meter and enter the frequency of the RF input signal These two functions will cause the power meter to use the proper correction factors to compensate for temperature changes and frequency losses After the power detector the RF IN OUT connector is routed to a power splitter and then an RF switch This switch selects between the RF IN OUT signal or the AUX RF IN signal Selectable input attenuators in the A23 Input assembly are switched in and out manuall
20. to convert the analog speech to and from the GSM format This assembly also provides many of the real time channel processing functions that keeps the HP Agilent 8922G synchronized with the mobile radio Overall control of the A31 CODEC A32 GSM Controller and A34 GSM RTI assemblies is provided by the A32 GSM Controller assembly This A32 assembly interfaces with the main controller A7 for communication with the remainder of the instrument The A32 GSM Controller assembly also communicates with the Option 003 A35 Protocol Interface assembly The A34 GSM RTI Real Time Interface assembly provides the logic and switches to interface the data clock and synchronization signals into the analog RF generator and RF analyzer hardware This assembly replaces a jumper board A34 in the HP Agilent 8922A instrument which allows it to access external signals from the front and rear panel as well as provide key signals to the A33 Hop Controller assembly and A5 Premod Filter NSM assembly A35 Protocol Interface HP Agilent 8922F HM S Option 003 Only This assembly buffers the digital signal from the A32 GSM Controller assembly to the rear panel where it can be connected to a protocol analyzer This option allows a user to view the messages that are passed over the communication channel between the radio and the HP Agilent 8922F H 14 17 Block Diagram Theory of Operation Block Diagram 5 Block Diagram 5 This block diagram illustrates the bus
21. 0127 PN TX NUT SHMET U 6 32 FUSE 5A 250V F WSHR LK HLCL WSHR LK 3 5ID WSHR LK M4 OID SM 632 562PNPD WSHR FL 156 6 WSHR FL M3 5 ID XFMR PWR100 240V PANEL REAR MCHND WSHR SHLDR INSUL WSHR SHLDR INSUL Mfr Code Mfr Part Number 28480 28480 28480 00000 28480 28480 28480 28480 00000 00000 00000 00000 00000 00000 00000 00000 00000 00000 00000 00000 28480 28480 28480 08922 61043 08645 60132 08645 60133 ORDER BY DESCRIPTION 08645 60134 08645 61115 08645 61122 08922 60141 ORDER BY DESCRIPTION ORDER BY DESCRIPTION ORDER BY DESCRIPTION ORDER BY DESCRIPTION ORDER BY DESCRIPTION ORDER BY DESCRIPTION ORDER BY DESCRIPTION ORDER BY DESCRIPTION ORDER BY DESCRIPTION ORDER BY DESCRIPTION ORDER BY DESCRIPTION ORDER BY DESCRIPTION 08645 21005 08645 21031 08645 21032 Replacing a Part Replaceable Parts ge 2360 0229 0515 1137 2190 0585 2190 0584 N 08645 61115 08645 60134 0590 1794 08645 60133 0515 1851 08645 60132 7 274 Mid 72 4 3050 0892 4 1 3050 0686 _ 08645 00043 0515 1860 T 08645 21031 4 5 lt 08645 21005 t B AN 3050 0686 2190 0586 BT U 08645 21031 wl 0515 1960 7 7 08645 61122 9 11 9 6 Replacing a Part Replaceable Parts Replaceable Parts Item Agilent Part Number D A31 08922 60247 9 A32 08922 60146 8 A32 08922 60162 8 A32 08922 60167 8 A32 08922 60176 8
22. 08922 21001 08922 40002 08922 40003 ORDER BY DESCRIPTION ORDER BY DESCRIPTION ORDER BY DESCRIPTION ORDER BY DESCRIPTION 08922 00056 08922 40001 ORDER BY DESCRIPTION ORDER BY DESCRIPTION ORDER BY DESCRIPTION 08922 00041 08922 00042 08922 00080 08922 00082 08922 00038 08922 00083 08922 00086 08922 00085 ORDER BY DESCRIPTION ORDER BY DESCRIPTION ORDER BY DESCRIPTION ORDER BY DESCRIPTION ORDER BY DESCRIPTION Replacing a Part Replaceable Parts 7 11 A1 Mounting Screws ex 47 35 00000 0000 oo 9990000 cA m a a Hr Trim 548 n OOOO lg 2 paogooncooo os EE lt 54 63 38 43 _ Pomc on 45 46 gt OOOO Ps Dc Oooo i Trim Switch 70 J1 32 33 48 1 2 31 Nutunder Panel Frame volume knob Dress 9 5 Table 9 3 Replacing a Part Replaceable Parts Replaceable Parts Item Agilent Part Number A2 08920 60212 A3 08920 60171 A4 08920 60209 AS 08922 60105 A6 08920 60208 7 08920 60307 7 08920 60395 7 08920 60395 7 08920 60395 7065 08920 87168 CD Qty Description AUDIO ANALYZER 2 Order 08920 61812 AUDIO ANALYZER 1 MODULATION DISTRIBUTION Order 08920 61809 PREMOD FILTER NSM BOARD SIGNAL SOURCE ANALY Order 08920 61849 CONTROLLER DCU A B E F G Order 08922 61811
23. 1000 MHz Output level Uncal OFFSET VOUT LOW 100 mV 50 mV No input Power VOUT LOW 280 mV 50 mV OFFSET 10 dBm 50 MHz VOUT HIGH 53 V LOW 12 44 11 Receiver Mixer Module I O Specifications A23 Input HP Agilent 8922A B E F G H Only 1st MIX IN J5 Freq Range 4 to 1000 MHz Output Level Normal 12 dBm to 22 dBm Underrange 22 dBm to 50 dBm Measure using known reference signal refer to A11 Receiver Mixer page 12 19 for procedure 12 45 Module Specifications A23 Input HP Agilent 8922A B E F G H Only To 19 Measurement Assembly AUTO_RNG_DET Output Level IN_VOLT J6 15 Prescaler AGC RF peak detector voltage 4 71 E 5 When AGC has active control AUTO RNG ALC Range TEMP DET Prescaler AGC modulator control voltage 0to 4V Temperature sensor voltage Nominal Output 2 98 1 Volts 25 Deg C Sensivitity 10mV C DUPLEX DET Duplex port RF peak detector Voltage Nominal 100 mV 20 mV 10 dBm Trip Level 400 mV 10 mV with relay closed 785 mV 10 mV with relay opened ANT_DET Antenna port RF peak detector voltage Nominal 100 mV 20 mV 10 dBm Trip Level 400 mV 10 mV FILTER_OUT_DET Receiver Output Port RF peak det Voltage Nominal 10 mV 5 mV 10 dBmOutput DET_HIGH RF Power peak detector high level voltage Output See DET HI LO specs RF Power Detector GND Input Section Analog Ground Nominal
24. 12 Pulse Attenuator assembly The A23 Input assembly has a step attenuator 5 dB step that can attenuate the RF signal up to 125 dB The A23 Input assembly also contains a switch to select the proper output port For high output levels the port AUX RF OUT is available For most operations the RF signal is routed to the RF IN OUT port and connected directly to a radio or transmitter The radios are duplex meaning they simultaneously transmit and receive at different frequencies The most common setup is to have the HP Agilent 8922 Signal Generator routed to the RF IN OUT connector to simulate a base station and is transmitting to the radio under test At the same time the radio under test is transmitting to the HP Agilent 8922 Signal Analyzer at a frequency offset by 45 MHz This signal comes in the HP Agilent 8922 RF IN OUT connector and is routed to the Signal Analyzer section The 14 dB 8 dB with the HP Agilent 8922F H M S A24 High Power Attenuator assembly is shown on Block Diagram 1 inside the A23 Input block It is actually external to the Input Module and provides 14 dB attenuation of all signals going into or coming out of the RF IN OUT connector on the front panel Diagnostic procedures individually check that all the step attenuator switches provide attenuation although the accuracy of this measurement is limited A connectivity check is provided with the diagnostics to verify the connections going into and out of the A23 Inpu
25. Chapter 2 Running Diagnostics and run the tests relating to the AF Analyzer 1 16 Running Diagnostics 2 1 Running Diagnostics Introduction Introduction There are two types of diagnostics for the HP Agilent 8922 diagnostic tests and the HP Agilent 8922B specific RAM Test The latter is appropriate for the HP Agilent 8922B only The diagnostic tests are contained either on the memory card part number 08922 10003 or in ROM memory for instruments with firmware revision code A 03 00 and above The HP Agilent 8922B specific RAM Test is contained on the 08922 10001 8922B Driver disk supplied with the HP Agilent 8922B Most of the diagnostic tests relate to a fault in a specific instrument section Therefore if chapter 1 identified a specific section of the instrument only those tests need to be run The diagnostic tests whose names begin with E or G are specifically for the HP Agilent 8922E G The other tests are for any HP Agilent 8922 This chapter comprises two sections The first section Running Memory Card or RAM Based Diagnostics shows how to load and run the memory card based or ROM based diagnostics The second section Loading and Running the RAM Test shows how to load and run the HP Agilent 8922B RAM test Equipment requirements and installation procedures are given in the HP Agilent 8922B User s Guide Part Number 08922 90020 This chapter uses the diagnostic test names from an early me
26. DC Offset 15 mV Specified input range 29 to5 Vp B W 3 dB 20 Hz to gt 200 kHz Selected input DC Audio Path Step Response 1 lt 400 ms DC Offset 21 mV Uncalibrated DC Offset drift 3mV OverTemperature DC path gain accuracy To Audio Analyzer 2 DC_AUDIO 14 DC Offset Front Panel Input 15 mV Other Inputs 12 7 Module Specifications A4 Modulation Distribution A4 Modulation Distribution Use extender card 08920 60141 Power Supplies 12 V J1 29 120 mA Audio Output Drive 5 J1 33 34 12 mA 12 30 120 mA Audio Output Drive GND Analog J1 27 28 GND Digital 11 35 36 37 Inputs From Front Panel BNC input EXT MOD J1 1 Input Z 600 Q Max Input Level 15 Vp Full Scale Input Vp From A6 Signal Source Analyzer AFGI J1 11 AFG2 J1 13 AFG GND J1 12 Input Z 13 36 k Q GND Input Z 46 7 KQ Full Scale Input 3 5 Vp 1 3 Vims AFG1 and AFG2 are both sine wave signals with the audio frequency set on the RF Generator page the attenuation takes place on the modulation distribution board To obtain a signal for measuring AFG2 select TEST MENU then AF_diags From the AF diags submenu select MODULATION DISTRIBUTION INTERNAL TEST using single step stop on test 1 AFG1 will measure at gt 500 mV ms and gt 1 8 Vp p 12 8 To Front Panel BNC Module I O Specifications A4 Modulation Distribution Outputs AUDIO
27. Digital and RF Assemblies Removal 8 5 1 Front Panel Removal 8 7 A10 Power Supply Regulator Removal 8 9 Receiver Mixer Removal 8 10 A12 Pulse Attenuator Removal 8 12 21 GPIB Interface Removal 8 14 22 Display Removal 8 16 A23 Input Section Removal 8 18 24 Attenuator Removal 8 19 A28 Power Supply Removal 8 20 Fan Removal 8 22 Transformer Removal 8 24 Contents 9 Replacing a Part Introduction 9 2 Replaceable Parts 9 3 Firmware Upgrades 9 29 10 Service Screen Introduction 10 2 11 Self Test Error Messages Introduction 11 2 12 Module I O Specifications Introduction 12 2 A2 Audio Analyzer 2 12 3 Audio Analyzer 1 12 5 4 Modulation Distribution 12 8 A5 Premodulation Filter NSM 12 10 6 Signaling Source Analyzer 12 13 9 Global Test and Demod 12 15 Receiver Mixer 12 19 A13 Output 12 22 14 Pulse Driver 12 24 15 Reference 12 26 16 Receiver 12 32 18 Spectrum Analyzer 12 36 19 Measurement 12 38 A23 Input HP Agilent 8922A B E E G H Only 12 43 A23 Input Agilent 8922M S Only 12 47 25 Sum Loop 12 50 17 A26 Step Loop 12 53 A27 DAC Upconverter 12 56 Contents 3 Contents A28 Power Supply 12 58 A33 Hop Controller 12 59 13 Instrument Block Diagrams Introduction 13 2 14 Block Diagram Theory of Operation Introduction 14 2 Technical Discussion 14 3 Block Diagram 1 14 4 Block Diagram 2 14 9 Block Diagram 3 HP Agilent 8922B Only 14 15 Block Dia
28. MHz Output Level Maximum Output Power 0 25 249 MHz gt 13 dBm 249 500 MHz gt 15 dBm 500 1000 MHz gt 16 dBm Calibrated vernier rng 1 to 8 dBm Normal 0 tp 16 dBm Overrange Minimum Output Lvl Off lt 40 dBm Modulator Rangefor AM Spectral Purity Only contributions of the outputmodule Spurs 65 dBc 5 kHz Offset 5x4 3x2 RF D feed and L O feedthrough Harmonics 36 dBc Ampl lt 1 dBm atten loss atten loss 9 dB worst case 12 23 Module Specifications A14 Pulse Driver A14 Pulse Driver Use extender card 08922 60129 Use coax jumpers on Plug 1 pins 3 13 and 17 Plug 3 pins 3 9 and 17 Power Supplies 15 15 V 12 3 5 V J2 4 Ground J3 1 2 4 8 10 16 18 20 31 1 4 6 12 14 16 18 19 Inputs From A15 Reference Section 1M REF C P3 3 Frequency 1 MHz 5 Hz Levels CMOS Duty Cycle 800 ns high 200 ns low Waveshape Square Wave Not a true square wave Duty Cycle 25 Amplitude 4 4 Vp p Level gt 7dBm Vp p jd m 775 ns 12 24 Module I O Specifications A14 Pulse Driver Outputs To 13 MHz output on Rear Panel 13M_REF_OUT_A P3 17 Waveshape Sine Level gt 7 5 dBm Nominal Output Impedance 500 Amplitude 3 75 Vp p RTI Assembly 13M REF OUT B Waveshape Frequency HP Agilent 8922E G H Harmonics M Only Leve
29. MHz V kHzmV Hz Troubleshooting the Controller Display Keyboard If the pull up voltages are present at the end of the ribbon cable and the voltages are not pulled down when a key is pressed the problem is most likely on the Al Keyboard assembly If the pull up voltages are present and are pulled down when a key is pressed but the controller does not respond the problem is most likely at the A7 Controller assembly The knob can be checked with an oscilloscope at the J4 connector on the A7 Controller When the knob is turned pulses should be present on A7 J4 pins 19 and 21 When the knob is pushed the level at A7 J4 pin 23 should change states The Al Keyboard end of the ribbon cable should also be checked for 5 V on pins 15 and 16 If the signals are getting to the A7 Controller the problem is most likely at the A7 Controller assembly Where to Go Next If either the Al Keyboard or A7 Controller assemblies measured in correctly go to chapters 8 and 9 Troubleshooting the Controller Display Keyboard This Page Intentionally Left Blank 5 8 Troubleshooting the Power Supply 6 1 Troubleshooting the Power Supply Introduction Introduction This chapter helps verify that the power supply is at fault when no indication for power is present upon power up If the power supply appears defective the problem can be localized to the line module mains line fuse transformer power supply regulator motherboard or po
30. MONITOR OUT W23 AMIN W20 REF IN W24 LO OUT W21 LOIN W28 BREF IN W40 BREF OUT W41 VIDEO OUT W26 AUX IF OUT W25 BTRIG W42 GPIO W43 EMMI W46 A35 B REFERENCE HP 8922B ONLY 7 45 W44 A wie wee GPIO W43 EEMI W46 wis 5 wie w33 FROM INPUT SECTION A12 PULSE A22W1 ATTENUATOR a FROM CRT TO MOTHERBOARD wi wa2 24 LOW HIGH POWER ATTENUATOR 23 5 W4 TO INPUT SECTION 2 Ex EzuxarobEzzaxxasu 2 Pee Ere ee ere 2 5944 2066495 68299998828 GEL 2885 28 26925 2 2255 45 gt B 9 17 Table 9 8 Replacing a Part Replaceable Parts Replaceable Parts Item Agilent Part C Qty Description Number D 1 5040 3881 2 1 TOP FLANGE 3 5060 4475 4 2 SIDE FLANGE 6 5001 8663 6 1 INTERNAL LID 9 0515 1114 24 SCREW 4 10 11 0535 0023 2 jl NUT HEX DBL CHAN 522 08645 40015 2 1 FOOT REAR 523 524 0515 1860 2 SCREW 1 5 FM 3 5TX 525 08922 00065 4 1 COVER BOTTOM 537 540 0515 1232 5 4 SCREW MM 3 5 6 8 MM 549 552 5041 8821 24 STNDOFF REAR 554 08922 00066 Ti TOP COVER 5041 8801 8 4 FOOT FULL MOD 569 572 0515 1444 1 4 SCR MACH 3 5 X 60 573 576 08922 40004 5 4 BUMPER 577 580 0515 0419 8 4 5 5 0 16PN P2 581 584 0515 0380 2 4 SMM4 0 I0SEMPNTX 5
31. Module I O Specifications Introduction Introduction This chapter contains tables of module input output specifications These do not include tables for some of the digital boards due to complexity In most cases it will be quicker to verify digital failures using board swap than to verify through measurement This chapter is used with the Using the Service Kit Instrument Block Diagram and Block Diagram Theory chapters to verify a specific module or assembly failure when diagnostics and performance tests do not provide a high level of certainty 12 2 Module I O Specifications A2 Audio Analyzer 2 A2 Audio Analyzer 2 Use extender card 08920 60142 Power Supplies 5 J1 21 22 200 mA 12 V J1 19 12 V J1 20 GND Analog J1 6 7 10 13 14 17 18 GND Digital J1 23 24 25 27 Inputs AUDIO INPUT MUX From A3 Audio Analyzer 1 Selected Input AUD J1 12 Input Z Voltage Range 1 M Q DC Coupled 5 From Modulation Distribution Board Selected Input MOD_MON J1 16 100 kQ DC Coupled DC AUDIO INPUT From Audio Analyzer 1 DC_AUD J1 15 Input Z Voltage range 100 5 0 Vp 12 3 Module Specifications A2 Audio Analyzer 2 Outputs AUDIO OUT MEAS MUX 19 Measurement Board AUD2_VM J1 11 Selected path POS NEG peak detectors Input FILT_AUD Response Time lt 1 ms Rise time DC Offset l
32. OUT HI J1 7 Output Z lt 1 Q Maximum Output Voltage 5 Vins OpenCircuit Max Output Current 40 mA Peak Hardware spec 20 mA peak Spur Requirements Full Scale Gain Uncal 5 953 1 51 LFS 1 2 to FP DAC 255 600 Load Attenuator Accuracy 02 DC 20 40 60 dB The output of AUDIO_OUT_HI can be set on the RF Analyzer page MOD J1 20 AM MOD Ouptut Z lt 400 Q Load 100 kQ 4000 pF Full Scale output 4Vp Uncalibrated Path Gain 2 37 1 5 DAC 255 1 kHz Path Gain Input 5 12 2 5 DAC 255 1 kHz Attenuator Accuracy 0 02 dB 1 kHz 20 dB High Freq roll off 3 dB 150 kHz Low Freq roll off lt 1dB 20 Hz AM port EXT AC Standard AM load To route the input signal AFGI to the output MOD access the SERVICE Screen Select the latch dstr mod destination and change the value to any odd number for example 3 Select dstr_afg1_to_mod and change the value to any even number for example 2 and measure MOD MON J1 18 Output Z lt 1kQ MOD_MON can also be accessed using the SERVICE Screen Use latch dstr_monitor_select 727 signal at un attenuated values of AFGI 3 use external source connected to Modulation AmSpeech 4 signal at levels set up at RF Generator page 12 9 Module Specifications A5 Premodulation Filter and NSM A5 Premodulation Filter and NSM Use extender card 08922 60132 Pow
33. The digital data information is also used by the HP Agilent 8922E F G H to setup and maintain a call with a GSM mobile phone This is done in real time as HP Agilent 8922E F G H and mobile phone simultaneously send and receive from each other A18 Spectrum Aanalyzer The A18 Spectrum Analyzer assembly receives the 114 3 MHz signal from the A16 Receiver assembly The analyzer can only view frequency spans up to 4 MHz due to the bandwidth of this input signal A phase lock loop inside the spectrum analyzer is used to downconvert the 114 3 MHz signal which is then amplified filtered and detected The synchronization signal for the display is controlled by the A19 Measurement assembly This causes the PLL signal to sweep across the frequency span selected In addition to normal spectrum analysis the HP 8922 spectrum analyzer is used to help measure the amplitude profile of the pulsed GSM signal The upper 30 dB of the pulse envelope is accurately determined by the A9 Global Test and Demod assembly however the lower level portions of the pulse amplitude is measured with the wide dynamic range of the A18 Spectrum Analyzer assembly This internal spectrum analyzer is a useful tool to view the incoming RF signal and verify that the A23 Input and A11 Receiver Mixer assemblies are working correctly The A18 Spectrum Analyzer assembly contains diagnostic test points to verify gain attenuation and bandwidth controls Because of the wide dynamic ra
34. Theory RF_DIAGS RF Analyzer Loop 1 MHz Reference Detector This test checks for the presence of the 1 MHz reference RF Analyzer Loop Lock Detector This test checks the loop for lock at several frequencies Loop B Output Detector This test checks the level detector at several frequencies Spectrum Analyzer This test checks the A18 Spectrum Analyzer assembly Detector Output The RF generator is routed externally to the spectrum analyzer through the AUX RF OUT and AUX IN front panel connectors The level is set to a very low level 100 dBm and the spectrum analyzer detector is measured Stepped Gain The stepped gain amplifiers are check using a 0 dB measurement as a reference The steps are then measured one at a time using the detector IF Bandwidth The IF bandwidth is set to all possible values and the voltage is measured by the detector Filter Rejection The LO frequency is set at 10 times the bandwidth away from the center frequency of each filter then the detector is read Variable Gain IF Amplifier The variable IF gain amplifier is checked by turning on one bit of the control DAC at a time starting with the LSB The detector is checked as each bit is turned on RF Input Signal With the internal calibration signal disabled the RF generator and RF analyzer are set to 100 MHz for an IF of 114 3 MHz at the input of the spectrum analyzer The signal is routed internally through the coupler on the RF IN OU
35. Xfmr Power Supply len x gt 46 J2 548 4886 10 WW Regulator m Lnefuse 4 B nre n MAINS LINE 5 10 T 47 440 6O0VAMAX a E 1 MAINS 100 120 220V 240 SSS FUSE 5 0A 2 5A e i Sur O 28 a 6 5 Troubleshooting the Power Supply Transformer Power Switch Transformer Power Switch Use this diagram to verify that the correct voltages are present when the instrument s power cord is connected The table shows the expected values and pin numbers Other rnodules See Module 10 Specs B cB o 6 6 Troubleshooting the Power Supply A28 Power Supply A28 Power Supply Use this diagram to verify that the regulated voltages are present and correct at the output of the power supply board and at the mother board connection to the regulator Use this diagram also to check the fuses on the fuse board The tables show the voltages connectors pin numbers and fuse values Yoltage Pin Number s A29J86 12 8 3 e 28 8 Board 8 e p 38 6 15 as 19 20 23 24 DC Fuse 5 Board F2 4 6 5000 6 7 Troubleshooting the Power Supply Where To Go Next Where To Go Next If any part of the pow
36. chapter 7 The diagnostic program checks the A25 Sum Loop assembly at various frequencies but can only verify operation during static non hopped operations Measurements are made to determine if the A25 Sum Loop assembly can phase lock and that RF power is available on the output If the instrument meets its specifications during static operation but fails during frequency hopping refer to the previous discussion about the A26 Step Loop A assembly A13 Output The main purpose of this assembly is to provide the ability to translate the RF signal from the A25 Sum Loop assembly to different frequency bands and to amplify the RF level For frequencies between 500 MHz and 1000 MHz the path through the 13 Output assembly is straight through and the RF frequency remains constant A divide by 2 is used to create output frequencies from 250 MHz to 500 MHz For frequencies below 250 MHz a heterodyne section is used to mix the frequencies down to the desired output frequency In addition to frequency translation and level correction the A13 Output assembly provides AM modulation capabilities The connections into and out of the A13 Output assembly are shown on Block Diagram 2 The diagnostic procedures verify the tracking filters ALC loop controls and DAC values and measure RF output power at various frequency and power settings 14 12 Block Diagram Theory of Operation Block Diagram 2 A12 Pulse Attenuator In addition to 0
37. location 9 7 part number 9 6 Service Kit 4 5 specs 12 13 theory 14 14 A6 Signaling Source Analyzer diagnostics 15 3 7 part location 9 7 part number 9 6 Service Kit 4 5 theory 14 18 troubleshooting 5 2 A7 Step Loop B theory 14 5 8 part location 9 7 Service Kit 4 5 troubleshooting 5 2 A9 part location 9 7 part number 9 6 Service Kit 4 5 specs 12 15 theory 14 6 Adjustments 9 1 adjustments 7 2 AF Generator theory 14 9 AF_DIAGS theory 15 3 AGC Closed Loop At AM Output Test theory 15 10 AGC Open Loop At AM Output Test theory 15 10 AGC Open Loop Drive DAC Test theory 15 10 AGC Reference DAC Test theory 15 10 All Receiver Mixer Removal 8 10 AM Demodulator Test theory 15 10 Assembly and Disassembly Procedures 8 2 Audio Analyzer theory 14 4 Audio Analyzer 1 Service Kit 4 5 specs 12 5 theory 14 7 Audio Analyzer 1 External Paths theory 15 4 Audio Analyzer 1 Internal Paths theory 15 4 Audio Analyzer 2 Service Kit 4 5 specs 12 3 theory 14 7 15 4 Audio Frequency Generators 1 and 2 theory 15 3 Autorange Attenuator theory 15 8 Aux RF Out to Aux RF In theory 15 11 B Bandwidth Control theory 15 7 BIT ERROR theory 16 2 Block Diagram 1 theory 14 4 Block Diagram 2 Index theory 14 9 Block Diagram 3 theory 14 15 Block Diagram 4 theory 14 17 Block diagram 5 theory 14 18 Block Diagram Theory of Operation 14 2 block diagrams 13 2 calibrat
38. lock up to the correct new frequency The error would appear as a high phase or frequency error at the beginning of the frequency hop Receiver Mixer This modules mixes the input signal from the A23 Input assembly with the LO signal from the A17 Step Loop B assembly or rear panel signal on early versions The sum or difference signal will always be within 50 kHz of 114 3 MHz or 614 3 MHz This signal is then filtered by the 11 Receiver Mixer assembly and passed onto the receiver section The control voltage to select the filter is provided by the 16 Receiver assembly This control voltage is fed into the A11 Receiver Mixer assembly as a dc voltage the same cable that is used for the RF output to the A16 Receiver assembly 14 5 Block Diagram Theory of Operation Block Diagram 1 To measure this signal it is necessary to tee the connection so that the dc control voltage is always available to the 11 Receiver Mixer assembly from the 16 Receiver assembly It is then possible to measure the dc voltages with an external voltmeter or using blocking capacitor a spectrum analyzer can be connected to view the RF signal from the mixer Failure to use a blocking capacitor will cause the switch in the A11 Receiver Mixer assembly to be indeterminate and accurate measurements cannot be made Although the A11 Receiver Mixer assembly does not contain any diagnostic test points it is used extensively during diagnostics to route R
39. same channel On each channel there are eight timeslots so that eight users can be on a channel at the same time The pulses or timeslots are 576 9 uS long The GSM system has the capability of being frequency hopped within the frequency bands This allows the system to hop the telephone to another channel and possibly another timeslot during a telephone call The GSM system uses a 0 3 Gaussian Minimum Shift Keying modulation scheme to modulate the digital data onto the pulsed carrier The digital data for one pulse is made up of both voice data and predefined data that is used for synchronization The voice data is coded to maximize speech quality and minimize errors For most of the characteristics mentioned above the GSM system contains many variables These variables account for the many screens and fields in the HP Agilent 8922 17 3 GSM Theory E GSM DCS1800 and PCS1900 Systems E GSM DCS1800 and PCS1900 Systems GSM900 is the original GSM system using frequencies in the 900 MHz band and designed for wide area cellular operation Mobiles with output powers from to 8W are typical DCS1800 is an adaptation of GSM900 The term GSM can be used collectively to describe the GSM900 and DCS1800 standards Creating DCS1800 involved widening the bands assigned to GSM and moving them up to 1 8 GHz The DCS1800 standard was created to allow PCN Personal Communications Networks to form To avoid confusion the channel numbers ARFCN u
40. signal connected and expected input level set to same as reference signal on RF analyzer page Max second harmonic lt 48 dBc 1 dB Compression gt 12 dBm From A15 Reference SA_20MREF J1 3 gt 3 dBm on spectrum analyzer 10 dBm Typical Waveshape Level Nominal input impedance Amplitude 12 36 From 19 Measurement Assembly SWP_STRT J1 6 Levels CMOS High 5 Start Low Sweep Stop CLK_REF_SA J2 8 Serial Bus SA J2 9 to from A33 DAT REF SA J2 5 Hop Controller Module I O Specifications A18 Spectrum Analyzer Levels TTL Clock Rate z 80 kHz bursts Outputs To A19 Measurement Assembly SA SCPT J1 7 Output Impedance 100 Q Detector Output Max Top of Screen 1 532 V Input 12 dB Res BW 100 kHz Step Gain 0 dB Variable Gain 0 dB Sensitivity 17 6 mV dB typical Det Dynamic Range gt 80 dB Det Linearity Uncal 1 5 dB Log Amp output with no RF applied 120 mV Typical 12 37 Module I O Specifications A19 Measurement A19 Measurement Use extender card 08920 60138 Power Supplies 5 J1 15 16 J2 21 24 420 mA 12 J2 26 120 mA 12 J2 25 120 mA 38 lt 1 12 V Aux J2 28 0 mA 12 38 Inputs Module I O Specifications A19 Measurement Voltmeter Multiplexer Input Z 5 J2 24 21 J1 15 16 12 J2 26
41. test checks the A4 Modulation Distribution assembly The 9 possible paths through the A4 Modulation Distribution assembly are checked using signals from the A6 Signaling Source Analyzer assembly routing the signals to the voltmeter through the A3 Audio Analyzer 1 assembly at AUDI VM or the A2 Audio Analyzer 2 assembly at AUD2_VM for path 9 Modulation Distribution Internal Paths This test checks the A4 Modulation Distribution assembly Using the two inputs from the A6 Signaling Source Analyzer assembly the same paths as the Preliminary Audio Paths test are checked again During the test the gain and attenuation of the paths are varied Modulation Distribution External Paths This test checks the A4 Modulation Distribution assembly Using the AFGI output from the A6 Signaling Source Analyzer assembly the external MODULATION IN AM SPEECH path through the A4 Modulation Distribution assembly is checked The AFGI input is checked first to verify that it can be used as a test signal An external connection is used to route the AUDIO OUT connector on the front panel to the MODULATION IN AM SPEECH connector The gain and coupling of the path are varied The signals are routed from the MOD MON output of the A4 Modulation Distribution assembly to the Audio Analyzer assembly for routing to the voltmeter through the AUDI VM output 15 3 Diagnostics Theory AF_DIAGS Audio Analyzer 1 Internal Paths This test checks the A3 Audio Analyzer
42. the A18 Spectrum Analyzer assembly and the 10 7 MHz to the 9 Global Test and Demod assembly The signal to the A9 Global Test and Demod assembly should be near 3 dBm for good signal to noise ratio and no compression the A9 Global Test and Demod assembly A9 Global Test and Demod The first function of the A9 Global Test and Demod assembly is to downconvert the 10 7 MHz signal from the receiver to 700 kHz 50 kHz This signal is then routed to a counter on the A19 Measurement assembly The frequency of this signal is measured and is used to calculate the RF input signal frequency Measuring an RF input signal frequency is a good method of determining if the frequency translation hardware up to the A9 Global Test and Demod assembly is functioning properly 14 6 Block Diagram Theory of Operation Block Diagram 1 The primary measurements of the A9 Global Test and Demod assembly are phase frequency and amplitude information of the 0 3 GMSK modulation signals The A9 Global Test and Demod assembly measures these by digitizing the 700 kHz IF signal and using high speed DSP hardware and algorithms The DSP hardware must be armed and then triggered to synchronize with the incoming modulation signal These various trigger signals are shown on Block Diagram and the operation of these is described in the HP Agilent 8922 Users Guide The results of these measurements are displayed using the DSP ANL screen on the HP Agilent 8922
43. the instrument power off and reinstall the DAC Upconverter Module The adjustment is now complete Adjustments and Calibration Sum Loop Adjustment Procedure This Page Intentionally Left Blank 7 8 Assembly and Disassembly Procedures 8 1 Assembly and Disassembly Procedures Introduction Introduction Removing and replacing assemblies is straightforward This chapter contains tool lists hints and drawings to help you do it effectively Detailed step by step procedures are not given for all assemblies After replacing certain assemblies you will need to load new calibration data into the HP Agilent 8922 or perform adjustments The calibration data is supplied on a Memory Card that is included with the replacement assembly Refer to chapter 9 Replacing a Part for information about adjustments that are required after replacing certain assemblies CAUTION Perform the following procedures only at a static safe work station The printed circuit assemblies in this instrument are very sensitive to STATIC ELECTRICITY DAMAGE Wear an anti static wrist strap that is connected to earth ground Recommended Torque 1 Screws Tighten until just snug 2 connectors SMC SMA 62 N cm 5 5 Ib in 3 Nuts holding semi rigid coax 51 N cm 4 5 Ib in Further Information For further information refer to chapter 9 This chapter contains more information about Part numbers for replaceable parts Ordering information
44. the rows being scanned with pulses from the A7 Controller and the columns being read by the controller The column lines are pulled up through resistors and are pulled low when a key is pressed The A7 Controller determines which key is being pressed by reading which column line is pulled low and which row the column line is being pulled low through Since the row outputs are tri state the low going pulses are not seen on the output until a key is pressed and the current path is completed The keyboard can be checked with an oscilloscope by disconnecting the ribbon cable from the keyboard and checking for the pull up voltages on the column pins Then with the keyboard connected check that the lines are being pulled low at the A7 Controller connector J4 The pin numbers A7 J4 are the same as those on A1 J1 The ribbon cable connector has a mark to indicate to pin 1 Pin 2 is directly opposite pin 1 HP Agilent 8922E F G H M S Keyboard HP Agilent 8922 A B keys shown in parenthesis Column 0 Column 1 Column 2 Column 3 Column 4 Column 5 Pin 9 Pin 10 Pin 11 Pin 12 Pin 13 Pin 14 CELL ORGCALL RCVCALL ENDCALL L1 K4 L2 K5 CONFIG K3 RF GEN RF ANL CELL 10 down arrow not used SHIFT CANCEL CNTL HOP CNTRL MEAS INCRSET PRESET not used not used not used SYNC PREV INCRx10 up arrow not used not used leftarrow TESTS 7 4 1 0 ON OFF MEAS 5 2 ppm W ARM RECALL 9 6 3 dBuV LOCAL ENTER GHZ dBm
45. theory 15 9 Index RF Analyzer Loop Lock Detector theory 15 9 RF Analyzer Step Loop theory 15 8 RF Detectors 1 theory 15 8 RF Detectors 2 theory 15 8 RF Generator theory 14 9 RF Generator Loop 1 MHz Reference Detector theory 15 6 RF Generator Loop Lock Detector State theory 15 6 RF Generator Loop Output Detector theory 15 6 RF Generator Step Loop theory 15 6 RF Generator Sum Loop Lock Detector State theory 15 6 RF Generator Sum Loop VCO Tuning Level theory 15 6 RF In Out to Aux RF Out Test theory 15 11 RF Input Signal theory 15 9 RF Input Output theory 15 11 RF_DIAGS theory 15 5 Running Memory Card Diagnostics 2 1 2 3 5 5 theory 16 2 16 4 self tests 11 2 Sequence Controller theory 14 16 Serial Bus troubleshooting 5 2 Serial bus troubleshooting 5 3 serial bus theory 14 18 Service Screen 10 2 Signaling Source Analyzer Service Kit 4 5 specs 12 13 theory 14 14 SPEC ANL theory 16 2 16 4 Special Option H03 14 17 Spectrum Analyzer Service Kit 4 5 specs 12 36 theory 14 4 14 7 15 9 Step Attenuator theory 15 8 Step Loop A Service Kit 4 5 theory 14 11 Step Loop A Assembly A26 7 5 Step Loop B Service Kit 4 5 theory 14 11 Stepped Gain theory 15 9 Sum Loop theory 14 12 15 6 Sum Loop Assembly A25 7 5 Summ Loop Service Kit 4 5 Voltmeter theory 14 18 T Temperature Sensor theory 15 8 Temperature Test theory 15 10 theor
46. which blocks of the instrument are used in the various measurements The measurements described include the following e ERROR DSPANL OUTRFSP e PULSE e CW MEAS AF ANL SCOPE SPECANL The descriptions are given in terms of which path the signal under test takes from the front panel to the measurement point This chapter does not describe how a radio under test is stimulated to output the signals that are being measured BIT ERROR A23 Input e 11 Receiver Mixer e A16 Receiver e 9 Global Test and Demod e A31 CODEC The bit error test is a test where a known data pattern is sent to the radio under test and is looped back to measure how many errors are generated by the radio under test through receiving and transmitting the same data The Bit Error test signal is routed through the front panel and through the RF hardware The signal is demodulated at the A9 Global Test and Demod assembly After the signal is demodulated the recovered clock and data signals are routed to the A31 CODEC assembly The A31 CODEC assembly both generates the test data pattern and does the comparison after the data is recovered after being transmitted and received After the measurement is done the measurement numbers are sent to the A7 controller to be sent to the display section 16 2 Measurement Theory Introduction DSP ANL A23 Input e 11 Receiver Mixer e A16 Receiver 9 Global Test and Demod The DSP analyzer
47. 08922 00073 0380 2079 2950 0035 2190 0102 0515 1950 0380 0644 2190 0577 2190 0102 2950 00035 08922 00048 08922 00074 2190 0102 2950 0035 1251 0218 08922 00075 08922 00049 Qty Description Serial Prefix 3216A and Below PLATE REAR PANEL A Only Serial Prefix 3217A and Above PLATE REAR PANEL A Only CONN SCREWLOCK NUT HEX A G Only WASHER LK SCREW M3 X 5 STANDOFF METRIC For Opt 003 Only WSHR LK 1941D WASHER LK A G H Only NUT HEX A G H Only Serial Prefix 3216A and Below PLATE REAR PANEL B Only Serial Prefix 3217A and Above PLATE REAR PANEL B Only WASHER LK A G H Only NUT HEX POST CONNECTOR LOCK B Only Serial Prefix 3235A and Below 8922E All Prefixes PLATE REAR PANEL E F G H M S Only 8922G Prefix 3240400250 and Above PLATE REAR PANEL G Only Mfr Code 28480 28480 00000 00000 00000 00000 00000 00000 00000 00000 28480 28480 00000 00000 00000 28480 28480 Mfr Part Number 08922 00005 08922 00073 ORDER BY DESCRIPTION ORDER BY DESCRIPTION ORDER BY DESCRIPTION ORDER BY DESCRIPTION ORDER BY DESCRIPTION ORDER BY DESCRIPTION ORDER BY DESCRIPTION ORDER BY DESCRIPTION 08922 00048 08922 00074 ORDER BY DESCRIPTION ORDER BY DESCRIPTION ORDER BY DESCRIPTION 08922 00075 08922 00049 245 247 246 249 489 209 A 482 B 541 E G 8922B shown 2
48. 08922 61101 08922 61808 08922 69101 08922 61010 08922 61013 08922 61006 Replacing a Part Replaceable Parts 15 16 18 17 ito 22 Display A23 Under Display 44 CRT SHIELD A24 Not Shown A20 19 9 9 Replacing a Part Replaceable Parts Table 9 5 Item A28 9 10 Agilent Part Number 08922 61043 08645 60132 08645 60133 0515 1860 08645 60134 08645 61155 08645 61122 08922 60141 0515 1137 0515 1851 0515 1960 0590 1794 2110 0010 2190 0584 2190 0585 2190 0586 2360 0229 3050 0686 3050 0892 9100 4757 08645 21005 08645 21031 08645 21032 Replaceable Parts CD Qty Description Ror ROR R0 RB RN OR ee Be Pee POWER SUPPLY BD AY PWR S STBD BD AY FUSE SCREW 1 5FM 3 5 TX BD AY PWR Q PORT FAN ASSY 2 CKT PWR LN MDL ASSY BD AY POWER SPLY SMM3 0 50 PN TX SMM3 0 6SEMPTX SMM4
49. 0A Service Kit Configuring the RF Extender Configuring the RF Extender To extend RF modules it is necessary to use the RF extender board 08922 60129 with the correct coax jumper cables These cables route the RF signals to and from the module and allow the signal path to be accessed for measurements The following table and diagram shows the coax jumpers that are required for each RF module Table 4 1 Coax Jumpers for RF Extender Board On PLUG 1 Connect Pin Number On PLUG 3 Connect Pin Numbers Assembly mI mu mx pp p px pp mas pp x x mus pop p Dx p px NET NM ff x11 11 T Using the HP Agilent 83210A Service Kit Configuring the RF Extender The following example shows how to interpret table 4 2 and install the coax jumpers on the extender board This example shows the configuration for the 13 assembly PLUG MODULE HERE oxo BACK ox 6 28 26 9 3 59 59 5 8333393888 BS 5895889888 Ow 5 ES none x 2 5 JUMPERS e ege PIN 22222 on pin s 3 a NUMBER 17 and 13 PLUG NUMBER PLUG THIS END INTO INSTRUMENT Figure 4
50. 1 Timebase 875 ps div Delay 0 0000 Trigger Levels Ch 1 Parameters P P Volts 387 5 mvolts Chan1 0 000 volts Rise Time 410 ps Fall Time 420 ps Holdoff 70 000 ns Frequency 714 286 MHz Period 1 40 ns Width 690 ps Width 710ps Overshoot 0 0000 volts Preshoot 0 000 volts RMS Volts 135 7 mvolts Duty Cycle 49 28 12 20 16 Receiver NOTE Module I O Specifications A11 Receiver Mixer Outputs RCVR_IN J3 Typical Output Levels Normal 27 to 37 dBm Underrange 37 to 60 dBm Conversion Gain 10 2 dB Temp 4 to 1000 MHz In Flatness Uncal 5 Mhz Referenced from I F center 614 MHz LF 1 5 dB 114 3 MHz LF 1 5 dB IF Filter 114 3 MHz Center 114 3 5 MHz B W 1 dB 40 MHz 5 MHz Rejection gt 35 dB 885 MHz IF Filter 614 3 MHz Center 614 3 0 1 MHz Adjustable B W 1 dB 10 MHz 0 1 MHz Rejection gt 50 dB 885 MHz To measure RCVR_IN the connection must T ed and a DC blocking capacitor used on the measurement cable This is to maintain the DC controlling voltage from A16 Receiver which controls the filters within the receiver mixer It also the blocking capacitor prvents the controlling voltage being loaded by measurement equipment Use a known working reference into RF IN OUT port or if in doubt directly into RF socket on receiver mixer Ensure frequency and port settings are correct on the RF Analyzer page Reduce expected input leve
51. 1 RF Extender Board 4 4 Using the HP Agilent 83210A Service Kit Extending Modules Extending Modules The modules shown in the following table can be extended using the appropriate extender boards from the HP Agilent 83210A Service Kit Assemblies that cannot be extended can usually be accessed directly while the assembly is installed in the instrument Table 4 2 Extender Board Part Numbers s x s A6 Signaling Source Analyzer 08920 60140 7 Controller 08920 60133 08920 90135 8 Memory 08922 60132 9 Global Test Demod 08922 60133 Al3 Output 08922 60129 Al4 GSM Timing Gen 08922 60129 Al5 Reference 08922 60129 16 08922 60129 17 Step Loop 08922 60129 19 Measurement 08920 60138 A33 Hop Controller 08920 60133 4 5 Using the HP Agilent 83210A Service Kit Making Measurements Making Measurements Audio Digital Assemblies The extender boards for the audio and digital assemblies allow the boards to be extended above the instrument This provides better access to signals going to and from these assemblies Refer to the Block Diagrams chapter 13 or Module I O Specs chapter 12 for pin numbers and typical I O characteristics for each assembly Use the extender board shown RF ASSEMBLIES The extender boards for the RF assemblies extend the modules above the instrument This allows better access to control signals and allows the RF input and output
52. 10mV 12 46 NOTE From Front Panel Module 1 0 Specifications A23 Input Agilent 8922M S Only A23 Input Agilent 8922M S Only Applies to Electronic Attenuator only No extender card required Power Supplies 12 16 9 226 mA max 5 16 12 15 mA 12 16 10 286 mA max 12 V Aux J6 5 360 mA max 43 5 20 mA J6 11 Inputs AUX RF INPUT J3 Freq Range 20 to 1000 MHz Trip Level Max Meas Level 10 Watts 20 dBm 25 lt Level lt 28 dBm From 12 Pulse Attenuator From Front Panel SG IN J4 Freq Range 20 to 1000 MHz To avoid removing bottom cover and motherboard covers measure MAIN OUT on A13 output section RF IN OUT Output J1 Freq Range 20 to 1000 MHz 12 47 From Front Panel Module I O Specifications A23 Input Agilent 8922M S Only Outputs AUX RF OUT J2 Freq Range 20 to 1000 MHz Relative path loss with respect to siggen input thru path 0 dB 20 MHz Loss lt 6 dB Loss lt 8 dB Relative path loss with respect to siggen input atten 5 to 125 dB 20 MHz Loss lt 3 dB 1000 MHz 19 Measurement Assembly To All Receiver Mixer Loss lt 3 dB DET LO J6 14 Meas Freq Range Output level Uncal 90 to 1000 MHz OFFSET VOUT LOW 100 mV 50 mV No input Power VOUT LOW 280 mV 50 mV OFFSET 10 dBm 50 M
53. 14 13 12 Pulse Attenuator Removal 8 12 13 part location 9 7 Service Kit 4 5 specs 12 22 theory 14 12 A13 Output diagnostics 15 6 14 part location 9 7 part number 9 6 Service Kit 4 5 specs 12 24 A14 Pulse Driver diagnostics 15 7 Al5 part location 9 9 part number 9 8 Service Kit 4 5 specs 12 26 15 Reference Section diagnostics 15 5 16 part location 9 9 part number 9 8 Service Kit 4 5 specs 12 32 theory 14 6 A16 Receiver diagnostics 15 9 17 part location 9 9 part number 9 8 Service Kit 4 5 theory 14 5 14 11 17 Step Loop B diagnostics 15 8 17 25 12 53 18 part location 9 9 part number 9 8 Service Kit 4 5 specs 12 36 theory 14 7 A18 Spectrum Analyzer diagnostics 15 9 19 part location 9 9 part number 9 8 Service Kit 4 5 specs 12 38 theory 14 18 A2 part location 9 7 part number 9 6 Service Kit 4 5 specs 12 3 theory 14 7 A2 Audio Analyzer 2 diagnostics 15 4 A20 part location 9 9 part number 9 8 Service Kit 4 5 troubleshooting 5 2 21 part location 9 9 part number 9 8 troubleshooting 5 2 A21 HP IB Interface Removal 8 14 A22 part location 9 9 part number 9 8 A22 Display Removal 8 16 A23 part location 9 9 part number 9 8 theory 14 4 14 13 troubleshooting 5 2 A23 A B E F G H specs 12 43 A23 specs 12 47 A23 Input diagnostics 15 7 A23 Input Section Removal 8 18 A24 part location 9 9 part numb
54. 14 18 OUT RF SP theory 16 2 16 3 Output Service Kit 4 5 specs 12 22 theory 14 12 Output Detector Detector Caps theory 15 7 Output Detector Low Level theory 15 7 Output Filter Rejection theory 15 8 Output Frequency Range Loop Closed theory 15 7 Output Section theory 15 6 Output Variable Attenuator theory 15 8 Parallel Bus troubleshooting 5 3 Parallel bus troubleshooting 5 2 parallel bus theory 14 18 PCN 14 2 17 4 PCS 17 4 PCS1900 17 4 performance tests 3 1 performance verification 3 1 periodic calibration 7 2 periodic maintenance 7 2 Power Supplies specs 12 53 Power supplies specs 12 50 Power Supplies and Amplifier Bias theory 15 6 Power Supply specs 12 58 Power Switch 6 6 Power up 1 3 Preliminary Audio Paths theory 15 3 Premod Filter and NSM Service Kit 4 5 Premod filter and NSM 14 9 Premodulation Filter and NSM specs 12 10 Pre Modulation Filter Clock Detector State theory 15 5 Protocol Interface Option 003 theory 14 17 PULSE theory 16 2 16 3 Pulse Attenuator theory 14 13 Pulse Attenuator and Drive theory 15 7 Pulse Attenuator and Drive Test theory 15 7 Pulse Driver specs 12 24 R Receiver Service Kit 4 5 specs 12 32 theory 14 6 15 9 Receiver Mixer specs 12 19 theory 14 5 Reference Service Kit 4 5 specs 12 26 theory 15 5 Replacing a Part 9 1 RF Analyzer theory 14 4 RF Analyzer Loop 1 MHz Reference Detector
55. 22 00056 35 08922 40001 36 0370 2110 37 08920 21023 38 43 0515 1940 45 46 65 47 08922 00041 08922 00042 08922 00080 08922 00082 08922 00038 08922 00083 08922 00086 08922 00085 0370 1001 4 4 N N NNNNA 49 52 2950 0035 54 63 66 70 5041 0944 546 547 5001 0540 548 5041 8802 oR WN gt N N Qty Description BD AY KEY ADAPT EN F SMA CONN SWITCH SPKR HARNESS ASSY G H M Only SWITCH SPKR HARNESS ASSY E F S Only PANEL DRESS A B Only PANEL DRESS E F S Only PANEL DRESS G H M Only MACH FRAME FRONT DIE KEY PAD A B Only KEY PAD E F G H M S Only SMM3 0 6SEMPNTX SMMA 0 IOSEMPNTX NUT HEX 1 4 36 NUT HEX 1 2 28 THD CLIP WINDOW BEZEL CRT KNOB BASE 250 JG CRT WINDOW 5 2 5 6PCHPNTX NAME PLATE A Only NAME PLATE B Only NAME PLATE E Only NAME PLATE F Only NAME PLATE G Only NAME PLATE H Only NAME PLATE M Only NAME PLATE S Only KNOB RND 125 NUT HEX 15 32 32 THD KEY CAP POWER TRIM SIDE 177H TRIM TOP FM Mfr Code Mfr Part 28480 00000 28480 28480 28480 28480 28480 28480 28480 28480 28480 00000 00000 00000 28480 28480 00000 00000 00000 28480 28480 28480 28480 28480 28480 28480 28480 00000 00000 00000 00000 00000 Number 08920 60201 ORDER BY DESCRIPTION 08922 61037 08922 61085 08922 00009 08922 90079 08922 00053
56. 3 GMSK modulation the RF signals must also be pulse modulated because the GSM system uses TDMA time division multiplexing The function of the A12 Pulse Attenuator assembly is to pass the RF output signal with 0 dB 30 dB or gt 80 dB of attenuation The 12 Pulse Attenuator assembly allows straight through operation to simulate the RF carrier ON or it provides gt 80 dB of attenuation to turn the RF carrier OFF In addition to these two functions the 12 Pulse Attenuator assembly can provide calibrated 30 dB of attenuation This is used to test a radios ability to recover a weak signal with other high power signals in adjacent time slots The diagnostics procedures check this assembly by using the internal RF spectrum analyzer The pulse attenuator itself is solid state and highly reliable Diagnosing the attenuator requires many other assemblies in the HP Agilent 8922 Diagnostic failures of the Pulse Attenuator could also be caused by the A23 Input 11 Receiver Mixer A16 Receiver 17 Step Loop or 18 Spectrum Analyzer assemblies or a missing LO cable on the rear panel early instruments A23 Input A24 High Power Attenutor The A23 Input assembly is both the input for the Signal Analyzer section and the final output from the Signal Generator section For additional information on how the A23 Input assembly is used in the signal analyzer refer to the Block Diagram 1 discussion The RF output signal is received from the
57. 31 237 239 243 222 230 461 483 485 Washer 213 221 462 486 488 Nut Replacing a Part Replaceable Parts 2360 0229 Screw 2190 0585 Washer 211 212 9 27 9 14 Replacing a Part Replaceable Parts Miscellaneous Replaceable Parts Item Agilent Part Number 26 205 207 1400 0249 53 08590 80007 64 208 1400 1391 67 69 78 5041 7250 71 77 0400 0112 238 08920 00063 534 536 1400 0249 490 0400 0112 49 1400 0611 210 6960 0132 544 2110 0083 544 2110 0055 545 9230 0260 553 08642 00138 654 661 08922 00076 5180 1871 9 28 CD Qty Description Qoo OF we _ pi 71 77 490 491 654 661 CABLE TIE LBL WARNING CRT CLAMP CABLE CABLE CLIPS GROMMET SNAP IN CAUTION LABEL CABLE TIE GROMMET SNAP IN CLAMP CABLE PLUG FUSE 2 5A MED FUSE 4A MED ENV VOLT WARNING LBL 2 PERSONLIFT PLATE BLOCK LBL BLK SERIAL Mfr Code Mfr Part Number 00000 00000 00000 00000 00000 28480 00000 00000 00000 00000 00000 00000 00000 28480 28480 00000 210 ORDERBY DESCRIPTION ORDER BYDESCRIPTION ORDER BY DESCRIPTION ORDER BY DESCRIPTION ORDER BY DESCRIPTION 08920 00063 ORDERBY DESCRIPTION ORDER BY DESCRIPTION ORDER BY DESCRIPTION ORDER BY DESCRIPTION ORDE
58. 3220E diagnostic tests are less extensive 15 12 Diagnostics Theory Interpreting Results Interpreting Results When a failure occurs a message is displayed showing the number of failures and the probability that the failure is caused by the assembly being tested If the probability is not high more measurements may be necessary to verify the failure The probability assigned is based on the following criteria Low A failure occurred but the signal being used for the measurement originates in another assembly and has not been previously tested on this assembly Low probability is also assigned for the first measurement made to an assembly Medium A failure occurred and the signal being used for the measurement originates in another assembly and has already been measured good but the measurement mux multiplex point or digital detector has not previously been used High A failure occurred and the signal being used for the measurement originated in another assembly and has already been measured good and the measurement mux point or digital detector has already been used The RF diagnostics assign probability based on the first failure that occurs The audio diagnostics assign probability based on a series of measurements 15 13 Diagnostics Theory Interpreting Results This Page Intentionally Left Blank 15 14 16 Measurement Theory 16 1 Measurement Theory Introduction Introduction This chapter describes
59. 6 Channel 2 Timebase Delta T Start Delta V Vmarker1 From 15 Reference Module I O Specifications A27 DAC Upconverter 500 0 mvolts div Offset 1 450 volts Trigger mode Edge on negative edge on Chan2 50 0 ps div Delay 0 0000 s Trigger Levels Chan1 1 450 volts 1 880 ps Holdoff 70 000 ns 248 380 ns Stop 246 500 ns 2 470 volts 420 0 mvolts Vmarker2 2 890 volts 10 MHz Ref C J1 19 Waveshape Sine Level gt 10 dBm Harmonics 25 dBc Frequency 10 MHz See A15 Reference page 12 26 for measurement procedure Outputs To A19 Measurement Board AUXA VM J2 6 13 4 present level 0 3 to 0 5 Vdc into IM Q 13 4 MHz not present level 0 3 to 0 5 Vdc into IM Q To A25 Sum Loop A DAC_UP_OUT J3 15 Frequency 13 4 MHz 50 kHz Modulation Resolution 1 Hz Level 0 dBm 3 dB Harmonics lt 30 dBc Spurs gt 5 kHz offsets lt 60 dBc See A25 Sum Loop page 12 50 for measurement procedure 12 57 Module Specifications A28 Power Supply A28 Power Supply This spec is for the complete assembly which includes the transformer and plug in boards Input Nominal Line Voltages 100 120 22 240 Tolerance 7 14 Frequency Range 48 to 440 Hz O Overvoltage protected O 21 Volts and 25 Volt supplies always all other supplies controlled with front panel power switch O Short circuit protected O Ther
60. 85 01650 84502 T wd POUCH ACCESORY 586 589 0590 0025 04 NUT HEX 589 592 3050 0894 0 4 WSHR FL MS OID 593 5060 4479 8 1 COVER ASSY KIT 595 598 0515 0899 8 4 SMM4 0 20PL PNPD 604 605 08922 61076 5 d Order 08922 21008 607 5062 3990 0 1 FRONT HANDLE KIT 08922 21008 5 3 HANDLE ASSY Option 002 9 18 Mfr Code 00000 00000 00000 00000 00000 28480 00000 28480 00000 00000 28480 00000 00000 28480 00000 00000 00000 00000 00000 00000 00000 28480 00000 28480 Mfr Part Number ORDER BY DESCRIPTION ORDER BY DESCRIPTION ORDER BY DESCRIPTION ORDER BY DESCRIPTION ORDER BY DESCRIPTION 08645 40015 ORDER BY DESCRIPTION 08922 00065 ORDER BY DESCRIPTION ORDER BY DESCRIPTION 08922 00066 ORDER BY DESCRIPTION ORDER BY DESCRIPTION 08922 40004 ORDER BY DESCRIPTION ORDER BY DESCRIPTION ORDER BY DESRIPTION ORDER BY DESCRIPTION ORDER BY DESCRIPTION ORDER BY DESCRIPTION ORDER BY DESCRIPTION 08922 61076 ORDER BY DESCRIPTION 08922 61076 Replacing a Part Replaceable Parts 554 468 481 549 552 537 540 5041 8801 523 524 Option 002 604 605 607 537540 3 9 585 fF 586 589 564 581 584 E 593 6 573 574 m 599 602 577 580 Screw 569 572 Internal Lid 589 592 Washer sam 595 598 Screw 11 Nut 9 19 Table 9 9 Replacing a Part Replaceable Parts Replaceable Parts I
61. A33 08922 60202 7 A34 08922 60142 4 A34 08922 60244 6 A35 08922 60160 6 A35 08922 60152 6 A36 08922 60154 8 A37 08922 60151 5 A38 08645 60137 1 457 08922 00017 6 458 08922 00018 7 459 460 2360 0195 0 461 2190 0102 8 462 2950 0035 8 W27 08922 61056 W100 08645 61089 4 108110 4 9 12 Qty Description Se Se ee bee eee MGSM CODEC E F G H M S Only GSM CONTROLLER Order 08922 60176 GSM CONTROLLER Order 08922 60176 GSM CONTROLLER Order 08922 60176 GSM CONTROLLER Without EPROMS HOP CONTROLLER RTI BYPASS 8922 A Only GSM RTI 8922 E F G H M S Only PROTOCOL INTERFACE G H Opt 003 Only B REFERENCE B Only FIFO GPIO 8922B B Only SEQ CONTROLLER B Only BD AY TIMEBASE Opt 001 Only BRACKET TIMEBASE COVER TIMEBASE SM 632 312PNPD WSHR LK 472ID NUT HEX 15 32 32 CX F SMC BNC CABLE CA MCNDCT 6CKT RIBBON CABLE XTAL OSC 10 MHZ Mfr Code 28480 284 284 284 284 284 284 284 284 284 284 284 284 284 284 80 80 80 80 80 80 80 80 80 80 80 80 80 80 00000 00000 00000 28480 28480 28480 Mfr Part Number 08922 60147 08922 60146 08922 60162 08922 60167 08922 60167 08922 60202 08922 60142 08922 60144 08922 60160 08922 60152 08922 60154 08922 60151 08645 60137 08922 00017 08922 00018 ORDER BY DESCRIPTION ORDER BY DESCRIPTION ORDER BY DESCRIPTION 08922 61056 08645 61089 10811D 5 Replacing a
62. Assembly Level Repair HP Agilent Technologies 8922 Series GSM Test Set amat x Se Agilent Technologies Agilent Part No 08922 90213 Printed in UK January 1998 Copyright 1998 Agilent Technologies rights reserved Reproduction adaptation or translation without prior written permission is prohibited except as allowed under the copyright laws Introduction Introduction The HP Agilent 8922 product family uses an assembly level repair service strategy The HP Agilent 8922 may be sent to an Agilent Technologies Sales and Service office or may be repaired on site This book is used for both Agilent Technologies service and owner service The HP Agilent 8922 product family currently contains the HP Agilent 8922A HP Agilent 8922B HP Agilent 8922E HP Agilent 8922F HP Agilent 8922G Agilent 8922H HP Agilent 8922M and HP Agilent 8922S There are differences in both the hardware and in the operation In examples and task sequences this book presents general usage and graphical instrument representations may not exactly match the HP Agilent 8922 that you are servicing Repairing the HP Agilent 8922 To repair the HP Agilent 8922 follow the chapters in this book starting at the beginning and following the where to go next guidelines Book Organization This book contains problem identification sections assembly replacement sections reference information and concept information The chapters are sectio
63. CBL 16 CONDUCTOR 28480 08922 61055 W34 08922 61041 4 SR CABLE PULSE TO OUT 28480 08922 61041 W35 08922 61040 3 SR CABLE M BD TO PULSE 28480 08922 61040 W36 08922 61054 9 POWER SUPPLY CABLE 28480 08922 61054 W37 08922 61039 0 RIBBON CBL 37 CONDUCTOR 28480 08922 61039 W38 08922 61060 7 RIBBON CBL 34 CONDUCTOR 28480 08922 61060 W39 08922 61005 0 POWER SUPPLY CABLE ASSY 28480 08922 61005 40 08922 61067 4 COAX SMC BNC Only 28480 08922 61067 41 08922 61068 5 COAX SMC BNX Only 28480 08922 61068 42 08922 61069 6 COAX SMC BNC Only 28480 08922 61069 W43 08922 61051 6 RIBBON CABLE 50 CND B Only 28480 08922 61051 44 08922 61052 7 B REF RIBBON 16 CND Only 28480 08922 61052 45 08922 61053 8 COAX SMC SMC Only 28480 08922 61053 9 14 Replacing a Part Replaceable Parts Table 9 7 Replaceable Parts Item Agilent Part CD Qty Description Mfr Mfr Part Number Number Code 46 08922 61050 5 1 EMMI CABLE Only 28480 08922 61050 47 08922 61077 6 1 RIBBON 16 CND 28480 08922 61077 48 08922 61078 7 1 RIBBON 26 CND 28480 08922 61078 49 08922 61080 1 1 CABLE 28480 08922 61080 50 08922 61081 2 1 CABLE 28480 08922 61081 51 08922 61082 3 1 28480 08922 61081 52 08922 61077 6 1 RIBBON CABLE 16 CND 28480 08922 61077 9 15 Replacing a Part Replaceable Parts
64. Chapter 14 Block Diagram Theory has a detailed technical discussion of the function of each assembly in the block diagrams Reading the Pin Numbers The signal names and pin numbers are shown on the diagrams the pin numbers are numbered according to the plug number found on the module the jack number found on the mother board and the pin number For example P2 J23 14 P2 indicates that the signal is found on the module at Plug 2 J23 indicates the signal is found on the mother board on Jack 23 14 indicates that pin number 14 On plug 2 and Jack 23 carries the signal Block Diagram 1 Block Diagram 1 contains the RF and Audio Analyzer circuits in HP Agilent 8922 These are the primary circuits used to make measurements The Spectrum Analyzer is an option in the HP Agilent 8922F H M S The 14 dB input attenuator is replaced with an 8 dB attenuator in the HP Agilent 8922F H M S Block Diagram 2 Block Diagram 2 contains the RF and Audio Generator circuits This block diagram contains the generator hardware that is common to all three models of HP Agilent 8922 13 2 Instrument Block Diagrams Introduction Block Diagram 3 Block Diagram 3 contains circuits found only in the HP Agilent 8922B These circuits are used with the RF Generator circuits BD2 to generate GSM signals These circuits can only be controlled with the rear panel GPIO connector on the HP Agilent 8922B Block Diagram 4 Block Diagram 4 illustrates t
65. Connection 3 Gate Time RAM Initialize 11 FHM and restart 1 Voltage This field displays the voltage measured at the selected voltmeter connection 2 Frequency This field displays the frequency measured at the selected counter connection 3 Voltmeter Connection This field selects the voltage test point The voltage will be measured and displayed in the voltage field 10 2 Service Screen Introduction 4 Counter Connection This field selects the frequency test point The frequency will be counted and displayed in the frequency field 5 Gate Time This field selects the gate time used by the frequency counter 6 Latch This field selects the data latch to be read or written to 7 Value This field displays the present value of the selected latch This field is also used to set the latch value of writable latches 8 RAM Initialize This field clears all RAM memory RAM memory contains recall registers and test pro grams A quick RAM initialize can be carried out by holding in the LOCAL and Hz keys while powering on the HP Agilent 8922 Release the keys after the self test beep 10 3 Service Screen Introduction This Page Intentionally Left Blank 10 4 11 Self Test Error Messages 11 1 Self Test Error Messages Introduction Introduction This chapter lists the error messages that appear on the status line of the display and on the message screen when t
66. Data and clock signals into GMSK Outputs To A27 DAC Upconverter NSM_IF_CLK J2 1 Frequency 17 3333 MHz 250 Hz Level TTL The NSM_CLK signal can be sensed on the SERVICE Screen using the nsm_pmf_clk_pres_int_sense latch a value of 1 for lock and 0 for OOL Out Of Lock state An OOL condition can cause high phase and frequency error problems See Figure 4 1 on page 12 12 for typical oscilloscope readings On a Spectrum Analyzer the peak marker should be gt 6 dBm 12 11 Module Specifications A5 Premodulation Filter and NSM s 188 888 as Figure 4 1 Typical Oscilloscope Display Channel 1 500 0 mvolts div Offset 1 810 volts Trigger mode Edge on positive edge on Chan1 Timebase 20 0 ns div Delay 0 000s Trigger Levels Ch 1 Parameters P P Volts 3 187 volts Chan1 1 810 volts Rise Time 13 660 ns Fall Time 7 540 ns Holdoff 70 000 ns Frequency 17 3310 MHz Period 57 700 ns Width 32 710 ns Width 24 990 ns Overshoot 250 0 mvolts Preshoot 187 5 mvolts RMS Volts 2 343 volts Duty Cycle 56 68 Serial I O From A34 RTI Assembly Hop Control NSM J2 38 CLK_NSM J2 39 DAT_NSM J2 40 Levels TTL Clock Rate 100 kHz bursted non hopping generator 1 MHz bursted hopping generator The HOP CONTROL lines can be measured at 5 Vdc 12 12 Module I O Specifications 6 Signaling Source Analyzer A6 Signaling Source Analyzer Use extender ca
67. F Analyzer setting the measurement will not register DEMOD_AUD J2 6 Output impedance lt 10 Q Maximum Voltage Output 12 Vp DC coupled AM Depth 0 to 95 Sensitivity 0 01 V AM DC coupled FM Max Deviation 100 kHz Sensitivity 20 wV Hz To 9 Global Test Demod 10 7M_IF J3 9 Freq 10 7 MHz 50 kHz Level 3 dBm 0 2 dB Output Impedance 500 Global Phase Error lt 0 8 RMS lt 1 5 Peak Global Freq Error lt 1 5 Hz Harmonics lt 40 dBc Refer to 9 Global Test and Demod page 12 15 for measurement procedure 12 34 Module I O Specifications A16 Receiver 18 Spectrum Analyzer SA_114 3_M J3 13 Frequency 114 3 MHz 5 MHz Level 20 dBm 19 Measurement Assembly Voltmeter MUX AUX7_VM J2 7 Voltage range 5V 12 35 Module Specifications A18 Spectrum Analyzer A18 Spectrum Analyzer Use extender card 08922 60129 Use coax jumpers on Plug 1 pins 3 and 17 Plug 2 pin 17 Power Supplies 12 V 165 mA 12 V J2 3 300 mA 5 J2 4 225 mA Ground J1 1 2 4 20 J3 1 16 18 20 Inputs From A16 Receiver Needs Reference Input to obtain a reading SA_114 3M P3 17 Frequency 114 3 MHz 5 MHz Max Ref Level 12 dBm Corresponds to 23 dBm input at 8922 Aux RF In with 20 dB RF attenuation and 20 dB Step Gain 20 dBm on Spectrum Analyzer with Reference
68. F test signals into the A16 Receiver and A18 Spectrum Analyzer assemblies 16 Receiver The A16 Receiver assembly input signal from the A11 Receiver Mixer assembly is either 114 3 MHz or 614 3 MHz If the signal is 614 3 MHz it is immediately downconverted to an IF of 114 3 MHz by a 500 MHz reference signal from A15 Reference assembly This signal at 114 3 MHz is then filtered and split It is routed to the A18 Spectrum Analyzer assembly and to another mixer where it is further downconverted for demodulation The LO for the next downconversion is 125 MHz which is derived from the same 500 MHz reference signal that was used earlier The signal is now at 10 7 MHz 50 kHz This signal is a duplicate of the input signal except the frequency has been translated It still contains the pulse and modulation information The primary signal path for this signal is to the A9 Global Test and Demod assembly where frequency and phase accuracy are measured The 10 7 MHz signal also drives an FM discriminator and pulse detector that demodulate the signal The demodulated waveforms are then routed to the front panel A3 Audio Analyzer 1 assembly or A9 Global Test and Demod assembly depending on the switch settings These connections are detailed in Block Diagram 1 The A16 Receiver assembly has extensive diagnostics which test the internal filters switches and demodulators The most critical signals from the A16 Receiver assembly are the 114 3 MHz signal for
69. FM Motherboard 38 J3 17 FM Motherboard 12 J2 25 12 AUX J2 28 IN_TEMP J3 4 IN_VOLT J3 5 DET_LO J3 7 DET_HI J3 6 AUD1_VM J3 8 FM Audio Analyzer 1 AUD2_VM J3 3 FM Audio Analyzer 2 VM ID J3 10 VM J2 12 RSYN_DIAG J3 9 1G_DIAG J3 11 From Reference Section A15 500M_DIAG J3 13 From Reference Section A15 LFS1_VM J3 21 FM SIG Source Analyzer LFS2_VM J3 20 FM SIG Source Analyzer OUT1_DIAG J3 15 FM Output Section A13 PS_VM Internal CURRENT_SEN_VM J2 30 SGND Internal AUX1_VM J3 8 From Step Loop A A26 AUX2_VM J3 30 From Step Loop B A17 AUX3_VM J3 14 From Sum Loop A25 AUX4_VM J3 16 From DAC Up Convertor A27 AUX5_VM J3 18 FM Motherboard AUX6_VM J3 19 FM Motherboard SCOPE_1 Internal SCOPE_2 Internal VREF Internal VREF Internal gt 1 MQ 1000 pF Full scale input 5V DC Offset lt 100 mV Uncalibrated Vref 5V 3 mV Env 15 mV Vref 5V 3 mV Env 15 mV Vref Aging 0 125 mV 1000 hrs 12 39 Module I O Specifications A19 Measurement Scope Multiplexer PROC_AUD J3 24 FM Audio Analyzer 2 A2 SA_SCP J3 23 From Spectrum Analyzer A18 RI_SCP J3 26 From Spectrum Analyzer A18 AUX SCP J3 21 DET LO Internal DET HI Internal GROUND Internal CALIBRATION REFERENCE Internal No Minimum Input Max Input 10 V Input Z gt 1M No capacitance DC Offset 100 mV Uncalibrated AD Ref Volta
70. Hz VOUT HIGH 53 V LOW 1st MIX IN J5 Freq Range Output Level Normal 20 to 1000 MHz 12 dBm to 22 dBm Underrange 22 dBm to 50 dBm Measure using known reference signal refer to A11 Receiver Mixer page 12 19 for procedure 12 48 Module I O Specifications A23 Input Agilent 8922M S Only 19 Measurement Assembly TEMP_DET IN_VOLT J6 15 Temperature sensor voltage Nominal Output 2 98 1 Volts 25 Deg Sensivitity 10mV C DUPLEX DET Duplex port RF peak detector Voltage Nominal 100 mV 20 mV 10 dBm Trip Level 785 mV 10 mV ANT_DET Antenna port RF peak detector voltage Nominal 150 mV 50 mV 10 dBm Trip Level 400 mV 10 mV FILTER_OUT_DET Receiver Output Port RF peak det Voltage DET_HIGH RF Power peak detector high level voltage Output See DET HI LO specs RF Power Detector GND Input Section Analog Ground Nominal 10mV 12 49 Module Specifications A25 Sum Loop A25 Sum Loop Use extender card 08922 60129 Use coax jumpers on Plug 1 pin 3 Plug 3 pins 3 17 Power Supplies 15 V J2 2 300 mA 15 V J2 3 70 mA 45V J2 4 100 mA Ground J1 1 2 4 20 J3 1 2 4 16 18 20 Inputs From A27 DAC Upconverter DAC_UP_OUT J3 3 Frequency 13 4 MHz 50 kHz Modulation Level 0 dBm 3dB measured on spectrum analyzer Waveshape sine no modulation Amp
71. Hz offsets Residual FM 0 3 to 3 kHz BW Phase Noise At 20 kHz offset lt 60 dBc lt 3 Hz 110 dBc Amplitude To 19 Measurement Assembly Voltmeter MUX 1G_DIAG J2 1 164 MV ms 500 mVp p Level if present gt 0 20 V Level if not present or turned off To A19 Measurement Assembly Voltmeter MUX 500M_DIAG J2 6 lt 0 10 Level if present Level if not present or turned off 12 31 Module Specifications A16 Receiver 16 Receiver Use extender card 08922 60129 Use coax jumpers on Plug 1 pins 3 7 and 13 Plug 3 pins 3 9 and 13 Power Supplies 15 J2 2 380 mA 15 V J2 3 80 mA 5 J2 4 100 mA Ground J1 1 2 4 6 8 10 12 15 20 J3 1 2 4 8 10 12 14 20 Inputs From A33 Hop Controller Hop Control P 2 5 8 Levels TTL Clock Rate 180 kHz bursted From 15 Reference 500M_REF P3 3 Freq 500 MHz 2 5 kHz Input Level 0 2 dBm Spurs at gt 5 kHz offsets lt 110 dBc Waveshape sine Amplitude 164 MVims 500 mVp p From A11 Receiver Mixer RCVR IN J1 3 114 3 MHz or 614 3 MHz t 5 MHz Input Level 14 dBm to 53 dBm CAUTION Connection must be T ed and measurement line must have DC blocking capacitor Refer to A11 Receiver Mixer page 12 19 for full measurement procedure 12 32 Module I O Specifications A16 Receiver Outputs To A9 Globa
72. I I l 1 E t Typical Display Channel 1 1 000 volts div Offset 280 0 mvolts Trigger mode Edge on positive edge on Chan1 Timebase 2000 ns div Delay 0 0000s Trigger Levels Ch 1 Parameters P P Volts 4 625 volts Chan1 280 00 mvolts Rise Time 423 590 ns Fall Time 423 660 ns Holdoff 70 000 ns Frequency 699 580 kHz Period 1 42943 ns Width 740 980 ns Width 688 450 ns Overshoot 0 0000 mvolts Preshoot 62 49 mvolts RMS Volts 1 617 volts Duty Cycle 51 83 12 18 From A23 Input Section NOTE From A17 Step Loop B Module I O Specifications A11 Receiver Mixer A11 Receiver Mixer No extender card required Power Supplies 5 70 mA Inputs 1st MIX IN J2 Frequency Range 0 4 to 1000 MHz Level using known reference 20 dB compared to reference connected to RF IN OUT setting Ensure the reference setting and RF Analyzer are set to the same frequency EXT REF IN J1 Frequency Range 500 to 1000 MHz Input Level LO Local Oscillator Frequency will be 114 3 MHz or 614 3 MHz away from frequency set on RF Analyzer page depending on which one is furthest away from chosen analyzer frequency See Figure 4 5 on page 12 20 for a typical display 12 19 Module Specifications A11 Receiver Mixer Figure 4 5 Typical Display Channel 1 130 0 mvolts div Offset 0 000 volts Trigger mode Edge on positive edge on Chan
73. It is down converted to 700 kHz 50 kHz within the Global Test and Demod assembly To obtain a reading either with an oscilloscope See Figure 4 2 on page 12 16 or spectrum analyzer the signal needs to be looped back This can be done using the RF diagnostics and pausing on test 1 for Receiver Down converters with spectrum analyzers If the generator path is in doubt use a known working reference signal into a port remembering to check settings on RF analyzer page for frequency and port settings 12 15 Module Specifications 9 Global Test and Demod Figure 4 2 Expected Output Channel 1 500 0 mvolts div Offset 50 00 volts Trigger mode Edge on positive edge on Chan1 Timebase 20 0 ns div Delay 0 0000 5 Trigger Levels Ch 1 Parameters P P Volts 1 468 volts Chan1 50 mvolts Rise Time 27 540 ns Fall Time 27 000 ns Holdoff 70 000 ns Frequency 10 6998 MHz Period 93 460 ns Width 46 790 ns Width 46 670 ns Overshoot 31 25 mvolts Preshoot 93 75 mvolts RMS Volts 482 0 volts Duty Cycle 50 06 12 16 From 15 Reference Section Figure 4 3 Module I O Specifications A9 Global Test and Demod 20M REF A J1 11 Spurs gt 5 kHz offsets Wave Shape Sine Frequency 20 MHz 1 ppm Requires Ext Ref of 1 ppm Level gt 0 dBm 500 MV ms Harmonics 25 dBc 110 dBc Figure 4 3 on page 12 17 shows the expected oscilloscope reading This signal can also be clear
74. OP J21 3 TTL levels 100 pA Low drive requirement Triggered by Amplitude SEQ_HOP J21 2 2mA Rising edge High drive requirement Low drive requirement Triggered by TTL levels 100 Rising edge SEQ HOP RESET J21 1 Amplitude High drive requirement TTL levels 100 uA Low drive requirement 2mA Active Level Low RESET_SELECT J21 19 Format Amplitude TTL levels High drive requirement 100 uA Low drive requirement 1 mA high reset to zero low reset to table location specified by the ADDRESS 12 60 Front Panel Input Module I O Specifications A33 Hop Controller PULSE MOD IN J21 68 ON latency 25 uS OFF latency 10uS Amplitude TTL levels High No attenuation of sig gen output Low Attenuate sig gen output 100 pA mA High drive requirement Low drive requirement Host Processor Interface GADDR J21 57 58 62 66 80 81 78 79 GDATA J21 83 86 88 90 95 GLDS J21 76 G R W J21 77 IO INT J21 97 Outputs SEQ TRIG OUT J21 21 Amplitude TTL levels EA60 SWO0 2 J21 71 72 73 Amplitude TTL levels 12 61 Module Specifications A33 Hop Controller Fast Hop Busses I O Clock Data and Enable INPUT SECTION J21 40 46 44 STEP LOOP A J21 29 27 30 STEP LOOP B J21 37 35 36 PREMOD FILTER amp
75. Operation Block Diagram 3 HP Agilent 8922B Only Block Diagram 3 HP Agilent 8922B Only The HP Agilent 8922B contains 3 modules A35 B Reference A36 FIFO GPIO and A37 Sequence Controller assemblies that are not used in either the HP Agilent 8922A or HP Agilent 8922G The function of these three modules can only be controlled using the rear panel GPIO connector found only on the HP Agilent 8922B and the special control software that is supplied with the HP Agilent 8922B At power up the HP Agilent 8922B appears to be an A version and should respond exactly the same as an HP Agilent 8922A The overall operation of the HP Agilent 8922B is to buffer and synchronize data from an external computer This data is then transmitted by the HP Agilent 8922 Generator hardware The internal connections of this hardware are illustrated in Block Diagram 3 To the user at the front panel and for the memory card diagnostics the instrument appears to be an HP Agilent 8922A Any signals that are generated by the HP Agilent 8922B hardware appear as external for the control settings For diagnosing problems with these modules it is necessary to use the HP Agilent 8922B software The software contains testing routines that load the buffers with data and read the data back The software is also necessary to control the switches and circuits within the modules A35 B Reference This module contains the VCO and divider circuits necessary to
76. Out Aye PE UT AU Figure 1 6 Front Panel Connections for the RF Analyzer Pes GEENA ARC NOTE On the HP Agilent 8922A B press RF GEN RF ANL On the HP Agilent 8922E F G H M S press RF GEN RF ANL 1 12 1 7 Set the RF Analyzer Frequency field to 935 MHz 1 Localizing the Problem If Power Up Happened Correctly Set the RF Analyzer Amplitude field to 10 dBm 2 Set the Mod Source GMSK field to Select More in the bottom right hand corner of the screen 4 1 2 RF GENERATOR RF RH Gen Mod plitude 85 0 Aften Hold Analyzer MHZ dEn RF Input Control Oren Auto DAC Value Rccuracy 3 3 RL YZER RF Gen Hop Control Hop Mode Hor Tria TTEBEETIT RF Rnalvzer Control Mode Frequency kHz Anplitude ny Cauglins To Screen RF Generator Analyzer Settings 1 13 Localizing the Problem If Power Up Happened Correctly Select CW AF ANL from the list of choices and read the CW Freq 5 and CW Power 6 fields 5 6 MEASUREMENT CH Power 896 699503 6 69 Note CH Measurements not valid for pulsed signals Meas Cntl RF Input RF Cnt Gate RF IN OUT MOBILE Expected Input Chan Leu Frequency Anplitude Tineslot MHz dEn Hore Fig
77. Part Replaceable Parts W27 A38 TIMEBASE Opt 001 2 i d 1 7 29 A33 ASA AEF GH A31 E G H At bottom A37 B A36 B 9 13 Replacing a Part Replaceable Parts Table 9 7 Replaceable Parts Item Agilent Part CD Qty Description Mfr Mfr Part Number Number Code 22 1 08920 61020 7 CABLE RIBBON CRT MBOARD 28480 08920 61020 WI 08920 61012 7 CABLE RF OUT ATTEN 28480 08920 61012 W2 08922 61028 7 CABLE M BD 114 TO SCOPE IN 28480 08922 61028 w3 08920 61016 1 CABLE RIBBON INPUT CONTROL 28480 08920 61016 WA 08920 61013 8 CABLE ATTEN INPUT HEATSINK 28480 08920 61013 WS 08922 61027 6 CABLE M BD J11 TO MOD AM 28480 08922 61027 W6 08922 61033 4 CABLE M BD J58 TO MOD DATA 28480 08922 61033 WT 08922 61035 6 CABLE MBD J83 TO MEAS TRIG 28480 08922 61035 Ws 08922 61036 5 CABLE M BD 184
78. R BY DESCRIPTION ORDER BY DESCRIPTION ORDER BY DESCRIPTION 08642 00138 08922 00076 ORDER BY DESCRIPTION 67 69 78 Replacing Part Firmware Upgrades Firmware Upgrades In The Agilent 8922M HOST and GSM Firmware are upgraded using an external controller or Personnal Computer In The HP Agilent 8922 S The firmware for the HP Agilent 8922A B E G E H S is grouped in single ROM sets These sets are listed below It is recommended that a complete set is used each time a firmware upgrade needs to be made HP Part Number Description 08922 61087 8922A B ROM Upgrade 08922 61088 8922E ROM Upgrade 08922 61089 8922G ROM Upgrade 08922 61116 8922F ROM Upgrade 08922 61117 8922H ROM Upgrade 08922 61149 89228 ROM Upgrade 9 29 Replacing a Part Firmware Upgrades This Page Intentionally Left Blank 9 30 10 Service Screen 10 1 Service Screen Introduction Introduction This chapter describes the fields on the service screen The service screen is intended to support component level repair and the features are of greatest use with component level documentation Component level documentation is beyond the scope of this book and Agilent Technologies does not currently support component level support for the HP Agilent 8922 product family outside of the factory 1 2 SERVICE Voltage ELEM Freauency kHz 0 00122 649 82487 Voltmeter Connection 4 Counter
79. RIG HCMOS Vih 4 V Vil 1 V RI SCP TRIG HCMOS EXT TRIG HCMOS Maximum Input 12 42 15 EXT TRIG Module I O Specifications A23 Input HP Agilent 8922A B E F G H Only A23 Input HP Agilent 8922A B E F G H Only NOTE Applies to Mechanical Attenuator only No extender card required Power Supplies 12 769 215 5 16 12 15 mA 12 16 10 190 mA 12 V Aux J6 5 206 No relays 220mA With relays 360 mA Prescaler 460 mA 43 5 20 mA J6 11 Inputs From Front Panel AUX RF INPUT J3 Freq Range 4 to 1000 Max Meas Level 10 Watts 20 dBm Trip Level 25 Level 28 dBm From A12 Pulse Attenuator SG IN J4 Freq Range 4 to 1000 MHz To avoid removing bottom cover and motherboard covers measure MAIN OUT on A13 output section 12 43 Module Specifications A23 Input HP Agilent 8922A B E F G H Only From Front Panel RF IN OUT Output J1 Freq Range 4 to 1000 MHz Outputs From Front Panel AUX RF OUT J2 Freq Range 4 to 1000 MHz Relative path loss with respect to siggen input thru path 0 dB Loss lt 1 dB 4 MHz 1000 MHz Loss 6 dB Relative path loss with respect to siggen input atten 5 to 125 dB 4 MHz Loss 3 dB 1000 MHz Loss 10 dB To A19 Measurement Assembly DET LO J6 14 Meas Freq Range 4 to
80. Remove three TX 10 screws FY Disconnect all cables and remove the 11 Receiver Mixer assembly Tools Required e TX 15 screw driver e TX 10 screw driver e 1 4 inch wrench Assembly and Disassembly Procedures A11 Receiver Mixer Removal Mi O_O EN 8 11 Assembly and Disassembly Procedures A12 Pulse Attenuator Removal 12 Pulse Attenuator Removal Done with top cover removed Remove RF cover Remove at least three RF modules Remove two TX 10 screws FY Disconnect all cables and remove 12 Tools Required e TX 15 screw driver e TX 10 screwdriver e 1 4 wrench 8 12 Assembly and Disassembly Procedures A12 Pulse Attenuator Removal PULSE SWITCH E A Assembly and Disassembly Procedures A21 GPIB Interface Removal A21 GPIB Interface Removal Done with top cover removed Remove four TX 15 power supply cover screws Remove two 7mm bolts Remove one TX 10 screws FY Disconnect ribbon cable Tools Required e TX 15 screw driver e TX 10 screw driver 7mm wrench 8 14 Assembly and Disassembly Procedures A21 GPIB Interface Removal 8 15 Assembly and Disassembly Procedures A22 Display Removal A22 Display Removal 1 Done with instrument top and bottom covers removed Do steps through 11 of the Al Front Panel removal instructions The front panel as
81. Sequence of LED Patterns 3 2 1 0 1 NS NS ONY pex O M yox 2 Assembly failure 5 3 N 7 N 1 O 29 Failures 3 2 1 0 3 2 dX 0 O E e e e e No more errors 1 The third patterns are only documented for a serial bus communication failure This is represented by the two outside LED s flashing 2 The second and third patterns will be the same It will appear as if the same pattern has flashed twice For more than one error in the Agilent 8922x the LED s will flash in the same sequence for each assembly that is faulty Where to Go Next Localizing the Problem If Power Up Checks FAILED If the LED s did not light at all go to Chapter 6 Troubleshooting the Power Supply If an error messgae occurs use it in Chapter 2 Running Diagnostics to choose which diagnostic test to run See also Chapter 11 Self Test Error Messages If this section is used due to display problems go to Chapter 5 Troubleshooting the Controller Display before the error messages are repaired Co o 868 Than the that ig A7 Controller Memory Ag Memory A AT Controller AB Mamay A1 Keyboard A21 GPIB R3 232 rial Bus Communication Soe table Al Signal Surce Analyzer Ag CRT Dive Mad Distribution A13 Audio Analyzer 1 A2 Audio Analyzer 2 Ai5 Reference A23 Input A23 Input A
82. T port of the A23 Input assembly and the level is measured Receiver This test checks the A16 Receiver assembly 15 9 Diagnostics Theory RF_DIAGS Down Converters With Spectrum Analyzer Test The RF generator is fed to the receiver IF through the A23 Input and 11 Receiver Mixer assemblies to the second mixer in the receiver The signal is measured by the spectrum analyzer at three frequencies at the SA_114 3M output IF Counter Test The signal is measured again after the third mixer and FM discriminator at the IF CNT output by the counter AGC Open Loop At AM Output Test The AGC open loop operation is checked at both high and low levels at three DAC level settings The signal is measured after the pulse detector at the DEMOD_AUD output This DC level represents the IF level AGC Closed Loop At AM Output Test The AGC loop is closed and the level at the DEMOD_AUD output is measured again with both AM and Pulse selected AGC Reference DAC Test The AGC loop is opened and the closed loop level DAC is measured by the voltmeter at the AUX7_VM output AGC Open Loop Drive DAC Test The AGC loop is opened and the open loop level DAC is measured by the voltmeter at the AUX7_VM output Temperature Test The temperature sensor is measured by the voltmeter at the AUX7_VM output AM Demodulator Test The AUDIO OUT source is routed to the MODULATION IN AM SPEECH connector externally to produce an AM signal and the demodulated AM is
83. TE Fibcaiver A26 Siap Loon AIT Slap Loon B Premod 1 4 Localizing the Problem If Power Up Happened Correctly If Power Up Happened Correctly If power up happened correctly and no problem is indicated this section is used to func tionally check most of the hardware The generators are checked first with external mea surements then the analyzers are checked with the generator The RF Generator is checked at 935 MHz and 10 dBm AF Generator is checked at 1 kHz and 1 V These checks are for indication only performance tests in Chapter 3 Verifying Performance will test specifications If you possess an Agilent 8922S or Agilent 8922M you should first re configure your instrument as an HP Agilent 8922E or HP 8922G To do this select the following keys e CONFIG this is accessible from the Cell Control screen in the bottom right hand corner Compatible select HP 8922E or HP 8922G Referring to Figure 1 4 ensure the connections are made o NS IN pe Qe J j COO AUDIO RF OUT AUDIO OUT AF To Oscilloscope RF To Spectrum Analayzer Front Panel Connections Press RF GEN RF ANL On the HP Agilent 8922A B GEN RF ANL On the HP Agile
84. Using the HP Agilent 83210A Service Kit Making Measurements This Page Intentionally Left Blank 4 8 Troubleshooting the Controller Display 5 1 Troubleshooting the Controller Display Introduction Introduction This chapter helps isolate problems in the control sections of the instrument the sections are A Keyboard 7 Controller A8 Memory e A20 CRT Driver 21 HP IB Interface e Hop Controller Problems in the Control sections can be broken into four types these types are e Parallel Bus Serial Bus e Display e Keyboard This chapter addresses each category in a separate section This chapter assumes that Chapter 13 Instrument Block Diagram will be used as a reference Troubleshooting the Controller Display Parallel Bus Parallel Bus The parallel bus is at the center of the control section The parallel bus is defined as direct connections to the A7 Controller These connections include the data bus address bus and dedicated parallel control lines The assemblies on the parallel bus are e Keyboard e Signalling Source Analyzer e 7 Controller A8 Memory e A9 Global Test Demod e A19 Measurement Board e 20 CRT Driver e 21 GPIB Interface A32 GSM Controller e A33 Hop Controller Most problems with the parallel bus are accounted for in the power up self tests The self tests check the A7 Controller first then the A8 Memory If these two tests pass the ins
85. Y DESCRIPTION Replacing a Part Replaceable Parts 492 Top Cover B E and G 505 Bottom Plate B E and G 252 240 GPIB Mounting Bracket and 241 242 Screws 244 458 Opt 001 114 Regular Mounting Bracket and 115 118 Screws Not Shown 12 CRT Bracket 426 9 21 Replacing a Part Replaceable Parts Table 9 10 Replaceable Parts Item Agilent Part CD Qty Description Mfr Code Mfr Part Number Number 21 0515 0456 3 1 SMM4 0 20MML 00000 ORDER BY DESCRIPTION 91 95 0515 1860 3 1 SCREW 1 5 FM 3 5 TX 00000 ORDER BY DESCRIPTION 96 100 3050 0227 3 5 WASHER 375 OD 00000 ORDER BY DESCRIPTION 119 08922 00014 3 1 RF COVER ON MOTHERBOARD 28480 08922 00014 120 08922 00022 3 1 MBD COVER DGTL 28480 08922 00022 121 08922 00050 7 1 COVER MTHR SYS BUS 28480 08922 00050 122 153 0515 0380 2 32 SMM4 010SEMPNTX 00000 ORDER BY DESCRIPTION 196 201 0515 0380 2 6 SMM4 010SEMPNTX 00000 ORDER BY DESCRIPTION 9 22 121 120 91 95 Screws 96 100 Washers Replacing a Part Replaceable Parts 122 153 196 201 a 119 6 21 9 23 Table 9 11 Replacing a Part Replaceable Parts Replaceable Parts Item Agilent Part CD Qty Description Number 22 23 112 113 0515 0380 2 4 5
86. am 2 RF Generator AF Generator A15 Reference The 15 Reference assembly contains the circuits necessary to generate reference signals for the other assemblies in the HP Agilent 8922 The A15 Reference assembly can be locked to an external signal of 1 2 5 10 or 13 MHz or can operate without an external reference by using its own 10 MHz TCXO An optional high stability oscillator Option 001 is available for the HP Agilent 8922 that provides a more accurate and stable reference The output from this oscillator is routed to the rear panel where it must be connected to the Reference Input for the HP Agilent 8922 to lock onto this signal The frequency of the optional high stability timebase is adjusted with a screwdriver while the standard internal Temperature Compensated Crystal Oscillator TCXO is adjusted by setting internal DAC values Both of these adjustments are thoroughly explained in chapter 7 Adjustments and Calibration If the 15 Reference assembly is replaced an error message Frequency Reference Calibration Lost will be seen during instrument power up It is necessary to perform the adjustment for the internal TCXO to remove the error message and restore calibrated operation A special feature of the 15 Reference assembly is the ability to offset all reference signals in the HP Agilent 8922 The amount of offset can be set by the user by changing the 15 Reference assembly DAC value The primary screen to cont
87. and 2 are common to all HP Agilent 8922 instruments Block Diagrams 3 and 4 illustrate hardware that is unique to the HP Agilent 8922B and HP Agilent 8922E F G H respectively Because these modules are primarily digital the discussion on this hardware is limited to a high level functional description Often troubleshooting these boards is difficult at the module level without sophisticated logic or signature analysis Module swap is the fastest way to troubleshoot hardware problems for these assemblies The final discussion focuses on the modules in Block Diagram 5 More information about troubleshooting display and controller problems is also included in chapter 5 When important the input and output specifications for most assemblies are tabulated in chapter 12 Module I O Specs For additional details on the exact signal levels and frequencies for assembly inputs and outputs refer to chapter 12 Module I O Specs 14 3 Block Diagram Theory of Operation Block Diagram 1 Block Diagram 1 RF Analyzer Audio Analyzer Spectrum Analyzer A23 Input A24 High Power Attenuator The A23 Input assembly is both the input for the RF Analyzer section and the final output from the RF Generator section Additional information on how the A23 Input assembly is used in the signal generator is covered in the Block Diagram 2 discussion The RF input signal is input to the HP Agilent 8922 using either the RF IN OUT connector for high power applications
88. and MSK Minimum Shift Keying MSK is phase modulation where the carrier is shifted or 90 degrees as each data bit is received This instantaneous phase shift causes splatter in the frequency domain and appears as noise spikes on a spectrum analyzer This is not a good system for digital communications because it would cause noise in adjacent communication channels To eliminate this noise the digital signals are first low pass filtered to eliminate the instantaneous phase shifts The filter cut off frequency chosen was 0 3 times the data rate 270 833 kHz 81 25 kHz The shape of the filter chosen was Gaussian which explains where the in 0 3 GMSK was derived The effect of the 0 3 Gaussian filter is to smooth out the sharp digital transitions and causes a more continuous phase modulation that has low spectral splatter To further reduce the frequency splattering in the frequency spectrum the digital input data is Differentially Encoded This means that the modulation either or 90 degrees is determined by examining the current data input 1 or 0 and deciding if it is the same or different than the previous data bit If the current data bit is different than the previous bit the carrier is modulated 90 degrees if the current data is the same as the previous bit the carrier is modulated 90 degrees For example a series of data 01010101 would cause the carrier to be continuously modulated 90 degrees each cl
89. assembly where the signal is translated up to the RF frequency that was selected on the front panel A26 Step Loop A This assembly creates RF reference signals from 486 6 MHz to 1016 6 MHz spaced 100 kHz apart These signals are derived from a 1 MHz output from the A15 Reference assembly and digital inputs from the A33 Hop Controller assembly The HP 8922 has the ability to change RF frequencies very quickly This is necessary because the radios and base stations change frequencies and the HP Agilent 8922 must be able to change along with them The A33 Hop Controller assembly controls which frequency the A26 Step Loop assembly will create Most radio and base station testing is done at carrier frequencies near 900 MHz For these frequencies the A26 Step Loop A assembly output is approximately 13 4 MHz lower than the RF output that was selected A26 Step Loop A and A17 Step Loop B assemblies have exactly the same hardware and can be interchanged if necessary The A25 Sum Loop assembly is adjusted to match the A22 Step Loop A assembly If either the A25 Sum Loop or A26 Step Loop assembly is changed it is necessary to readjust the A25 Sum Loop using the instructions in chapter 7 Adjustments and Calibration 14 11 Block Diagram Theory of Operation Block Diagram 2 To speed up the operation during frequency changes a Sum Loop pretune line is provided by the A26 Step Loop A assembly and drives the A25 Sum Loop assembly This pretunes th
90. ating a calibrated base station For more information on the capabilities of the HP Agilent 8922 family of test sets refer to the appropriate technical data sheets The complexity of the HP Agilent 8922 circuits combined with the convenient modular architecture allows the HP Agilent 8922 to be repaired more quickly and economically with Assembly Level Repair ALR This is the recommended repair strategy and this manual is focused to support this type of repair The block diagram discussion provides sufficient technical detail to understand the overall hardware of the HP Agilent 8922 and allows in depth troubleshooting to isolate failures to a single assembly The primary troubleshooting method for the HP Agilent 8922 is to use the memory card diagnostics supplied with this manual This section is important reading for anyone trying to understand the overall hardware of the HP Agilent 8922 and should be used as a tutorial or when the diagnostics cannot correctly locate a faulty assembly 14 2 Block Diagram Theory of Operation Technical Discussion Technical Discussion The HP Agilent 8922 can be divided into two instruments a signal generator and a signal analyzer This discussion is intended to follow the block diagrams in chapter 13 The assemblies in Block Diagrams 1 and 2 are covered first These are the primary assemblies where it is possible to do assembly level measurement and troubleshooting All the hardware in Block Diagrams 1
91. ator Loop Lock Detector State The lock detector is checked at several frequencies RF Generator Loop Output Detector The level detector is checked at several frequencies Sum Loop This test checks the A25 Sum Loop assembly RF Generator Sum Loop Lock Detector State This test checks the lock detector at several frequencies RF Generator Sum Loop VCO Tuning Level This test checks the VCO tune voltage at several frequencies Output Section This test checks the A13 Output assembly Power Supplies and Amplifier Bias The 8 Vdc supply generated by the 13 Output assembly is measured by the voltmeter at OUT_POS_8V output The 6 Vdc supply generated by the 13 Output assembly is measured by the voltmeter at the OUT_NEG_6V output The bias voltage on the output amplifier is measured by the voltmeter at the OUT_AMP_BIAS output Carrier Level DAC The carrier level DAC is checked first by turning on each bit one at a time and then with all the bits on measuring with the voltmeter at the OUT LEVEL REF output The limits are based on the value of the 6 Vdc measurement Filter Tune DAC The filter tune DAC is checked the same way the carrier level DAC is checked at the OUT_TUNE_FILTER output 15 6 Diagnostics Theory RF_DIAGS Open Loop ALC Drive This test opens the ALC loop and checks the voltage that appears on the output of the modulator with the DAC at full scale measured at the OUT_ALC_DRIVE using the voltmeter r
92. cation of LED s Front Panel View from top Ca Fl 11 x1 e e omy os e E 5 Figure 1 3 Self Test LED Location NOTE For multiple failures the patterns for each failure will appear in sequence 1 6 1 2 Localizing the Problem If Power Up Checks FAILED The following conventions are used to represent the LED s throughout this chapter LED Conventions LED Sequences LED shown in tables Represnts LED An off LED A flashing LED The LED error sequence will show two states pass or fail which are outlined below The suspect assembly is given in the following tables before moving on consult the section Self Test Diagnostic Result No Failures Detected The LED s will light for approximately 10 seconds then all will turn off 3 2 1 0 VY NY ONY NY gt gt gt Lit for 10 seconds Failure Detected 1 The LED s will initially all light 2 The next pattern blinks rapidly and shows that an assembly has failed 3 The third sequence flashes twice and gives further information on the area of the board that has failed 4 The LED s will light then go out 1 3 Localizing the Problem If Power Up Checks FAILED
93. chassis Remove the eight 2 pt Pozidriv rear panel mounting screws four on each side Remove the four TX 10 transformer mounting screws Remove the eight TX 10 connector plate mounting screws Disconnect cables from connectors J1 and J2 96 gt Carefully slide power supply away from instrument Tools Required e 15 screw driver e 10 screw driver e 2 pt Pozidriv VIEW BOTTOM VIEW 8 20 A28 Power Supply Removal Assembly and Disassembly Procedures gt M tr 542 8 oe E dere 4 7 g a c ue it 2077 4 NUNT N 4B VE 20 rez tz a Lc N Wey NA 3 e X SIDE VIEW 1 CY 8 21 Assembly and Disassembly Procedures Fan Removal Fan Removal Done with top cover removed 1 Remove four TX 15 power supply cover screws and remove cover 2 Remove four 2 pt fan mounting Pozidriv screws 3 Disconnect cable and remove fan Tools Required e TX 15 screw driver e 2 pt Pozidriv 8 22 Fan Removal Assembly and Disassembly Procedures REAR PANEL
94. crew 5 Disconnect all cabling and remove input section assembly Tools Required e TX I5 screw driver e TX 10 screw driver e 2 pt Pozidriv e 5 8 inch wrench e 1 4 wrench RIBBON 1 4 SMC CONNECTOR Ex Lis A22 Display ESN c 1 4 SMC CONNECTOR 8 ME sf _ v m J L a a B FRONT PANEL E Jas AND SIDE VIEW 4 BOTTOM VIEW Assembly and Disassembly Procedures A24 Attenuator Removal A24 Attenuator Removal Done with instrument top and bottom covers removed 1 Do steps 1 through 11 of the Al Front Panel removal instructions The front panel assembly must be separated from the main chassis Considerable pulling force is required to pull the front panel from the chassis 2 Remove two TX 15 attenuator mounting screws 3 Disconnect two RF cables 5 16 inch SMA connectors 4 Push the top of the attenuator firmly away from the CRT until it becomes free Tools Required e TX 15 screw driver e TX 10 screw driver e 2 pt Pozidriv e 5 8 inch wrench e 4 inch wrench e 5 16 inch wrench 3 5 16 SMA Assembly and Disassembly Procedures A28 Power Supply Removal A28 Power Supply Removal Done with instruments top and bottom covers removed Remove power supply cover Remove standard plate If installed remove option 001 Remove five TX 10 screws that attach power supply board to the main
95. ctrum analyzer is between 776 6 and 796 6 MHz Reduce the spectrum analyzer span to 1 MHz per division and adjust R32 again until the signal on the spectrum analyzer is centered within 2 divisions 2 MHz Some modules prefix 3050A and lower only need to be centered within 10 MHz for all of these adjustments Adjustments and Calibration Sum Loop Adjustment Procedure Second Adjustment 9 10 11 12 Now set the HP Agilent 8922 frequency to 502 MHz Set the spectrum analyzer center frequency to 488 6 MHz with a span of 10 MHz per division Adjust R180 GAIN on top of Sum Loop 25 until the signal on the spectrum analyzer is centered within 10 MHz Reduce the spectrum analyzer span to 1 MHz per division and adjust R180 again until the signal on the spectrum analyzer is centered within 2 divisions 2 MHz Final Adjustment 13 14 15 16 Set the HP Agilent 8922 frequency to 1000 MHz Set the spectrum analyzer frequency to 986 6 MHz then set the span to 10 MHz per division Adjust R160 KNEE GAIN on top of Sum Loop A25 until the signal on the spectrum analyzer is centered within 1 division 10 MHz Reduce the spectrum analyzer span to 1 MHz per division then adjust R160 again until the signal on the spectrum analyzer is centered within 2 divisions 2 MHz Final Check 17 18 Repeat the above procedures until all three adjustments pass without any further fine tuning Turn
96. e VCO in the A25 Sum Loop assembly to allow it to lock more quickly as the A26 Step Loop A and A27 DAC Upconverter assemblies change frequencies The diagnostics procedures check the A26 Step Loop A assembly at various frequencies but can only verify operation during static non hopped operations If the instrument meets its specifications during static operation but fails during frequency hopping it may be that the A25 Sum Loop or A26 Step Loop A assemblies are slow to lock up to the correct new frequency The error might appear as a high phase or frequency error at the beginning of a new frequency hop or the instrument may occasionally lose lock during a frequency hop These might be symptoms of a mis adjusted A25 Sum Loop or possibly a faulty A26 Step Loop A or A25 Sum Loop assembly A25 Sum Loop This assembly contains the circuity to add together the CW signal from the A26 Step Loop A assembly and the modulated signal from the A27 DAC Upconverter assembly A pretune line is provided from the A26 Step Loop A assembly to speed up the ability of the A25 Sum Loop A assembly to phase lock The output from this assembly is a 0 3 GMSK modulated signal at 500 to 1000 MHz depending on the frequency that was selected The A25 Sum Loop assembly is adjusted to match the tuning characteristics of the A26 Step Loop A assembly Whenever either of these two assemblies are changed it is necessary to re adjust the A25 Sum Loop assembly using the procedures in
97. e tests with titles beginning with E are for use with an HP Agilent 8922E Tests with titles beginning with G are for use with an HP Agilent 8922G Tests without an E or G prefix are used with the HP Agilent 8922F H M S The HP Agilent 8922E G DCS tests EDCSDIAG and GDCSDIAG check instruments that an HP Agilent 83220A installed The HP Agilent 8922E G GSM tests EGSMDIAG and GGSMDIAG are used for instruments without an HP Agilent 83220A installed The HP Agilent 8922F H M S diagnostic test are also in two forms checks the HP Agilent 8922F H M S The diagnostic test DCSDIAG tests either the HP Agilent 83220A or the HP Agilent 83220E which ever instrument is installed Using internal routing and generation a known bit pattern is modulated and sent to the AUX RF OUT port of either the HP Agilent 8922E F G H or the HP Agilent 83220A With an external connection made to the RF IN OUT port the instrument demodulates the signal and performs a BER measurement and DSP measurement This test provides a functional test of the assemblies that can not be checked directly as with the other diagnostic tests The assemblies checked include the A31 CODEC the A32 GSM CONTROLLER and the A34 GSM RTI The HP Agilent 83220A can be further verified for failure by disconnecting it and running the appropriate GSM test on the HP Agilent 8922E F G H M S This will show whether the instrument still fails without the HP Agilent 83220A The HP Agilent 8
98. eceiver Mixer and A16 Receiver assemblies or internal and external audio signals that pass through the A4 Modulation Distribution assembly before being routed to the A3 Audio Analyzer 1 assembly The A3 Audio Analyzer assembly either passes the signals to the A19 Measurement assembly or to the A2 Audio Analyzer 2 assembly before routing to the 19 Measurement assembly After the measurement is done the measurement numbers are sent to the A7 Controller to be sent to the display section SCOPE The oscilloscope has the AF analyzer as a front end so the routing configurations that can be done for the AF ANALYZER are also possible for oscilloscope measurements The A19 Measurement assembly makes the oscilloscope measurements After the measurement is done the measurement numbers are sent to the A7 Controller to be sent to the display section SPEC ANL e A23 Input e Receiver Mixer e A16 Receiver e A18 Spectrum Analyzer e 19 Measurement The spectrum analyzer signal receives its signal from the RF input stages after the signal is converted to a 114 3 MHz IF in the A16 Receiver assembly The A18 Spectrum Analyzer assembly works together with the A19 Measurement assembly The A18 Spectrum Analyzer receives sweep and trigger signals from the A19 Measurement assembly and returns analog level signals to the A19 Measurement assembly The A19 Measurement 16 4 Measurement Theory Introduction assembly digitizes the signals from the 18 Sp
99. ective assembly for credit With some assemblies you will receive a Memory Card that contains factory generated calibration data for the assembly There will also be an instruction sheet for loading the calibration data into the instrument after you replace the defective assembly With exchange assemblies you must return the Memory Card with the defective assembly to receive full credit Adjustments after Replacing Assemblies The following table shows which adjustments should be performed after replacing assemblies The adjustments and calibrations are described in chapter 8 Assembly Disassembly Adjustments After Replacement Assembly Calibration or Adjustment Replaced Required A3 Periodic Self Cal A4 Periodic Self Cal Al5 Timebase Adjustment standard 19 Periodic Self Cal A25 Sum Loop Adjustment A26 Step Loop Adjustment Replacing a Part Replaceable Parts Replaceable Parts The following tables and figures list part numbers for replaceable parts For more information or details of replaceable parts contact your local Agilent Technologies Sales and Service Office Table 9 2 Replacing a Part Replaceable Parts Replaceable Parts Item Agilent Part Number Al 08920 60201 1250 1811 W31 08922 61037 W31 08922 61085 08922 00009 08922 00079 08922 00053 08922 21002 08922 40002 08922 40003 11 0515 2126 27 30 0515 0380 31 2950 0196 32 33 2950 0054 34 089
100. ectrum Analyzer assembly After the measurement is done the measurement numbers are sent to the A7 Controller to be sent to the display section 16 5 Measurement Theory Introduction This Page Intentionally Left Blank 16 6 17 GSM Theory 17 1 GSM Theory Introduction Introduction The HP Agilent 8922 product family is designed to measure and generate signals for the GSM digital cellular telephone system The HP Agilent 8922 is both a signal generator and a measuring receiver This chapter describes GSM system signals that are generated and received by the HP Agilent 8922 The GSM system is not described in detail due to complexity This chapter is intended only to describe the system as it relates to servicing the HP Agilent 8922 meaning the need to know the character of the signals generated and received 17 2 GSM Theory The GSM System The GSM System The GSM system uses two frequency bands ranging from 890 to 915 MHz and 935 to 960 MHz The bands are broken into 125 channels spaced 200 kHz apart The GSM system uses one band to transmit and one to receive The lower frequency band 890 915 MHz is used for the Mobile telephone to Base station link the upper band is for Base to Mobile Channels from each band are used in uplink downlink channel pairs The channels in the channel pair are spaced 45 MHz apart The GSM system is time multiplexed meaning that it is pulsed to allow multiple users access to the
101. eferenced to the 6 Vdc measurement Output Detector Detector Caps The output capacitors are switched in and out and the output level is measured by the voltmeter at the OUT OUTPUT LEVEL output Output Detector Low Level When the carrier level DAC is set to 0 there should be no RF output detected by the voltmeter measuring at the OUT OUTPUT LEVEL output Output Frequency Range Loop Closed The frequency is varied and the detector voltage is measured by the voltmeter at the OUT OUTPUT LEVEL output Bandwidth Control The bandwidth control bits are varied and the detected output is measured by the voltmeter at the OUT OUTPUT LEVEL output Tracking Filter Rejection The ALC loop is opened and the tracking filters are checked by setting the RF frequency to the center of the two bands while changing the filter DAC to below the RF frequency and measuring the detected level with the voltmeter at the OUT OUTPUT LEVEL output Pulse Attenuator and Drive This test checks the A14 Pulse Driver assembly Pulse Attenuator and Drive Test A reference measurement is made and the signal is pulsed using the front panel AUDIO OUT to drive the front panel MODULATION IN PULSE input 13 MHz Oscillator Lock Detector The 13 MHz VCO lock detector is measured to check the 13 MHz VCO Input Section This test checks the A23 Input assembly 15 7 Diagnostics Theory RF_DIAGS RF Detectors 1 The low and high sensitivity detectors are checked both wit
102. er 9 8 theory 14 4 14 13 A24 Attenuator Removal 8 19 A25 part location 9 9 part number 9 8 Service Kit 4 5 specs 12 50 theory 14 12 A25 Sum Loop diagnostics 15 6 A26 part location 9 9 part number 9 8 Service Kit 4 5 theory 14 11 A26 Step Loop A diagnostics 15 6 27 9 9 1 Index part number 9 8 Service Kit 4 5 specs 12 56 theory 14 11 A27 DAC Upconverter diagnostics 15 5 A28 part location 9 9 part number 9 8 9 10 specs 12 58 A28 Power Supply Removal 8 20 A29 part location 9 13 part number 9 12 A3 part number 9 6 Service Kit 4 5 specs 12 5 theory 14 7 Audio Analyzer 1 diagnostics 15 4 A31 part location 9 13 part number 9 12 theory 14 17 A32 part location 9 13 part number 9 12 theory 14 17 A33 part location 9 13 part number 9 12 Service Kit 4 5 specs 12 59 theory 14 18 A34 part location 9 13 part number 9 12 theory 14 17 A35 part location 9 13 part number 9 12 theory 14 15 14 17 A36 part location 9 13 part number 9 12 theory 14 15 14 16 A37 Index 2 part location 9 13 part number 9 12 A38 part location 9 13 part number 9 12 4 part location 9 7 part number 9 6 Service Kit 4 5 specs 12 8 theory 14 14 A4 Modulation Distribution diagnostics 15 3 5 part location 9 7 part number 9 6 Service Kit 4 5 specs 12 10 theory 14 9 AS Premod Filter and NSM diagnostics 15 5 6 part
103. er Supplies 15 7112 J2 20 TP2 15mA 15 31011 J2 23 24 5 11 15 16 12 23 34 5 1019 Ground J1 2 4 6 10 13 14 17 18 20 21 23 40 J2 2 4 17 18 21 22 25 26 28 32 34 37 Inputs From A34 GSM RTI Assembly PMF CLK J1 5 Level TTL Frequency 270 833 2 kHz Clock signal input is a square wave of duty cycle 50 and approximately 4 4Vp p when measured on an oscilloscope To view on a spectrum analyzer set centre frequency to 270 kHz and span to 540 KHz the peak marker should read approximately 12dBm 12 10 Module I O Specifications 5 Premodulation Filter and NSM From A34 GSM RTI Assembly PMF DATA 1 1 Level TTL Rate 270 833 kbps Format Non differential data encoded The PMF DATA signal is difficult to measure accurately without a high speed oscilloscope or logic analyzer Using a Spectrum Analyzer an increased noise floor can be seen when probed about the centre frequency of 270 kHz Using an oscilloscope the signal can be measured at 4 4 Vp p On a DVM 2 25 Vdc From A15 Reference GSM RTI Assembly 10 MHz Ref B J2 33 Frequency Wave Shape Level Harmonics The 10 MHz Reference signal be measured on an oscilloscope at 880 mV ms and 2 6 Vp p On a Spectrum Analyzer the marker will be approximately 10dBm NOTE The Premodulation Filter and NSM assembly are used to convert User Digital
104. er supply is defective refer to chapter 8 Assembly Disassembly and chapter 9 Replacing a Part for removal and replacement After the power supply is repaired go to chapter 1 Localizing the Problem to verify that no other problems exist Adjustments and Calibration 7 1 Adjustments and Calibration Introduction Introduction This chapter contains information to perform the necessary calibrations and adjustments for periodic maintenance or following repairs Each year the timebase and periodic calibration adjustments should be performed Also the overall performance of the instrument should be verified each year with the automated performance tests in chapter 3 Running Performance Tests The calibrations and adjustments covered in this chapter are divided into three sections CJ Timebase Adjustments Standard Timebase e Optional High Stability Timebase J Periodic Calibrations ROM based e Voltmeter Reference Audio Frequency Generator Gain e External Modulation Path Gain e Audio Analyzer 1 Offset Sum Loop Adjustment Procedure Adjustments and Calibration Timebase Adjustments Timebase Adjustments Standard Timebase Adjustment Procedure Reference Calibration NOTE This procedure should only be performed after the instrument has warmed up at least 30 minutes It should be performed after replacement of the reference section A15 or if the instrument gives an error message Frequency refere
105. ge 2 t 10 V Full 8 Bits Sample Rate 10 Mega Samples S in bursts Max Input Voltage 10 0 V 3 dB Bandwidth 500 kHz 12 40 Counter Inputs Module I O Specifications A19 Measurement AUDIOI CNT J1 6 FM Audio Analyzer 1 A3 CNT J1 8 IN CNT J1 5 From Input Section A23 J1 9 From Global Board A9 TIME BASE REF 20 MHz J3 29 MIXED Internal STRIG Internal GND Internal 20 MHz Time Base Standard The 20 MHz Sine wave drives a divide by 2 circuit which provides the 10 MHz reference for the counter Input Impedance 500 Input Level gt 5 dBm Sinewave 2nd Harmonics lt 25 dBc IN Input module prescaler count signal Input Z 2 35 1 uF AC Coupling Minimum input 100 mV Peak Freq Range 10 kHz to 4 MHz IF_CNT Receiver Module I F Count Input Z 2 35 100 pF AC Coupling Minimum input 100 mV Peak Freq 10 7 MHz AUD1_CNT HCMOS Vih gt 4V Vil lt 1V RI CNT HCMOS Vih gt 4 Vil lt 1 V Maximum Count Time 25 6 uS x 216 1 6777216 S Minimum Count Time 25 6 uS Count time step size 25 6 uS Accuracy same as 10 MHz Ref Gate Time Jitter lt 10nS 100 mV Input Resolution 0 01 ppm gate time 12 41 Module I O Specifications A19 Measurement Trigger Input Scope Trigger Internal SIGN_SCP_TRIG J1 10 RI SCP TRIG J1 7 EXT TRIG J1 4 INTERNAL TRIGGER Internal Trigger Logic SIGN 5 T
106. gnals are generated internally in other modules it may be 14 10 IMPORTANT Block Diagram Theory of Operation Block Diagram 2 necessary to do manual troubleshooting to find out if the 5 Premod Filter and NSM assembly is correctly locking to these other clock signals By using the service screen and viewing the latch NSM PMF it can be determined if the loop is locked 1 on the latch indicates lock while a 0 indicates no lock If for some reason the loop is not locked the generator will exhibit a high frequency and phase error A27 DAC Upconverter This assembly contains the circuits necessary to create a 0 3 GMSK waveform at 13 4 MHz The inputs to this module are the digital signals from the A5 Premod Filter and NSM assembly as well as a 10 MHz reference signal from the A15 Reference assembly These two are combined together as shown in Block Diagram 2 to produce the output signal at 13 4 MHz An important characteristic of this signal is extremely low phase and frequency error The output from this module can be accessed using the extender boards in the service kit and measured with either another HP Agilent 8922 or a downconverter and HP Agilent 11836A software The HP Agilent 11836A software method is recommended if it is necessary to have a highly accurate measurement The diagnostics procedure for this module only checks that an RF signal is present on the output This output is fed into the A25 Sum Loop
107. gram 4 14 17 Block Diagram5 14 18 15 Diagnostics Theory Introduction 15 2 AF_DIAGS 15 3 RF_DIAGS 15 5 MS_DIAGS 15 11 GSM and DCS Diagnostic Tests 15 12 Interpreting Results 15 13 Contents 4 Contents 16 Measurement Theory Introduction 16 2 17 GSM Theory Introduction 17 2 The GSM System 17 3 E GSM DCS1800 and PCS1900 Systems 17 4 Index 1 Contents 5 Contents This Page Intentionally Left Blank Contents 6 Localizing the Problem Localizing the Problem Introduction Introduction This chapter helps to determine if a problem actually exists and which section of the instrument has a problem This chapter comprises of four sections O Localizing the Problem Flow Chart Power Up O Power Up Checks O If Power Up Failed e Power Up Self Test Diagnostics O If Power Up Happened Correctly e Checking the RF Analyzer using the RF Generator e Checking the RF Analyzer using the AF Generator Localizing the Problem Localizing the Problem Flow Chart Power Up Localizing the Problem Flow Chart Power Up See Power Up Checks in this Chapter for details of the steps given in the flow chart Goto Troubleshooting the Power Supply Beep after 6 seconds Goto Power Up Self Test Messages Diagnostics OK Keys amp Controls OK Goto If Power Up Happened Correctly Reported by Diagnostics Goto the relevant trouble shooting section
108. h and without a signal present Step Attenuator The step attenuator is checked by switching in one pad at a time RF Detectors 2 The filter output detector is checked with no signal present Filter Output Detector Signal Present The filter output detector is checked with a signal present at different frequencies Output Filter Rejection Each filter is checked to see that it rejects frequencies outside its passband Output Variable Attenuator The variable attenuator is checked by programming the DAC to full scale then reading the voltage on the output detector Then the DAC is programmed to values which turn on the 5 most significant bits one at a time starting with the MSB and measuring the detector output each time Autorange Attenuator The autorange attenuator is programmed to each of its possible values and the output detector is measured each time Counter With TTL Dividers The signal from the RF generator is routed to the counter TTL prescalers The frequency of the signal is set to all values between 10 and 250 MHz in 5 MHz steps Counter With ECL Dividers The signal from the RF generator is routed to the counter ECL prescalers The frequency of the signal is set to all values between 50 and 1000 MHz in 50 MHz steps Temperature Sensor The temperature sensor produces a DC voltage proportional to the internal temperature RF Analyzer Step Loop This test checks the A17 Step Loop B assembly 15 8 Diagnostics
109. he Choices menu Select RUN TEST Sos 135 Se qe om Follow the instructions on the screen Adjustments and Calibration Sum Loop Adjustment Procedure Sum Loop Adjustment Procedure This procedure should be performed whenever Step Loop A Assembly A26 or Sum Loop Assembly A25 is replaced It is not necessary to perform this adjustment for a periodic calibration A spectrum analyzer is required to measure the instrument s output during these procedures It is recommended to use a synthesized spectrum analyzer if possible Procedure 1 2 Fir 5 Turn off the HP Agilent 8922 Remove the instrument top cover and the DAC Upconverter Module A27 It is necessary to remove the RF Cover plate that holds the module in the instrument Power up the instrument select the RF GENERATOR RF ANALYZER screen and set the RF Gen Amplitude to 20 dBm at the RF IN OUT connector Prepare the spectrum analyzer Set the reference level to 10 dBm Connect the Agilent 8922 RF IN OUT to the spectrum analyzer input st Adjustment Again from the RF GENERATOR screen set the HP Agilent 8922 frequency to 800 MHz Set the spectrum analyzer center frequency to 786 6 MHz The output from the HP Agilent 8922 is 13 4 MHz lower than was entered because the DAC Upconverter is gone Set the spectrum analyzer span to 10 MHz per division ADJUST R32 OFFSET on top of Sum Loop 25 until the signal the spe
110. he Power Supply Chapter 6 If the fan started but any of the other power up checks failed see Power Up Self Test Diagnostics If an error message occurs refer to the Agilent 8922x Users Guide for additional information Error Message Numbers If the error message refers to a self test error it will be of the form One or more self tests failed Error Code Where xxxx corresponds to the error message number shown in the table below Error Message Numbers Failure Fatal Error Host Processor Failure Fatal Error ROM Checksum Failure Fatal Error RAM Failure Fatal Error RAM Failure Fatal Error Timer Failure Real Time Clock Failure Keyboard Failure Serial I O Failure Internal Serial Bus Communication Failure CRT Failure Miscellaneous Hardware Failure Error Number 0002 A7 Controller 0004 8 Memory 0008 8 Memory Suspect Assembly 1 Localizing the Problem If Power Up Checks FAILED Power Up Self Test Diagnostics If the power up sequence failed the power up self tests can be re run with the covers off LED s on the controller board give the results of the power up self test a Removethe instrument covers Refer to the section Top and Bottom Covers Chapter 8 for details b Power up theinstrument c ReadtheLED sequence given on the controller board These LED s can be read with the shields in place refer to the diagram below Lo
111. he modules that are primarily digital and are used to generate the digital information and control signals required to set up a call with a GSM mobile radio These are not found in the the HP Agilent 8922A or B Block Diagram 5 Block Diagram 5 is an overall block diagram It illustrates the interconnecting control signals and busses between the modules This block diagram also shows detailed pin labels for the A19 Measurement board and A33 Hop Controller The 19 board measures voltages and frequencies from most of the analog modules It is the primary tool used for the internal diagnostic measurements and many other measurements The A33 Hop Controller contains the circuits that communicate with the analog analyzer and generator modules 13 3 Instrument Block Diagrams Introduction This Page Intentionally Left Blank 13 4 14 Block Diagram Theory of Operation 14 1 Block Diagram Theory of Operation Introduction Introduction The HP Agilent 8922 is a specialized instrument designed to test GSM and PCN mobile radios and base station transmitters The HP Agilent 8922A contains the analog audio and RF hardware necessary to generate 0 3 Gaussian Minimum Shift Key GMSK signals Digital hardware has been added to the HP Agilent 8922B to allow it to buffer digital data from a computer and properly format it for the GSM protocol The HP Agilent 8922E F G H M S adds complete digital control and allows it to test a mobile radio by simul
112. he self tests are run on power up This list does not include all of the messages that can appear under all circumstances Battery Backed RAM Initialized Structures corrupt Battery Backed RAM Initialized Option RAM not maintained Battery Backed RAM Initialized Optional RAM not found Battery Backed RAM Initialized Standard RAM not maintained host processor self tests passed PANIC UNKNOWN ERROR OCCURRED Attempt to write EEPROM failed Communication failure with the Step Loop Board A serial communications failure occurred with the 17 Step Loop assembly Communication failure with the Sig Gen Step Loop Board A serial communications failure occurred with the A26 Step Loop A assembly Communication failure with the NSM PMF Board A serial communications failure occurred with the 5 Premod Filter and NSM assembly Controller communication channel Failure Self test failure in Hop Controller The A33 Hop Controller assembly failed its self test Controller did not post self test results DSP Analyzer communication Channel Failure Self test failure in DSP Analyzer The A9 Global Test and Demod assembly failed its self test DSP Analyzer did not post self test results Protocol Processor Communication Channel Failure Self test failure in Protocol Processor The A32 GSM Controller assembly failed its self test 12 Module I O Specifications
113. ion data 8 2 Calibration Lost 14 9 calibrations 7 2 Carrier Level DAC theory 15 6 CODEC Assembly theory 14 17 Controller Service Kit 4 5 troubleshooting 5 2 controller theory 14 18 counter theory 14 18 Counter With ECL Dividers theory 15 8 Counter With TTL Dividers theory 15 8 CRT Driver troubleshooting 5 2 CRT Drives Service Kit 4 5 CW MEAS AF ANALYZER 16 4 CW MEAS AF ANL theory 16 2 D DAC and Up Converter theory 15 5 DAC Upconverter Service Kit 4 5 specs 12 56 theory 14 11 DCS1800 17 4 DCS1900 17 4 Detector Output theory 15 9 Detector Output Level theory 15 5 Differentially Encoded theory 14 10 Display troubleshooting 5 2 5 5 Down Converters With Spectrum Analyzer Test theory 15 10 DSP ANL theory 14 6 16 2 16 3 E E GSM 17 4 error message 14 9 error messages 11 2 Ext Reference Lock Detector theory 15 11 Ext Reference Present Detector theory 15 11 External Reference theory 15 11 F FIFO GPIO theory 14 15 Filter Output Detector Signal Present theory 15 8 Filter Rejection theory 15 9 Filter Tune DAC theory 15 6 Firmware Location 9 29 Flash Upgrades 9 29 FM Demodulator Test theory 15 10 Frequency Reference 14 9 fuse 6 5 fuse board 6 7 fuseboard 6 7 G Global Test and Demod Service Kit 4 5 specs 12 15 theory 14 6 GMSK 14 2 theory 14 6 14 9 GPIB Interface troubleshooting 5 2 GSM 14 2 theory 17 2 GSM Controller theory
114. k and data signals which are normally routed from the front panel are now received from the A36 FIFO GPIO assembly with the clock and data all properly synchronized The pulse modulation and frequency hop information from the external computer is stored in the A37 Sequence Controller assembly where it is synchronized and routed to the signal generator portion of the HP Agilent 8922B to be transmitted Like the A36 FIFO GPIO assembly the HP Agilent 8922B software also contains a Frame Control RAM test and a HOP RAM test to verify the ability of the external computer to read and write to the A37 Sequence Controller assembly 14 16 Block Diagram Theory of Operation Block Diagram 4 Block Diagram 4 This block diagram illustrates the assemblies that are unique to the HP Agilent 8922E F G H These modules are primarily digital and represent the hardware necessary to create the digital protocol to set up and maintain a phone call with a GSM mobile phone A special diagnostics loopback program is included on the diagnostic memory card This program causes the HP Agilent 8922E F G H to set up a phone call to itself loopback and measure the bit error rate This exercises most of the digital hardware and gives a high confidence that the A31 CODEC A32 GSM Controller and A34 GSM RTI assemblies are operating correctly A31 CODEC A232 GSM Controller A34 GSM RTI The A31 CODEC assembly provides the speech processing coding and decoding
115. l 27 5 dBm Amplitude To A12 Pulse Attenuator ATTEN SELECT P1 11 13 15 17 20 Level Pin 20 5 vdc Pins 11 17 12 Vdc 12 25 From Rear Panel From A14 Pulse Driver Module I O Specifications A15 Reference 15 Reference Use extender card 08922 60129 Use coax jumpers on Plug 1 pins 3 9 13 and 17 Plug 3 pins 9 13 and 17 Power Supplies 15V 120 90 mA 15 J2 3 45V J2 4 Ground J3 3 6 8 10 12 14 16 18 19 J1 1 2 4 8 10 12 14 16 18 20 Inputs EX REF IN J1 9 Frequency 1 2 5 10 or 13 MHz 5 ppm to phase lock 1 ppm for accurate global phase measurements Nominal Impedance 500 Signal Level Between 2 5 dBm and 23 dBm Max DC voltage 15 13M OUT LOCK J2 7 High Level PLL 15 locked PLL is unlocked To test check for presence of 13 MHz out on BNC Rear Panel 12 26 Hop Control To A33 Hop Controller J2 5 8 9 Levels Clock Rate 180 kHz bursts Amplitude 5 Outputs To Rear Panel EX 10M REF OUT J1 13 Waveshape Sine Harmonics 25 dBc Signal Level 247 5 dBm Spurious at gt 5 kHz offsets lt 110 dBc Nominal Output Impedance 500 A26 Step Loop 1 P3 4 Frequency 1 MHz 5 Hz Levels CMOS Duty Cycle 800 ns high 200 ns low Amplitude 4 Vdc Waveshape square wave not a true square wave Duty Cycle 80 To 17 S
116. l Test and Demod Figure 4 8 To Front Panel NOTE UNMUTED FM J1 14 Sensitivity into gt 100 k Q load 20 uV Hz See Figure 4 8 on Max Deviation 100 kHz peak page 12 33 Amplitude 1 8 Vdc T i 1 FRE um tf af BEL JEI 1 L W En 1 1 1 50 0009 us a us Typical Display PULSE DEMOD J1 7 Level Pulse ON into open circuit 2 Level Pulse OFF OV Output Impedance 600 Q 10 90 Rise Fall time 2 5 us To test Pulse Demod apply RF Carrier with AM modulation to RF Input measure Pulse Demod Out on oscilloscope 180 mV x Ensure correct settings on RF Analyzer page frequency amplitude If the RF Input level is greater than 5 dBm below RF Analyzer setting the measurement will not register 12 33 To Front Panel NOTE To A3 Audio Analyzer Module Specifications A16 Receiver FM_DEMOD J1 13 Sensitivity into open circuit Output Impedance Max Deviation Accuracy DC to 270 kHz Sensitivity into oscilloscope To test FM Demod apply RF Carrier with FM modulation to RF Input measure FM Demod on oscilloscope Ensure correct settings on RF Analyzer page frequency amplitude If the RF Input level is greater than 5 dBm below R
117. l if oscilloscope or spectrum analyzer do not show a signal 12 21 Module I O Specifications A13 Output A13 Output Use extender card 08922 90129 Use coax jumpers on Plug 1 pins 3 17 and Plug 3 pin 13 Power Supplies 5 50 12 12V eo 38 J2 1 71 1 2 4 5 6 7 8 9 10 11 12 13 14 15 16 18 19 20 J3 1 2 3 4 5 6 7 8 9 10 11 12 14 15 16 17 18 19 20 Inputs2 From Sum Loop A25 Change frequency on RF Generator page Coax jumper connection SGS 500 10000M J1 17 Freq Range 480 1015 MHz Input Level required 0 dBm 2 dB Spectral Purity required Harmonics 2nd lt 10 dBc 3rd 5th lt 15 dBc Spurs 70 dBc From A15 Reference Assembly Coax jumper connection OUT 1G REF J1 3 Input Level 1 dBm 3 dB Harmonics 10 dBc Spurs 80 dBc 5 kHz offsets 500 1500 MHz 40 dBc 500 MHz and 1500 MHz OUT 1G REF only present for RF Generator frequencies from 0 to 291 MHz used for frequency translation 12 22 From 4 Modulation Distribution To 12 Pulse Attenuator Module I O Specifications A13 Output MOD J2 7 Input Z 25kQ 5000 pF parallel shunt _ See 4 Modulation Distribution page 12 8 for measurement procedure Outputs Coax jumper connection MAIN_RF_OUT J3 13 Freq Main Band 501 to 1000 MHz Divide Band 249 to 500 MHz Heterodyne Band 0 25 to 248 9999999
118. litude 4 V ans 12 Vp p From A26 Step Loop A SUM_LP_PTUNE J2 7 Voltage 12 to 12 Vdc measured spectrum analyzer 0 3 dBm at RF Generator frequency 12 50 Module I O Specifications A25 Sum Loop From A26 Step Loop A STEP LP J3 17 Frequency 486 1015 MHz Resolution 100 kHz Level 3 dB 3 dB on spectrum analyzer Waveshape sine If difficulty is found measuring STEP_LP_OUT set RF Generator to 250 MHz and use oscilloscope settings from list shown below Channel 1 200 0 mvolts div Offset 24 00 mvolts Trigger mode Edge on negative edge on Chan2 Timebase 500 ps div Delay 0 0000 Trigger Levels Ch 1 Parameters P P Volts 1 1 volts Chan1 24 00 mvolts Rise Time 590 ps Fall Time 620 ps Holdoff 70 000 ns Frequency 483 092 MHz Period 2 070 ns Width 1 060 ns Width 1 010 ns Overshoot 0 0000 mvolts Preshoot 12 50 mvolts RMS Volts 1 617 volts Duty Cycle 51 20 Outputs To A26 Step Loop A SUM_LOCK J2 1 Level TTL High Out of Lock High Typically 7 Vdc Low Typically lt 0 3 Vdc 19 Measurement Board AUX3_VM J2 6 Level 5 V to 5 12 51 Module Specifications A25 Sum Loop To A13 Output SGS 500 1000M J1 3 Frequency 500 to 1015 MHz Level 0 dBm 2 dB Harmonics Spurious gt 5 kHz offset Change frequency on RF Generator page Select modulation types on or off On spectr
119. lock to most common reference frequencies used for GSM radio testing These include 1 2 5 10 and 13 MHz as well as 270 833 kHz data rate clock and 216 667 kHz frame rate clock The frequency must be selected using the software provided with the HP Agilent 8922B This module provides a 10 MHz signal to the rear panel and a 270 833 kHz signal to the A37 Sequence Controller assembly A36 FIFO GPIO The A36 FIFO GPIO assembly has 2 primary functions The first is to communicate through the GPIO bus to an external controller and relay these control signals to the other HP Agilent 8922B modules To control any of the HP Agilent 8922B modules it is necessary that the A36 FIFO GPIO assembly communications are working correctly The second function of the A36 FIFO GPIO assembly is to store and send the digital data information that is transmitted by the RF Generator portion of the HP Agilent 8922 The diagnostic software has a FIFO RAM test to verify that the hardware can send and receive data from the external computer 14 15 Block Diagram Theory of Operation Block Diagram 3 HP Agilent 8922B Only A37 Sequence Controller The A37 Sequence Controller assembly contains the switches which cause an HP Agilent 8922B to function like an HP Agilent 8922B instead of an HP Agilent 8922A Activating the switches causes the Clock Data Pulse Modulation and Frequency Hop data to be generated using the HP Agilent 8922B modules The 270 833 kHz cloc
120. lowest frequency from available range to compensate for digital oscilloscope frequency range to measure higher RF frequencies select 380 8 MHz from RF analyzer page This uses 495 1 MHz from step loop and 114 3 MHz IF Step Loop A A26 Levels same as Step Loop B except for set frequency on RF Generator page To obtain lowest frequency at step loop A output set to 249 1 MHz 12 54 Module I O Specifications A17 A26 Step Loop 19 Measurement Board AUXI 2 VM J2 6 Voltage Range 5 V to 5 V typically 5 Vdc for default Preset settings 12 55 Module Specifications A27 DAC Upconverter A27 DAC Upconverter Use extender card 08922 60129 Use coax jumpers on Plug 1 pins 7 9 and 13 Plug 3 pin 15 Power Supplies 15 20 15 V 12 3 5 V J2 4 5 V Ground J1 1 3 4 17 18 20 J3 1 4 6 14 16 20 Inputs From A5 Premod Filter and NSM NSM_IF_CLK J1 2 Frequency 17 3333 MHz 250 Hz Level TTL See A5 Premodulation Filter and NSM page 12 10 for measurement procedure NSM_IF_DATA J1 5 16 Level TTL The NSM_IF_DATA can be probed on SMC connectors Plug 1 pins 7 9 and 13 The NSM Data Stream is difficult to measure on a digital oscilloscope The Table shown are typical settings for an oscilloscope To obtain a reading the display persistance must be increased Typically 1 bit of the data stream will be 60 ns 12 5
121. ly controls which frequency the 17 Step Loop assembly will create Most radio and base station testing is done at carrier frequencies near 900 MHz For these frequencies A17 STEP LOOP is approximately 114 3 MHz lower than the RF input signal that was entered Unlike some RF analyzers the HP Agilent 8922 cannot automatically tune to the RF input signal This information must be entered for the 8922 to set up the proper filters and LO frequencies A26 Step Loop A assembly and A17 Step Loop B assembly have exactly the same hardware and can be interchanged if necessary IMPORTANT The A25 Sum Loop assembly is adjusted to match the Step Loop A assembly If either the A25 Sum Loop or A26 Step Loop A assembly is changed it is necessary to readjust the A25 Sum Loop assembly using the instructions in chapter 7 section of this manual Early versions of the HP Agilent 8922 provided the 17 Step Loop assembly output to the rear panel which was then normally routed back into the instrument using an external coax cable Newer instruments now route the signal directly from the 17 Step Loop assembly to the 11 Receiver Mixer assembly The diagnostic procedures check the 17 Step Loop assembly at various frequencies but can only verify operation during static non hopped operations If the instrument meets its specifications during static operation but fails during frequency hopping it may be that the 17 Step Loop assembly is slow to
122. ly seen on a spectrum analyzer Expected Display Channel 1 200 0 mvolts div Timebase 10 0 ns div Ch 1 Parameters Rise Time 14 810 ns Frequency 20 2347 MHz Width 25 510 ns Overshoot 0 0000 mvolts RMS Volts 290 6 mvolts Offset 24 00 volts Trigger mode Edge on positive edge on Chan1 Delay 0 0000 Trigger Levels P P Volts 887 5 volts Chan1 24 00 mvolts Fall Time 16 770 ns Holdoff 70 000 ns Period 49 420 ns Width 23 880 ns Preshoot 50 00 mvolts Duty Cycle 51 67 12 17 Module Specifications 9 Global Test and Demod Output to Rear Panel System Bus Figure 4 4 J1 21 Waveshape Sine Levels 100 mV minimum 5 dBm Frequency 700 kHz To set up this signal for measuring follow the same procedure as for 10 7M_IF J1 7 page 12 15 by running the RF Diagnostics The signal can be seen on a spectrum analyzer or measured on an oscilloscope see Figure 4 4 on page 12 18 for a typical reading Se Se T i H H E i i i ea H 1 1 i i i E H i MESES TNI i M ul cem Es SE eee i i i i i T i 1 H B i TS pese sees ee j i 3 H be rp DP ole X i i mpm gm V EMEN MIGNE T 1 1
123. mal shutdown capability O Two supply short protection shorting 25 unregulated is protected only by fuse O Fan turns off with power down O Fan speed is a function of temperature Outputs Supply Tolerance limit Max CW Total noise 20 Noise nV VHz Voltage incl load Ripple RMS Spur RMS Hz 20 MHz 6920 kHz 38 V 196 3A mV 1 400 15 1 26 1 mV 1 uV mV 150 5 2 V 4 3 0A 1 mV 1 lmV 50 25 Unreg 10 60 fuse 1V 21 1 1 Three terminal regulator a This is the spec for rates greater than 60 kHz For rates less then 60 kHz the spec increases by 6 dB per octave until we reach a maximim of 100 at rates less than 600 Hz 12 58 Module I O Specifications A33 Hop Controller A33 Hop Controller Power Supplies 15 J21 100 5mA 15 V J21 40 59 60 61 91 92 0 mA not used 5 J21 99 J2 1 1A Ground J21 17 18 42 43 56 69 87 93 94 Inputs Hop Control Input Bus HOP ADDR J21 5 15 Amplitude TTL levels High drive requirement 100 WA Low drive requirement 1 mA Format unsigned binary high 1 From Rear Panel TX HOP J21 4 Amplitude TTL levels High drive requirement 100 uA Low drive requirement 2mA Triggered by Rising edge 12 59 From Rear Panel From Rear Panel From Rear Panel Module I O Specifications A33 Hop Controller Amplitude High drive requirement RX_H
124. measured at the DEMOD AUD output by the voltmeter through the A3 Audio Analyzer 1 assembly FM Demodulator Test The FM demodulator is measured statically by changing the RF generator frequency by a small amount and measuring the DC voltage change at the output of the FM demodulator at the DEMOD AUD output by the voltmeter through the Audio Analyzer 1 assembly 15 10 Diagnostics Theory MS_DIAGS MS_DIAGS External Reference Ext Reference Present Detector The external reference detector is read Ext Reference Lock Detector The 10 MHz loop lock detector is read Ext Reference Lock Out the external reference lock out is checked by locking out the external reference and checking the external reference lock detector RF Input Output RF In Out to Aux RF Out Test Using an external connection the power is measured using the CW AF Analyzer Aux RF Out to Aux RF In Using an external connection the filter output detector level is measured by the voltmeter through the voltmeter multiplexer Instrument Self Test The power up self tests are invoked internally Power Supplies On Measurement Board The power supply sense points on the 19 Measurement assembly are read 15 11 Diagnostics Theory GSM and DCS Diagnostic Tests GSM and DCS Diagnostic Tests Each of these tests performs a functional check on the instrument by generating a test signal and looping the signal back to the measurement hardware Th
125. measurements digitally analyze the signal under test The signal is leveled and converted to a 10 7 MHz IF and routed to the A9 Global Test and Demod assembly where the signal is digitized and the actual measurements are made After the measurement is done the measurement numbers are sent to the A7 Controller to be sent to the display section OUT RF SP e A23 Input 11 Receiver Mixer e A16 Receiver e A18 Spectrum Analyzer e 19 Measurement The output RF spectrum is GSM required measurement that is zero span spectrum analyzer measurement at specific offsets from the carrier frequency Refer also to the SPEC ANL description PULSE A23 Input e 11 Receiver Mixer e A16 Receiver e AI8 Spectrum Analyzer e A19 Measurement The pulse measurement is used to measure the 70 dB point of a GSM pulse because the DSP analyzer will only measure to 30 dB This is a spectrum analyzer measurement Refer also to the SPEC ANL description 16 3 Measurement Theory Introduction CW MEAS AF ANALYZER e A23 Input e 19 Measurement e 11 Receiver Mixer e A16 Receiver e Audio Analyzer 1 e 2 Audio Analyzer 2 e 4 Modulation Distribution The CW measurements are power and frequency For the power measurement the detector is in the A23 Input assembly and is measured by the voltmeter in the A19 Measurement assembly The AF analyzer measurements are either demodulated signals that pass through the A23 Input A11 R
126. mory card revision ROM based diagnostic test names may differ from the names used in this chapter Running Diagnostics Running Memory Card or ROM Based Diagnostics Running Memory Card or ROM Based Diagnostics Do these steps in the order shown 1 Press 3 Press oog o6 2 Insert Memory Card Optional Running Diagnostics Running Memory Card or ROM Based Diagnostics 4 For Memory Cards 6 Move cursor here and press knob If CARD is displayed go to step 6 if not move the cur sor to this field press knob and continue at step 5 sont inuous Singl Lant 1 hue TESTS Location Library Program Autostart i SEE 8 Move cursor here and press knob Follow the Lontinue Comment instructions to start Edit Sean Edit Porn Test Execution Conditions Edit Spec On UUT Failure Run Mode Select CARD Qutput Results Qutput Destination Foilures 7 Select To Screen Qutput Headina PHASE FRG AF_DIAGS RAMP DIAGSI ep MS DIAGSI Test Function CAL REV LOOP BACK To select another test To select another tests from the same program use the RESUME user key To select a test from another program press TESTS key and begin at step 6 2 4 Reading Memory Card Diagnostic Test Results Test Res
127. n be made without completing these steps 12 Remove 15 5 8 inch hex nuts 13 Pull front panel assembly away from chassis until speaker assembly is visible Remove 3 TX 10 mounting screws and disconnect the speaker cable from J7 on motherboard Tools Required TX 15 screw driver TX 10 screw driver 2 pt Pozidriv 5 8 inch wrench 1 4 inch wrench Assembly and Disassembly Procedures 1 Front Panel Removal 7 11 A1 Mounting Screws 47 35 00000 Oooo OOTO E rie ODOC 1 gt Lc I Trim 548 01 e OOOO O ODpOOLD eS COCO Acer T po Trim 70 J1 32 33 48 81 1 2 Nutunder Panel Frame volume knob Dress 8 8 Assembly and Disassembly Procedures A10 Power Supply Regulator Removal A10 Power Supply Regulator Removal Done with top cover removed Remove Digital cover Remove A33 Hop Controller to expose A10 screw Loosen TX 15 screw A Disconnect attached cable and remove power regulator Tools Required e TX 15 screw driver e TX 10 screw driver e 1 4 wrench TOP VIEW 8 9 Assembly and Disassembly Procedures A11 Receiver Mixer Removal A11 Receiver Mixer Removal Done with top cover removed Remove RF cover Remove at least three RF modules
128. nce cal lost Perform reference calibration 1 Connect 10 MHz source to the rear panel REF IN connector 2 On the configuration screen select the Calibrate field 3 Wait approximately 15 seconds the reference will be calibrated Figure 7 1 Adjustments and Calibration Timebase Adjustments Option 001 High Stability Timebase Adjustment Procedure 1 Remove the instrument top cover Power up the instrument and let it warm up for approximately hour 2 Remove the rear panel cable between the Opt 001 REF OUT and REF IN connectors if present 3 Attach a high accuracy frequency counter to the rear panel OPT 001 REF OUT The frequency counter resolution and accuracy should be at least 1 Hz at 10 MHz 4 Adjust the high stability timebase see figure 7 1 until the frequency counter reads 10 MHz After performing this calibration it is necessary to install a cable from the OPT 001 REF OUT to the REF IN connector for the instrument to use the high stability timebase as the reference Adjust to 10 Mhz Rmi High Stability Timebase Adjustment Adjustments and Calibration Periodic Calibrations Periodic Calibrations To Run the Periodic Self Calibration Program Press to access the TESTS screen Select the field to the right of the colon under Procedure Select ROM under the Choices menu Select the field to the left of the colon under Procedure Select PER_CAL under t
129. ned in three parts Service Procedures Reference Information and Theory This sectioning helps to identify the type of information found in a group of chapters Introduction Contents Introduction 1 1 Localizing the Problem Introduction 1 2 Localizing the Problem Flow Chart Power Up 1 3 Power Up Checks 1 4 If Power Up Checks FAILED 1 5 If Power Up Happened Correctly 1 10 2 Running Diagnostics Introduction 2 2 Running Memory Card ROM Based Diagnostics 2 3 Loading and Running the Ram Test 2 7 3 Verifying Performance Introduction 3 2 Installing and Operating the Software 3 2 Using the Compatibility Switch for the HP Agilent 8922F M S 3 3 4 Using the HP Agilent 83210A Service Kit Introduction 4 2 Configuring the RF Extender 4 3 Extending Modules 4 5 Making Measurements 4 6 5 Troubleshooting the Controller Display Introduction 5 2 Parallel Bus 5 3 Serial Bus 5 4 Display 5 5 Keyboard 5 6 Contents 1 Contents 6 Troubleshooting the Power Supply Introduction 6 2 Power Cord Verification 6 3 Line Voltage Selection Line Fuse Replacement 6 5 Transformer Power Switch 6 6 A28 Power Supply 6 7 Where Go Next 6 8 7 Adjustments and Calibration Introduction 7 2 Timebase Adjustments 7 3 Periodic Calibrations 7 5 Sum Loop Adjustment Procedure 7 6 8 Assembly and Disassembly Procedures Contents 2 Introduction 8 2 and Bottom Cover Removal 8 3 Inside Protective Covers 8 4 AF
130. nge of the A18 Spectrum Analyzer assembly it is used by the diagnostics to measure pulse on off ratio of the A12 Pulse Attenuator assembly A2 Audio Analyzer 2 A3 Audio Analyzer 1 These modules are leveraged from an earlier product the HP Agilent 8920A which is primarily an analog communications test set Many of the audio circuits in these assemblies are not used by the HP Agilent 8922 and will not be covered in this discussion Refer to the HP Agilent 8920A Assembly Level Repair manual if further detail on these modules is required For the HP Agilent 8922 the primary function of these assemblies is to provide the oscilloscope functions The HP Agilent 8922 contains no specialized oscilloscope module only these two analyzer assemblies and the A19 Measurement assembly These 14 7 Block Diagram Theory of Operation Block Diagram 1 two analyzer modules provide gain attenuation and distribution functions of the audio signals The 19 Measurement assembly does the actual voltage measurement The interconnection of these modules is shown on Block Diagram 1 The diagnostics for these modules are extensive Like the hardware the diagnostics have been leveraged from the HP Agilent 8920A and test more of the circuits than are actually used in the HP Agilent 8922 The diagnostic output from these modules documents the exact circuits in the modules which are tested 14 8 Block Diagram Theory of Operation Block Diagram 2 Block Diagr
131. nt 8922E F G H M S press RFG RFA 1 10 Highlight the RF Output field 1 Select AUX RF OUT from the list of choices Localizing the Problem If Power Up Happened Correctly Set the RF Generator Amplitude field to 10 dBm 2 Set the AF Generator Amplitude field to 1 V 3 RF IHz UT Atten Hold One Gee RF GENERA Gen Source GMSK Ext OC AM Pulse Hor Tria Horna m GC AGC Mode Qren Auto DAC Value TOR RF ANALYZER RF Ger Hor Control Mode Hoe Tria RF Analyzer Hor Control Mode Tria AF Gen Frequency kHz Anplitude nV Coupling To Screen PHASE FRO RAMP ERROR PHR RF Analyzer RF Analyzer Frequency Anplitude dEn RF Input Control Manual Accuracy Figure 1 5 RF Analyzer Settings Where to Go Next If the generators are within specifications go to the next section Checking the RF Analyzer Using the RF Generator If one or both of the generators appear to be faulty go to Chapter 2 Running Diagnostics and run the appropriate tests 1 11 Localizing the Problem If Power Up Happened Correctly Checking the RF Analyzer Using the RF Generator This section tests the RF Analyzer using the RF Generator as a signal source This task assumes the same setting used in the previous section Connect the RF In Out to the Aux RF
132. ntroller A7 Controller with a parallel bus and through a serial bus to the other analog hardware This illustration is included with pin numbers to allow troubleshooting the serial busses and communication failures to the modules Again no specific memory card diagnostics exist for this module It is unlikely that memory card programs could be executed if the A33 Hop Controller assembly is defective To understand more about the serial and parallel busses connected to the A33 Hop Controller assembly refer to the chapter 5 discussion 14 18 15 Diagnostics Theory 15 1 Diagnostics Theory Introduction Introduction This chapter describes what is tested by the memory card based or ROM based diagnostics and how to interpret the level of certainty that is attached to failure reports This chapter is broken into sections for each of the diagnostic tests and a section for how to interpret results This chapter uses the current diagnostic test names for firmware revision code A 03 00 and above Memory card based diagnostic test names may differ from the current names 15 2 Diagnostics Theory AF_DIAGS AF_DIAGS Audio Frequency Generators 1 and 2 This test checks the A6 Signaling Source Analyzer assembly As a test signal a digital 1 exercises DACs on the output of the A6 Signaling Source Analyzer assembly to verify voltage range using the voltmeter at the LFS1_VM and LFS2_VM outputs Preliminary Audio Paths This
133. o chapters 8 and 9 Selecting from a List Use and to scroll through the list beep will sound when you reach an end of the list Use SHIFT or PG UP J to move to the first item in the list Use SHIFT or PG DOWN to move to the last item in the list Use ENTER J to select the current item and move to the next field on the Screen Use to select the current item and move to the previous field on the screen Running Diagnostics Loading and Running the Ram Test This Page Intentionally Left Blank 2 8 Verifying Performance 3 1 Verifying Performance Introduction Introduction Because of the specialized nature of the HP Agilent 8922 and the equipment required to support it it is recommended that calibration and repair be performed only by specially equipped Agilent Technologies service centers A list of specifications and verfication tests can be found in the HP Agilent 8922x User s Guide Verification Performance Test Software provided with the product is used to verify the electrical performance of the HP Agilent 8922 GSM Test Set If the instrument passes this verification its operation and specifications are assured within the measurement uncertainties provided in the performance test print out Installing and Operating the Software Performace Test Software This is supplied on a 3 5 inch double sided floppy disk and is written to run with BASIC 5 0 and later Modifications to the program sho
134. ock period Similarly a series of all 1 s or all 0 s would cause the carrier to be continuously modulated 90 degrees each clock period This can be seen by viewing the HP Agilent 8922 output with constant 1 or 0 data input With modulation turned on the carrier is offset 67 7 kHz This is caused because the carrier is modulated at 90 degrees times 270 833 kHz 67 7 kHz This also explains the common misunderstanding about why the carrier seems offset when no data is being applied Because of ISI Inter Symbol Interference caused by the low pass filtering the effects of previous data bits can be seen on the RF output To generate this complex signal the A5 Premod Filter and NSM uses a shift register to hold the current data bit as well as the previous 6 data bits These seven bits are used along with a look up ROM to find the exact phase output that the HP Agilent 8922 should generate given the effects of ISI and 0 3 Gaussian filtering This information is given digitally to the NSM Numerical Synthesis Machine chip This IC is a digital synthesizer that converts the digital input data into a digitally coded analog waveform that can be used to directly drive the A27 DAC Upconverter assembly to get the correct analog waveform The diagnostics program checks the A5 Premod Filter and NSM assembly by making sure the internal loop can lock to an external 270 833 kHz signal Since the HP Agilent 8922B and HP Agilent 8922G clock si
135. ont Panel AUX IN2 J1 5 DET LO J1 7 From Input Section AUD IN HI J1 1 From Front Panel AUD IN LO J1 2 From Front Panel Input Z IMQ DEMOD_AUD MOD_MON 100k Q EXT_SCOPE AUX_IN2 DET_LO 1 AUD_IN_HI lt 65 pF to GND Non Floating GND input Ground AUD_IN_LO Floating 65 pF to GND GND lt 200 Q Maximum Input 12 Vp DEMOD_AUD MOD_MON Hardware Limit 9 3 vp EXT SCOPE AUX_IN2 LO 98 Vp AUD IN HLAUD IN LO 12 5 To Audio Analyzer 2 Module I O Specifications A3 Audio Analyzer 1 Outputs FIL_AUD J1 15 Output Z lt 1 Unit Gain Opamp Selected Inputs DEMOD_AUD MOD_MON EXT_SCOPE AUX IN2 DET LO Total Path Accuracy 0 02 to 10 KHz 0 45 96 0 20 40 dB No Filters 0 02 to 25 kHz 1 05 96 0 02 to 75 kHz 7 7 96 DC Offset lt 13 mV 0 dB Gain 13V 40 dB Gain THD Noise lt 07 1 kHz Rate 15 kHz BW Selected Inputs AUD_IN_HI AUD_IN_LO Total Path Accuracy 02 to 12 kHz 0 704 02 to 25 kHz 1 3 02 to 75 kHz 7 95 20 0 20 dB No Filters 3 dB Freq Thru Path 20 dB 0 0 dB 20 dB lt 1 Hz and gt 200 kHz lt 1 Hz and gt 200 kHz lt 1 Hz and gt 100 kHz 12 6 Module I O Specifications A3 Audio Analyzer 1 19 Measurement Board AUD1_VM J1 16 DC Offset t9mV Selected input Range Over voltage detector Response Time lt l ms Rise time
136. rd 08920 60140 Power Supplies 12 V J1 9 2 mA 45V J1 37 39 40 650 mA 12 J1 10 4 mA D Ground J1 13 14 31 32 A Ground J1 2 7 Inputs From A2 Audio Ananlyzer 2 PROC AUD J1 11 Input Impedance Minimum Input Level Maximum Input Level 5 Vpk 12 MHz 0 01 Analyzer timebase 12 13 Module I O Specifications 6 Signaling Source Analyzer Outputs To A4 Modulation Distribution Assembly J1 3 AFG2 J1 5 Freq Range DC to 25 kHz Freq Resolution 0 1 Hz Freq Accuracy 0 01 of setting Output level Max 2 5 Vpk Output Lvl Resolution 12 Bits LSB 5 4096 Output Lvl Acc Uncal t 0 018396 ES Output Channel Clock 838 8608 kHz Output Impedance 1 336 680 pF Shunt THD Noise Sine 0 10 Output 2 5 Vpk Meas BW 80 kHz 20 Hz to 25 kHz For levels and setting up signals for measuring see 4 Modulation Distribution page 12 8 12 14 From 16 Receiver Module I O Specifications A9 Global Test and Demod A9 Global Test and Demod Use extender card 08922 60133 Power Supplies 15 J2 29 30 15 140 mA 15 V 12 25 26 45V J2 23 24 5 V 1221 22 Ground 11 1 33 4 17 18 20 J3 1 4 6 14 16 20 TP 14 16 Inputs 10 7M_IF J1 7 Frequency 10 7 MHz 50 kHz Level 3 dBm 1 dB Harmonics lt 40 dBc The 10 7 MHz is orginated from the 16 Receiver
137. rol operation of the 15 Reference assembly is the Configure Screen refer to the Users Guide for a more complete discussion on the operation of the Reference section Diagnostic procedures for 15 Reference assembly check lock detectors to make sure that the internal loops are locked and level detectors to check if RF power is available on key reference signals The diagnostics cannot check the frequency accuracy of the internal oscillators A5 Premod Filter and NSM The A5 Premod Filter and NSM assembly contains the necessary circuits to convert the user s digital input data and clock signals into a GMSK waveform The inputs to the module are a very accurate 270 833 kHz clock signal and digital TTL level data On the HP Agilent 8922A these two signals are provided directly by the user at the front panel on the other HP Agilent 8922 s these signals are generated by other assemblies 14 9 Block Diagram Theory of Operation Block Diagram 2 Compared to common modulation formats like AM FM and phase modulation the 0 3 GMSK format is more complex and requires special equipment like the HP Agilent 8922 to generate and analyze signals A brief explanation is included here as an overview of the format of 0 3 GMSK The 0 3 GMSK format was chosen because it is very efficient in terms of the amount of information that can be transmitted in a given amount of frequency spectrum To understand 0 3 GMSK it is necessary to first underst
138. sed for DCS run from 512 to 885 GSM900 channels run from 1 to 124 With wider frequency allocation leading to more channels DCS1800 is able to cope with higher user densities DCS1800 mobiles are also designed for lower output powers up to IW so cell sizes have to be smaller meaning even higher densities In all other respects GSM900 and DCS1800 are the same The GSM phase 2 specifications brings the two systems even closer GSM900 gets additional bandwidth and channels called E GSM Extended band GSM and lower power control levels for mobiles allowing micro cell operation These two features allow increased user densities in GSM systems 51900 is in the band around 2 GHz for a PCS Personal Communications System This version of GSM is variously called DCS1900 or PCS1900 In technical terms 51900 is identical to DCS1800 except for frequency allocation 17 4 Index Symbols Reference theory 14 15 Numerics 1 GHz and 500 MHz Level Detectors theory 15 5 1 GHz Oscillator Lock Detector State theory 15 5 10 MHz Fine and Coarse DACs State theory 15 5 10 MHz Lock Detector State theory 15 5 13 MHz Oscillator Lock Detector theory 15 7 A Al part number 9 4 9 5 troubleshooting 5 2 1 Front Panel removal 8 7 10 part location 9 7 10 Power Supply Regulator Removal 8 9 All part location 9 7 part number 9 6 specs 12 19 theory 14 5 Al2 part location 9 7 part number 9 6 theory
139. sembly must be separated from the main chassis Considerable pulling force is required to pull the front panel from the chassis 2 3 o m MF Disconnect RF cable 5 16 inch SMC connector Remove front bezel Slide a flat blade screw driver under the left bottom corner of the bezel and pry it forward until it pops loose Remove four TX 15 front panel mounting screws Remove two 5 18 inch hex nuts Pull the CRT assembly and the front panel apart Be careful not to damage RF cabling Remove four TX 15 CRT bracket mounting screws Loosen two TX 15 input mounting screws Slide the monitor out of the CRT shield Tools Required TX 15 screw driver TX 10 screw driver 2 pt Pozidriv 5 8 inch wrench 1 4 inch wrench 5 16 inch wrench flat blade screw driver Assembly and Disassembly Procedures A22 Display Removal 4 4 places OOOCOCO BAA m Q0 c 8 17 Assembly and Disassembly Procedures A23 Input Section Removal A23 Input Section Removal Done with instrument top and bottom cover removed 1 Do steps 1 through 11 of the A1 Front Panel removal instructions NOTE The front panel assembly must be separated from the main chassis Considerable pulling force is required to pull the front panel from the chassis Remove two 5 8 inch hex nuts 2 3 Remove two TX 15 side mounting screws 4 Remove one TX 15 bottom mounting s
140. ses that interconnect the instrument controllers A7 Controller A32 GSM Controller A34 GSM RTI and A37 Sequence Controller with the other assemblies Chapter 5 Troubleshooting the Controller Display contains information about troubleshooting and an explanation of the serial and parallel busses that interconnect the assemblies A19 Measurement The A19 Measurement assembly contains the circuits necessary to measure voltage and count frequency These circuits are interconnected throughout the instrument with a series of multiplexers The measurement board also synchronizes the measurements for the spectrum analyzer and the oscilloscope display The block diagram shows the pin numbers and signal names of most voltage and counter inputs to this assembly While there are no specific diagnostics for the A19 Measurement assembly it is used extensively to diagnose other parts of the instrument If the diagnostics incorrectly indicate a faulty assembly the measurement board may be a likely cause Use the pin number information to verify that the voltages and frequencies are properly transferred from the modules to the A19 Measurement assembly A33 Hop Controller The A33 Hop Controller assembly controls the I O to most analog and RF hardware in the instrument Problems with this assembly will usually appear as multiple failures during the power up diagnostics as indicated on the A7 LED s The A33 Hop Controller assembly communicates to the main co
141. signal paths to be opened for making measurements The following procedure outlines the steps necessary to make measurements on the RF modules with the RF extender board 1 Configure the RF extender card with the proper coax jumpers Refer to table 4 2 and figure 4 1 2 Decide the signal path that needs to be measured Find the correct plug number and pin number on the Block Diagrams chapter 13 or Module I O Specs chapter 12 Using the HP Agilent 83210A Service Kit Making Measurements 3 Remove the correct coax jumper and connect a measurement instrument as shown in the following diagram To measure signals going TO the module measurements should be made on the lower row of connectors on the extender module Outputs coming FROM the modules going into the instrument are measured on the top row of connectors on the extender board EXTENDER CARD SWS 0000000000 0000000000 Measure outputs signals from the module on the top row of connectors 2 2 6 55 2 8 5 2 9 3 Measure Input signals to the module on the bottom row of connectors P1 P3 4 Turn off the instrument s power switch Remove the module from the instrument Install the module onto the extender board and install the extender board into the instrument 5 Power on the instrument and make the measurements
142. sponding but this is not allowed Press I for Ignore to continue past this screen The second screen prompts you for the instrument model If you have disk 08922 10006 select HP 8922G for HP Agilent 8922H M performance testing or HP 8922E for HP Agilent 8922F S performance testing The third screen which will appear is the main Performance Tests selection menu Three options are available on this screen O Select the performance test to run remember the test instruments UUT must be responding over GPIB O Turn the printer function ON or OFF If the printer function is turned on it must be responding over GPIB or the program will lock up O Exit from the program Press the key corresponding to the option that you would like to perform The other screens that appear are connection instructions error messages and output results Using the HP Agilent 83210 Service Kit 4 1 Using the HP Agilent 83210A Service Kit Introduction Introduction This section is a supplement to the diagnostics program for troubleshooting the HP Agilent 8922 to the assembly level The extender boards should be used when the diagnostics cannot correctly isolate a defective assembly or when it is necessary to verify the module level performance of the HP Agilent 8922 The section provides the information necessary to extend and troubleshoot the input and output signals for most RF audio and digital assemblies Using the HP Agilent 8321
143. t 15mV Detector Range 0 424 to 5 Peak Selected path Pre Notch RMS detectors Input FILT_AUD Specified Meas Range 0 296 to 1 67 Vims Selected path Post Notch RMS detectors Input FILT_AUD RMS detector settling time Slow lt 200 Hz 673 us Fast gt 200 Hz 93 us Specified Meas Range 0 200 to 1 67 Gain lt 40 dB 0 095 to 1 67 ms Gain 40 dB 3 dB Bandwidth gt 160 kHz 70 dB total Gain Notch Attenuation gt 40 dB 1 kHz 20 Hz gt 65 dB 1 kHz 5 Hz Selected path DC AUDIO Input ZFILT AUD Input Impedance 100 DC Offset 16 mV Over Temp Selected path Pre Notch Audio Input FILT AUD DC Offset lt 16mV Over Temp Available Gain 30 dB Selected path Post Notch Audio Input FILT AUD DC Offset t 16 mV Over Temp Available Gain 70 dB SPEAKER SPK1 J1 2 Max Output 8 Q 250 mW Input FILT_AUD Amp Gain Adjust Range 0 to 20 ALC circuit output level 0 25 Vp ALC Mode 12 4 Module I O Specifications A3 Audio Analyzer 1 A3 Audio Analyzer 1 Use extender card 08920 60142 The Primary function of Audio Analyzers 1 and 2 is to provide oscilloscope functions Power Supplies 5 J1 21 22 20 mA 12 V 11 19 60 12 V 11 20 60 mA GND Analog 11 3 4 8 12 13 17 18 GND Digital J1 23 24 26 27 Inputs AUDIO INPUT MUX DEMOD_AUD J1 6 From A16 Receiver MOD MON J1 10 From Mod Distribution EXT SCOPE J1 11 From Fr
144. t assembly This section is the most likely cause of output level accuracy problems especially hard failures where the output is incorrect by 5 to 20 dB indicating an attenuator pad has failed 14 13 Block Diagram Theory of Operation Block Diagram 2 A4 Modulation Distribution A6 Signaling Source Analyzer These modules are leveraged from an earlier product the HP Agilent 8920A which is primarily an analog communications test set Many of the audio circuits in these assemblies are not used by the HP Agilent 8922 and will not be covered in this discussion Refer to the HP Agilent 8920A Assembly Level Repair manual if further detail on these modules is required For the HP Agilent 8922 the function of the A6 Signaling Source Analyzer is simply to create sinusoidal audio signals The analyzer capabilities of this module are not used in the HP Agilent 8922 The A4 Modulation Distribution assembly provides gain attenuation and distribution functions of these audio signals as well as the AM Speech input from the front panel The interconnection of these modules is shown on Block Diagram 2 The diagnostic procedures for these modules are extensive Like the hardware the diagnostics have been leveraged from the HP Agilent 8920A and test more of the circuits than are actually used in the HP Agilent 8922 The diagnostic output from these modules documents the exact circuits in the modules which are tested 14 14 Block Diagram Theory of
145. tem Agilent Part CD Qty Description Number 3 08922 61011 AY FRAME CHASSIS 12 08922 00004 CRT BRACKET 114 08922 00030 115 117 0515 1950 118 0515 0380 240 08922 00028 241 242 0515 1950 244 08922 00055 252 08922 00007 416 421 0515 0380 424 08922 00032 425 08922 00015 426 08922 00031 427 456 0515 0380 458 08922 00018 492 08922 00044 492 08922 00072 493 498 0515 1950 499 501 2190 0124 502 504 2950 0078 505 08922 00043 506 521 0515 1950 3 SCREW MACH 55 SMM4 0 105 BRACKET 2 SCREWM3X 5 PLATE STANDARD COVER POWER SUPPLY 6 5 4 0 10SEMPNTX RF COVER COVER AIR DIGITAL COVER AIR AUDIO 29 SMM4 0 10SEMPNTX TIMEBASE COVER Opt 001 COVER B Only COVER G H Opt 003 Only SCREW MACH M3 5 WSHR LK 1941D NUT HEX 10 32 PLATE 15 SCREW MACH M3 X 5 4 Oo A U WO NY amp d GS FON 9 20 Mfr Code Mfr Part Number 28480 28480 28480 00000 00000 28480 00000 28480 28480 00000 28480 28480 28480 00000 28480 28480 28480 00000 00000 00000 28480 00000 08922 61011 08922 00004 08922 00030 ORDER BY DESCRIPTION ORDER BY DESCRIPTION 08922 00028 ORDER BY DESCRIPTION 08922 00055 08922 00007 ORDER BY DESCRIPTION 08922 00032 08922 00015 08922 00031 ORDER BY DESCRIPTION 08922 00018 08922 00044 08922 00072 ORDER BY DESCRIPTION ORDER BY DESCRIPTION ORDER BY DESCRIPTION 08922 00043 ORDER B
146. tep Loop 1M REF B P3 1 Frequency 1 MHz X5Hz Levels CMOS Duty Cycle 800 ns high 200 ns low Amplitude 4 Vdc Waveshape square wave not a true square wave Duty Cycle 80 Module I O Specifications A15 Reference See Figure 4 6 on page 12 28 See Figure 4 6 on page 12 28 12 27 Module I O Specifications A15 Reference A 4 8 Vp p 200 ns 800ns Figure 4 6 Typical Display To A14 Pulse Driver 1M REF C J3 2 Frequency 1 MHz 5 Hz See Figure 4 7 on Levels CMOS page 12 28 Duty Cycle 800 ns low 200 ns high Amplitude 1 Vdc Waveshape square wave not a true square wave Duty Cycle 20 5 0 Vp p gt 44 gt 200 ns 800 ns Figure 4 7 Typical Display 12 28 18 Spectrum Analyzer SA 20 REF J3 5 Module I O Specifications A15 Reference Frequency Waveshape Harmonics 20 MHz 100 Hz 25 dBc Subharmonics Signal Level Spurious at gt 5 kHz offsets lt 30 dBc lt 70 dBc gt 3 dBm 10 dBm typical Amplitude 1 Vims 2 8 Vp p To 19 Measure Assembly Readings same as SA_20M_REF To A27 DAC Upconverter MEAS 20M REF J3 13 Frequency 20 MHz 100 Hz Waveshape Sine Harmonics 25 dBc Subharmonics 30 dBc Signal Level 245 dBm Spurious at gt 5 kHz offsets lt 70 dBc 10M REF C J3 9 Frequency 10 MHz 50 Hz Waveshape
147. trument will beep once after approximately 10 seconds If these tests do not pass the problem is probably on one of the two boards or something is pulling down the parallel bus The assemblies that are not directly checked by the power on self tests are the A1 Keyboard and the A21 GPIB Interface Troubleshooting the Controller Display Serial Bus Serial Bus The serial bus controls many of the assemblies through individual serial control lines The serial control lines are generated at the A33 Hop Controller The A33 Hop Controller takes parallel data from the A7 Controller and de multiplexes the data for the assemblies on the serial bus In the power up self tests the A33 Hop Controller and the assemblies on the serial bus are tested If a power up self test serial bus failure occurs and no A33 failures have occurred the problem could be between the A33 Hop Controller and the assembly identified in the failure Display Troubleshooting the Controller Display Display The display section contains the A22 CRT and the A20 CRT Drive The A20 CRT Drive receives parallel data from the A7 Controller and generates the drive signals for the A22 CRT The A20 CRT Drive is tested during the power up self tests for the ability to receive data and to respond back to the A7 Controller If the A20 CRT Drive passes the power up self tests and the display does not respond the signals going to the A22 CRT can be checked at J6 on the A29 Motherboard
148. uld be limited to changing the default addresses and storing copies for back up purposes Understanding the Tests Test Descriptions contains a description of each test that is performed by the Performance Test software This description is intended to help locate problems if the software fails to execute properly or to help users understand the test methodology that is used in each performance test The descriptions are not step by step procedures for manual performance tests Verifying Performance Using the Compatibility Switch for the HP Agilent 8922F H or M S To Load the Program in the Agilent 8922M S To verify the performance of the HP Agilent 8922H M you need to convert the instrument back from an HP Agilent 8922G or convert the HP Agilent 8922F S to an HP Agilent 8922E You are now ready to run the Performance Test Software 1 Put the disk in the disk drive 2 Type LOAD PT_8922 press ENTER After you have completed the Performance Tests return the instrument back to the HP Agilent 8922F S or HP Agilent 8922H M using the same process in reverse Using the Compatibility Switch for the HP Agilent 8922F H or M S Back Conversion To turn the instrument from the HP Agilent 8922H M or HP Agilent 8922F S back to an HP Agilent 8922G or an HP Agilent 8922E select the following keys 1 CONFIG this is accessible from the Cell Control screen in the bottom right hand corner O Compatible select HP 89226 or 8922
149. ults Assemblies suspected to be defective TESTS IBRSIC Controller Runnitigess Failure count so for 2 Running Diagnostics Running Memory Card or ROM Based Diagnostics Failure Detected Suspect Reference Assembly Medium Ext Reference Lock Qut Expected Actual 2 failure s occurred in this test Suspect Reference Assembly hish End of Reference Rssqnbly Test To Screen BIT ERROR DSP ANL Probability Indicator Troubleshoot the assembly with the highest probability first and re run test Continue this process with all assemblies listed until the defect is found See also Chapter 15 Diagnostic Theory 2 5 Running Diagnostics Running Memory Card or ROM Based Diagnostics Selecting Memory Card Diagnostic Test Execution Conditions BEFORE RUNNING A TEST WHILE RUNNING A TEST Specifies whether to run measurements continuously or stop after completion of each measurement This choice can be modified when a diagnostic program is running Specifies whether to stop testing or continue when a Procedure Location failure occurs This choice TESTS Lhbrary Program Autostart 1 T MR E can be modified when a Continue i Comment diagnostic program is Edit Sean running Edit Parn Test Execution Comditipns Failure Continue Stor utput Results Destination AL Foilures inter To Screen
150. um analyzer GMSK Modulation can be seen between centre frequency and first harmonics by level of increased noise floor 12 52 From 15 Reference Module I O Specifications A17 A26 Step Loop A17 A26 Step Loop Use extender card 08922 60129 Use coax jumpers on Plug 1 pin 3 Plug 3 pin 3 Power Supplies 15V J2 2 250 mA 15 J2 3 45V J2 4 Ground J1 1 2 4 20 J3 1 2 4 20 Inputs 1M REF P3 3 Frequency Level 1 MHz 5 Hz CMOS For measurement procedure refer to A15 Reference page 12 26 From A25 Sum Loop for A26 Step Loop A only SUM_LOCK J2 1 Level TTL High Out of Lock High Typically 7 Vdc Low Typically lt 0 3 Vdc 12 53 From A33 Hop Controller Module I O Specifications A17 A26 Step Loop Hop Control J2 5 8 9 Levels TTL Clock Rate 1 bursted Levels Pin 5 5 Vdc Pin 8 1 25 Vdc Pin 9 0 Vdc Outputs To A25 Sum Loop Assembly SUM_LP_PTUNE J2 7 Level 12 Vdc to 12 Vdc See A25 Sum Loop page 12 50 for measurement procedure To A25 Sum Loop A26 Step Loop To 11 Receiver Mixer A17 Step Loop STEP_LP_OUT J1 3 Frequency 486 1015 MHz Resolution 100 kHz Level 3dB 3dB Harmonics lt 20 dBc Spurs gt 5 kHz offsets lt 60 dBc Waveshape sine Levels 350 Vims 1 Vp p Step Loop B A17 To achieve
151. ure 1 8 CW Readings Where to Go Next Ifthe analyzer measurement was within the specification go to the next section Checking the AF Analyzer using the AF Generator Ifthe measurement was faulty go to Chapter 2 Running Diagnostics and run the test related to the RF Analyzer 1 14 Localizing the Problem If Power Up Happened Correctly Checking the AF Analzyer Using the AF Generator This section tests the AF Analyzer with the AF Generator as a source The AF Generator settings are the same as the first task and displays the CW MEAS AF ANL screen Connect the AUDIO OUT to the AUDIO IN Figure 1 9 Front Panel Connections for the Audio Check e Select More and from the list select CW MEAS AF ANL Highlight AF 1 Inandselect AUDIO 1 e Readthe AC Level 2 andthe AF Freq 3 reading Figure 1 10 2 3 AUDIO YOLTMETERS AC Lepel NN 0 00027 1 55963 GENERATORS ANALYZER Meas Cnt RF Anl In Taio Gen PEEL Freauency Speech MOBILE Audio Measurements Echo Delay Audio In Lo Ext Load R TESTES Speaker Vol Speaker ALC Pot ott TIENI n Chan Leu Tineslot 1 15 Localizing the Problem If Power Up Happened Correctly Where to go next If the analyzer measurement was within specification go to Chapter 2 Running Diagnostics and run all the tests If the analyzer measurement was faulty go to
152. wer Cord Verification Line Cords Cable Length Agilent T 5 Cable PlugType Part D Plug Description inches Color mm Number 8120 2956 90 Straight 8120 2957 90 90 8120 3997 Straight Straight For Use In Country Denmark 8120 4211 7 Straight IEC83 B1 9 79 201 Black South Africa India 8120 4600 8 Straight 90 79 201 Gray 8120 1860 6 Straight 22 1 59 150 Jade Systems Cabinet Use Gray 8120 1575 0 Straight Straight 31 79 8120 2191 8 Straight 90 59 150 Jade 8120 4379 8 90 90 80 203 Gray Jade Gray Jade Gray a Part number shown for plug is industry identifier for plug only Number shown for cable is Agilent Part Number for complete cable including plug E Earth Ground L Line N Neutral Troubleshooting the Power Supply Line Voltage Selection Line Fuse Replacement Line Voltage Selection Line Fuse Replacement Use this diagram to verify that the line module is set to the correct line voltage that the fuse is not blown and that it is the correct value Nother modules See A29 4 Motherboard Y Module I O Specs Dy A NES 35 J L L 9 J9 J7 lt Power N N A2 8 N V ic Line In Fuse
153. wer switch This chapter is arranged to check each section of the power supply The views of the instrument in this chapter are both top and bottom views with the covers removed Refer to chapter 8 Assembly Disassembly for help in removing the covers NOTE The mains line fuses and power supply DC fuses in the HP Agilent 8922 are all fast blow fuses not slow blow Table 6 1 Power Cord Verification Use this diagram to verify that the correct line cord is being used Line Cords Cable Agilent Part Number PlugType 8120 1351 8120 1703 8120 1369 8120 0696 8120 1689 8120 1692 Plug Description 90 Straight BS1363A 90 Straight A NZSS198 ASC112 Straight 90 Straight 90 Troubleshooting the Power Supply Length inches mm Power Cord Verification For Use In Country United Kingdom Cyprus Nigeria Rhodesia Singapore Australis Argentina New Zealand Mainland China East and West Europe Central African Republic Arabia Egypt 8120 1378 8120 4753 8120 1521 8120 4754 Straight NEMA5 15P Straight 90 90 8120 1348 8120 1538 8120 2104 8120 2296 8120 3997 8120 0698 Continued Over Straight 90 Straight SEV 1011 1959 24507 Type 12 Straight 90 Straight 90 Straight NEMA6 15P United States Canada Mexico Phillipines Taiwan Japan Switzerland United States Canada Table 6 1 Troubleshooting the Power Supply Po
154. y or automatically This keeps the input level within a range that works best for the mixers IF amplifiers and detector in the remainder of the HP Agilent 8922 Filters are automatically switched in to remove images and other interfering signals The frequency ranges of the 4 different filters are shown on Block Diagram 1 The A23 Input assembly contains a voltage multiplexer mux to route internal diagnostic voltages to the 19 Measurement assembly Diagnostics individually check that all the input attenuator switches provide attenuation although the accuracy of this measurement 14 4 Block Diagram Theory of Operation Block Diagram 1 is limited The diagnostics also verify the input filters and a connectivity check is provided to verify the connections going into and out of the A23 Input assembly This section is a likely cause of power measurement problems especially if the diagnostics pass indicating that the measurement board is responding correctly A17 StepLoop B This assembly creates RF reference signals from 500 to 1000 MHz These signals are derived from a 1 MHz output from the 15 Reference section assembly and digital inputs from the A33 Hop Controller assembly The HP Agilent 8922 has the ability to change RF frequencies very quickly to frequency This is necessary because the radios and base stations change frequencies and the HP Agilent 8922 must be able to change along with them The A33 Hop Controller assemb
155. y of Operation 14 2 Timebase Adjustments 7 2 Top and Bottom Cover Removal 8 3 torque 8 2 Tracking Filter Rejection theory 15 7 Transfomer 6 6 Transformer 6 6 V Variable Gain IF Amplifier theory 15 9 verifying performance 3 1 Index 5 Index Index 6

Agilent Technologies 8922S Specifications

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