Assembly Level Repair HP/Agilent Technologies 8922 Series GSM Test Set Agilent Part No.
© Copyright 1998, Agilent Technologies. All 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, HP/ Agilent 8922H, HP/Agilent 8922M and HP/Agilent 8922S.
Introduction ii
Contents Introduction i 1 Localizing the Problem Introduction 1-2 Localizing the Problem - Flow Chart (Power-Up) Power-Up Checks 1-4 If Power-Up Checks FAILED 1-5 If Power-Up Happened Correctly 1-10 1-3 2 Running Diagnostics Introduction 2-2 Running Memory Card or ROM Based Diagnostics Loading and Running the Ram Test 2-7 2-3 3 Verifying Performance Introduction 3-2 Installing and Operating the Software 3-2 Using the Compatibility Switch for the HP/Agilent 8922F/ H or M/S 3-3 4 Using the HP/Agil
Contents 6 Troubleshooting the Power Supply Introduction 6-2 Power Cord Verification 6-3 Line Voltage Selection / Line Fuse Replacement Transformer / Power Switch A28 Power Supply 6-7 Where To Go Next 6-8 6-6 7 Adjustments and Calibration Introduction 7-2 Timebase Adjustments Periodic Calibrations 7-3 7-5 Sum Loop Adjustment Procedure 7-6 8 Assembly and Disassembly Procedures Introduction 8-2 Top and Bottom Cover Removal Inside Protective Covers 8-3 8-4 AF, Digital and RF Assemblies Rem
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 A3 Audio Analyzer 1 12-5 A4 Modulation Distribution 12-8 A5 Premodulation Filter and NSM A6 Signaling Source/Analyzer A9 Global Test and Demod A11 Receiver Mixer A13 Output 12-10 12-13 12-15 12-19 12-22 A14 Pulse Driver A15 Reference A16 Recei
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 Block Diagram 4 14-17 Block Diagram 5 14-18 14-15 15 Diagnostics Theory Introduction 15-2 AF_DIAGS 15-3 RF_DIAGS 15-5 MS_DIAGS 15-11 GSM and DCS Diagnostic Tests Interpreting Results Contents-4 15-13 15-12
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
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1 Localizing the Problem 1-1
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.
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 below.
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.
Localizing the Problem If Power-Up Checks FAILED If Power-Up Checks FAILED If the power up checks failed, continue with this section. ❒ If the fan did not start, see "Troubleshooting the 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.
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. The LED’s on the controller board give the results of the power-up self-test. (a) Remove the instrument covers. Refer to the section "Top and Bottom Covers", Chapter 8, for details. (b) Power up the instrument. (c) Read the LED sequence given on the controller board.
Localizing the Problem If Power-Up Checks FAILED The following conventions are used to represent the LED’s throughout this chapter. Table 1-2 LED Conventions LED shown in tables Represnts A ’lit’ LED An ‘off’ LED A flashing LED LED Sequences 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".
Localizing the Problem If Power-Up Checks FAILED Table 1-3 Sequence of LED Patterns 3 2 1 0 3 2 1 0 1 2 Assembly failure. 3 2 1 0 3 2 1 0 3 2 1 0 3 2 1 0 3 4 NOTE Serial Bus Communication Failures 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.
Localizing the Problem If Power-Up Checks FAILED Where to Go Next ❒ 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.
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 functionally check most of the hardware. The generators are checked first with external measurements, then the analyzers are checked with the generator. The RF Generator is checked at 935 MHz and 10 dBm. The AF Generator is checked at 1 kHz and 1 V.
Localizing the Problem If Power-Up Happened Correctly Highlight the RF Output field (1). Select AUX RF OUT from the list of choices. Set the RF Generator Amplitude field to 10 dBm (2). Set the AF Generator Amplitude field to 1 V (3). 1 2 3 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”.
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. • Figure 1-6 Connect the RF In/Out to the Aux RF Out. Front Panel Connections for the RF Analyzer Press NOTE RF GEN RF ANL . On the HP/Agilent 8922A/B, press RF GEN RF ANL . On the HP/Agilent 8922E/F/G/H/M/S, press SHIFT , 1-12 CELL CNTL (RF GEN RF ANL).
Localizing the Problem If Power-Up Happened Correctly • • • • Set the RF Analyzer Frequency field to 935 MHz (1). Set the RF Analyzer Amplitude field to 10 dBm (2). Set the Mod Source GMSK field to Off (3). Select More in the bottom right-hand corner of the screen (4).
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 Figure 1-8 6 CW Readings Where to Go Next • If the analyzer measurement was within the specification, go to the next section, “Checking the AF Analyzer using the AF Generator”. • If the measurement was faulty, go to Chapter 2, “Running Diagnostics”, and run the test related to the RF Analyzer.
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. • Figure 1-9 Connect the AUDIO OUT to the AUDIO IN. Front Panel Connections for the Audio Check • • • Select More and from the list, select CW MEAS/AF ANL. Highlight AF Anl In and select AUDIO IN (1).
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 Chapter 2, “Running Diagnostics” and run the tests relating to the AF Analyzer.
2 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 0892210003 or in ROM memory for instruments with firmware revision code A.03.00 and above.
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 PRESET TESTS 2 - Insert Memory Card (Optional) 2-3
Running Diagnostics Running Memory Card or ROM Based Diagnostics 6 4 Move cursor here and press knob. For Memory Cards: If CARD is displayed, go to step 6, if not move the cursor to this field, press knob and continue at step 5. 8 Move cursor here and press knob. Follow the instructions to start. 5 Select CARD 7 Select, AF_DIAGS, RF_DIAGS1, MS_DIAGS1, CAL_REV, LOOP_BACK To select another test; • To select another tests from the same program use the RESUME user key.
Running Diagnostics Running Memory Card or ROM Based Diagnostics Reading Memory Card Diagnostic Test Results Test Results Probability Indicator Assemblies suspected to be defective 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'.
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 failure occurs. This choice can be modified when a diagnostic program is running.
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 Type MSI A: (substitute your drive specifier for A: if your drive is not drive A) and press ENTER . 4 Type LOAD “DRIVER22B”,1 and press ENTER . The Data Buffer Driver will now be loaded and will begin to run.
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3 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.
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.
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.
4 Using the HP/Agilent 83210A 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.
Using the HP/Agilent 83210A 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.
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 A13 assembly.
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.
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.
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. 4. Turn off the instrument’s power switch. Remove the module from the instrument.
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5 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: • A1 Keyboard • A7 Controller • A8 Memory • A20 CRT Driver • A21 HP-IB Interface • A33 Hop Controller Problems in the Control sections can be broken into four types, these types are: • Parallel Bus • Serial Bus • Display • Keyboard This chapter addresses each category in a separate section.
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.
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.
Troubleshooting the Controller/Display 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.
Troubleshooting the Controller/Display Keyboard Keyboard The A1 Keyboard assembly contains both the keys and the knob. The keyboard is configured in a matrix with 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.
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 A1 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.
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6 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 power switch. This chapter is arranged to check each section of the power supply.
Troubleshooting the Power Supply Power Cord Verification Power Cord Verification Use this diagram to verify that the correct line cord is being used.
Troubleshooting the Power Supply Power Cord Verification Table 6-1 Line Cords PlugType Cable Agilent C Plug Description Part D Number 8120-2956 8120-2957 8120-3997 3 4 4 90/Straight 90/90 Straight/Straight 8120-4211 8120-4600 7 8 8120-1860 6 8120-1575 8120-2191 8120-4379 0 8 8 Length, Cable inches Color (mm) For Use In Country 79 (201) Gray Gray Gray Denmark Straight IEC83-B1 Straight/90 79 (201) 79 (201) Black Gray South Africa, India Straight CEE22-V1 (Systems Cabinet Use) Straight/S
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.
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.
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.
Troubleshooting the Power Supply Where To Go Next Where To Go Next If any part of the power 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.
7 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”.
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 reference cal lost. Perform reference calibration.” 1. Connect a 10 MHz source to the rear panel REF IN connector. 2.
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 1 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.
Adjustments and Calibration Periodic Calibrations Periodic Calibrations To Run the Periodic Self-Calibration Program 1. Press TESTS to access the TESTS screen. 2. Select the field to the right of the colon under Procedure. 3. Select ROM under the Choices: menu. 4. Select the field to the left of the colon under Procedure. 5. Select PER_CAL under the Choices: menu. 6. Select RUN TEST . 7. 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. Turn off the HP/Agilent 8922. 2.
Adjustments and Calibration Sum Loop Adjustment Procedure Second Adjustment 9. Now set the HP/Agilent 8922 frequency to 502 MHz. 10. Set the spectrum analyzer center frequency to 488.6 MHz with a span of 10 MHz per division. 11. Adjust R180 “GAIN” on top of Sum Loop (A25) until the signal on the spectrum analyzer is centered within 10 MHz. 12. 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).
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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.
Assembly and Disassembly Procedures Top and Bottom Cover Removal Top and Bottom Cover Removal 1. Remove four 2-pt. Pozidriv top bumper mounting screws. 2. Remove four 2-pt. Pozidriv side mounting screws and bumpers. 3. Remove four 2-pt. Pozidriv screws and standoffs. 4. Remove fourteen TX-10 screws and top cover. 5. Remove two TX-10 screws and bottom foot. 6. Remove two TX-15 screws and bottom cover. Tools Required • TX-15 screw driver • TX-10 screw driver • 2-pt.
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 493498 506521 244 499501 Washer 458 (Opt.
Assembly and Disassembly Procedures AF, Digital and RF Assemblies Removal AF, Digital and RF Assemblies Removal A27 A28 A25 A13 A15 A11 A20 A16 A18 A17 A19 A14 A32 A2 A3 A4 A5 A6 A9 A8 A7 A33 A34, (A,G) A31, (G) A36, (B) A37 (B) 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 PULL RING CAUTION Before pulling ring on the A8 Memory Board loosen the securing screw. Use a TX-10 Torx head screwdriver to loosen.
Assembly and Disassembly Procedures A1 Front Panel Removal A1 Front Panel Removal Done with top, bottom, and inside protective covers removed. Removing Modules 1. Remove RF cover. 2. Remove RF modules. Disconnecting Cables 3. Disconnect RF cable on mixer assembly. (1/4-inch SMA connector) 4. Disconnect cable from connector J77 on motherboard. 5. Disconnect top cable from pulse switch. 6. Disconnect cable from connector J6 on motherboard. 7. Disconnect cable from connector J5 on motherboard. 8.
Assembly and Disassembly Procedures A1 Front Panel Removal 7-11 (A1 Mounting Screws) 47 35 A1 6 (Trim) 548 27-30 546 (Trim) 49-52, 54-63, 66 37 38-43, 45, 46, 65 36 547 (Trim) 34 W31 Power Switch 70 J1 32 33 48 1 31 (Panel (Nut under volume knob) Dress) 2 (Frame) RFI Gaskets Top 532 Bottom 533 Right Side 528, 529 Left Side 530,531 8-8
Assembly and Disassembly Procedures A10 Power Supply Regulator Removal A10 Power Supply Regulator Removal Done with top cover removed. 1. Remove Digital cover. 2. Remove A33 Hop Controller to expose A10 screw. 3. Loosen TX-15 screw. 4. Disconnect attached cable and remove power regulator.
Assembly and Disassembly Procedures A11 Receiver Mixer Removal A11 Receiver Mixer Removal Done with top cover removed. 1. Remove RF cover. 2. Remove at least three RF modules. 3. Remove three TX-10 screws. 4. Disconnect all cables and remove the A11 Receiver Mixer assembly.
Assembly and Disassembly Procedures A11 Receiver Mixer Removal 1 2 TOP VIEW MIXER 3 SIDE VIEW 8-11
Assembly and Disassembly Procedures A12 Pulse Attenuator Removal A12 Pulse Attenuator Removal Done with top cover removed. 1. Remove RF cover. 2. Remove at least three RF modules. 3. Remove two TX-10 screws. 4. Disconnect all cables and remove A12.
Assembly and Disassembly Procedures A12 Pulse Attenuator Removal 1 2 TOP VIEW PULSE SWITCH 3 SIDE VIEW 8-13
Assembly and Disassembly Procedures A21 GPIB Interface Removal A21 GPIB Interface Removal Done with top cover removed. 1. Remove four TX-15 power supply cover screws. 2. Remove two 7mm bolts. 3. Remove one TX-10 screws. 4. Disconnect ribbon cable.
Assembly and Disassembly Procedures A21 GPIB Interface Removal 1 TOP VIEW 2 3 4 8-15
Assembly and Disassembly Procedures A22 Display Removal A22 Display Removal Done with instrument top and bottom covers 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. 2. Disconnect RF cable. (5/16-inch SMC connector.) 3. Remove front bezel.
Assembly and Disassembly Procedures A22 Display Removal 3 2 CRT 4 (4 places) 5 7 CRT SIDE VIEW 6 8 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. 2. Remove two 5/8-inch hex nuts. 3. Remove two TX-15 side mounting screws. 4. Remove one TX-15 bottom mounting screw. 5.
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 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. 2. Remove two TX-15 attenuator mounting screws. 3. Disconnect two RF cables. (5/16-inch SMA connectors.) 4.
Assembly and Disassembly Procedures A28 Power Supply Removal A28 Power Supply Removal Done with instruments top and bottom covers removed. 1. Remove power supply cover. 2. Remove standard plate. If installed remove option 001. 3. Remove five TX-10 screws that attach power supply board to the main chassis. 4. Remove the eight 2-pt. Pozidriv rear panel mounting screws (four on each side). 5. Remove the four TX-10 transformer mounting screws. 6. Remove the eight TX-10 connector plate mounting screws. 7.
Assembly and Disassembly Procedures A28 Power Supply Removal 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 • TX-15 screw driver • 2-pt.
Assembly and Disassembly Procedures Fan Removal 8-23
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 • TX-15 screw driver • 2-pt.
9 Replacing a Part 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 defective assembly for credit. With some assemblies you will receive a Memory Card that contains factory-generated calibration data for the assembly.
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.
Replacing a Part Replaceable Parts Table 9-2 Replaceable Parts Item Agilent Part Number C D Qty.
Replacing a Part Replaceable Parts 7-11 (A1 Mounting Screws) 47 35 A1 6 (Trim) 548 27-30 546 (Trim) 49-52, 54-63, 66 37 38-43, 45, 46, 65 36 547 (Trim) 34 W31 Power Switch 70 J1 32 33 48 1 31 (Panel (Nut under volume knob) Dress) 2 (Frame) RFI Gaskets Top 532 Bottom 533 Right Side 528, 529 Left Side 530,531 9-5
Replacing a Part Replaceable Parts Table 9-3 Replaceable Parts Item Agilent Part Number C D Qty. Description Mfr. Code Mfr.
Replacing a Part Replaceable Parts 9-7
Replacing a Part Replaceable Parts Table 9-4 Replaceable Parts Item Agilent Part C Number D Qty. Description Mfr. Mfr.
Replacing a Part Replaceable Parts 9-9
Replacing a Part Replaceable Parts Table 9-5 Replaceable Parts Item Agilent Part Number C D Qty. Description A28 08922-61043 6 1 POWER SUPPLY 28480 08922-61043 08645-60132 6 1 BD AY-PWR S STBD 28480 08645-60132 08645-60133 7 1 BD AY-FUSE 28480 08645-60133 0515-1860 5 4 SCREW 1.5FM 3.
Replacing a Part Replaceable Parts 9-11
Replacing a Part Replaceable Parts Table 9-6 Replaceable Parts Item Agilent Part Number C D Qty. Description Mfr. Mfr.
Replacing a Part Replaceable Parts 9-13
Replacing a Part Replaceable Parts Table 9-7 Replaceable Parts Item Agilent Part Number C D Qty. Description Mfr. Code Mfr.
Replacing a Part Replaceable Parts Table 9-7 Replaceable Parts Item Agilent Part Number C D Qty. Description Mfr. Code Mfr.
Replacing a Part Replaceable Parts 9-16
Replacing a Part Replaceable Parts 9-17
Replacing a Part Replaceable Parts Table 9-8 Replaceable Parts Item Agilent Part Number C Qty.
Replacing a Part Replaceable Parts 9-19
Replacing a Part Replaceable Parts Table 9-9 Replaceable Parts Item Agilent Part Number C D Qty. Description Mfr. Code Mfr.Part Number 3 08922-61011 8 1 AY-FRAME, (CHASSIS). 28480 08922-61011 12 08922-00004 1 1 CRT BRACKET 28480 08922-00004 114 08922-00030 3 1 BRACKET-REG, PCA 28480 08922-00030 115-117 0515-1950 4 3 SCREW MACH M3 X .5 00000 ORDER BY DESCRIPTION 118 0515-0380 2 1 SMM4.
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 493498 506521 244 499501 Washer 458 (Opt.
Replacing a Part Replaceable Parts Table 9-10 Replaceable Parts Item Agilent Part Number C D Qty. Description Mfr. Code Mfr.Part Number 21 0515-0456 3 1 SMM4.0 20MML 00000 ORDER BY DESCRIPTION 91-95 0515-1860 5 1 SCREW 1.5 FM 3.5 TX 00000 ORDER BY DESCRIPTION 96-100 3050-0227 3 5 WASHER .
Replacing a Part Replaceable Parts 9-23
Replacing a Part Replaceable Parts Table 9-11 Replaceable Parts Item Agilent Part C D Qty. Description Number Mfr. Code Mfr.Part Number 22,23, 112,113 0515-0380 2 4 SMM4.0 10SEMPNTX 00000 24,25 0515-2126 8 2 SMM3.0 6SEMPNTX 00000 ORDER BY DESCRIPTION 83-86, 104-107 0515-1331 5 8 SCREW M4 X 6 00000 ORDER BY DESCRIPTION 87-90 0515-1860 5 4 SCREW 1.5 FM 3.5 TX 00000 ORDER BY DESCRIPTION 268-270 0515-1950 3 4 SCREW M3 X .
Replacing a Part Replaceable Parts Table 9-12 Replaceable Parts Item Agilent Part Number C D Qty. Description Mfr. Code Mfr.Part Number 79-82, 108-111 0515-1331 1 8 SCREW M4 X 6 00000 ORDER BY DESCRIPTION 203,204 0515-0380 2 2 SMM4.0 10SEMPNTX 00000 ORDER BY DESCRIPTION 561 0515-0380 2 1 SMM4.
Replacing a Part Replaceable Parts Table 9-13 Replaceable Parts Item Agilent Part Number C Qty. Description D Mfr. Code Mfr.Part Number 209 08922-00005 2 1 PLATE REAR PANEL (A Only) 28480 08922-00005 209 08922-00073 4 1 PLATE REAR PANEL (A Only) 28480 08922-00073 211,212 0380-2079 3 2 CONN SCREWLOCK 00000 ORDER BY DESCRIPTION 213-221 2950-0035 8 9 NUT-HEX (A/G Only) 00000 ORDER BY DESCRIPTION 222-230 2190-0102 8 9 WASHER LK.
Replacing a Part Replaceable Parts ( 9-27
Replacing a Part Replaceable Parts Table 9-14 Miscellaneous Replaceable Parts Item C D Qty. Description Mfr. Code Mfr.
Replacing a 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 8922A, B, E, G, F, H, S The firmware for the HP/Agilent 8922A,B,E,G,F,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.
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.
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.
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 the 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.
12 Module I/O Specifications 12-1
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.
Module I/O Specifications A2 Audio Analyzer 2 A2 Audio Analyzer 2 Use extender card 08920-60142 Power Supplies +5 V J1(21,22) 200 mA +12 V J1(19) 80 mA -12 V J1(20) 80 mA 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 — FIL_AUD J1(12) Input Z 1 M Ω DC Coupled Voltage Range ± 5 Vp From Modulation Distribution Board Selected Input — MOD_MON J1(16) Input Z 100 kΩ DC Coupled DC AUDIO INPUT From A3 Audio Analyz
Module I/O Specifications A2 Audio Analyzer 2 Outputs AUDIO OUT MEAS MUX To A19 Measurement Board AUD2_VM J1(11) Selected path = POS/NEG peak detectors. Input = FILT_AUD Response Time < 1 ms (Rise time) DC Offset < ± 15 mV Detector Range 0.424 to 5 V Peak Selected path = Pre Notch RMS detectors. Input=FILT_AUD Specified Meas. Range 0.296 to 1.67 Vrms Selected path = Post Notch RMS detectors.
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.
Module I/O Specifications A3 Audio Analyzer 1 Outputs To Audio Analyzer 2 FIL_AUD J1(15) Output Z <1Ω 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 % 0.02 to 25 kHz ± 1.05 % 0.02 to 75 kHz ± 7.7 % 0,20,40 dB, No Filters DC Offset < 13 mV 0 dB Gain < 1.3 V 40 dB Gain < .07% 1 kHz Rate, 15 kHz BW. THD + Noise Selected Inputs (AUD_IN_HI,AUD_IN_LO) Total Path Accuracy .02 to 12 kHz ± 0.704 % .02 to 25 kHz ± 1.3 % .
Module I/O Specifications A3 Audio Analyzer 1 To A19 Measurement Board AUD1_VM J1(16) Output Z >1Ω DC Offset < ± 9 mV Unity Gain buffer Selected input =Range/Over-voltage detector Response Time < 1 ms (Rise time) DC Offset ± 15 mV Specified input range .29 to 5 Vp ± 2% Accuracy 20 Hz to 50kHz B.W. (3 dB) 20 Hz to >200 kHz. Selected input = DC Audio Path Filter 3 dB BW 2.1 Hz Step Response (1%) <400 ms DC Offset ± 21 mV Uncalibrated DC Offset ± .
Module I/O Specifications A4 Modulation Distribution A4 Modulation Distribution Use extender card 08920-60141 Power Supplies +12 V J1(29) 120 mA + Audio Output Drive +5 V J1(33,34) 12 mA -12 V J1 (30) 120 mA + Audio Output Drive GND (Analog) J1(27,28) GND (Digital) J1(35,36,37) Inputs From Front Panel BNC input EXT_MOD J1(1) Input Z 600 Ω Max Input Level 15 Vp Full Scale Input 1 Vp From A6 Signal Source/Analyzer AFG1 J1(11), AFG2 J1(13), AFG_GND J1(12) Input Z 13.
Module I/O Specifications A4 Modulation Distribution Outputs To Front Panel BNC AUDIO_OUT_HI J1(7) Output Z <1 Ω Maximum Output Voltage 5 Vrms OpenCircuit Max Output Current 40 mA Peak Hardware spec. 20 mA peak Spur Requirements Full Scale Gain (Uncal) 5.953 ± 1.51% LFS1/2 to FP, DAC=255, 600 Ω Load. Attenuator Accuracy ±.02 dB (DC) (20,40,60 dB) The output of AUDIO_OUT_HI can be set on the RF Analyzer page.
Module I/O Specifications A5 Premodulation Filter and NSM A5 Premodulation Filter and NSM Use extender card 08922-60132. Power Supplies +15 V J1(12) J2(20) TP 2 15 mA -15 V J1(11) J2(23,24) TP 3 15 mA +5 V J1(15,16) J2(23,34) TP 1 1.1 A -5 V J1(19) TP 4 5 mA 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) TP 5 Inputs From A34 GSM-RTI Assembly PMF_CLK J1(5) Level: TTL Frequency: 270.
Module I/O Specifications A5 Premodulation Filter and NSM From A34 GSM-RTI Assembly PMF_DATA J1(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.
Module I/O Specifications A5 Premodulation Filter and NSM Figure 4-1 Typical Oscilloscope Display Channel 1 = 500.0 mvolts/div Timebase = Ch. 1 Parameters Rise Time = Frequency = + Width = Overshoot = RMS Volts = 20.0 ns/div 13.660 ns 17.3310 MHz 32.710 ns 250.0 mvolts 2.343 volts Offset = 1.810 volts Trigger mode: Delay P-P Volts Fall Time Period - Width Preshoot Duty Cycle = = = = = = = Trigger Levels Chan1 = 1.810 volts Holdoff = 70.000 ns 0.000 s 3.187 volts 7.540 ns 57.700 ns 24.990 ns 187.
Module I/O Specifications A6 Signaling Source/Analyzer A6 Signaling Source/Analyzer Use extender card 08920-60140. Power Supplies +12 V J1(9) 21 mA +5 V J1(37,39,40) 650 mA -12 V J1(10) 41 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 41.6 k Minimum Input Level 0.2 Vpk Maximum Input Level 5 Vpk Analyzer timebase 12 MHz ± 0.
Module I/O Specifications A6 Signaling Source/Analyzer Outputs To A4 Modulation Distribution Assembly AFG1 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 = 5V/4096) Output Lvl Acc (Uncal) ± 0.0183% F.S. Output Channel Clock 838.8608 kHz Output Impedance 1.336 k Ω (680 pF Shunt ) THD+Noise (Sine) 0.10% (Output = 2.
Module I/O Specifications A9 Global Test and Demod A9 Global Test and Demod Use extender card 08922-60133. Power Supplies +15 V J2(29,30) - TP 15 140 mA -15 V J2(25,26) 80 mA +5 V J2(23,24) 1.0 A -5 V J2(21,22) 20 mA Ground J1(1,33,4,17,18,20) J3(1-4,6-14,16-20) - TP 14/16 Inputs From A16 Receiver 10.7M_IF J1(7) Frequency: 10.7 MHz ± 50 kHz Level: 3 dBm ± 1 dB Harmonics: <- 40 dBc The 10.7 MHz is orginated from the A16 Receiver.
Module I/O Specifications A9 Global Test and Demod Figure 4-2 Expected Output Channel 1 = 500.0 mvolts/div Timebase = Ch. 1 Parameters Rise Time = Frequency = + Width = Overshoot = RMS Volts = 12-16 20.0 ns/div 27.540 ns 10.6998 MHz 46.790 ns 31.25 mvolts 482.0 volts Offset = -50.00 volts Trigger mode: Delay P-P Volts Fall Time Period - Width Preshoot Duty Cycle = = = = = = = Trigger Levels Chan1 = -50 mvolts Holdoff = 70.000 ns 0.0000 s 1.468 volts 27.000 ns 93.460 ns 46.670 ns 93.
Module I/O Specifications A9 Global Test and Demod From A15 Reference Section 20M_REF_A J1(11) Wave Shape: Sine Frequency: 20 MHz ± 1 ppm Requires Ext Ref of 1 ppm Level: > 0 dBm (500 mVrms) Harmonics: < -25 dBc Spurs (> 5 kHz offsets): < -110 dBc Figure 4-3 on page 12-17 shows the expected oscilloscope reading. This signal can also be clearly seen on a spectrum analyzer. Figure 4-3 Expected Display Channel 1 = 200.0 mvolts/div Timebase = Ch.
Module I/O Specifications A9 Global Test and Demod Output to Rear Panel System Bus F_CNT 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. Figure 4-4 Typical Display Channel 1 = 1.000 volts/div Timebase = Ch.
Module I/O Specifications A11 Receiver Mixer A11 Receiver Mixer No extender card required. Power Supplies +5 V PC1 GND Chassis 70 mA Inputs From A23 Input Section 1st_MIX_IN J2 NOTE: Frequency Range 0.4 to 1000 MHz Level - using known reference connected to RF IN/OUT -20 dB compared to reference setting Ensure the reference setting and RF Analyzer are set to the same frequency.
Module I/O Specifications A11 Receiver Mixer Figure 4-5 Typical Display Channel 1 = 130.0 mvolts/div Timebase = Ch. 1 Parameters Rise Time = Frequency = + Width = Overshoot = RMS Volts = 12-20 875 ps/div 410 ps 714.286 MHz 690 ps 0.0000 volts 135.7 mvolts Offset = 0.000 volts Trigger mode: Delay P-P Volts Fall Time Period - Width Preshoot Duty Cycle = = = = = = = Trigger Levels Chan1 = 0.000 volts Holdoff = 70.000 ns 0.0000 s 387.5 mvolts 420 ps 1.40 ns 710 ps 0.000 volts 49.
Module I/O Specifications A11 Receiver Mixer Outputs To A16 Receiver 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 I.F. ± 1.5 dB 114.3 MHz I.F. ± 1.5 dB IF Filter 114.3 MHz Center 114.3 ± 5 MHz B.W. (1 dB) 40 MHz ± 5 MHz Rejection > 35 dB +885 MHz IF Filter 614.3 MHz NOTE: Center 614.3 ± 0.1 MHz Adjustable. B.W. (1 dB) 10 MHz ± 0.
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.
Module I/O Specifications A13 Output From A4 Modulation Distribution AM_MOD J2(7) Input Z 25 k Ω Sensitivity 25% AM / V 5000 pF parallel shunt. See "A4 Modulation Distribution", page 12-8 for measurement procedure. Outputs To A12 Pulse Attenuator (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 MHz 0.
Module I/O 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 V J2(2) -15 V J2(3) +5 V J2(4) Ground J3(1-2,4-8,10-16,18-20) J1(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.
Module I/O Specifications A14 Pulse Driver Outputs To 13 MHz output on Rear Panel 13M_REF_OUT_A P3(17) Waveshape: Sine Level: >7.5 dBm Nominal Output Impedance: 50 Ω Amplitude 3.75 Vp-p 1.7 Vrms To A34 RTI Assembly 13M_REF_OUT_B Waveshape: Frequency and Harmonics Level: >7.5 dBm Amplitude 5.
Module I/O Specifications A15 Reference A15 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 +15 V J2(2) 90 mA -15 V J2(3) 60 mA +5 V J2(4) 400 mA Ground J3(3,6-8,10-12,14-16,18-19) J1(1-2,4-8,10-12,14-16,18-20) Inputs From Rear Panel 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: 50 Ω Signal Level: Between -2.
Module I/O Specifications A15 Reference Hop Control To A33 Hop Controller J2(5,8,9) Levels: TTL Clock Rate: ≅ 180 kHz (bursts) Amplitude +5 Vdc Outputs To Rear Panel EX_10M_REF_OUT J1(13) Waveshape: Sine Harmonics: <-25 dBc Signal Level: >+7.
Module I/O Specifications A15 Reference 4.8 Vp-p 200 ns Figure 4-6 800 ns Typical Display To A14 Pulse Driver 1M_REF_C J3(2) Frequency: 1 MHz ± 5 Hz Levels: CMOS Duty Cycle: 800 ns low, 200 ns high Amplitude ≅ 1 Vdc Waveshape square wave (not a true square wave) Duty Cycle 20% See Figure 4-7 on page 12-28 5.
Module I/O Specifications A15 Reference To A18 Spectrum Analyzer SA_20M_REF J3(5) Frequency: 20 MHz ± 100 Hz Waveshape: Sine Harmonics: <-25 dBc Subharmonics: <-30 dBc Signal Level: >+3 dBm (+10 dBm typical) Spurious at >5 kHz offsets: <-70 dBc Amplitude 1 Vrms 2.
Module I/O Specifications A15 Reference To A5 Premodulation Filter and NSM 10M_REF_B J3(17) Frequency: 10 MHz ± 50 Hz Waveshape: Sine Signal Level: >+10 dBm Harmonics: <-25 dBc Spurious at >5 kHz offsets: <-70 dBc For measurement procedure and waveform, refer to "A5 Premodulation Filter and NSM", page 12-10.
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. To A16 Receiver Assembly 500M_REF J1(17) Frequency: 500 MHz ± 2.5 kHz Waveshape: Sine Signal Level: 0 dBm ± 2 dB Harmonics: <-25 dBc Spurious at >5 kHz offsets: <−60 dBc Residual FM 0.
Module I/O Specifications A16 Receiver A16 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 V -15 V +5 V Ground J2(2) J2(3) J2(4) J1(1-2,4-6,8,10-12,15-20) J3(1-2,4-8,10-12,14-20) 380 mA 80 mA 100 mA Inputs From A33 Hop Controller Hop Control P(2,5,8) Levels: Clock Rate: TTL ≅ 180 kHz (bursted) From A15 Reference 500M_REF P3(3) Freq: 500 MHz ± 2.
Module I/O Specifications A16 Receiver Outputs To A9 Global Test and Demod UNMUTED_FM J1(14) 20 µV/Hz Sensitivity into ≥ 100 k Ω load: Max Deviation: Amplitude Figure 4-8 100 kHz peak 1.8 Vdc See Figure 4-8 on page 12-33 Typical Display To Front Panel PULSE_DEMOD J1(7) Level Pulse ON into open circuit: +2 V Level Pulse OFF: 0V Output Impedance: 600 Ω 10-90% Rise/Fall time: <2.
Module I/O Specifications A16 Receiver To Front Panel FM_DEMOD J1(13) Sensitivity into open circuit: 20 µV/Hz Output Impedance: 600 Ω Max Deviation: 100 kHz peak Accuracy DC to 270 kHz: ± 5% Sensitivity into oscilloscope 325 µV/Hz To test FM Demod apply RF Carrier with FM modulation to RF Input, measure FM Demod on oscilloscope. NOTE: Ensure correct settings on RF Analyzer page (frequency/amplitude).
Module I/O Specifications A16 Receiver To A18 Spectrum Analyzer SA_114.3_M J3(13) Frequency: 114.
Module I/O 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 J2(2) 165 mA -12 V J2(3) 300 mA +5 V 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.
Module I/O Specifications A18 Spectrum Analyzer From A19 Measurement Assembly SWP_STRT J1(6) Levels: CMOS High = Sweep Start Low = Sweep Stop CLK_REF_SA J2(8) Serial Bus E/I_SA J2(9) to/from A33 DAT_REF_SA J2(5) Hop Controller Levels: TTL Clock Rate: ≅ 80 kHz (bursts) Outputs To A19 Measurement Assembly SA_SCPT J1(7) Output Impedance: 100 Ω 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.
Module I/O Specifications A19 Measurement A19 Measurement Use extender card 08920-60138.
Module I/O Specifications A19 Measurement Inputs Voltmeter Multiplexer +5 J2(24,21) J1(15,16) +12 J2(26) - 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 RI_VM_ID J3(10) RI_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 A6 LFS2_VM J3(20) - FM SIG Source/
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 > 1 M Ω (No capacitance) DC Offset < 100 mV Uncalibrated AD Ref Voltage 2 ± .10 V (Full 8 Bits) Sample Rate 10 Mega Samples/S — in bursts Max Input Voltage 10.
Module I/O Specifications A19 Measurement Counter Inputs AUDIO1_CNT J1(6) - FM Audio Analyzer 1 A3 RI_CNT J1(8) IN_CNT J1(5) - From Input Section A23 IF_CNT J1(9) - From Global Board A9 TIME BASE REF 20 MHz J3(29) MIXED_IF 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.
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_SCP_TRIG HCMOS (Vih > 4 V, Vil < 1 V) RI_SCP_TRIG HCMOS EXT_TRIG HCMOS Maximum Input ± 15 V EXT_TRIG 12-42
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 V J6(9) 215 mA +5 V J6(12) 15 mA -12 V J6(10) 190 mA +12 V Aux J6(5) 206 No relays 220 mA With relays 360 mA + Prescaler 460 mA 20 mA J6 (11) 43.5 Inputs From Front Panel AUX RF INPUT J3 Freq Range .4 to 1000 MHz Max Meas Level .
Module I/O 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). .4 MHz Loss < 1 dB 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 .
Module I/O Specifications A23 Input (HP/Agilent 8922A.B,E,F,G,H) Only To A11 Receiver Mixer 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.
Module I/O Specifications A23 Input (HP/Agilent 8922A.B,E,F,G,H) Only To A19 Measurement Assembly IN_VOLT J6(15) AUTO_RNG_DET Output Level AUTO_RNG_ALC Range TEMP_DET Prescaler AGC RF peak detector voltage. 4.71 ± .5 V When AGC has active control. Prescaler AGC modulator control voltage. 0 to + 4 V Temperature sensor voltage. Nominal Output 2.98 ± .1 Volts @ 25 Deg C Sensivitity 10 mV / C DUPLEX_DET Duplex port RF peak detector Voltage.
Module I/O Specifications A23 Input (Agilent 8922M/S Only) A23 Input (Agilent 8922M/S Only) NOTE: Applies to Electronic Attenuator only. No extender card required. Power Supplies +12 V J6(9) 226 mA max +5 V J6(12) 15 mA -12 V J6(10) 286 mA max +12 V Aux J6(5) 360 mA max 43.5 20 mA J6 (11) Inputs From Front Panel AUX RF INPUT J3 Freq Range 20 to 1000 MHz Max Meas Level .
Module I/O Specifications A23 Input (Agilent 8922M/S Only) Outputs From Front Panel 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 < 6 dB 1000 MHz Loss < 8 dB Relative path loss with respect to siggen input,atten 5 to 125 dB. 20 MHz Loss < 3 dB 1000 MHz Loss < 3 dB To A19 Measurement Assembly DET LO J6(14) Meas Freq Range 90 to 1000 MHz Output level (Uncal) OFFSET VOUT (LOW) 100 mV +- 50 mV No input Power.
Module I/O Specifications A23 Input (Agilent 8922M/S Only) To A19 Measurement Assembly IN_VOLT J6(15) TEMP_DET Temperature sensor voltage. Nominal Output 2.98 ± .1 Volts @ 25 Deg C Sensivitity 10 mV / 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.
Module I/O 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 +5 V 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.
Module I/O Specifications A25 Sum Loop From A26 Step Loop A STEP_LP_OUT/A 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 Timebase = Ch. 1 Parameters Rise Time = Frequency = + Width = Overshoot = RMS Volts = 500 ps/div 590 ps 483.092 MHz 1.060 ns 0.0000 mvolts 1.
Module I/O Specifications A25 Sum Loop To A13 Output SGS_500_1000M J1(3) Frequency: 500 to 1015 MHz Level: 0 dBm ± 2 dB Harmonics: < -20 dBc Spurious >5 kHz offset: < -60 dBc Change frequency on RF Generator page. Select modulation types on or off. On spectrum analyzer, GMSK Modulation can be seen between centre frequency and first harmonics by level of increased noise floor.
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 +15 V J2(2) 250 mA -15 V J2(3) 100 mA +5 V J2(4) 450 mA Ground J1(1-2,4-20) J3(1-2,4-20) Inputs From A15 Reference 1M_REF_A/B P3(3) Frequency: 1 MHz ± 5 Hz Level: CMOS For measurement procedure refer to "A15 Reference", page 12-26.
Module I/O Specifications A17, A26 Step Loop From A33 Hop Controller Hop Control J2(5,8,9) Levels: TTL Clock Rate: 1 MHz (bursted) Levels Pin 5 Pin 8 Pin 9 5 Vdc -1.25 Vdc 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.
Module I/O Specifications A17, A26 Step Loop To A19 Measurement Board AUX1/2_VM J2(6) Voltage Range: -5 V to +5 V - typically +5 Vdc for default/Preset settings 12-55
Module I/O 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 V J2(2) 20 mA -15 V J2(3) 50 mA +5 V J2(4) 25 mA -5 V J2(1) 150 mA 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.
Module I/O Specifications A27 DAC/Upconverter Channel 2 = 500.0 mvolts/div Offset = 1.450 volts Trigger mode: Timebase = 50.0 ps/div Delay = 0.0000 s Delta T Start Delta V Vmarker1 = = = = Trigger Levels Chan1 = 1.450 volts Holdoff = 70.000 ns Stop = -246.500 ns Vmarker2 = 2.890 volts 1.880 ps -248.380 ns 2.470 volts 420.
Module I/O 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 ❒ Overvoltage protected. ❒ +21 Volts and +25 Volt supplies always on, all other supplies controlled with front panel power switch. ❒ Short circuit protected. ❒ Thermal shutdown capability.
Module I/O Specifications A33 Hop Controller A33 Hop Controller Power Supplies +15 V J21(100) < 5 mA -15 V J21(40,59,60,61,91,92) 0 mA (not used) +5 V 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 µA Low drive requirement: -1 mA Format: unsigned binary, high = 1 From Rear Panel TX_HOP J21(4) Amplitude: TTL levels High drive requirement: 100 µA Low drive requirement: -2 mA Tri
Module I/O Specifications A33 Hop Controller From Rear Panel RX_HOP J21(3) Amplitude: TTL levels High drive requirement: 100 µA Low drive requirement: -2 mA Triggered by: Rising edge From Rear Panel SEQ_HOP J21(2) Amplitude: TTL levels High drive requirement: 100 µA Low drive requirement: -2 mA Triggered by: Rising edge From Rear Panel SEQ_HOP_RESET J21(1) Amplitude: TTL levels High drive requirement: 100 µA Low drive requirement: -2 mA Active Level: Low RESET_SELECT J21(19) Amplitu
Module I/O Specifications A33 Hop Controller Front Panel Input PULSE_MOD_IN J21(68) ON latency: ≅ 25 µS OFF latency: ≅ 10 µS Amplitude: TTL levels High: No attenuation of sig gen output Low: Attenuate sig gen output High drive requirement: 100 µA Low drive requirement: -1 mA 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_SW0/2 J21(71,72,73) Ampl
Module I/O 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 & 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 Rcvr) REFERENCE SECTION J21(31,33,32) SPECTRUM ANALYZER J21(31,33,38) (Clk & data shared with ref) MODULATION DISTRIBUTION J21(53,54,52) A
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.
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.
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.
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 and 2 are common to all HP/Agilent 8922 instruments.
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.
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.
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 A11 Receiver Mixer assembly from the A16 Receiver assembly. It is then possible to measure the dc voltages with an external voltmeter or using a blocking capacitor, a spectrum analyzer can be connected to view the RF signal from the mixer.
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.
Block Diagram Theory of Operation Block Diagram 1 two analyzer modules provide gain, attenuation, and distribution functions of the audio signals. The A19 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.
Block Diagram Theory of Operation Block Diagram 2 Block Diagram 2 RF Generator AF Generator A15 Reference The A15 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.
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.
Block Diagram Theory of Operation Block Diagram 2 necessary to do manual troubleshooting to find out if the A5 Premod Filter and NSM assembly is correctly locking to these other clock signals. By using the service screen and viewing the latch (NSM_PMF_CLK), it can be determined if the loop is locked. A “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.
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 the 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.
Block Diagram Theory of Operation Block Diagram 2 A12 Pulse Attenuator In addition to 0.3 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 > 80 dB of attenuation. The A12 Pulse Attenuator assembly allows “straight through” operation to simulate the RF carrier ON or it provides >80 dB of attenuation to turn the RF carrier OFF.
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.
Block Diagram Theory of 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.
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.
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.
Block Diagram Theory of Operation Block Diagram 5 Block Diagram 5 This block diagram illustrates the busses 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.
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.
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 test checks the A4 Modulation Distribution assembly.
Diagnostics Theory AF_DIAGS Audio Analyzer 1 Internal Paths This test checks the A3 Audio Analyzer 1 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 1 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.
Diagnostics Theory RF_DIAGS RF_DIAGS 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.
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 Generator 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.
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 referenced 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.
Diagnostics Theory RF_DIAGS RF Detectors 1 The low and high sensitivity detectors are checked both with 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.
Diagnostics 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.
Diagnostics Theory RF_DIAGS Down Converters (With Spectrum Analyzer) Test The RF generator is fed to the receiver IF through the A23 Input and A11 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.
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.
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. The 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.
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.
Diagnostics Theory Interpreting Results This Page Intentionally Left Blank 15-14
16 Measurement Theory 16-1
Measurement Theory Introduction Introduction This chapter describes which blocks of the instrument are used in the various measurements. The measurements described include the following: • BIT ERROR • DSP ANL • OUT RF SP • PULSE • CW MEAS/AF ANL • SCOPE • SPEC ANL The descriptions are given in terms of which path the signal under test takes from the front panel to the measurement point.
Measurement Theory Introduction DSP ANL • A23 Input • A11 Receiver Mixer • A16 Receiver • A9 Global Test and Demod The DSP analyzer 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.
Measurement Theory Introduction CW MEAS/AF ANALYZER • A23 Input • A19 Measurement • A11 Receiver Mixer • A16 Receiver • A3 Audio Analyzer 1 • A2 Audio Analyzer 2 • A4 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.
Measurement Theory Introduction assembly digitizes the signals from the A18 Spectrum Analyzer assembly. After the measurement is done the measurement numbers are sent to the A7 Controller to be sent to the display section.
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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.
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.
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 1 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.
Index Symbols ”B” 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 A1 part number, 9-4, 9-5 troubleshooting, 5-2 A1 Front Panel removal, 8-7 A10 part location, 9-7 A10 Power Supply Regulator Removal, 8-9 A11 part location, 9-7 part number, 9-6 specs, 12-19 theory, 14-5 A12 part location, 9-7 p
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 A3 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 spe
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, 142 block diagrams, 13-2 C calibration 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
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 Mod
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 I
Index Index-6
