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HP 8560A Manuals

Manuals and User Guides for HP 8560A. We have 1 HP 8560A manual available for free PDF download: Service Manual

HP 8560A Service Manual

HP 8560A Service Manual (450 pages)

Spectrum Analyzer

Brand: HP | Category: Measuring Instruments | Size: 8.18 MB

Table of Contents

Table of Contents

6
- General Safety Considerations
  4
- Safety Symbols
  4
- General Information
  19
  - Manual Organization
    19
  - Recommended Test Equipment
    19
  - Manual Text Conventions
    20
  - Serial Numbers Covered by this Manual
    20
  - Instrument Variations
    21
  - HP 85629B Test and Adjustment Module
    24
  - Service Kit
    24
  - Recommended Test Equipment
    24
  - Electrostatic Discharge
    25
    
    Reducing Potential for ESD Damage
    25
    
    Static-Safe Accessories
    26
  - Returning Instruments for Service
    26
    
    Original Packaging
    26
    
    Other Packaging
    26
    
    Service Tag
    26
  - HP 8560A Shipping Container and Cushioning Materials
    28
  - Sales and Service Offices
    29
  - Recommended Test Equipment
    31
Adjustment Procedures

35
Assembly Replacement

108
- Access to Internal Assemblies
  109
- Access to Internalassemblies
  109
- Cable Color Code
  109
  - Procedure 1. Analyzer Cover
    110
- Hinged Assemblies
  110
- A2, A3, A4, and A5 Assembly Removal
  121
- Assembly Cables (1 of 2)
  122
- Assembly Cables (2 of 2)
  123
- Coaxial Cable Clip
  124
- HP-IB and Alal Wl Cable Placement
  125
  - Procedure 6. A6 Power Supply Assembly
    126
- A6 Power Supply Connections
  127
- Power Supply Cover
  128
  - Procedure 7. A6Al High Voltage Assembly
    129
- Al7 CRT Driver Mounting Screws
  130
  - Procedure 8. A7 through Al3 Assemblies
    132
- Assembly Locations
  133
  - RF Section Bias Connections
    134
  - A7 1St lo Distribution Amplifier
    135
  - A8 Low Band Mixer
    136
  - A9 Input Attenuator
    137
- A9 Mounting Screws at Right Frame
  137
  - A10 Tracking Generator (Option 002)
    138
  - A10 Tracking Generator
    138
  - A10 Tracking Generator Mounting Screws
    138
  - Allyto
    139
  - All YTO
    139
- All Mounting Screws
  139
  - Al3 Second Converter
    140
  - Procedure 9. Al4 and Al5 Assemblies
    141
- Al4 and Al5 Assembly Removal
  141
- Al4 and Al5 Assembly Cables
  143
  - Procedure 10. Al7 CRT Driver
    144
- Al7 Mounting Screws
  144
  - Procedure 11. Bl Fan
    145
  - Procedure 12. Btl Battery
    146
  - Procedure 13. Rear Frame/Rear Dress Panel
    147
- Main Deck Screws
  148
  - Procedure 14. W3 Line Switch Cable
    151
- W3 Dress and Connection to A6 Power Supply
  152
- Line Switch Mounting Screw and Cable Dress
  153
- W3 Cable Connector
  154
- Side Frame Mounting Screws
  156
  - Procedure 15. EEROM (A2U501)
    157
- A21 OCXO Mounting Screws
  158
  - Procedure 16. A21 OCXO (Option 003)
    158
- Replaceable Parts
  159
Major Assembly and Cable Locations

196
- Introduction
  196
- Hinged Assemblies
  199
- Top View (A2 Unfolded)
  199
- Top View (A2 and A3 Unfolded)
  200
- Top View (A2, A3, A4, and A5 Unfolded)
  201
- Bottom View (Al5 Unfolded)
  202
- Bottom View (Al5 and Al4 Unfolded)
  203
- Front End
  204
- Rear View
  205
- General Troubleshooting
  
  206
  - Introduction
    206
    
    Assembly Level Text
    206
    
    Block Diagrams
    206
    
    Assembly Test Points
    207
    
    Pad
    207
    
    Ribbon Cables
    207
    
    Test Jack
    207
  - Ribbon Cable Connections (1 of 2)
    209
    
    WR PROT/WR ENA Softkey Menus
    211
  - WR ENA Softkey Menu
    212
  - Troubleshooting to a Functional Section
    213
- Assemblies
  
  214
  - Alal Keyboard
    214
  - A2 Controller
    214
  - A3 Interface
    214
  - A4 Log Amplifier/Cal Oscillator
    214
  - A6 Power Supply
    214
  - A8 Low Band Mixer
    214
  - A10 Tracking Generator
    214
  - Using the TAM
    215
    
    Diagnostic Functions
    215
    
    Revision Connectors
    216
    
    TAM Requirements
    216
    
    Test Connectors
    216
    
    Adc/Interface Check
    217
    
    Automatic Fault Isolation
    217
    
    Blank Display
    217
    
    Controller Check
    217
    
    Display/Power Supply
    217
    
    Erroneous Results
    217
    
    Inconsistent Results
    217
    
    IF/LOG Check
    218
    
    LO Control Check
    218
    
    Manual Probe Troubleshooting
    218
    
    RF Check
    218
    
    Cal Osc. Troubleshooting Mode
    219
  - Error Messages
    220
    
    Viewing Multiple Messages
    220
    
    Error Message Elimination
    221
    
    System Analyzer Programming Errors (100 to 150)
    221
    
    ADC Errors (200 to 299)
    222
    
    LO and RF Hardware/Firmware Failures (300 to 399)
    223
    
    Roller PLL Errors (302 to 316)
    223
    
    YTO Loop Errors (300 to 301)
    223
    
    Roller Oscillator Errors (321 to 329)
    225
    
    YTO Loop Errors (317 to 318)
    225
    
    600 Mhz Reference Loop (333)
    226
    
    YTO Loop Errors (331)
    226
    
    Automatic if Errors (400 to 599)
    227
    
    Sampling Oscillator (335)
    227
    
    YTO Leveling Loop (334)
    227
    
    Digital and Checksum Errors (700 to 799)
    236
    
    EEROM Checksum Errors (700 to 704)
    236
    
    System Errors (600 to 651)
    236
    
    Program ROM Check-Sum Errors (705 to 710)
    237
    
    Battery Problem (718)
    238
    
    Microprocessor Error
    238
    
    RAM Check Errors (711 to 719)
    238
    
    Model Number Error (719)
    239
    
    System Errors (750 to 757)
    239
  - Option Module Errors (800 to 899)
    239
  - User-Generated Errors (902 to 904)
    239
  - Block Diagram Description
    240
    
    Functional Sections
    240
    
    A7 Loda
    241
    
    A8 Low Band Mixer
    241
    
    A9 Input Attenuator
    241
    
    Al3 Second Converter
    241
    
    Al4 Frequency Control
    241
    
    Al5 RF
    241
    
    All YTO
    241
    
    Allyto
    241
    
    RF Section
    241
    
    A15Al Second if Distribution Amplifier (P/O A15)
    242
    
    Al3 Second Converter
    242
    
    Flatness Compensation Amplifiers (P/O A15)
    242
    
    Sweeping the First lo
    242
    
    Synthesizer Section
    242
    
    Third Converter (P/O A15)
    242
    
    Offset Lock Loop (P/O A15)
    243
    
    Reference PLL (P/O A15)
    243
    
    YTO PLL (A7, All, P/O A14, P/O A15)
    243
    
    A4 LOG Amplifier/Cal Oscillator Assembly
    244
    
    IF Section
    244
    
    Phase Lock Loops
    244
    
    Roller Oscillator PLL (P/O A14)
    244
    
    A5 if Assembly
    245
    
    Adc/Interface Section
    246
    
    Adc
    247
    
    Controller Section
    247
    
    Log Expand/Video Functions (P/O A3)
    247
    
    Triggering
    247
    
    A6 Power Supply
    248
    
    Al7 CRT Display Driver
    248
    
    Display ASM
    248
    
    Display/Power Supply Section
    248
    
    Eerom
    248
    
    Firmware
    248
Table of Contents

254
- Troubleshooting Using the TAM
  257
- Keyboard/Rpg Problems
  260
  - Keyboard Interface
    260
  - Keyboard Matrix
    260
  - RPG Interface
    261
- Triggering Problems
  262
  - Counter Frequencies
    262
  - Trigger MUX Truth Table
    262
- Flatness Control (RF Gain Dacs)
  264
- A3 Assembly's Video Circuits
  265
  - Log Offset/Log Expand
    267
  - Video MUX
    268
  - Video Filter
    268
  - Video Filter Buffer Amplifier
    269
  - A3U102 Latch Outputs
    269
  - Positive/Negative Peak Detectors
    270
  - Peak Detector Reset
    271
  - Rosenfell Detector
    271
  - HMUX-Selo/L Versus Detector Mode
    271
  - Adc Mux
    272
  - Logic Levels at A3U108
    273
  - Variable Gain Amplifier (VGA)
    274
    
    Track and Hold
    274
  - A3 Assembly's ADC Circuits
    275
    
    ADC Control Signals
    275
    
    ADC Start/Stop Control
    276
    
    Adc
    277
    
    Ramp Counter
    278
  - A3 Assembly's Control Circuits
    279
    
    Analog Bus Drivers
    279
    
    Analog Bus Timing
    280
- Demultiplexer A3U410 Truth Table
  281
- Demultiplexer A3U500 Truth Table
  281
  - Interface Strobe Select
    281
The if Section Contains the A4 Log Amplifier/Cal Oscillator and A5 if Assemblies.

283
- A4 and A5 Test Connectors
  285
- IF Section
  285
- Troubleshooting Using the TAM
  285
- Automatic Fault Isolation References
  286
  - Troubleshooting A4 Log Amplifier with the TAM
    286
  - Troubleshooting A5 with the TAM
    286
- TAM Tests Versus Test Connectors (1 of 2)
  287
- TAM Tests Versus Test Connectors (2 of 2)
  288
  - IF Section Troubleshooting with TAM
    289
  - Troubleshooting A4 Cal Oscillator with the TAM
    290
- Automatic if Adjustment
  291
  - Parameters Adjusted
    292
  - Requirements
    293
  - Available Reference Level Range
    294
  - Signal Level for Reference Level Display
    294
- Sweep Width Settings
  291
- Performance Test Failures
  294
  - IF Gain Uncertainty Performance Test
    294
  - Scale Fidelity Performance Test
    295
  - Resolution Bandwidths Performance Tests
    295
  - Log Amplifier
    296
  - Log Amplifier
    297
  - Linear Amplifiers
    297
  - Video Offset
    298
  - Video Output
    298
  - Frequency Counter Prescaler/Conditioner
    299
  - AM/FM Demodulator
    299
  - 4.8 Khz if Filters
    299
  - 4.8 Khz and 10.7 Mhz if Filters
    300
  - 10.6952 Mhz VCXO
    301
  - Input Switch
    301
  - LO Switch
    301
  - Synchronous Detector
    302
    
    Limiter
    302
- Isolation Amplifier
  302
  - Detector/Mixer
    302
    
    Log Gain Compensation
    303
    
    Log Offset Compensation
    303
    
    Log Offset/Gain Compensation
    303
    
    Video Mux
    303
  - A5 if Section
    304
  - IF Signature
    305
  - IF Adjust Signature
    308
  - Detailed if Adjust Signature (3)
    308
  - Detailed if Adjust Signature (5)
    309
    
    IF Signature
    310
  - Noisy Signature
    310
    
    Common if Signature Problems
    310
- Noise with Correct Shape
  311
- Region B Amplitude Variation
  311
- Region B Amplitude Offset
  312
  - Mhz Resolution Bandwidth Problems
    312
  - Faulty Crystal Short
    313
  - Faulty LC Pole
    313
    
    30 Khz Resolution Bandwidth Problems
    314
    
    Khz and 10 Khz Resolution Bandwidth Problems
    314
  - Faulty Crystal Symmetry
    315
    
    Step Gains
    315
- A4 Assembly's Cal Oscillator Circuit
  316
Troubleshooting Using the Tam

328
- TAM Tests Versus Test Connectors
  329
  - Blank Display
    329
- Digital Signature Analysis (DSA)
  331
- Display Problems
  331
  - Line Generators
    331
  - Blanking
    332
  - Line Generator Output Waveforms
    332
  - Blanking Waveforms
    333
- Display Jumbled or Trace off Screen
  334
  - Expanded Blanking Waveforms
    334
  - Switch Driver Waveform LCHAR
    335
  - Distorted X/Y Line Generator Waveforms
    336
  - Expanded X/Y Line Generator Waveforms
    336
  - Intensity
    337
  - Bad Characters or Graticule
    337
  - Normal X/Y Line Generator Waveforms
    337
  - Long Lines Dimmer than Short Lines
    338
  - Delta X Waveform
    338
- Analog Zero-Span Problems
  339
  - Delta y Waveform
    339
- Frequency-Count Marker Problems
  340
  - Frequency Counter
    341
  - Gate Times
    341
- State- and Trace-Storage Problems
  342
- Keyboard Problems
  343
Caution

345
- Confirming a Faulty Synthesizer Section
  346
  - L. Center Frequency Tuning Values
    347
  - L. YTO Loop Test Setup
    349
  - Sampler and Sampling Oscillator Test Setup
    350
  - Sampling Oscillator Test Frequencies
    351
  - Troubleshooting Test Setup
    351
  - Al4 and Al5 Test Connectors
    352
  - Troubleshooting Using the TAM
    352
  - YTO Frequency in TEST Position
    352
  - Automatic Fault Isolation References (1 of 2)
    353
  - Automatic Fault Isolation References (2 of 2)
    354
  - TAM Tests Versus Test Connectors
    355
  - General PLL Troubleshooting
    357
    
    PLL Locked at Wrong Frequency
    357
    
    Unlocked PLL
    357
    
    Unlocked PLL
    358
  - Sweep Signal Destination Versus Span
    359
  - Harmonic Mixing Number Versus Center Frequency
    359
  - Frequency Span Accuracy Problems
    359
    
    Determining the First lo Span
    359
    
    Confirming Span Problems
    360
    
    YTO Main Coil Span Problems (lo Spans >20 Mhz
    360
  - Settings of Sweep Switches
    361
    
    YTO FM Coil Span Problems (lo Spans 1.01 Mhz to 20 Mhz
    361
    
    Roller Oscillator Span Problems (lo Spans 51 Mhz
    362
  - Input to YTO FM Coil Driver
    362
  - Input to Main/Fm/Vco Sweep Switch
    363
  - Settings of Sweep Switches
    363
  - First lo Span Problems (All Spans)
    365
  - Unlockedyto PLL
    367
    
    Operation
    367
    
    Troubleshooting an Unlocked YTO PLL
    369
    
    Troubleshooting an Unlocked YTO PLL
    370
- YTO Frequency Errors with A14J23 on Pins 2 and
  372
- Voltages in FM Coil and Main Loop Drivers
  374
- Main Coil Coarse and Fine Dacs Voltages
  375
  - Unlocked Roller Oscillator PLL
    376
    
    Confirming an Unlocked Condition
    376
    
    Operation
    376
    
    Offset Oscillator PLL
    377
    
    Transfer Oscillator PLL
    379
    
    Main Oscillator PLL
    381
    
    Operation
    383
    
    Troubleshooting
    383
- Sampling Oscillator PLL Divide Ratios
  384
  - Unlocked Reference PLL
    386
    
    Operation
    386
    
    Troubleshooting
    386
    
    Third lo Driver Amplifier
    388
  - Sampler and Sampler if
    389
  - Sweep Generator Circuit
    391
  - Simplified Sweep Generator
    391
- Simplified Sweep Generator During Retrace
  392
- Simplified Synthesizer Section
  393
- Simplified Al4 Assembly Block Diagram
  394
- Simplified Al5 Assembly Block Diagram
  395
  - A21 OCXO (Option 003 Only
    396
Rf Section

399
- Harmonic/Spurious Outputs too High . . . . . . . . . . . . . . . . . 1
  399
- L. Al4 and Al5 Test Connectors
  400
  - Low Band Problems (50 Hz to 2.9 Ghz)
    402
  - TAM Tests Versus Test Connectors
    402
- Low Band Problems
  403
- A7 Loda (lo Distribution Amplifier)
  404
- A9 Input Attenuator
  405
- Attenuator Pin Values
  405
- 11-8 RF Section
  406
- Al3 Second Converter
  406
  - Synthesizer Section
    407
- Al4 Frequency Control Assembly
  407
  - A7 LODA Drive
    407
- Al5 RF Assembly
  408
  - Confirming a Faulty Third Converter
    408
  - A7 LODA Drive
    408
  - Confirming Third Converter Output
    409
  - Third Converter
    409
  - Flatness Compensation Control
    411
  - Control Latches
    411
  - SIG ID Oscillator
    411
  - 10 Mhz Reference
    412
- Mhz Reference at A15J302
  413
- Mhz TTL-Reference at U303 Pin 5
  414
- RF Section Mnemonic Table
  415
- A10 Tracking Generator (Option 002)
  416
  - Block Diagram Description
    416
  - Tracking Oscillator
    416
- Coupler
  416
- Modulator
  416
- Output Mixer
  416
- Pentupler
  416
- Upconverter
  416
- Bias Board
  417
- Output Amplifier
  417
- Output Goes Unleveled (ERR 900 or ERR 901)
  417
  - Excessive Residual FM
    418
    
    Flatness Out-Of-Tolerance
    419
    
    Vernier Accuracy Out-Of-Tolerance
    419
    
    Harmonic/Spurious Outputs too High
    420
    
    No Power Output
    421
    
    Power Sweep Not Functioning Properly
    421
Display/Power Supply Section

424
- L. Simplified Section Block Diagram
  425
- Wl Power-Cable Connections (1 of 2)
  426
- Automatic Fault Isolation References
  427
- Troubleshooting Using the TAM
  427
  - Blank Display
    428
  - Al7 Test Connector
    428
  - TAM Tests Versus Test Connectors . . . .
    428
- Wl Power-Cable Connections (2 of 2)
  427
- Blank Display
  429
  - Display Distortion
    430
  - Probe Power Socket
    430
- Focus Problems
  431
- Intensity Problems
  432
- A6 Power Supply Assembly
  434
  - Dead Power Supply
    434
  - Buck Regulator Waveform
    435
- Line Fuse Blowing
  436
  - Low Voltage Supplies
    436
- Supply Restarting Every 1.5 Seconds (Kick Start)
  436
  - High Voltage Supplies
    437
  - CRT Supply Dropping out
    438
  - Blanking Signal
    438
  - Buck Regulator Control
    439
  - DC-DC Converter Control
    439
  - Power up
    440
    
    A-L. HP 8560A Spectrum Analyzer Documented Assemblies
    445
    
    A-3. Al5 RF Assemblies Shipped with HP 8560As Serial Prefixed below 3029A
    448

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