Wiltron 68169A Manuals

Manuals and User Guides for Wiltron 68169A. We have 1 Wiltron 68169A manual available for free PDF download: Maintenance Manual

Wiltron 68169A Maintenance Manual

Wiltron 68169A Maintenance Manual (301 pages)

SYNTHESIZED SWEEP GENERATOR

Brand: Wiltron | Category: Portable Generator | Size: 4 MB

Table of Contents

Chapter 1 General Information

6
- Limitation of Warranty
  3
- Table of Contents
  6
- Description
  8
- Introduction
  8
- Scope of Manual
  8
- Identification Number
  9
- Related Manuals
  9
- Options
  10
- Startup Configurations
  11
- Calibration
  12
- Level of Maintenance
  12
- Repair
  12
- Troubleshooting
  12
- Preventive Maintenance
  13
- Static-Sensitive Component Handling Precautions
  14
- Recommended Test Equipment
  15
- Exchange Assembly Program
  17
- Replaceable Subassemblies and Parts
  17
  - Parts List
    18
Table of Contents

21
- Chapter 2 Functional Description
  
  26
  - 681Xxa Major Subsystems
    26
  - Digital Control
    26
  - Introduction
    26
  - Frequency Synthesis
    27
  - Front Panel
    27
  - Alc/Square Wave Modulation
    28
  - Analog Instruction
    28
  - Power Supply
    28
  - RF Deck
    28
  - YIG Driver
    28
  - Frequency Synthesis
    32
  - Inputs/Outputs
    32
  - Motherboard/Interconnections
    32
  - Phase Lock Loops
    32
  - Overall Operation
    33
  - Frequency Modulation
    36
  - RF Outputs 0.01 to 40 Ghz
    36
  - Sweep Mode of Operation
    36
  - Alc and Modulation
    37
  - ALC Loop Operation
    37
  - Square Wave Modulation
    40
  - A1 and A2 FRONT PANEL Pcbs
    41
  - Serial Interface
    41
  - Keyboard Interface
    43
  - LCD Control
    43
  - Line Switch Logic
    43
  - Optical Encoder
    44
  - A3 Reference Loop Pcb
    45
  - Oscillator Phase Locking
    45
  - Reference Frequency Outputs
    45
  - Reference Loop Oscillator
    45
  - Reference Loop Monitoring
    47
  - A4 Coarse Loop Pcb
    48
  - Coarse Loop Dividers
    48
  - Coarse Loop Mixer/If
    48
  - Coarse Loop Oscillator
    48
  - Oscillator Phase Locking
    49
  - Oscillator Pre-Tuning
    49
  - Serial Interface
    51
  - A5 Fine Loop Pcb
    52
  - Fine Loop Mixer/If
    52
  - Fine Loop Oscillator
    52
  - Local Oscillator Loop
    52
  - 10 Mhz Reference Input
    53
  - Reference Loop
    53
  - Fine Loop Monitoring
    55
  - Fine Loop Oscillator Phase Locking
    55
  - Fine Loop Oscillator Pre-Tuning
    55
  - Serial Interface
    55
  - A6 Square Wave Generator Pcb
    56
  - Generating Square Waves
    56
  - Generating 400 Khz
    57
  - Serial Interface
    57
  - A7 Yig Loop Pcb
    58
  - Power Amplifier/Divider
    58
  - IF Amplifier/Limiter
    59
  - Phase Detector
    59
  - Step Recovery Diode/Sampler
    59
  - A9 Pin Control Pcb
    60
  - ALC Modulator Driver
    60
    
    Control Pcb
    64
  - CPU Interface
    60
  - FEU PIN Drivers
    60
  - Step Attenuator/Relay Drivers
    60
  - Switched Filter PIN Drivers
    60
  - A9-1 Pin Control Pcb
    65
  - CPU Interface
    65
  - Programmable Logic Device
    65
  - SDM PIN Drivers
    65
  - Step Attenuator/Relay Drivers
    65
  - Switched Filter PIN Drivers
    65
  - ALC Modulator Driver
    67
  - A10 Alc Pcb
    69
  - ALC Slope
    69
  - CPU Interface
    69
  - Level Reference Voltage
    69
  - Amplitude Modulation
    71
  - External ALC
    71
  - Internal ALC
    71
  - ALC Loop Error Signal
    72
  - Detector Log Amplifier
    72
  - Sample/Hold Circuit
    72
  - ALC Gain Cal DAC
    73
  - Level Amplifier
    73
  - Not Leveled Detector
    73
  - AM Meter Circuit
    74
  - Detector Thermistor Circuit
    74
  - DVM Multiplexer
    74
  - A11 Am/Fm Pcb
    75
  - CPU Interface
    75
  - FM Input Circuitry
    75
  - FM Calibration DAC
    77
  - FM Meter Circuit
    77
  - FM Sweep
    77
  - Phase-Locked FM
    77
  - FM Coil Sensitivity Circuit
    78
  - Limiter
    78
  - YIG Phase-Lock
    78
  - AM Input Circuitry
    79
  - DVM Multiplexer
    79
  - A12 Analog Instruction Pcb
    80
  - CPU Interface
    80
  - Frequency Band Selection
    80
  - Reference Supplies
    80
  - Ramp Generator Circuitry
    81
  - Frequency Instruction Circuitry
    84
  - Horizontal Output
    86
  - V/Ghz Circuitry
    86
  - YIG Offset DAC
    86
  - DVM Multiplexer
    87
  - Slope Circuitry
    87
  - A13 Yig Driver Pcb
    88
  - FM Tuning Coil Driver
    88
  - Main Tuning Coil Driver
    88
  - Bias Supplies
    91
  - A14 Doubler Driver Pcb
    92
  - Bias Supplies
    92
  - Modulator Drivers
    93
  - Modulator Shaper
    93
  - A14-1 Sdm Driver Pcb
    96
  - Bias Supply
    96
  - A16 Cpu Interface Pcb
    97
  - CPU Interface
    97
  - Dedicated Serial I/O
    97
  - Rear Panel Signals
    97
  - Knob Decoder
    99
  - DVM
    100
  - Interrupt Control Circuits
    100
  - Status Latch
    100
  - A17 Cpu Pcb
    101
  - Address Bus
    101
  - CPU Memory
    101
  - Data Bus
    101
  - Microprocessor Circuits
    101
  - GPIB Interface
    103
  - Parallel Interface/Timer
    103
  - Serial Interface
    103
  - Interrupt Control
    104
  - A15, A18, & A19 POWER SUPPLY Pcbs
    105
  - A19 AC Line Conditioner PCB
    105
  - Line Rectifier/Doubler Circuit
    105
  - Line Voltage Selector Module
    105
  - A18 Power Supply PCB
    107
  - A15 Regulator PCB
    109
  - Common RF Components
    112
  - Rf Deck Assemblies
    112
  - RF Deck Configurations
    112
  - Below 320001
    115
  - And above
    120
Table of Contents

124
- Chapter 3 Performance Verification
  
  126
  - RF Decks for Models with Serial Number 32001
    120
  - Introduction
    126
  - Test Records
    126
  - Test Procedure
    129
  - Test Setup
    129
  - Example
    130
  - Frequency Synthesis Tests
    131
    
    Frequency Counter
    131
  - Test Setup
    131
  - Coarse Loop/Yig Loop Test Procedure
    132
  - Fine Loop Test Procedure
    133
  - SPURIOUS SIGNALS TEST: RF OUTPUT SIGNALS ≤2 Ghz
    134
  - Test Procedure
    134
  - Test Setup
    134
  - HARMONIC TEST: RF OUTPUT SIGNALS from 2 to 20 Ghz
    137
  - Test Setup
    137
  - Test Procedure (2 to 10 Ghz)
    138
  - Test Procedure (11 to 20 Ghz)
    139
  - Single Sideband Phase Noise Test
    141
  - Test Setup
    141
  - Test Procedure
    142
    
    Power Meter
    145
Chapter 4 Calibration

149
- Introduction
  151
- Recommended Test Equipment
  153
- Calibration Following Subassembly Replacement
  154
- Initial Setup
  155
- Interconnection
  155
- Configuring the PC
  156
- Equipment Setup
  159
- Preliminary Calibration
  159
- Calibration Steps
  160
- Resetting the Linearizer Dacs
  160
- Shaper DAC Adjustment
  166
- Switched Filter Shaper Calibration
  166
- Entering DAC Settings
  169
- Storing DAC Settings
  169
- Alc Slope Calibration
  171
- ALC Slope DAC Adjustment
  171
- Rf Level Calibration
  174
- Am Bandwidth Calibration
  175
- Equipment Setup
  175
- AM Bandwidth Adjustment
  176
- Entering DAC Settings
  177
- Storing DAC Settings
  178
- Am Calibration
  179
- Equipment Setup
  179
- AM Calibration DAC Adjustment
  180
- Equipment Setup
  182
Table of Contents

185
- Chapter 5 Troubleshooting
  
  187
  - Fm Calibration
    182
  - Error and Warning/Status Messages
    187
  - Introduction
    187
  - Recommended Test Equipment
    187
  - Self-Test Error Messages
    188
  - Messages
    191
  - Normal Operation Error and Warning/Status
    191
  - Malfunctions Not Displaying an Error Message
    193
  - Troubleshooting Tables
    193
    
    Test Point Locations
    194
    
    Troubleshooting Tables
    195
    
    Power Supply Tests
    198
    
    Down Converter
    213
Table of Contents

233
- Chapter 6 Removal and Replacement Procedures
  
  235
  - Introduction
    235
    
    Replacement Procedures
    236
  - Preliminary
    236
  - Procedure
    236
  - Removing and Replacing the Chassis Covers
    236
  - Preliminary
    238
  - Procedure
    238
  - Removing and Replacing the Front Panel Assembly
    238
  - Preliminary
    240
  - Procedure
    240
  - Removing and Replacing the A3, A4, A5, or A6 Pcb
    240
  - Preliminary
    242
  - Procedure
    242
  - Removing and Replacing the A7 Pcb
    242
  - Removing and Replacing the A9, A10, A11, or A12 Pcb
    242
  - Preliminary
    243
  - Procedure
    243
  - Removing and Replacing the A13, A14, or A15 Pcb
    243
  - Removing and Replacing the A16 or A17 Pcb
    243
  - Preliminary
    244
  - Procedure
    244
  - Removing and Replacing the A18 or A19 Pcb
    244
  - Preliminary
    245
  - Procedure
    245
  - Removing and Replacing the A21-1 Pcb
    245
  - Preliminary
    246
  - Procedure
    246
  - Removing and Replacing the Rear Panel Assembly
    246
  - Preliminary
    249
  - Procedure
    249
  - Removing and Replacing the A21 Pcb
    249
  - Preliminary
    250
  - Procedure
    250
- Appendix A Test Records
  
  251
  - Removing and Replacing the Fan Assembly
    250

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