Document Outline

• Title Page
• Declaration of Conformity
• Table Of Contents
  • Chapter 1 - General Information
    • 1-1 SCOPE OF MANUAL 1-3
    • 1-2 INTRODUCTION 1-3
    • 1-3 DESCRIPTION 1-3
    • 1-4 IDENTIFICATION NUMBER 1-5
    • 1-5 ELECTRONIC MANUAL 1-6
    • 1-6 RELATED MANUALS 1-6
      • Operation Manual 1-6
      • GPIB Programming Manual 1-6
      • SCPI Programming Manual 1-6
    • 1-7 OPTIONS 1-7
    • 1-8 LEVEL OF MAINTENANCE 1-8
      • Troubleshooting 1-8
      • Repair 1-8
      • Calibration 1-8
      • Preventive Maintenance 1-8
    • 1-9 PREVENTIVE MAINTENANCE 1-9
    • 1-10 STATIC-SENSITIVE COMPONENT HANDLING PRECAUTIONS 1-9
    • 1-11 STARTUP CONFIGURATIONS 1-11
    • 1-12 RECOMMENDED TEST EQUIPMENT 1-12
    • 1-13 EXCHANGE ASSEMBLY PROGRAM 1-14
    • 1-14 REPLACEABLE SUBASSEMBLIES AND PARTS 1-14
    • Table 1-1 ANRITSU Service Centers 1-18
  • Chapter 2 - Functional Description
    • 2-1 INTRODUCTION 2-3
    • 2-2 682XXB/683XXB MAJOR SUBSYSTEMS 2-3
      • Digital Control 2-3
      • Front Panel 2-4
      • Frequency Synthesis 2-4
      • Analog Instruction 2-5
      • YIG Driver 2-5
      • Function Generator 2-5
      • Fig 2-1 System Block Diagram 2-6, 2-7
      • ALC/AM/Pulse Modulation 2-8
      • RF Deck 2-8
      • Power Supply 2-8
      • Inputs/Outputs 2-8
      • Motherboard/Interconnections 2-9
    • 2-3 FREQUENCY SYNTHESIS 2-9
      • Phase-Lock Loops 2-9
      • Overall Operation 2-10
      • Fig 2-2 Block Diagram 2-11
      • RF Outputs 0.01 to 65 GHz 2-13
      • Frequency Modulation 2-14
      • Phase Modulation (Option 6) 2-14
      • Analog Sweep Mode (683XXB only) 2-14
      • Step Sweep Mode 2-15
    • 2-4 ALC/AM/PULSE MODULATION 2-15
      • ALC Loop Operation 2-15
      • Fig 2-3 Block Diagram 2-17
      • Pulse Generator Operation 2-18
    • 2-5 RF DECK ASSEMBLIES 2-19
      • RF Deck Configurations 2-20
      • YIG-tuned Oscillator 2-20
      • Block Diagrams 2-21, 2-22, 2-27, 2-28
      • Power Level Control and Modulation 2-23
      • RF Signal Filtering 2-23
      • 0.01 to 2 GHz Down Converter 2-24
      • 0.5 to 2.2 GHz Digital Down Converter 2-25
      • Switched Doubler Module 2-26
      • Source Quadrupler Module 2-29
      • Power Level Detection/ALC Loop 2-30
      • Step Attenuator 2-31
  • Chapter 3 - Performance Verification
    • 3-1 INTRODUCTION 3-3
    • 3-2 RECOMMENDED TEST EQUIPMENT 3-3
    • 3-3 TEST RECORDS 3-3
    • 3-4 CONNECTOR AND KEY LABEL NOTATION 3-3
    • 3-5 682XXB/683XXB POWER LEVELS 3-6
    • 3-6 INTERNAL TIME BASE AGING RATE TEST 3-8
      • Test Setup 3-8
      • Test Procedure 3-9
    • 3-7 FREQUENCY SYNTHESIS TESTS 3-11
      • Test Setup 3-11
      • Coarse Loop/YIG Loop Test Procedure 3-12
      • Fine Loop Test Procedure 3-13
    • 3-8 SPURIOUS SIGNALS TEST: RF OUTPUT SIGNALS <2 GHz (<2.2 GHz for 68XX5B MODELS) 3-14
      • Test Setup 3-14
      • 0.01 - 2 GHz Test Procedure 3-14
      • 0.5 - 2.2 GHz Test Procedure 3-17
    • 3-9 HARMONIC TEST: RF OUTPUT SIGNALS FROM 2 TO 20 GHz 3-18
      • Test Setup 3-18
      • Test Procedure (2 to 10 GHz) 3-19
      • Test Procedure (11 to 20 GHz) 3-20
    • 3-10 SINGLE SIDEBAND PHASE NOISE TEST 3-22
      • Test Setup 3-22
      • Test Procedure 3-23
    • 3-11 POWER LEVEL ACCURACY AND FLATNESS TESTS 3-26
      • Test Setup 3-26
      • Power Level Accuracy Test Procedure 3-27
      • Power Level Flatness Test Procedure 3-27
    • 3-12 AMPLITUDE MODULATION TEST 3-30
      • Test Setup 3-30
      • AM Input Sensitivity Procedure 3-31
    • 3-13 FREQUENCY MODULATION TESTS 3-33
      • Test Setup 3-33
      • FM Input Sensitivity Procedure 3-33
    • 3-14 PULSE MODULATION TESTS: RISE TIME, FALL TIME, OVERSHOOT, AND LEVEL 3-39
      • Test Setup 3-39
      • Rise/Fall Time and Overshoot 3-40
      • Pulse Leveling Accuracy 3-41
    • 3-15 PULSE MODULATION TEST: VIDEO FEEDTHROUGH 3-43
      • Test Setup 3-43
      • Test Procedure 3-44
    • 3-16 PULSE MODULATION TEST: RF ON/OFF RATIO 3-45
      • Test Setup 3-45
      • Test Procedure 3-45
    • 3-17 PHASE MODULATION TESTS 3-48
      • Test Setup 3-48
      • Phase Modulation Input Sensitivity Procedure 3-48
  • Chapter 4 - Calibration
    • 4-1 INTRODUCTION 4-3
    • 4-2 RECOMMENDED TEST EQUIPMENT 4-3
    • 4-3 TEST RECORDS 4-3
    • 4-4 CALIBRATION FOLLOWING SUBASSEMBLY REPLACEMENT 4-4
    • 4-5 CONNECTOR AND KEY LABEL NOTATION 4-4
    • 4-6 INITIAL SETUP 4-7
      • Interconnection 4-7
      • PC Setup - Windows 3.1 4-8
      • PC Setup - Windows 95 4-10
    • 4-7 PRELIMINARY CALIBRATION 4-13
      • Equipment Setup 4-13
      • Calibration Steps 4-14
    • 4-8 SWITCHED FILTER SHAPER CALIBRATION 4-17
      • Equipment Setup 4-17
      • Log Amplifier Zero Calibration 4-18
      • Limiter DAC Adjustment 4-18
      • Shaper DAC Adjustment 4-19
    • 4-9 RF LEVEL CALIBRATION 4-22
    • 4-10 ALC SLOPE CALIBRATION 4-23
      • Equipment Setup 4-23
      • ALC Slope DAC Adjustment 4-24
    • 4-11 ALC BANDWIDTH CALIBRATION 4-31
      • Equipment Setup 4-31
      • Bandwidth Calibration 4-31
    • 4-12 AM CALIBRATION 4-33
      • Equipment Setup 4-33
      • AM Calibration Procedure 4-34
    • 4-13 FM CALIBRATION 4-37
      • Equipment Setup 4-37
      • FM Calibration Procedure 4-38
    • 4-14 PHASE MODULATION CALIBRATION 4-51
      • Equipment Setup 4-51
      • Phase Modulation Calibration Procedure 4-52
  • Chapter 5 - Troubleshooting
    • 5-1 INTRODUCTION 5-3
    • 5-2 RECOMMENDED TEST EQUIPMENT 5-3
    • 5-3 ERROR AND WARNING/STATUS MESSAGES 5-3
      • Self-Test Error Messages 5-3
      • Normal Operation Error and Warning/Status Messages 5-7
    • 5-4 MALFUNCTIONS NOT DISPLAYING AN ERROR MESSAGE 5-10
    • 5-5 TROUBLESHOOTING TABLES 5-10
  • Chapter 6 - Removal and Replacement Procedures
    • 6-1 INTRODUCTION 6-3
    • 6-2 REMOVING AND REPLACING THE CHASSIS COVERS 6-4
      • Preliminary 6-4
      • Procedure 6-4
    • 6-3 REMOVING AND REPLACING THE FRONT PANEL ASSEMBLY 6-6
      • Preliminary 6-6
      • Procedure 6-6
    • 6-4 REMOVING AND REPLACING THE A3, A4, A5, OR A6 PCB 6-8
      • Preliminary 6-8
      • Procedure 6-8
    • 6-5 REMOVING AND REPLACING THE A7 PCB 6-10
      • Preliminary 6-10
      • Procedure 6-10
    • 6-6 REMOVING AND REPLACING THE A8, A9, A10, A11, OR A12 PCB 6-10
      • Preliminary 6-10
      • Procedure 6-10
    • 6-7 REMOVING AND REPLACING THE A13, A14, OR A15 PCB 6-11
      • Preliminary 6-11
      • Procedure 6-11
    • 6-8 REMOVING AND REPLACING THE A16 OR A17 PCB 6-11
      • Preliminary 6-11
      • Procedure 6-11
    • 6-9 REMOVING AND REPLACING THE A18 OR A19 PCB 6-12
      • Preliminary 6-12
      • Procedure 6-12
    • 6-10 REMOVING AND REPLACING THE REAR PANEL ASSEMBLY 6-13
      • Preliminary 6-13
      • Procedure 6-13
    • 6-11 REMOVING AND REPLACING THE A21 PCB 6-16
      • Preliminary 6-16
      • Procedure 6-16
    • 6-12 REMOVING AND REPLACING THE A21-1 PCB 6-17
      • Preliminary 6-17
      • Procedure 6-17
    • 6-13 REMOVING AND REPLACING THE FAN ASSEMBLY 6-18
      • Preliminary 6-18
      • Procedure 6-18
  • Appendix A - Test Records
    • A-1 INTRODUCTION A-1
    • Performance Verification Test Records
      • 68237B/68337B A-3
      • 68245B/68345B A-19
      • 68247B/68347B A-37
      • 68253B/68253B A-55
      • 68255B/68355B A-73
      • 68259B/68359B A-93
      • 68263B/68363B A-113
      • 68265B/68365B A-131
      • 68269B/68369B A-151
      • 68275B/68375B A-171
      • 68277B/68377B A-189
      • 68285B/68385B A-207
      • 68287B/68387B A-225
      • 68295B/68395B A-243
      • 68297B/68397B A-259
    • Calibration Test Records
      • 68237B/68337B A-15
      • 68245B/68345B A-33
      • 68247B/68347B A-51
      • 68253B/68353B A-69
      • 68255B/68355B A-89
      • 68259B/68359B A-109
      • 68263B/68363B A-127
      • 68265B/68365B A-147
      • 68269B/68369B A-167
      • 68275B/68375B A-185
      • 68277B/68377B A-203
      • 68285B/68385B A-221
      • 68287B/68387B A-239
      • 68295B/68395B A-255
      • 68297B/68397B A-271
• Subject Index
  • 0 - 9
    • 682XXB/683XXB
      • Assembly and Component Locator Diagram, 6-9
      • General Description, 1-3
      • Major Subsystems Functional Description, 2-3
      • Manuals, Related, 1-6
      • Models, List of, 1-4 - 1-5
      • Options, List of, 1-7
      • Startup Configurations, 1-11
      • System Block Diagram, 2-6 - 2-7
  • A
    • ALC/AM/Pulse Modulation Subsystem
      • Block Diagram, 2-17
      • Functional Description, 2-15
    • ANRITSU Service Centers, 1-18
  • C
    • Calibration
      • ALC Bandwidth Calibration, 4-31
      • ALC Slope Calibration, 4-23
      • AM Calibration, 4-33
      • FM Calibration, 4-37
      • Following Subassembly Replacement, 4-4
      • Initial Setup, 4-7
      • Phase Modulation Calibration, 4-51
      • Preliminary Calibration, 4-13
      • RF Level Calibration, 4-22
      • Switched Filter Shaper Calibration, 4-17
      • Test Equipment, 4-3
      • Test Record, 68237B/68337B, A-15 - A-18
      • Test Record, 68245B/68345B, A-33 - A-36
      • Test Record, 68247B/68347B, A-51 - A-54
      • Test Record, 68253B/68353B, A-69 - A-72
      • Test Record, 68255B/68355B, A-89 - A-92
      • Test Record, 68259B/68359B, A-109 - A-112
      • Test Record, 68263B/68363B, A-127 - A-130
      • Test Record, 68265B/68365B, A-147 - A-150
      • Test Record, 68269B/68369B, A-167 - A-170
      • Test Record, 68275B/68375B, A-185 - A-188
      • Test Record, 68277B/68377B, A-203 - A-206
      • Test Record, 68285B/68385B, A-221 - A-224
      • Test Record, 68287B/68387B, A-239 - A-242
      • Test Record, 68295B/68395B, A-255 - A-258
      • Test Record, 68297B/68397B, A-271 - A-274
    • Chassis Covers
      • Remove/Replace Procedures, 6-4
  • E
    • Electrostatic Discharge Precautions, 1-9
    • Error Messages
      • Operation Related, 5-7
      • Self-Test, 5-3 - 5-6
    • Exchange Assembly Program
      • Program Description, 1-14
  • F
    • Fan Assembly
      • Remove/Replace Procedures, 6-18
    • Frequency Synthesis Subsystem
      • Block Diagram, 2-11
      • Functional Description, 2-9
    • Front Panel Assembly
      • Remove/Replace Procedures, 6-6
    • Functional Description
      • 682XXB/683XXB Major Subsystems, 2-3
      • ALC/AM/Pulse Modulation Subsystem, 2-15
      • Frequency Synthesis Subsystem, 2-9
      • RF Deck Assemblies, 2-19
      • System Block Diagram, 2-6 - 2-7
  • G
    • General Description, 1-3
  • I
    • Identification Number, 1-5
  • M
    • Maintenance, Level of , 1-8
    • Manual, Electronic, 1-6
    • Manual, GPIB Programming, 1-6
    • Manual, Operation, 1-6
    • Manual, SCPI Programming, 1-6
    • Models, List of, 1-4 - 1-5
  • N
    • Normal Operation Error/Warning Messages, 5-7
  • O
    • Options, List of, 1-7
  • P
    • Parts and Subassemblies, Replaceable, 1-14
    • Parts Ordering Information, 1-14
      • ANRITSU Service Centers, 1-18
    • Performance Verification Tests, 3-3
    • Preventive Maintenance
      • Fan Filter Cleaning, 1-9
  • R
    • Rear Panel Assembly
      • Remove/Replace Procedures, 6-13
    • Recommended Test Equipment, 1-12
    • Removal and Replacement Procedures
      • A13, A14, or A15 PCB, 6-11
      • A16 or A17 PCB, 6-11
      • A18 or A19 PCB, 6-12
      • A21 Line Filter/Rectifier PCB, 6-16
      • A21-1 BNC/AUX I/O Connector PCB, 6-17
      • A3, A4, A5, or A6 PCBs, 6-8
      • A7 YIG Loop PCB, 6-10
      • A8, A9, A10, A11, or A12 PCB, 6-10
      • Assembly and Component Locator Diagram, 6-9
      • Chassis Covers, 6-4
      • Fan Assembly, 6-18
      • Front Panel Assembly, 6-6
      • Rear Panel Assembly, 6-13
    • Replaceable Subassemblies and Parts, 1-14
    • RF Deck Assemblies
      • Block Diagram, 2-21 - 2-22, 2-27 - 2-28
      • Functional Description, 2-19
  • S
    • Scope of Manual, 1-3
    • Self-Test Error Messages, 5-3
    • Startup Configurations, 1-11
    • Static-Sensitive Component Precautions, 1-9
  • T
    • Test Equipment, Recommended, 1-12
    • Testing, Performance Verification
      • Amplitude Modulation Test, 3-30
      • Frequency Modulation Tests, 3-33
      • Frequency Synthesis Tests, 3-11
      • Harmonic Test: RF Output 2 to 20 GHz, 3-18
      • Internal Time Base Aging Rate Test, 3-8
      • Maximum Leveled Power Listing, 3-6 - 3-7
      • Phase Modulation Tests, 3-48
      • Power Level Accuracy and Flatness Tests, 3-26
      • Pulse Modulation Test: Overshoot, 3-39
      • Pulse Modulation Test: Pulse Level Accuracy, 3-39
      • Pulse Modulation Test: RF On/RF Off Ratio, 3-45
      • Pulse Modulation Test: Rise/Fall Time, 3-39
      • Pulse Modulation Test: Video Feedthrough, 3-43
      • Single Sideband Phase Noise Test, 3-22
      • Spurious Signals Test: RF Output <2 GHz, 3-14
      • Test Equipment, 3-3
      • Test Record, 68237B/68337B, A-3 - A-14
      • Test Record, 68245B/68345B, A-19 - A-32
      • Test Record, 68247B/68347B, A-37 - A-50
      • Test Record, 68253B/68353B, A-55 - A-67
      • Test Record, 68255B/68355B, A-73 - A-87
      • Test Record, 68259B/68359B, A-93 - A-107
      • Test Record, 68263B/68363B, A-113 - A-125
      • Test Record, 68265B/68365B, A-131 - A-145
      • Test Record, 68269B/68369B, A-151 - A-165
      • Test Record, 68275B/68375B, A-171 - A-183
      • Test Record, 68277B/68377B, A-189 - A-201
      • Test Record, 68285B/68385B, A-207 - A-219
      • Test Record, 68287B/68387B, A-225 - A-237
      • Test Record, 68295B/68395B, A-243 - A-254
      • Test Record, 68297B/68397B, A-259 - A-270
    • Troubleshooting
      • Connector/Test Points Locator Diagram, 5-11
      • Malfunctions Not Displaying an Error Message, 5-10
      • Normal Operation Error/Warning Messages, 5-7
      • Self-Test Error Messages, 5-3
    • Troubleshooting Tables, 5-10, 5-12 - 5-53