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67 B Series
Wiltron 67 B Series Maintenance Manual
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2
Table of Contents
Section I General Information
6
Table of Contents
6
Identification Number
8
Related Manuals
8
Scope of the Manual
8
Description
8
Introduction
8
Options
9
Recommended Test Equipment
13
Section 2
14
2H- 1 Introduction
19
Analog Instruction (al 7 PCB)
24
Circuit Subsystems
24
Frequency Synthesis Subsystem-RF Casting
24
Front Panel Assembly (al and A2 Pcbs)
24
Inputs/Outputs CA27 PCB and P/O A2 9 PCB)
24
Pcbs)
24
2-3.9 RF Microwave Deck
25
Motherboard/Interconnections
25
Pcb)
25
Frequency Sy Nthesis Circuits, Functional Description 2-1
26
FM Modulation
27
RF Outputs 0.0 1 to 60 Ghz
27
Sweep Mode of Operation
27
Alc and Modulation Circuits, Functional Description
28
ALC Loop Operation
28
2-5.2 A13 Pulse Generator PCB Operation
29
2-6.3 Error Codes
36
Hidden-Key Routines
36
System Troubleshooting
36
Troubleshooting Faults that Do Not Produce Error Codes
36
Power Supply
55
Power Supply Assemblies, Overall Description
55
3.1 AC Line and +24V Standby Power Supply Circuits
56
Detailed Circuit Description
56
Power Supply Assemblies, Detailed Description
56
3.3 A25 Switching Power Supply PCB, Detailed Circuit Description
59
3.4 A22 Regulator Interface PCB, Detailed Circuit Description
61
Power Supply (A2 2, A2 5 , A26 Pcbs and P/O A2 8 PCB)
62
Power Supply Assemblies, Service Sheets
62
Power Supply Assemblies, Troubleshooting
62
Digital Control Assemblies, Overall Description
84
6. 3 Shift Registers
93
As Serial 1/0 Pcb, Detailed Circuit Description
93
Multiplexers
93
6. 6 Serial Data Input
94
Ground Return Multiplexer
94
Digital Control Assemblies, Troubleshooting
95
S Digital Control Assemblies, Service Sheets
95
Front Panel Assemblies, Overall Description
112
FRONT PANEL ASSEMBLIES: al and A2 Pcbs
112
. 2 A2 Front Panel Control PCB, General Description
113
3.L Line Switch and Power on Circuits
113
Front Panel Keys
113
. 2 Internal Parallel Data Bus
115
. 5 Knob Amplifier
115
A2 Front Panel Control Pcb, Detailed Circuit Description
115
Display Message Data Latches
115
Keyboard Encoder, Interrupt and Output Circuits
115
Inputs/Outputs Assemblies , Overall Description
137
. L Digital Control Circuits
138
A27 Auxillary Vo Pcb , Detailed Circuit Descripi'ion
138
A29 Rear Panel Interface Pcb, Detailed Circuit Description
138
Microprocessor Interface Circuits
138
External Instrument Interface Circuits
139
ALC Loop VO Interface Circuits
140
Inputs/Outputs Assemblies , Service Sheets 2
140
Inputs/Outputs Assemblies, Troubleshooting
140
Lov Horiz Output Signal Circuits
140
PIN Switch Drivers
140
Step Attenuator and Relay Drivers
140
Reference Loop
159
Reference Loop Assemblies, Overall Description
159
REFERENCE LOOP ASSEMBLIES: A5 , A7 , Alo Pcbs and CRY STAL OSCILLATOR
159
A5 Reference Oscillator , Detailed Circuit Description
160
A7 Reference Divider, Detailed Circuit Description
160
Buffer Amplifiers
160
Loop Amplifier
160
Reference Loop Oscillator
160
. L 500 Mhz Input
161
Divide -By -Five
161
External 10 Mhz Input Circuit
161
Internal 10 Mhz Input Circuit
161
Phase/Frequency Detector
161
Alo REFERENCE BUFFER, DETAILED CIRCUIT DESCRIPTION
162
Buffer Amplifiers
162
Input
162
Reference Loop Assemblies, Service Sheets
162
Reference Loop Assemblies, Troubleshooting
162
2F-Coarse Loop
177
Coarse Loop Assemblies, Overall Description
177
COARSE LOOP ASSEMBLIES: A3 , A4 , and A6 Pcbs
177
. 1 Input Amplifier
178
. 1 Local Oscillator (LO) Input
178
. 2 Loop Amplifier
178
2F-3.2
178
4 0-4 90 Mhz RF Input
178
A3 Coarse Loop M Ixer, Detailed Circuit Description
178
Buffer Amplifiers
181
.3 Coarse Loop Counter Chain Operation
182
10 Mhz Reference Input
183
Coarse Loop Assemblies, Service Sheets
184
Coarse Loop Assemblies, Troubleshooting
184
Notch Filters
184
Fine Loop Assemblies, Overall Description
201
FINE LOOP ASSEMBLIES: A9 and All Pcbs
201
2G-3.1 Loop Amplifier
202
2G-3.2 Linearizer
202
2G-3.3 Voltage-Controlled Oscillator
202
2G-3.4 Output Amplifiers
202
A9 Fine Loop Oscillator, Detailed Circuit Description
202
. 1 10 Mhz Input Circuit
203
. 2 200-3 21 Mhz Fine Loop Input
203
All FINE LOOP DIVIDER, DETAILED CIRCUIT DESCRIPTION
203
Counter Circuits
203
Phase/Frequency Detector
203
Serial Input Circuits
203
. 6 Notch Filters
204
Fine Loop Assemblies, Service Sheets
204
Fine Loop Assemblies, Troubleshooting
204
Analog Instruction Assembly, Overall Description
251
Analog Instruction Assembly: A17 Pcb
251
21-3.1 Microprocessor Bus Interface and Internal Data Bus
252
21-3.2 Ramp Generator
253
Frequency Instruction
256
Power Meter
258
Analog Instruction Assembly, Service Sheets
260
Analog Instruction Assembly, Troubleshooting
260
2.2 FM Coil Driver Circuits
273
2J-2.1 A18-A21 YIG Driver PCB Addressing
273
Introduction
273
.4 Bias Supply Driver Circuits
274
2.3 Main Tuning Coil Driver Circuits
274
YIG DRIVER Pcbs SERVICE SHEETS
275
YIG DRIVER Pcbs TROUBLESHOOTING
275
2K-Alc/Pulse Modulation
286
Overview of ALC Loop Operation
286
A 15 ALC PCB Functional Description 2
290
Detector Preamplifiers 2
290
External ALC Level Circuits 2
290
ALC Comparator and Sample/Hold Circuits 2
293
Detector Shaper Circuit
293
External ALC Gain Cal
293
. 1 2 Detector Thermistor Circuits
294
. Ll Unleveled Logic Circuits
294
A 13 Pulse Generator Pcb Circuit Description
295
Pulse Generator Circuits
295
3.2 Source/Mode Select Control Circuits
296
3.4 A13 PCB Processor Interface Circuits
297
A29 Rear Panel Interface Pcb Circuits Description
297
ALC Control Signal Drive Circuits
297
Pulse Modulation PIN Drivers
297
V/GHZ DAC Circuits
297
5.1 Control Modulators
300
5.2 Switched Filter Module
300
Alc Loop Rf Microwave Dec K Components
300
Alc Pulse Modulation Subsystem Schematics
300
Directional Coupler
300
Main Mux Switch
300
Rf Microwave Deck Assembly, Overall Description
333
Down Converter
337
Frequency Band 5, Circuit Description
337
Frequency Doubler/Amplifier/Modulator
337
RF Output
337
Switched Filter
337
Frequency Band 6, Circuit Description
338
RF Output
338
Rf Microwave Deck Assembly, Service Sheets
339
Rf Microwave Deck Assembly, Troubleshooting
339
. 1 Motherboard/Interconnect Circuits Description
347
Introduction
347
RF Casting Coaxial Cables
348
RF Microwave Deck Interconnections
348
Wiring Harnesses/Ribbon Cables
348
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Wiltron 67 B Series Specifications
General
Brand
Wiltron
Model
67 B Series
Category
Test Equipment
Language
English
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