iii
Table of Contents
Chapter 1 THEORY OF OPERATION
1.0 Introduction ..........................................................................................................1-1
2.0 Transmitter...........................................................................................................1-1
2.1 General...........................................................................................................1-1
3.0 Receiver...............................................................................................................1-3
3.1 Receiver Front-End ........................................................................................1-4
3.2 Receiver Back-End.........................................................................................1-5
3.3 Automatic Gain Control Circuit .......................................................................1-6
4.0 Frequency Generation Circuitry...........................................................................1-7
4.1 Synthesizer.....................................................................................................1-7
4.2 Voltage Controlled Oscillator (VCO)...............................................................1-9
Chapter 2 TROUBLESHOOTING CHARTS
1.0 Introduction ..........................................................................................................2-1
Troubleshooting Chart for Receiver (Sheet 1 of 2) ..............................................2-2
Troubleshooting Chart for Receiver (Sheet 2 of 2) ..............................................2-3
Troubleshooting Chart for Transmitter.................................................................2-4
Troubleshooting Chart for Synthesizer ................................................................2-5
Troubleshooting Chart for VCO ..........................................................................2-6
Troubleshooting Chart for Controller....................................................................2-7
Chapter 3 UHF PCB/SCHEMATICS AND PARTS LISTS
1.0 Notes For All Schematics and Circuit Boards......................................................3-1
2.0 Allocation of Schematics and Circuit Boards .......................................................3-2
2.1 UHF1 (403-470MHz) ......................................................................................3-2
2.2 UHF Narrow Band (450-470 MHz) .................................................................3-4
3.0 UHF1 PCB, Schematic Diagrams and Radio Parts List (RF Board)....................3-5
3.1 8404077G01...................................................................................................3-5
3.2 8404077G05/G06/G07/G09 .........................................................................3-15
3.3 8415563H06.................................................................................................3-31
3.4 8471441L01..................................................................................................3-45
4.0 UHF Narrow Band PCB, Schematic Diagrams and Radio Parts List (RF Board)
4.0 8415563H06.................................................................................................3-61
To Next Page
Loading...
