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Table of Contents

Chapter 1 THEORY OF OPERATION

1.0 Introduction ..........................................................................................................1-1

2.0 800 MHz Transmitter ...........................................................................................1-1

2.1 Power Amplifier ..............................................................................................1-1

2.2 Antenna Switch...............................................................................................1-2

2.3 Harmonic Filter ...............................................................................................1-2

2.4 Antenna Matching Network ............................................................................1-2

2.5 Power Control Integrated Circuit (PCIC) ........................................................1-2

3.0 800 MHz Receiver ...............................................................................................1-3

3.1 Receiver Front-End ........................................................................................1-3

3.2 Receiver Back-End.........................................................................................1-4

3.3 Automatic Gain Control (AGC) .......................................................................1-5

4.0 Frequency Generation Circuit..............................................................................1-6

4.1 Synthesizer.....................................................................................................1-7

4.2 Voltage Controlled Oscillator (VCO)...............................................................1-8

4.3 Trunked Radio System...................................................................................1-9

Chapter 2 TROUBLESHOOTING CHARTS

1.0 Troubleshooting Flow Chart for Receiver (Sheet 1 of 2)......................................2-1

2.0 Troubleshooting Flow Chart for Receiver (Sheet 2 of 2)......................................2-2

3.0 Troubleshooting Flow Chart for Transmitter ........................................................2-3

4.0 Troubleshooting Flow Chart for Synthesizer........................................................2-4

5.0 Troubleshooting Flow Chart for VCO...................................................................2-5

6.0 Troubleshooting Flow Chart for PassPort Trunking.............................................2-6

Chapter 3 800 MHz PCB/SCHEMATICS/PARTS LISTS

1.0 Allocation of Schematics and Circuit Boards .......................................................3-1

1.1 Controller Circuits...........................................................................................3-1

2.0 800MHz PCB 8480641Z02/Z03/Z09/Z10 Schematics.........................................3-3

3.0 800MHz PCB Parts List .....................................................................................3-21

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