To Next Page

To Previous Page

iii

Table of Contents

Chapter 1 MODEL CHART AND TECHNICAL SPECIFICATIONS

1.0 GP240/GP280/GP540/GP580 Model Chart.........................................................1-1

2.0 Technical Specifications ......................................................................................1-2

Chapter 2 THEORY OF OPERATION

1.0 Introduction ..........................................................................................................2-1

2.0 800 MHz Transmitter ...........................................................................................2-1

2.1 Power Amplifier ..............................................................................................2-1

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

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

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

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

3.0 800 MHz Receiver ...............................................................................................2-3

3.1 Receiver Front-End ........................................................................................2-3

3.2 Receiver Back-End.........................................................................................2-4

3.3 Automatic Gain Control (AGC) .......................................................................2-5

4.0 Frequency Generation Circuit ..............................................................................2-6

4.1 Synthesizer.....................................................................................................2-7

4.2 Voltage Controlled Oscillator (VCO)...............................................................2-8

4.3 Trunked Radio System...................................................................................2-9

Chapter 3 TROUBLESHOOTING CHARTS

1.0 Troubleshooting Flow Chart for Receiver (Sheet 1 of 2)......................................3-1

2.0 Troubleshooting Flow Chart for Receiver (Sheet 2 of 2)......................................3-2

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

4.0 Troubleshooting Flow Chart for Synthesizer........................................................3-4

5.0 Troubleshooting Flow Chart for VCO...................................................................3-5

6.0 Troubleshooting Flow Chart for PassPort Trunking .............................................3-6

Chapter 4 800 MHz PCB/SCHEMATICS/PARTS LISTS

1.0 Allocation of Schematics and Circuit Boards .......................................................4-1

1.1 Controller Circuits ...........................................................................................4-1

2.0 800MHz PCB 8480641Z03 / Schematics ............................................................4-3

3.0 800MHz PCB 8480641Z03 / Parts List .............................................................4-11

Motorola GP series Service Manual

Other manuals for Motorola GP series