Table of Contents
Foreword
Document Copyrights ................................................................................................................ inside cover
Disclaimer.................................................................................................................................. inside cover
List of Figures ........................................................................................................................................... viii
List of Tables ..............................................................................................................................................xi
Related Publications...................................................................................................................................xi
1.1
Test Equipment.............................................................................................................................. 1-1
1.2
Service Aids................................................................................................................................... 1-2
2.1
3.1
Controller ....................................................................................................................................... 3-1
3.1.1
Microprocessor Circuitry ................................................................................................... 3-1
3.1.1.1
3.1.1.2
3.1.1.3
3.1.1.4
3.1.1.5
3.1.1.6
3.1.1.7
3.1.1.8
3.1.1.9
3.1.1.10 Battery Gauge.......................................................................................................... 3-4
3.1.2
Audio Circuitry .................................................................................................................. 3-4
3.1.2.1
3.1.2.2
3.1.2.3
3.1.2.4
3.1.2.5
3.1.2.6
3.1.2.7
4.1
Introduction .................................................................................................................................... 4-1
4.2
VHF Receiver ................................................................................................................................ 4-1
Memory Usage ........................................................................................................ 3-2
Boot Mode Control................................................................................................... 3-4
Audio Power Amplifier ............................................................................................. 3-5
PTT Circuits ............................................................................................................. 3-6
VOX Operation ........................................................................................................ 3-6
i