vi Table of Contents
May 25, 2005 6881096C74-B
Chapter 1 Introduction..........................................................................1-1
1.1 Notations Used in This Manual ......................................................................................................1-1
1.2 General...........................................................................................................................................1-1
Chapter 2 Product Overview ................................................................2-1
2.1 Introduction.....................................................................................................................................2-1
2.2 Functional Blocks ...........................................................................................................................2-1
2.3 Control-Head Assembly .................................................................................................................2-2
2.3.1 Display, Vacuum Fluorescent Display Driver, Vacuum Fluorescent Voltage Source,
Controls and Indicators, Status LEDs and Backlight LEDs ...............................................2-2
2.3.2 Vehicle Interface Ports ......................................................................................................2-2
2.3.2.1 Dash-Mount Control-Head Configuration (Mid Power Only) ....................................2-2
2.3.2.5 VIP Output Connections:..........................................................................................2-6
2.3.2.6 VIP Input Connections:.............................................................................................2-6
2.3.2.7 DEK Interface With Radio: Remote-Mount (W4, W5, W7, W9)................................2-7
2.3.3 Power Supplies .................................................................................................................2-7
2.3.4 Ignition Sense Circuits.......................................................................................................2-7
2.4 Receiver Section ............................................................................................................................2-8
2.4.1 VHF Band Radios..............................................................................................................2-8
2.4.1.1 Front-End Section ....................................................................................................2-8
2.4.1.2 Back-End Section.....................................................................................................2-8
2.4.2 UHF Range 1/UHF Range 2 Band Radios........................................................................2-8
2.4.2.1 Front-End Section ....................................................................................................2-8
2.4.2.2 Intermediate Frequency and Back-End....................................................................2-8
2.4.3 700–800 MHz Band Radios ..............................................................................................2-9
2.4.3.1 Front-End Section ....................................................................................................2-9
2.4.3.2 Back-End Section.....................................................................................................2-9
2.5 Transmitter Section ........................................................................................................................2-9
2.5.1 VHF Radios .......................................................................................................................2-9
2.5.2 UHF Range 1/UHF Range 2 Radios .................................................................................2-9
2.5.3 700–800 MHz Radios......................................................................................................2-10
2.5.3.1 RFPA......................................................................................................................2-10
2.5.3.2 Output Network ......................................................................................................2-10
2.5.3.3 Power Control.........................................................................................................2-10
2.5.3.4 Circuit Protection ....................................................................................................2-10
2.6 Frequency Generation Unit ..........................................................................................................2-10
2.6.1 VHF MHz Radios.............................................................................................................2-10
2.6.2 UHF Range 1/UHF Range 2 Radios ...............................................................................2-11
2.6.3 700–800 MHz Radios......................................................................................................2-11
2.7 Controller Section.........................................................................................................................2-12
2.7.1 Analog Mode of Operation ..............................................................................................2-12
2.7.2 Digital (ASTRO) Mode of Operation................................................................................2-13
2.7.3 Controller Section Circuitry..............................................................................................2-13
Chapter 3 Theory of Operation ............................................................3-1
3.1 Main Board .....................................................................................................................................3-1
3.2 Main Board Major Sections ............................................................................................................3-1
3.2.1 VHF (136–174 MHz) Band ................................................................................................3-1
3.2.2 UHF Range 1 (380-470 MHz) and UHF Range 2 (450-520 MHz) Band ...........................3-6
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