Codan Radio Communications VT-4D150 User Manuals

Table of Contents

• General Information

  1
• Introduction

  1
• Performance Specifications

  2
• Theory of Operation

  5
• General

  5
• Jumper Functions and Standard Configuration

  7
• Test Points

  8
• Transmitter Programming

  10
• Transmitter Assembly and Adjustment

  13
• Repair Note

  13
• Recommended Test Equipment List

  14
• Transmitter Assembly and Adjustment

  14
• Frequency Change

  14
• Digital Signal Processor Board Alignment

  15
• Repeater System Configuration

  19
• Digital Repeater

  19
• Repeater System Troubleshooting

  20
• Illustrations and Schematics

  23
• P25 Digital Transmitter Front Panel

  24
• P25 Digital Transmitter Block Diagram

  25
• P25 Digital Transmitter Main Board Component Layout - Bottom

  26
• P25 Digital Transmitter Main Board Component Layout - Top

  27
• P25 Digital Transmitter Schematic Diagram

  28
• P25 Adapter Board Component Layout

  29
• P25 Adapter Board Schematic Diagram

  29
• Parts Lists

  31
• P25 Digital Transmitter Electrical Parts List

  31
• P25 Digital Transmitter Mechanical Parts List

  34
• P25 Adapter Board Parts List

  35
• Revision History

  37
• General Information

  5
• Introduction

  5
• Performance Specifications

  6
• Theory of Operation

  7
• Amplifier Operation

  7
• Power Requirements

  8
• VHF Transmitter Amplifier Current Consumption

  8
• RF Circuitry

  8
• VHF Transmitter Amplifier Lowpass Filter

  8
• Power Control Circuitry

  8
• Power Sensing Circuitry

  8
• Output Power Sense

  9
• VSWR Sense

  9
• VSWR Overload

  9
• VHF Transmitter Amplifier Alignment

  11
• Repair Note

  11
• Recommended Test Equipment List

  12
• General

  12
• Standard Factory Settings and Jumper Configuration

  13
• VHF Transmitter Amplifier Alignment

  13
• VHF Transmitter Amplifier Adjustment

  13
• General Set-Up

  14
• Output Power Alarm (Forward Power)

  14
• Output Power

  15
• Antenna VSWR Alarm (Reverse Power)

  15
• Antenna VSWR Overload

  16
• Procedure Verification

  16
• Illustrations and Schematics

  17
• VT-3/150 Tranmitter Amplifier Component Layout

  18
• VT-3/150 Tranmitter Amplifier Schematic Diagram

  19
• VT-3/150 Amplifier Low Pass Filter Component Layout

  20
• VT-3/150 Amplifier Low Pass Filter Schematic Diagram

  20
• Parts Lists

  21
• VHF Transmitter Amplifier Electrical Parts List

  21
• VHF Transmitter Amplifier Mechanical Parts List

  24
• Revision History

  25