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Motorola GM Series User Manual

Motorola GM Series
36 pages
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Professional Radio
GM Series
Radio Installation Manual
68P64112B30
Issue: July 2000

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Motorola GM Series Specifications

General IconGeneral
Channels16
WaterproofNo
Frequency RangeVHF: 136-174 MHz
SignalingDTMF, MDC1200
Dimensions56 x 175 x 218 mm

Summary

Computer Software Copyrights

Safety Information

Safe and Efficient Operation

Provides instructions for safe and efficient operation of Motorola Portable and Mobile Two-Way Radios.

Radio Frequency Energy Exposure

Details compliance with standards and guidelines regarding human exposure to RF electromagnetic energy.

Mobile Radio Operation and EME Exposure

Guidance on optimal radio performance and human exposure to RF energy during mobile operation.

Mobile Antenna Installation

Control Station Operation

Installation Warnings

Installation Precautions

Precautions to prevent interference with vehicle braking systems during radio installation.

Braking System Tests

Procedures to test for radio interference with the vehicle braking system.

Operational Warnings

Potentially Explosive Atmospheres

Warning to turn off radio in potentially explosive areas to prevent ignition.

Blasting Caps and Areas

Warning to turn off radio near blasting caps to avoid interference with operations.

Chapter 1: Installation

General Information

Provides an overview of installation methods and accessory connections for the radio.

Plan the Installation

Details how to select an optimal location for mounting the radio unit in a vehicle.

DC Power Cable Installation

Instructions for routing and connecting the DC power cable to the vehicle's electrical system.

Trunnion Installation

Steps for mounting the radio using the standard trunnion bracket.

Antenna Installation

Guidance on mounting the antenna, including EME exposure and site selection.

Installation Options

Details various methods for mounting the radio, including dashboard and external speaker installations.

Accessory Connections

Description of pin functions for the accessory connector and connection plans.

Chapter 2: Reducing Noise Interference

Introduction to Noise Interference

Explains how electrical noise affects mobile radio operation and the importance of noise suppression.

Noise Sources

Identifies the three major noise sources affecting mobile radio systems: radiated, conducted, and induced noise.

Radiated Noise

Describes radiated noise entering the radio through the antenna, often from ignition systems or motors.

Conducted Noise

Explains conducted noise entering through attachment points to the vehicle's electrical system.

Induced Noise

Details noise signals induced into radio cabling due to proximity with other vehicle wiring.

Operation of a Conventional Ignition System

Explains the basic operation of an automobile ignition system for understanding interference causes.

Ignition System Introduction

Overview of the ignition system's role in igniting gasoline vapor and air mixture.

Sources of Ignition Interference

Details how the secondary circuit of the ignition coil causes interference.

Detection of Noise Sources

Methodical procedures for identifying offending noise sources using equipment like pick-up loops.

Noise Detection Procedure

Steps to detect noise by moving a pick-up loop or using bypass capacitors for trial-and-error.

Identifying Specific Noise Sources

Discusses geographic location, accessory operation, and ignition systems as potential noise sources.

Noise Reduction Techniques

Overview of three basic methods for suppressing noise: resistance, filtering, and static control.

General Noise Suppression

Describes basic noise suppression methods and the value of vehicle service manuals.

Ignition System Interference

Addresses engine tune-up, noise reduction kits, and ignition coil interference.

Alternator/Generator Whine

Methods to suppress high-pitched whine from alternators or generators using capacitors.