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Motorola GR300 service manual Theory of Operation

Models: GR300

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Table Of Contents

ZR310 Community Repeater Panel

Section 4

Theory of Operation

Overview

Circuit Description

Microprocessor

Serial Communications

TPL/DPL Decoding

DTMF Decoding

TPL Encoding

DPL Encoding

Beep Tone Encoding

Squelch/Repeat Audio

CSQ Input

Section 5

Maintenance

Overview

Preventive Maintenance

Visual Inspection

Cleaning

Diagnostic Commands

Disassembly

Removal

Top Cover Removal

Troubleshooting

Section 6

Programming

Overview

Programming Via Radio Service Software (RSS)

Getting Started

Programming the Repeater

Reading the Transmitter Radio

Reading the Receiver Radio

Configuring the System

System Programmable Fields

Program Mode Access Code

Morse ID interval, Speed and frequency

Courtesy Tone Frequency

System ID User Number

Carrier Only Repeat (Open Repeater)

Accessory PTT TPL/DPL encode

Anti-Kerchunker Timer

Timeout timer

March, 1993

6880902Z68-O

Table Of Contents

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Motorola GR300 service manual Theory of Operation

Contents

Radius GR300 Table Of Contents ZR310 Community Repeater Panel Theory of Operation Table Of Contents ZR310 Community Repeater Panel Appendix a Dtmf Commands Overview Standard FeaturesSystem Configuration Section IntroductionPhysical Description User FunctionsSection Introduction Assembly Section InstallationEquipment Required For Installation Installation ProceduresZR310, Rear View Fan Installation Section Installation Section 6880902Z68-O March Part Number Description Qty GR300 Housing Kit HLN8391March 6880902Z68-O Section Section Operation Reserved Users When a User Unkeys RadioRegenerated TPL/DPL/CSQ Carrier RepeatAccessory PTT Encode Reserve ModeBarge In Privacy Mode Stuck Mic Timeout TimerRepeater Set-up/Knockdown Section Theory of Operation Squelch/Repeater Audio TPL EncodingDPL Encoding Beep Tone EncodingSection Maintenance Top Cover Removal TroubleshootingProgramming Via Radio Service Software RSS Section ProgrammingGetting Started Programming the Repeater Get/Save, Repeater ModeReading the Transmitter Radio Read Receiver Screen March 6880902Z68-O Section Reading the ReceiverConfiguring the System Command Key Function Morse ID interval, Speed, and Frequency System Programmable FieldsCarrier Only Repeat Open Repeater User Programmable Fields Enable a UserRadio Parameters View All UsersCustomizing Your Accessories Low Battery AlertProgramming Over-The-Air Entering the Program ModeEntering a Command Exiting the Program ModeProgram Mode Access Code System CommandsMic Dtmf Hang Time Station ID Interval Carrier Repeat CSQ UserSystem ID User Station ID FrequencyStation ID Speed Table A-1. Dtmf System Commands Function Parmeter Appendix a Dtmf CommandsTable A-2. Dtmf Diagnostic Commands Function Parameter