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Tait T800 SL2 25W User Manual

Tait T800 SL2 25W
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M8SL2-00-002-812 1
© Copyright Tait Electronics Limited August 2004. All rights reserved.
T800 SL2
Base Station Equipment
400 to 520MHz 25 Watt Continuous
Service Manual
August 2004
M8SL2-00-002-812

Table of Contents

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Tait T800 SL2 25W Specifications

General IconGeneral
BrandTait
ModelT800 SL2 25W
CategoryAccessories
LanguageEnglish

Summary

T800 SL2 Base Station Equipment

Service Manual

Indicates that this document is a service manual for the T800 SL2 Base Station equipment.

1 T800 Product Codes

Part A Introduction To Servicing

Component Replacement Procedures

Details methods for replacing leaded components, surface mount devices, and cased mica capacitors.

1 General

1.2 Caution: CMOS Devices

Warns about the susceptibility of CMOS devices to static discharge and recommends antistatic precautions.

1.3 Caution: Aerial Load

1.4 Caution: Beryllium Oxide and Power Transistors

2.3 Disassembly/Reassembly

3 Component Replacement

3.1 Leaded Components

Describes two methods for removing leaded components from plated-through hole PCBs.

3.2 Surface Mount Devices

Part B T855 Receiver

2 Circuit Operation

Describes the circuit operation of the T855 receiver, covering various sections and block diagrams.

3 Initial Tuning and Adjustment

Details tuning and adjustment procedures, including channel programming and synthesiser alignment.

5 Fault Finding

Provides test procedures and flow charts to help locate hardware problems in the T855 receiver.

1 T855 General Information

2 T855 Circuit Operation

2.2 Receiver Front End

Describes the receiver front end, including filters, amplifiers, and mixer stages.

2.5 Noise Mute (Squelch)

Explains how the noise mute operates on detected noise outside the audio bandwidth.

2.7 Audio Processor

Details the audio processor's function, including recovered audio processing and output paths.

2.8 Power Supply And Regulators

Explains the power supply design, operation voltage, and the function of various regulators.

2.9 Microcontroller

Describes the overall system control using the 80C51 microcontroller and its main tasks.

3 T855 Initial Tuning and Adjustment

3.4 Short Tuning Procedure

Outlines the short tuning procedure for reprogramming the receiver to a frequency outside its switching range.

3.6 Synthesiser Alignment

Details steps for synthesiser alignment, including connecting voltmeter and tuning VCO trimmer.

3.7 PA Alignment

Describes the procedure for aligning the PA output power, including connecting a power meter.

4 T855 Functional Testing

5 T855 Fault Finding

Part D T803-02-9000 Tone Remote

2 Circuit Operation

Describes the circuit and operation of the T803 Tone Remote, including block diagrams.

3 Installation and Configuration

Details how to install, configure, and test the T803 Tone Remote in a T800 SL2 sub-rack.

1 General Information

1.2 Specifications

Lists detailed specifications for the T803 Tone Remote, including line levels and tone parameters.

2 Circuit Operation

2.2 Tone Detection

Explains how the T803 detects guard tones, function tones, and keys the transmitter.

2.3 Alarm Monitoring

Details the T803's monitoring of eight alarm sources and how alarms are latched and actioned.

3 Installation and Configuration

3.3 Fault Finding

Provides steps for troubleshooting common issues with the T803.

Part F T800-23-0011 Power Supply

1 General Information

Provides a brief description of the T800-23-0011 Switch Mode Power Supply and its specifications.

2 Power Supply Description

Describes the components of the T800-23-0011 power supply, including PSU module and loom.

4 Functional Testing

Outlines test procedures to confirm the T800-23-0011 is set up correctly and operational.

5 Troubleshooting

Lists possible power supply fault symptoms, causes, and solutions.

6 Service Information

Provides specific information on servicing procedures for the T800-23-0011.

Part G Installation and Configuration

3 Talk Through Repeater

Describes the configuration for a talk-through repeater where receiver keys transmitter.

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