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Manuals
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AWA Manuals
Two-Way Radio
RT-85
Technical handbook
AWA RT-85 Technical Handbook
Carphone
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Table Of Contents
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Contents
Table of Contents
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Table of Contents
Table of Contents
Specifications
Transmitter Specifications
Receiver Specifications
Features & Options
Standard Features
Hardware Options
Ctcss
Selcall
Programming Features
Externally Connected Options
Operating Instructions
Standard Equipment
Power On/Off
Channel Selection
Transmitting
Channel Scanning
Scanning Operation
Operating with CTCSS Encoder
Operating with Standard Selcall Decoder/Encoder
Receiving Calls
Theory of Operation
Synthesizer
Transmitter
Receiver
Microcomputer and EPROM
Transceiver Block Diagram
Transmitter Assembly
General Description
Circuit Description
Central Microprocessor
Control Unit
Internal Logic
Central Microprocessor Controls
EPROM and PLL Control
Master Frequency Oscillator
Main Frequency Synthesizer
EPROM and Shift Register
Programmable Dividers, Prescaler and Phase Detector
Voltage Controlled Oscillator and Buffers
Transmitter Audio Circuit and Phase Modulator
Transmitter Phase Locked Loop
Exciter Output and out of Lock Protection
Transmit Phase Locked Loop
DC Power Regulations
Top Side
Bottom Side
Receiver Assembly
Identification
Front End, Mixer and First if
Second if and Discriminator
Noise Squelch and Audio Gate
Speaker Amplifier
DC Input Relay
Power Amplifier Assembly
Power Amplifier Circuit
TX/RX Antenna Switch
PA Power Detector and Regulator
Antenna Low Pass Filter
Adaptor Assembly
Audio Mute
LED Drivers
Display Multiplexing
Control Unit Display/Switch Interconnection
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