Table Of Contents - RF Technology T220 Operation And Maintenance Manual

CONTENTS
Contents
1 Operating Instructions
1.1 Front Panel Controls and Indicators
1.1.1 PTT
1.1.2 Line
1.1.3 PWR LED
1.1.4 TX LED
1.1.5 ALARM LED
2 Transmitter Internal Jumper Options
2.1 JP2: EPROM type
2.2 JP3: Dc Loop PTT
2.3 JP4: Audio Input Source
2.4 JP6: Input Level Attenuation
2.5 JP7: Audio Response
2.6 JP8: Sub-audible Tone source
2.7 JP9/10/11: dc Loop Configuration
3 Transmitter I/O Connections
3.1 25 Pin Connector
4 Channel and Tone Frequency Programming
5 Circuit Description
5.1 VCO Section
5.2 PLL Section
5.3 Power Amplifier
600 Ω line Input
5.4
5.5 Direct Coupled Audio Input
5.6 Local Microphone Input
5.7 CTCSS and Tone Filter
5.8 Audio Signal Processing
5.9 PTT and DC Remote Control
5.10 Microprocessor Controller
5.11 Voltage Regulator
6 Field Alignment Proceudre
6.1 Standard Test Conditions
6.2 VCO Alignment
6.3 TCXO Calibration
6.4 Modulation Balance
6.5 Tone Deviation
6.6 Deviation
6.7 Line Input Level
6.8 Output Power
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RF Technology T220