Table Of Contents - RF Technology R220 Operation And Maintenance Manual

CONTENTS
Contents
1 Operating Instructions
1.1 Front Panel Controls and Indicators
1.1.1 Mon. Volume
1.1.2 Mon. Sq.
1.1.3 N. SQ
1.1.4 C. SQ
1.1.5 Line
1.1.6 PWR LED
1.1.7 SQ LED
1.1.8 Alarm LED
2 Receiver Internal Jumper Options
2.1 JP1: 240Hz Notch Filter
2.2 JP2: Audio Response
2.3 JP3: Audio Filter In/Out
JP4: 600 Ω Line dc Loop COS
2.4
2.5 JP6: COS Polarity
2.6 JP7/8/9: dc Loop COS Configuration
2.7 JP7, JP8, JP9: Direct Output COS
2.8 JP11 EPROM Type
3 Receiver I/O Connections
3.1 25 Pin Connector
4 Channel and Tone Frequency Programming
5 Circuit Description
5.1 RF Section
5.2 IF Section
5.3 VCO Section
5.4 PLL Section
5.5 Audio Signal Processing
5.6 Noise Filter, Amplifier and Detector
5.7 Subtone Filter and CTCSS
5.8 External Squelch
5.9 Microprocessor Controller
5.10 Carrier Operated Switch
5.11 Voltage Regulator
6 Alignment Procedure
6.1 Standard Input Signal
6.2 RF Alignment
6.3 IF Alignment
6.4 Line Level Adjustment
6.5 Reference Oscillator Calibration
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RF Technology R220