Operations Manual

Page 2 RF Technology R50
CONTENTS CONTENTS
Contents
1 Operating Instructions 1
1.1 Front Panel Controls 4
1.1.1 MON. Volume 4
1.1.2 MON. SQ 4
1.1.3 N. SQ 4
1.1.4 C. SQ 5
1.1.5 LINE 5
1.2 Front Panel Indicators 5
1.2.1 PER LED 5
1.2.2 SQ LED 6
1.2.3 ALARM LED 6
2 Receiver Options 6
2.1 Serial I/O Parameters 6
2.2 Receiver Low Battery Level 7
2.3 Audio High Pass (Notch) Filter 7
2.4 Audio Response 7
2.5 LOOP VOLTS Select 7
2.6 COS Polarity Select 7
2.7 COS Source/Sink Select 7
2.8 Channel Selectable Parameters 7
3 Receiver I/O Connections 8
3.1 25 Pin Connector 8
3.2 9 Pin Front Panel Connector 9
4 Channel Programming and Option Settings 9
4.1 Setting Options 9
4.2 Setting Channel Parameters 10
5 Circuit Description
5.1 R50 Master Schematic (Sheet 1) 11
5.2 Microprocessor (Sheet 2) 12
5.3 RF Section (Sheet 3) 14
5.4 Receiver Section (Sheet 4) 15
5.5 Voltage Controlled Oscillator (Sheet 5) 16
5.6 Audio Processing Section (Sheet 6) 16
5.7 Power Generation Section (Sheet 7) 17
6 Field Alignment (Calibration) Procedure
18
6.1 Standard Test Equipment 18
6.2 Invoking the Calibration Procedure 18
6.3 The "Miscellaneous" Calibration Procedure 19
6.4 The "Line" Calibration Procedure 20
6.5 The "Reference" Calibration Procedure 20
7 Specifications
21
7.1 Overall Description
21
7.1.1 Channel Capacity 21