Service manual

TABLE OF CONTENTS
CHAPTER 1 INTRODUCTION 1
1.1 The RC2000 Antenna Controller Family 1
1.2 Tracking Inclined Orbit Satellites 2
1.3 RC2000B/C Tracking Algorithm 2
1.4 Specifications 3
CHAPTER 2 THEORY OF OPERATION 5
2.1 System 5
2.2 Digital Board 5
2.2.1 8097BH Micro-Controller and Support Peripherals 5
2.2.2 Keypad 8
2.2.3 LCD Display 8
2.2.4 Motor Control Circuitry 8
2.2.5 Description of the signals which control the state machine and which are generated by
the state machine 8
2.2.6 Pulse Position Sensors 11
2.2.7 Signal Strength Input Circuits 12
2.2.8 RS-422 Serial Port 12
2.2.9 Polarotor Drive Circuit 12
2.2.10 5 Volt Power Supply 12
2.2.11 Parts List 12
2.3 Drive Board 15
2.3.1 Assembly Diagram 15
2.3.2 Circuit Description 15
2.3.3 Current Sensing Circuitry 15
2.3.4 FET H-bridge 18
2.3.5 Biasing of the MOSFETs 18
2.3.6 Parts List 19
CHAPTER 3 ACCEPTANCE TEST PROCEDURE 21
CHAPTER 4 COMMON RC2000 QUESTIONS 23
4.1 Invalid Data Entry 23
4.1.1 Background 23
4.1.2 Events Typically Associated with the INVALID DATA ENTRY Error Message 23
4.1.3 Azimuth and Elevation Limits 23
4.1.4 Changing the Polarization Control Device Associated with the Controller 23
4.1.5 INVALID DATA ENTRY Error Message Due to Polarization Position Data 24
4.1.6 No Polarization Control Device Attached to the RC2000 25
4.2 Antenna Azimuth and Elevation Errors 25
4.3 Antenna Position Sense Errors 26
4.3.1 Causes of Antenna Position Count Errors 26
4.4 Track Mode Limit Error 26
4.5 Gaps in the Program Track Table 27
4.6 TRACK Mode PEAK LIMIT Error 28
4.6.1 Mechanical Hysteresis in the Mount 28
4.7 DH Gibralter Mounts 29
4.8 AGC Input Notes 29
4.8.1 AGC Input Voltage Range 29
CHAPTER 5 UPGRADING THE RC2000 31
5.1 Updating RC2000 and Nomad Model Antenna Controllers 31
5.2 Installing the Upgrade and Restoring Non-Volatile Memory 31
CHAPTER 6 USING THE RS232-RS422 PROTOCOL CONVERTER 33
6.1 RC1KADP RS232 to RS422 Protocol Converter 33
6.2 RC1KADP Checkout Procedure 33
6.3 Alternate Test Procedure for the RC1KADP 36
6.3.1 Test Procedure for RS485A1 Board (RC1KADP) 36