User's Manual

905U-D Radio Modem Module User Manual
Page 6 © May 2000
CONTENTS
CHAPTER ONE INTRODUCTION.......................................................................................... 8
1.1 GENERAL ......................................................................................................................... 8
1.2 TRANSPARENT MODE ....................................................................................................... 9
1.3 CONTROLLED MODE ...................................................................................................... 10
1.4 REPEATER UNITS ........................................................................................................... 11
CHAPTER TWO INSTALLATION.......................................................................................... 12
2.1 GENERAL ....................................................................................................................... 12
2.2 AERIAL INSTALLATION ..................................................................................................... 12
2.2.1 Dipole aerial...................................................................................................... 13
2.2.2 Three element Yagi aerial................................................................................. 13
2.2.3 Collinear (3dB) aerial........................................................................................ 14
2.3 POWER SUPPLY............................................................................................................. 15
2.4 SERIAL CONNECTIONS ................................................................................................... 15
2.4.1 RS232 Serial Port............................................................................................. 15
2.4.2 RS485 Serial Port............................................................................................. 16
2.5 COMMUNICATIONS OK (DCD) OUTPUT.......................................................................... 17
CHAPTER THREE OPERATION .......................................................................................... 18
3.1 POWER-UP AND NORMAL OPERATION ............................................................................. 18
3.2 SERIAL AND RADIO DATA ................................................................................................ 19
3.2.1 Character Type................................................................................................. 19
3.2.2 Serial Data Rate ............................................................................................... 19
3.2.3 Radio Data Rate............................................................................................... 20
3.3 TRANSPARENT MODE ..................................................................................................... 21
3.4 CONTROLLED MODE ...................................................................................................... 21
3.5 WHAT OPERATING MODE TO USE ?................................................................................. 25
3.6 OPERATING PROBLEMS .................................................................................................. 26
CHAPTER FOUR CONFIGURATION ................................................................................... 28
4.1 BEFORE CONFIGURING .................................................................................................. 28
4.2 CONFIGURATION MODE .................................................................................................. 28
4.3 HAYES COMMANDS ......................................................................................................... 28
4.3.1 Unit Reset......................................................................................................... 29
4.3.2 Storing Configuration Parameters - Write Registers....................................... 29
4.3.3 Default Values - Restore Factory Defaults ...................................................... 29
4.3.4 S-Registers ...................................................................................................... 29
4.3.5 Changing Destination/Repeater Address - autodial....................................... 33
4.3.6 Connecting to a Remote Module – single dial................................................. 34
4.3.7 Reading Configuration Parameters.................................................................. 34
4.3.8 Unit Test commands - AT&Tx........................................................................ 34