SATELLINE-3AS NMS / NMS Epic / NMS 869 / VHF
User Guide, Version 1.0
9
Designing Systems and Networks............................................... 27
INTERFACE - CONNECTORS & LEDS .............................................. 28
Antenna connector ................................................................... 28
LED indicators .......................................................................... 28
D15 connector ......................................................................... 29
SERIAL INTERFACE ....................................................................... 30
RS-232 interface ...................................................................... 30
RS-422 interface ...................................................................... 31
RS-485 interface ...................................................................... 32
Termination of RS-422/485 lines................................................ 32
Serial interface, data format ..................................................... 33
Handshaking lines .................................................................... 34
5.6.1 CTS line...................................................................................................................34
5.6.2 CD line....................................................................................................................34
5.6.3 RTS line ...................................................................................................................35
5.6.4 DTR line...................................................................................................................35
5.6.5 DSR line...................................................................................................................36
Pause length............................................................................ 36
RF INTERFACE ............................................................................. 37
Transmitter .............................................................................. 38
Receiver .................................................................................. 39
6.2.1 RSSI and RSSI threshold level....................................................................................39
Error correction ........................................................................ 40
Error checking .......................................................................... 40
Dual band version .................................................................... 41
Dual channel operation............................................................. 41
6.7 TX Delay ................................................................................. 42
6.8 Sync Interval............................................................................ 42
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