User's Manual

905U-D Radio Modem Module User Manual
Page 40 © May 2000
Spurious emissions RX - <-57 dBm
TX - <-37 dBm
Frequency Stability +/- 1. 0 kHz
Receiver Sensitivity 0.4uV at 12dB SINAD
Signal detect / RSSI -120 to -80 dBm
Expected line-of-sight range
@ 4800 bit/sec
2 km @ 10mW EIRP
5 km @ 100mW EIRP
10 km @ 500 mW EIRP
Range may be extended by up to
5 intermediate modules as
repeaters, in controlled mode
Aerial Connector Female BNC coaxial Protected by gas discharge
surge arrestor
Serial Ports
RS232 Port DB9 male DCE RTS/CTS/DCD hardware signals
provided
RS485 Port 2 pin terminal block Typical distance 1 - 2 km
Data rate (bit/sec) -
configurable
50, 75, 150, 300, 600,
1200, 2400, 4800, 9600,
19200, 38400
Byte format 7 or 8 data bits Stop/start/parity bits configurable
Output Signal
DCD (communications)
active
FET output, 30 VDC
500mA
In transparent mode:
always ON.
In controlled mode:
ON when radio link is established
System Parameters
Operating modes Transparent mode
Controlled mode
Broadcast system
Addressed communications with
acknowledged
System address Configurable 15 bit
User Configuration Hayes commands from host
device.
Or via on-board DIP switches