User guide

30 1892 1139 - RSX Range of Intelligent Modems User Guide - v7.1 / Nov 2007
4.4 TECHNICAL SPECIFICATIONS
Frequency range : RSX150G 100 - 225MHz (banded, fixed at manufacture)
RSX450G 400 - 470MHz (banded, fixed at manufacture)
RSX850G 868 - 870MHz
Usable band depends on frequency, please enquire.
RF preset channels : 80 (selectable via separate RS232 serial input, frequencies
programmable within band)
Channel programming : Table of 256 equally-spaced frequencies with common Rx-Tx
offset, or table of 80 individually-programmed frequencies and
Rx-Tx offsets.
Channel selection : 64 channels maximum using 6-bit parallel logic line input.
256 channels maximum using serial RS232 data word.
Serial/parallel selection switchable in real time.
Channel spacing : 12.5kHz/20kHz/25kHz available, fixed at manufacture
Data input/output : RS232
RF Baud rate : 4800 for 12.5kHz channel spacing and 9600 for 20kHz and
25kHz channel spacing (configurable)
Modulation type : GMSK
Data input/output rate : 300, 600, 1200, 2400, 4800, 9600, 19,200 and 38,400 baud
(configurable)
Source address : 0-255 (configurable)
Destination address : 0-255 (configurable)
Number of data bits : Fixed at 8. (Will accept 7 data bits with 8
th
bit parity: in this
case, set the modem parity to ‘None’).
Parity : None, odd, even (configurable)
Handshaking : RTS, CTS, DCD (squelch)
Supply voltage : 5V - 15V DC negative earth
Supply current : Varies with input voltage; see table on p.10
Tx/Rx switching time : 20ms
RF power output : 500mW (High); 5mW (Low) as standard (link-selectable); other
powers available
Interface connector : male 9-way D-type connector
RF connector : female BNC
Type approval : ETS 300 113; EN 300 220; ETS 300 086. UHF version also
MPT1411.
Size overall : 139 x 64 x 30mm (0.55 x 2.52 x 1.18")
Weight : 670g (23.6 oz)
Operating temperature : -10%C to +55%C
Storage temperature : -30%C to +70%C
General facilities : LED confirming functional state (Tx, Rx, fail)
Power save facility : Logic input provides on/off switching
Tx forcing mode : Configures the modem to transmit regardless of squelch state
Packet size : Configurable for 64 or 128 bytes.
For data packets <64, set modem to 64
For data packets >64, set modem to 128 (more efficient for
large data packets)
Cyclic Redundancy Check: Received data is checked and if a CRC error is detected the
packet is discarded. Set to ‘disable’ if using external error
checking or system can cope with some corrupt data.