Digital Radio-Modem RM-D

The RM-D provides transmission and reception of the digital information on the radio channel in UHF range.

The radio modem uses the external protocol of data exchange on RS-232 interface for data exchange.

Has the built-in specialized transceiver.

The indicator of receiving power that gives the opportunity to carry out adjustment of the antenna without special equipment is installed on the RM-D panel.

  The distance between information interchange points depends on type of antennas and length of the cables connecting the RM-D with antenna.

It is used in electrical power engineering; in meteo, gas, seismic services; water supply; at management of industrial devices.

The system of the communication and data exchange organization includes:
– digital radio modem………………………………….2 pcs.
– antenna………………………………………………… 2 pcs.
– cable connecting antenna with RM-D ………….2 pcs.

SPECIFICATION 

Central working frequency (433±50ppm) MHz
Working frequency range 0…65 kHz
Supply voltage from direct current 12±2 V
Transmitter output power P-1dB, no less than 25…37 dBm
Digital flow velocity no more 2 kbaud
Type of digital information security CRC 16
Sensitivity of receiver at BER 10-3, no more minus 100 dBm
Communication two-way alternate
Modulation FSK
Output/ input signals type ТTL
Galvanic isolation between output and input 5000 V
Overall dimensions 200–75–30 mm
Weight without antenna no more 750 g
Digital Radio-Modem RM-D

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