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 | 2007530 mm |
| Weight without antenna no more | 750 g |