MOST radio modem — Izhevskiy radiozavod

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MOST radio modem

The radio (radio modem) MOST is designed for digital data exchange over a radio channel in a simplex and (or) half-duplex mode.

Fields of application

exchange of data packages
telemetry with a bidirectional data flow
signaling systems
remote control of distant objects
control systems for production, transport industry

Description

The radio is connected to peripherals via a standard serial port RS-232. Power cables and antennas are connected to jacks on the modem rear panel. A metal housing ensures a high level of protection against external disturbance. Transceiver modules and power modules are rigidly attached to one another.

The radio (radio modem) has a wide range of service functions, which increase its performance characteristics; there is a possibility of measuring and outputting data on the level of an input signal, voltage standing-wave ratio of an antenna-feeder device, supply voltage, temperature inside the transmitter housing etc.

Technical characteristics

Parameter	Value
Transceiver operation mode: simplex and (or) half-duplex
Frequency band, МHz:
— «PP-М»	146—174
— «PP-D»	450—470
Data rate, bit/s	9600
Minimum frequency spacing, kHz	25
Transmitter input power, W	5; 10; 20*
Probability of invalid reception of bits at the input level of 2 mV at a rate of 9600 bit/s, (PP-М and PP-D), not less	1х10^-6
Probability of invalid reception of bits at the input level of 0.7 mV at a rate of 9600 bit/s, (PP-М and PP-D), not less	1х10*
Probability of data set delivery in noise free mode at the input signal level of 0.2 mV at a rate of 9600 bit/s	0.9999
Number of channels	up to 16
Modulation	GMSK

* — other values can be programmed within 3—23 W.

Operating data

Parameter	Value
Operating temperature range, °С	-40…+60
Temperature storage limitation, °С	-50…+70
Time to failure, h	40000
Average lifetime, years, not less	15

MOST radio (radio modem) modifications

Version	Configuration	Frequency band, МHz	Power supply voltage, V	Mass, kg	Overall dimensions, mm
MOST-M/MOST-MM car version	PP-D/PP-М	450—470/ 146—174	13.2	1.7 ±0.2	220x230x48
MOST-М1/MOSТ-ММ1 locomotive version	PP-D/PP-М, BP 48/12 В		48.0	4.1 ±0.3	280x240x97
MOST-S/МOST-SМ fixed version	PP-D/PP-M, BPS 220/12 V		220.0	7.3 ±0.3	280x230x171
MOSТ-S1/МОSТ-SМ1 fixed version	PP-D/PP-М, BPS 220/12 V*		220.0	7.3 ±0.3	360x230x171
МОSТ-L locomotive version	PP-МL, BP 48/12 V	146—174	48.0	4.1 ±0.3	280x240x97
МOSТ-V van version	PP-МV		13.2	1.3 ±0.2	206x142x60
МОSТ-МL car version	PP-МL		13.2	1.7 ±0.2	220x230x48
МОSТ-SL fixed version	PP-МL, BP 48/12 V		220.0	7.3 ±0.3	280x230x171
МОSТ-SL1 fixed version	PP-МL, BPS 220/12 V*		220.0	7.3 ±0.3	360x230x171