Table 1. Characteristics of domestically produced radio modems.

Table 1. Characteristics of domestically produced radio modems..

Table 1. Characteristics of domestically produced radio modems

Name	Operating frequency	Modulation type	Transmission rate	Coding method	On-air protocol	Voltage nutrition	Output power	Sensitivity	Note
Bridge	450 – 470 MHz	FSK	9600 bps	__	batch	12 V	5; 10; 20 W	2 µV (Roche = 10-6)	Finished block
Erika	146 – 174 MHz, 440 – 470 MHz	MSK	1200, 2400, 4800 Baud	__	transparent, packet	7.5 – 15 V	0.5 – 4 W	__	Finished unit, modem module
String 3	166.7 – 167.5 MHz	MSK	up to 4800 bps	__	Transparent	7 – 15 V	1 W	0.3 μV	The receiver and transmitter are made in different blocks
430 – 470 MHz	GMSK	4800, 9600 baud	CRC8 on 32 bytes, Hamming code (12,8), interleaved	Transparent, Packet	10 – 30 V	3.5 W	0.5 µV	Completed block
Spectrum 48	__	MSK	1200, 2400, 4800 bps	CRC8 32 bytes, Hamming code (12.8), interleaving	transparent, packet, retransmission	7 – 30 V	__	__	Radio station attachment
Seine 1	433.92 MHz +0.2%, fixed during manufacture	FSK	stream mode: 120 bytes per second	CRC; checksum of frames in a packet: 16 bits	transparent, packet	10 – 25 V	100 mW	__	Finished block
Integral 160/2400	136 – 174 MHz	MSK	2400, 4800 bps	__	batch	12 V ±15%	2; 5 W	__	Ended block
Smart 160/2400	136 – 174 MHz	MSK	2400 bps	__	batch , relay	10 — 15 V	2; 8 W	0.42 µV (at Rosh = 10-6)	Completed block
Granite R23-01	146 – 174 MHz	FSK	1200, 2400, 4800 bps	Reed-Muller code	transparent	12 V	5.0 ; 10.0 W	0.2 µV	Finished Block
Gamma	433.92 ±0.2%	FSK	9600, 19200 bps	__	transparent, packet, relay	5 – 15 V	10 mW	__	Finished block
Zarya-ATM	33 – 48.5; 57 – 57.5; 146 – 174 MHz	FSK	1200 bps	__	transparent	12 V	3/8/15 W	0.25 µV	Completed block
PR1200	__	FSK	1200 bps	CRC	batch	9 – 12 V	__	__	Add-on module for external radio station
RM 1200/2400	__	MSK	1200, 2400 bps	CRC	batch	__	__	__	Enabled between the terminal and radio station
DRM 1200	__	MSK	1200 bit/s	CRC	batch	__	__	__	Produced as a single-board module
GRX 9600	__	GMSК	9600 bps	Redundant encoding and data interleaving	Batch	__	__	__	Ended block
TRX 103	433.92 ±0.2%	MSK	2400 bps	CRC; Manchester	batch, transparent	10 – 25 V	__	__	Finished block