The compressor is intended for matching of digital channel of communication  with various  communication lines.

Consists from:

• digital linear modem;
• matching unit (MU).

The equipment provides:

• multiplexing of 4 digital flows with 22 kbit/s speed in one general flow under the standard RS 232;
• joining each channel;

a) by two-wire line;

b) by four-wire line;

c) by telephone two-wire line;

d) by port RS 232.

The system is intended for sounding and providing of the simultaneous translation of interpreters and tour guides operating both indoors and outdoors modes.

This system provides the necessary level of quality of meetings, conferences and trips.
Advantages of this system are small dimensions and weight, and also operative preparation of system for operating.

The equipment consists of:

• central unit;
• microphone for the interpreter or guide;
• extension cord (with 10м of cable length  with  4-socket-outlets for plugging the earphones after each 1m);
• earphones.

 The GMC-1 is intended for acquisition and transmission of data, about of controllable object condition, through a cell-communication network to the server.

The GMC-1 includes:

•  the SIM900 system from GPRS module;
• processor;
• signals matching module;
• external GSM-antenna.

 

 The modular construction of the device and presence of the programmed processor allow using it in various systems of remote supervision and management.

The clock of a real time and reserve Li-Ion the accumulator, providing operation of controller at switching-off of an external feeding are built in the controller.

The device supports following interfaces: RS-485, RS-232, I²C, SPI, ONEWire.

Functional capabilities:

•  SMS sending and receiving;
• Data transmission and reception by GPRS;
• Reception and transmission of voice calls;
• Indication about of registration in the GSM network;
• Presence of dialing fixing number;
• Access implementation to SIM only through defined GSM network’s operator.

SPECIFICATIONS

Number of digital input/output	40
Number of analogue inputs (0…3V)	16
Supply voltage from constant-current source	6…40 V
Supply voltage from internal accumulator	3,7 V (1A per hour)
Current consumption at call waiting	30 mA
Current consumption at data transmission mode	300 mA
Operation time at feeding off-line mode, no more than
— at call waiting mode	33h
— at data transmission mode	3h
Current peak value	2 A
Digitization speed	500 ksps
Mobile class	B
GPRS standard	class 10

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

Radio modems (RM) allows organizing communication between the computers and local networks (to create radio networks).

A high noise-stability and reliability of the transmitted information is ensured due to using of spread-spectrum communication systems and digital transfer of date with additional coding of information.

Modems have the opportunity of simultaneous phone communication.

It can be used as repeater with unlimited retransmission coefficient.

RM-s — separate device, joined  to any standard computer.

RM-s are intended for operation in a continuous (round-the-clock) mode of reception and transfer in field conditions, on stationary and mobile objects.

RM driver gives possibility to exploitation all known programs in NETWARE, WINDOWS 95, 98.

The follwing RM modifications are proposed:                               

Type	frequency  range
RM-300	237,5…262,5 MHz
RM-825-01	812,5…837,5 MHz
RM-825-02	800,0…850,0 MHz
RM-925-01	912,0…937,0 MHz
RM-925-02	900,0…950,0 MHz
RM-2500-01	2487,0…2512,0 MHz
RM-2500-02	2475,0…2525,0 MHz