It is intended for increasing of GSM mobile communication service zone in places with a low level.

Repeater’s using allows provide a reliable phone communication in places with impossible communication for some reason.
To a category of such places are referred so-called, «shadow areas» — basements, hangars, shopping centers, vestibules, or premises with thick walls.
The repeater amplifies a signal and allows stabile phone communication reducing risk of its loss or interruption at the lowest signal level.

Advantages:

-decrease of a microwave irradiation of the subscriber at the cost of a power decreasing, demanded for reliable reception;
— increasing of accumulator work duration without recharging of a battery.

At base station direct visibility the repeater installation is simple and does not demand the special equipment.

Delivery complete set:

• transceiver module………….. 1pc.;
• antenna as «wave duct»………1pc.;
• connecting cables.

 It is possible manufacturing of antennas with a spectral radiation (reception of three operators is provided) on the customer’s request.

SPECIFICATIONS

Communication standard	GSM 900
Power supply	(220±10%) V
Maximal output power	200 mW
Gain factor	35 dB
Noise factor	no more than 5 dB
Irregularity of amplitude-frequency characteristic	± 1,5 dB
Power consumption not more than	10 W
Size	210x150x140 mm
Weight	600 g
Operation temperature range	+5…+50 °C
Antennas connector type	CР-50-159ФВ
Number of subscribers
— at call waiting	up to 75
Number of subscribers’ conversations in a service area of a repeater is 25.

Multi-channel radio system of  synchronous translation is a complex of hardware for transfer to broadcast speech of orators and for organization  of synchronous translation speech of orators on one or few languages.
Using of the given system allows to increase  level of holding of conferences, meetings and  business meetings with foreigners’ participation.

Common units of the system are: 
— transmitters with telescopic antennas  (it is necessary one transmitter for orators  speech translation and one transmitter for synchronous translation of each language);
— handsets for interpreter;
— radio receivers;
— complex of jumper cables;
Provides:
    — quality and reliability;
— stable work at participants movies in room;
— simultaneous use of any quantity  of radio receivers.

System is designed for organizing of  movable wireless video communication.

The system consists of:
— transmitter  MARK-TV MOBILE/ TR;
— receiver      MARK-TV MOBILE/ R;
— 2 antennas (at will of the customer or Rod-antenna, or V-antenna are delivered).

Channel selection is carried out by the push-button switch. The output power of transmitter can be changed by control button. Inputs and outputs of audio and video signals, indicators of channels and radiated power and supply tumbler have mounted on the front panel. Storage battery is delivered by separate order.

SPECIFICATIONS

	Transmitter	Receiver
Frequency range	1700….2150 MHz	1700-2150 MHz
Band of frequencies of one channel	28 MHz	28 MHz
Power consumption	3,5 W	2,0 W
Noise factor		6 dB
Output power	100 mW
Power supply	12…16 V	12….16 V
Dimensions	200x95x22 mm	200x95x22 mm
Weight	500 g	500 g

 

Input impedance of antennas	50 Ohms
Communication range of one interval with rod antenna within the line-of-sight distance	300 mm
Directivity:
— Rod-antenna	1,5 dB
— V-antenna	10 dB
Angular aperture of V- antenna	600C

The system of operative communication is intended for organization of the data transmitting network by wireless.

Radio modems (RM), which operates in a monofrequent duplex mode with time division of reception-transfer and use of pseudo-casual sequences by number of elements 127 are used as radio stations.

Following structure of systems is proposed:

· central station (CS);

· 16 subscriber’s stations (SS) i.e. radio modems (RM).

Before the operation, addressing of RM is carried out by the cartridge with SS addresses and operating codes. The device (cartridge) with SS addresses and operation codes are moved from CS.

Number of subscribers in subgroup is 16, and number of subgroup in one region is 6.

In that case RM-s operate on one logical direction.

It is intended for creation of multi channel radiotelephone communication:

a) for subscribers of out-of-the-way and remote regions, where there are not enough telephone lines;

b) between automatic exchanges (AE);

c) between subscribers of commutators (C).

It is used for creation of special types of communication and for development of operative channels at extreme circumstances.

Wireless extender provides high noise-immunity and reliability of transmitting information, by using of spread-spectrum systems of communication and digital processing of data with additional coding of information.

On the long distances it can be used as repeater with using of additional extender. Using method of the digital transmission and signals’ processing removes the limitation of retransmissions coefficient.

Wireless extender consists of station complete (SC) and subscriber complete (SbC). Main units of SC and SbC are radio modem (RM) and matching unit (MU).

Diagram of radiotelephone communication based on wireless extender