PURPOSE:
      Digital Radiorelay Station is intended for the organization of connection up to eight intervals on distance of 450 km.
      Connection is carried out in a batch mode in local network Ethernet 10 Base T with the organization of voice communication and signaling of telecontrol, the telesignal system and remote control.
THE STATION PROVIDES THE FOLLOWING OPERATING MODES:
      - mode of retransmission;
      - mode of radio silence;
      - mode of standby.
      - mode of data transmission in a batch mode in local network Ethernet 10 Base T;
      - control mode by station from a control panel or from a computer on joint RS 232;
      - mode of the automatic control at which the control of serviceability of the equipment is provided;
      - mode of automatic installation of operating frequencies of station at which the opportunity of adjustment for the allocated fixed frequencies of reception and transfer is provided, in view of a protective interval - 43 MHz.
TECNICAL CHARACTERISTICS
      - frequency range, MHz 375-850;
      - frequency quantity 80,0;
      - frequency step of a grid 1,0;
      - transmission rate in channel Ethernet up to 2048 kbps in both directions.
TYPE OF THE AERIAL AND ITS CHARACTERISTIC:
      - lagoperiodic antenna two-element lattice;
      - amplification rate of the aerial not less than 10 db;
      - voltage standing-wave ratio of aerials in a operating band no more than 1,8.
RANGE OF COMMUNICATION:
      - on open lines at direct visibility between the aerials, the sure connection can be provided on distance up to 60 km;
      - the probability of a mistake makes no more than 10^-6 for 99,4 % of an operating time.
CAPACITY OF THE TRANSMITTER:
      - value of target capacity of the transmitter not less than 10 watt;
      - a deviation of capacity of the transmitter from rating value at influence of destabilizing factors no more ±1,5 db;
      - capacity of the transmitter of station is operatively adjusted within the limits of 30 db with step 1 db, relative to a nominal level;
      - out and collateral radiations of the transmitter of station make not less then -60 db;
      - VSWR of antennas in frequency band no more 1,8.
THE STRIP OF RADIATION OF THE TRANSMITTER OF STATION SHOULD NOT EXCEED:
      - on a level a minus 3 dB - 1,4 MHz;
      - on a level a minus 30 dB - 2,52 MHz.
SENSITIVITY OF THE RECEIVER:
      - sensitivity of the receiver of station at a level of mistakes rate (BER) 1*10^-3 there should be not less a minus 121 db/watt;
      - a dynamic range of the receiver of station not less than 60 db;
      - selectivity of the receiver on the next channel, at adjustment ±42 mhz not less than 70 db;
      - selectivity on the mirror channel of reception not less than 80 db.
STABILITY OF FREQUENCY:
      - relative stability of operating frequency of the transmitter (receiver) of station not less 2*10^{-6, with temperature range -20- +50 C.}.
POWER SUPPLIES OF STATION:
      - power supplies of station are provided with a source of a direct current a voltage (+27±5) V;
      - power consumed by station, do not exceed 130 watt.
THE MONITORING SYSTEM:
      - the monitoring system of station provides the control, management and indication of a condition of connection, and also a condition of blocks and indication of malfunction of blocks using the data of internal sensor and your PC through RS232 junction.
WEIGHT AND DIMENSIONS:
      - the weight of station 50 kg, overall dimensions 480*350*340 mm (width*height*depth*).
STATION INCLUDES:
      - antenna АРКА 464651.001 - 2 units;
      - cabel АРКА 686 661.051 - 2 units;
      - receiver;
      - head phones АР 870;
      - agreed loading;
      - blockк DRRS АРКА 464413.018;
      - receiver АРКА 434855.028;
STATION INCLUDES:
      - transmitter АРКА 434852.027;
      - * modem АРКА 467764.004;
      - antenna block АРКА 431126.014.

TECNICAL CHARACTERISTICS

The code of a product	Range of frequencies, MHz	Quantity operating frequencies	Step of a grid of frequencies, MHz	Spacing between frequencies of transmitter and receiver, MHz, not less
АРКА 464.413.017	375-695	80	1,0	43,0

      * Optionally the station can be supplied with modem for organization of communication E1 (ISDN PRI) through RS232 junction.