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Radio relay equipment of 7...40 GHz range (overview)


    Digital radio relay station "Contact" (DRRS) operate in the frequency range of 7...40 GHz and are designed to organize one broadband radio channel single- and multi-span radio relay links, with bandwidth up to 34 Mbps for telephone, internet or other applications.
    The frequency band DRRS depends on the data throughput DRRS see table

Signal bandtwidht Data throughput
28 MHz 161 or 32Mbps Ethernet
14 MHz 81 or 16Mbps Ethernet
7 MHz 41 or 8Mbps Ethernet
3,5 MHz 21 or 4Mbps Ethernet

     DRRS "Contact" produce with redundance 1+1 and without redundance.
     With the help of service program it allows remote monitoring and control of all stations multispan radiorelay system through telemetry and remote signaling.
     RRL powering ~ 140...260V (AC voltage) with the ability to connect back-up voltage 24...60V (DC voltage).
     Dynamic allocation of traffic (the resources of any unused E1 automatically transferred via Ethernet) makes it easy to use.
    The company manufactures Converter CAE-110 of 2 independent audio channels of studio quality (no compression) in the digital stream E1 and back. This allows to trasmit from 2 to 32 audio channels through selected DRRS.
    High-speed stantions DRRS 155Mbps are produced in the frequency range 10,7...11,7 GHz with Ethernet bandwidth up to 100Mbps at the interface 100BASE-TX and up to 150Mbps at the interface 1000BASE-T. Modulation mode is QAM64, operating distance is up to 20 km.

Operating frequency range DRRS name Modulation kind/
Bandwidth
Data throughput Receiver sensitivity BER=10-6, dBm Communication range at power transmitter in 50mW, antenna ⌀ 0,9m
Medium-speed DRRS
7,25...7,55 GHz Contact-7.216 QPSK/28MHz 161 or 32 Mbps Ethernet -77 dBm 35 km
Contact-7.28 QPSK/14MHz 81 or 16 Mbps Ethernet -80 dBm 35 km
Contact-7.28 QPSK/7Mhz 41 or 8 Mbps Ethernet -82 dBm 35 km
Contact-7.22 QPSK/3,5MHz 21 or 4 Mbps Ethernet -87 dBm 35 km
7,90...8,40 GHz Contact-8.216 QPSK/28MHz 161 or 32 Mbps Ethernet -77 dBm 35 km
Contact-8.28 QPSK/14MHz 81 or 16 Mbps Ethernet -80 dBm 35 km
Contact-8.24 QPSK/7MHz 41 or 8 Mbps Ethernet -82 dBm 35 km
Contact-8.22 QPSK/3,5MHz 21 or 4 Mbps Ethernet -87 dBm 35 km
10,70...11,7 GHz Contact-11.216 QPSK/28MHz 161 or 32 Mbps Ethernet -77 dBm 35 km
Contact-11.28 QPSK/14MHz 81 or 16 Mbps Ethernet -80 dBm 35 km
Contact-11.24 QPSK/7MHz 41 or 8 Mbps Ethernet -82 dBm 35 km
Contact-11.22 QPSK/3,5MHz 21 or 4 Mbps Ethernet -87 dBm 35 km
12,75...13,25 GHz Contact-13.216 QPSK/28MHz 161 or 32 Mbps Ethernet -77 dBm 35 km
Contact-13.28 QPSK/14MHz 81 or 16 Mbps Ethernet -80 dBm 35 km
Contact-13.28 QPSK/7MHz 41 or 8 Mbps Ethernet -82 dBm 35 km
Contact-13.24 QPSK/3,5MHz 21 or 4 Mbps Ethernet -87 dBm 35 km
14,40...15,35 GHz Contact-15.216 QPSK/28MHz 161 or 32 Mbps Ethernet -77 dBm 25 km
Contact-15.28 QPSK/14MHz 81 or 16 Mbps Ethernet -80 dBm 25 km
Contact-15.24 QPSK/7MHz 41 or 8 Mbps Ethernet -82 dBm 25 km
Contact-15.22 QPSK/3,5MHz 21 or 4 Mbps Ethernet -87 dBm 25 km
17,70...19,70 GHz Contact-18.216 QPSK/28MHz 161 or 32 Mbps Ethernet -77 dBm 25 km
Contact-18.28 QPSK/14MHz 81 or 16 Mbps Ethernet -80 dBm 25 km
Contact-18.24 QPSK/7MHz 41 or 8 Mbps Ethernet -82 sBm 25 km
Contact-18.22 QPSK/3,5MHz 21 or 4 Mbps Ethernet -87 dBm 25 km
High-speed DRRS
7,25...7,55 GHz
7,90...8,40 GHz
10,70...11,70 GHz
12,75...13,25 GHz
Contact-11.1001
definition is for the range 10,7-11,7 GHz
QAM16/32MHz 100 Mbps Ethernet -70 dBm 40 km / at capacity 500 mW
7,25...7,55 GHz
7,90...8,40 GHz
10,70...11,70 GHz
12,75...13,25 GHz
Contact-11.1001 3*ASI, ETH
definition is for the range 10,7-11,7 GHz
QAM16/32MHz 3 ASI in 31,5 Mbps + 3 Mbps Ethernet -70 dBm 40 km / at capacity 500 mW
7,25...7,55 GHz
7,90...8,40 GHz
10,70...11,70 GHz
12,75...13,25 GHz
Contact-11.1551
definition is for the range 10,7-11,7 GHz
QAM64/32MHz 155 Mbps Ethernet -64 dBm 20 km / at capacity 100 mW
7,25...7,55 GHz
7,90...8,40 GHz
10,70...11,70 GHz
12,75...13,25 GHz
Contact-11.1551 3*ASI, ETH
definition is for the range 10,7-11,7 GHz
QAM64/32MHz 3 ASI in 45 Mbps + 3 Mbps Ethernet -64 dBm 20 km / at capacity 100 mW
7,25...7,55 GHz
7,90...8,40 GHz
10,70...11,70 GHz
12,75...13,25 GHz
Contact-11.3101ETH
definition is for the range 10,7-11,7 GHz
QAM64 310 Mbps Ethernet -61 dBm 10 km / at capacity 100 mW