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 Smart-2000 series(45Mb) of digital microwave transmission equipments developed by our company for broadcast television backbone network's transformation that are microwave transmission systems of new television ??voice??data integrated services .They can transmit 45Mb (21E1) of the main signal and auxiliary data. Equipment, mainly composed by the microwave transreceiver, a modem, switch, Multiplexer/Demultiplexer, video codecs and network management system, function components using plug-in design, can better solve the asymmetrical transmission demand of television system. It combines the flexibility of digital transmission of telecommunications and high efficiency of television transmission . System provides the DS3/E1 interfaces (conforming to ITU recommendations), It is conducive to co-network with SDH microwave transmission system or optical transmission system. Equipment placed in standard 19"cabinet (or 19"rack), elegant appearance. |
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application
??Television digital microwave backbone networking, or deploy network with SDH microwave transmission and optical transmission.
??Telecom operators' various digital communication networks.
??Digital communication network of water conservancy??electrical power??industrial and mining establishments??research institutions.
equipment characteristics:
?? Cost-effective, large transmission capacity
?? Simultaneous transmission of television, radio, voice and data.
?? Using the latest integrated circuits and FPGA technology.
?? Multi-protection measures: channel 1 +1 or 2 +1 protection, frequency diversity, spatial diversity and mixed diversity.
?? Standard DS3/E1 interface, flexible service access.
?? Auxiliary data channel, all fast business, network monitoring.
?? Indoor design, compact structure, easy maintenance.
main technology data:
transmission capacity: 44.736 Mbps
operating frequency band: 7/8GHz (11/13GHz optional)
Modulating Mode: QPSK
data interface: DS3/21E1
transmitting power(dBm): +30dBm (optional)
Intermediate frequency (MHz):70MHz
Noise coefficient(dB): 4.5dB
control range(dB): 50dB
frequency stability:20ppm
Threshold Level(dBm): -82(E-6)
ambient temperature: 0degrs~-+45degrs(guaranteed range)
-5drges - +50drges (normal operating)
relative humidity: 90%(+25drges, (no condensate)
altitude: 4000(m)
power supply: DC -24V (or) DC -48V
Typical Application:
Smart-2000 series(45Mb)equipments co- networking with SDH microwave transmission / optical transmission(Example of Shanxi broadcast television and Henan broadcast television project application)
Smart-2000 series 45Mb equipment networking, station diagram (configuration of positive forward transmission 2+1 and return transmission 1+1) -forward transmits 10 sets of programs and return transmits 3 sets of programs, and can provide 11 E1 interface to transmit the value added services of voice, data, etc.
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