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Yuncheng Microwave Transmission system, bear in Shanxi TV station, the Yellow River Television, TV Yuncheng, Yuncheng people Yuncheng news radio and the transmission of multiple signal task. The system Digital Transformation of the former is used in microwave factory in Xi'an eighties of last century the production of WSF8-03 analog microwave transmission equipment, with the rapid development of digital technology behind the simulation image and sound broadcasting has been unable to meet the changing requirements of the development of electronic technology. In Shanxi Province Radio and TV Council under the unified arrangement and deployment, Yuncheng microwave transmission system in December 2006, respectively, and in May 2007, completed the digital transformation, and had 1 +1 system backup. After a year of system operation, radio and television signal transmission quality has greatly improved; After a year of use and maintenance, also contributed to our technical staff to learn some digital microwave transmission knowledge and skills of a number of related equipment maintenance experience. I. Introduction Yuncheng digital microwave system Yuncheng in Shanxi Province in the southernmost station is a terminal station, the original site is located in Yuncheng Municipal Building on December 2006, when the move to digital transformation of all transmitters in Yu. The station is in north latitude 35 ° 03'27 .29 ", longitude 111 ° 0'52 .49", station site linked to the high 369 meters, 40 meters high hanging antenna, magnetic declination 377, communications magnetic azimuth 359.85 degrees, 1.32 degrees Elevation of Antenna from the Ji Wang on the station 36.17 km mountain. Yuncheng station and the Ji Wang Hill Station point PDH microwave transmission system with transmission to the appropriate digital transformation. PDH digital microwave capacity of 45MB, 2MB Interface for 21. Yuncheng stop firing frequency 7925.60MHz, receiving frequency 8236.92MHz, while receiving two-way Digital TV Signals, return two sets of digital television signals, digital two-way radio signals. Yuncheng stop signal flow shown in figure 1. Figure 1 2, microwave functions and features of digital equipment 1.45MBPDH digital microwave Communication Equipment Yuncheng microwave transmission system using the south of Guilin NEC communications equipment engineering company has introduced internationally renowned companies such as design and manufacture of integrated circuits and using the latest FPGA technology with the introduction of SMART-2000-type 45MBPDH digital microwave transmission system. The system is designed to broadcast digital television transmission system reform and the development of episodes of TV, radio, voice, data and other integrated services digital microwave transmission equipment. Mainly by the microwave transmitters, QPSK Modem , 45MB complex demultiplexer, an operation, control and power supply components, the system combines radio and television transmission of high-efficiency and flexibility of digital transmission telecommunications, capable of transmitting digital television signals 7 Road and 30 Road, 2Mbps interface voice. The equipment is technologically advanced, flexible networking, installation, easy maintenance, transmission capacity, more business for future transmission provides a good platform. 2.SMART-2000-type machine hanging box channel SMART-2000-type channel machines hanging box includes six plugin section. That is prepared to receive plug-in, write plug-in, modem plug, power plug, monitor plug and 1 +1 switching plug-in. They are housed in the public unit, known as the channel linked to me. Hanging in a box with two sets of machines and a control channel plug-ins. Two channels in the terminal machine equipment for the main one, when there is trouble along the channel when the machine can automatically switch to another way channel machine work; in the relay station two aircraft were on the up and down the channel in both directions. Channel mouth and IF microwave machine I are hanging in front of me, and a variety of data interfaces are linked to box behind home plate, the data input, including modulation of 45M, 45M output demodulation of two-way, public service channel input RS232 data output and two input and output (where the first 2-way channel for the monitor). In addition, the mother board also has a built-45M 2 Distributor For 1 +1 switching systems. I am an expert from causticsodasupplier.com, while we provides the quality product, such as China caustic soda solid , caustic soda flakes Manufacturer, ,and more.
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