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Twisted pair video transmission devices is the use of five types of network cable instead of coaxial cable , twisted pair video transmission equipment, use inexpensive, easily drawn more than five or five unshielded twisted pair (UTP computer network cable) four pairs of wire in the way a pair of wire transmission of high-quality video signals, the other twisted pair cable that can be used to transmit audio signals or control the head of the RS-485 data, but also can transmit more video signals, and signals no interference between the transmission distance of 0 to 1,500 meters optional. Not only solve the security and video advertising works Zhong Pu Tong existence of long-distance video cable Chuanshuxinhao serious distortion and in complex industrial environments electromagnetic video Ganrao , but also greatly save the Xianlu , construction and maintenance becomes very easy, Cheng Wei video monitoring project in addressing the 1-3 km long distance transmission issues in one of the most economical and practical approach.
The use of twisted-pair long, in many industrial control systems and interference in larger establishments as well as long-distance transmission of a twisted pair is used, we also used widely used LAN twisted pair right. The reason why such a broad use of twisted pair, because of its strong anti-interference, transmission distance, cabling is easy, inexpensive , and many other advantages. Twisted pair of signal attenuation there are large, twisted pair video signal directly within the transmission if the will decay much, so the video signal on the twisted pair to achieve the long-distance transmission, the need for amplification and compensation, Twisted pair video transmission devices that accomplish this function. Plus a pair of twisted pair video transceiver equipment, images can be transferred to the 1 to 2km. Twisted pair and twisted pair video transmission equipment prices are very cheap, not only does not increase the system cost, but the distance increases the cost compared with coaxial cable down a lot.
Therefore , security monitoring, multimedia network teaching system using twisted pair for transmission and so has obvious advantages:
1) The transmission distance, transmission of high quality. As in the twisted pair transceiver uses advanced processing techniques, to best compensate the twisted pair video signal amplitude attenuation and the attenuation difference between different frequencies, maintaining the original image brightness and color as well as real-time, the transmission distance of up to 1km or longer, the image signal almost no distortion. If using relay mode, the transmission distance will be longer. For example: You Trump Technology twisted pair transmitter.
2) to facilitate wiring , cable high utilization. A pair of ordinary telephone lines can be used to transmit video signals. In addition, the building blocks laid in a wide range of Category 5 unshielded twisted-pair get one pair in any way you can transmit video signals without additional wiring, even the re-wiring, Category 5 cable is also easier than coaxial cable. In addition, a Category 5 cable has 4 twisted pair, if you use a pair of lines to carry video signals, while a few of the lines can also be used to transmit audio signals, control signals , power supply, or other signals, to improve the line cable utilization, while avoiding a variety of signals alone the hassle of wiring to reduce the project cost.
3) anti-jamming capability. Twisted pair can effectively suppress common mode interference, even in strong interference environment, the twisted pair is also an excellent image signal can be conveyed. Moreover, the use of a twisted pair cable in a few of the different signals are transmitted, interference will not occur between each other.
4) high reliability , ease of use. Use of twisted pair transmission video signals, in the front end to access special transmitter in the control center to access special receiver. This twisted pair transmission equipment cheap, very easy to use, no expertise, nor too many operations, once installed, long-term stability.
5) The cheap, easily obtained. As is widely used in ordinary Category 5 unshielded cable , easy to buy, and the price is very cheap, to engineering to bring great convenience.
Twisted pair video transmission devices is the use of twisted pair transmission video signal is only in recent years the rise of technology, generally refers to the so-called twisted-pair cable, twisted pair transmission using differential transmission principle, in the video signal transform transmitter into the same magnitude, opposite polarity video signal, after transmission through twisted pair , at the receiving end will be two polar opposite of the video signal subtraction into the usual video signal, it can effectively suppress common mode interference, even in the strongly interference environment, its good anti-interference capability than coaxial cable, and video signals through the processing, the transmission of video signals clearer than coaxial cable, with a network cable between interference will not occur.
Advantages 1, to facilitate wiring , cable high utilization. A common network of over five lines, there are four pairs of twisted pair, can also transmit 4 video signals, or 3-way video, 1 channel control signal; better than coaxial cable and cable laying.
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