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The transmission principle of video baluns 2011-02-21

Using video baluns to transmission twisted-pair cablesignal, basic principle is:

1, the usual video signal, it is a kind of non-equilibrium way of video baseband signal, and is suitable for coaxial cable this non-equilibrium transmission cable transmission. While twisted-pair cable is a balance of transmission cable, just because the balanced transmission and cable double stranded model, make video baluns transmission have strong anti-jamming ability, so if you want to use video signal twisted-pair transmission, video signals must be converted into balance signals.

2,Convert video signal, the equilibrium pattern can be directly in twisted-pair cable on transmission, while it's not easily influenced by various interfering signal influence. To monitor terminal, due to the video, display and most monitors equipment input ports are dispute balance mode, so it need twisted-pair Mosaic of balance signals change into convert non-equilibrium signal. Namely, use twisted-pair video signal transmission line instead, only need before and after the end of the cable are added to a balance/non-equilibrium converter.

3, The simplest converter, is a high directed flux and high bandwidth on they can parallel and wound video mutual inductance coil essence, it is often said that the passive converters. It only as a balance/non-equilibrium transformation effect, a passive components, won't bring new distortion, also won't produce noise, but attenuation tol a certain degree of signa .

4, Due to the losing of signal attenuation, especially the attenuation signal transmission in twisted-pair cable on the high frequency, especially serious weight, so after video baluns transmission video signal, the balance after normally must pass a magnifying circuit amplifying and for signal especially high frequency signal attenuation situation, to advance ascension restores, and then converted to non-equilibrium signal, supplies, equipment use after class monitor, etc. Usually the amplifier is called twisted-pair receivers, the amplification, compensation effect, general above have two adjustable potentiometer, respectively according to actual condition to regulate the whole amplifier amplification of gain and high coefficients of the compensation amount.

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