BALANCED SIGNAL
A signal that is divided into two antiphase signals, traveling on two wires (and sometimes with a third - a ground reference wire). Transmitting a balanced signal achieves better signal to noise ratio, and the signal is more immune to noise and interference. The receiving end requires a differential amplifier, which amplifies only the differences between the antiphase signals, thus canceling noise picked up on the way. The balanced system is used either when very low signals are to be transmitted over long distances (such as those generated from high quality microphones) or at broadcast audio studios for highest quality signal recreation. The balanced signal system is used in TP (Twisted Pair) wire setups when it is essential to use non-coaxial wires for data, video, audio or graphics transmissions.
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