A local area network for simultaneous, bi-directional transmission of video bandwidth signals

摘要

A method for automatically equalising a signal sent over twisted pair wiring, comprising the steps of sending a reference frequency signal on the twisted pair wiring along with the signal to be equalised, receiving the signal a reception point (540) and then splitting the reference frequency signal off from the signal to be equalised at the reception point (540). The amount of attenuation of the reference frequency signal at the reception point is then measured, wherein a plurality of circuits (C1-C8) adapted to boost the signal are provided which circuits are automatically selectively engaged said circuits by means of digital control (716) to equalise the signal depending upon the amount of attenuation measured in the reference frequency.