A video compensation system for analog video transmission is described.
The compensation system is employed in an analog video switching circuit
such that each time a conductive path is switched, the system
automatically tests the new switch path for a new compensation value. The
compensation value is determined by measuring the response of the new
path to a set of tones that are applied to the conductive path, the
response to which is measured against a table of responses previously
recorded. The measured responses are compared to the recorded responses
to determine an appropriate compensation control voltage, which is
applied to an equalizer system. In an alternative embodiment, the skew
compensations also provided between red, green, and blue twisted pair
lines in the cables by performing comparative analysis between
corresponding pairs of the red, green, and blue signals.