A set of electronic circuitry used to insure that the video output signal of a switcher (or other video equipment) maintains proper levels and relationships and that sync and burst are clean and useable. The AVC series switcher comes with a limited proc amp as a standard feature. This proc amp can pass the video signal as it appears at the input, or strip the old sync and add a new sync pulse. It can also strip both sync and burst and add new sync and burst prior to the output of the switcher.