Rat, some of those later-model c-band receivers had a search feature, it may be in the menu someplace for the 4DTV. It was intended to have the receiver search for a scrambled channel, if the receiver was left on an analog channel for a length of time. That way it could keep your descramblers activated. I have a couple of Gen Instruments boxes that do that, drove me crazy for awhile, until I found it in the menu. I can disable it on these receivers, not sure about the 922 or 920s.