I am using the High Def output from a RCA DTC-100 into an Audio Authority VGA to Component switcher into a Sony Grand Vega and on the High DEF channels the picture on the upper portion of the screen begins to jump around and is very shaky. The picture on the regular def channels are fine though there is a black bar that goes from bottom to top on the right side of the picture. I used the centering from the DTC-100 but I still have this problem.