I'm having problems with my Asus TV Tuner card when used in conjunction with an RF Modulated source. There is a vertical band of interference in the picture. If I switch to the antenna, I don't see any problems with the picture at all. Also, if I hook up a TV to the RF modulated output, I don't see the interference band. It only seems to happen when the RF modulated source is being displayed by the TV Tuner Card. Anyone have any ideas as to what might be causing this?