Hi, As this Motrola HDTV receiver can downconvert HD channels and output video as SD on its S-video output, can TIVO change HD channels (3.1 etc) on this box via IR. I can receive OTA HD channels with an indoor antenna but cannot recieve normal channels!! (don't want to install outdoor antenna). So I was thinking of disconnecting comcast cable and using this setup for recording local channles on Tivo. Thanks.