I have a coaxial cable runing from wall to a amp. splitter and then to tivo HD. Picture is a mess.A bar down the middle and it also has ghosts. The thing is if i plug in the same coaxial cable in to S3 tivo box the picture is great.No cable cards in boxs.ON the Tivo HD The pictures are bad on CBS,NBC,ABC.All other channels are good.Can any one tell me any thing??