I am an obvious newbie and have done some reading here about backfeeding and watching multiple receivers on tv's. I had a 522 and a 322 installed. I would like to be able to change the channel on our main tv and get either the tv1 from the 522, tv2 from the 522 or the tv2 from the 322. I know that I need to use diplexers but I am not sure how I would do that. Currently the cabling in not intermingled meaning that the cables from each output only goes to the individual tv's. Any help would be greatly appreciated. Thanks.