My father in law just bought a 65" Mitsubishi TV. Not sure of the model number, but it is a true HDTV (not just HD ready). I have the Avia test disc, will it work decent on a HDTV ?? Also, he has Direct TV. Does he need the special reciever to recieve HD signals from Direct TV since his TV is already HD?? Can he just buy the special dish, or does he still need both the dish and reciever?? The picture on Satellite doesn't look the best to me.