I plan on upgrading my Dish Network to HD very soon but it appears that the ViP622 receiver can only provide an HD signal to one TV. Is it possible to split the HD signal so a second TV can get HD? The reason why I ask is because I plan on getting a new TV for my bedroom very soon and if I can only get my main TV to receive HD then I'll only get a new set that is capable of 480i. Thanks in advance.