To clear things up. In my last post above I wrote that DTV uses a modulator, it is actually a multiswitch. I should not post tech stuff when tired.
My new dish went from a 3 LBN to a 5 LBN, it is nearly as big a dish as the Hughes Internet dish. I have a second SD receiver for the TV in the living room. If I run a third coax from the dish I would utilize my old SD receiver for my office. I can use that receiver by swapping cables and the DTV card right now, I'm trying to setup so that I would only have to swap the card into the receiver I want to use downstairs
I can only watch one TV at a time
I have no blue cable to the modulator . . . that would be a composite video connection, I'm using component -- yellow, white, red for video and sound. The modulator combines that input into analog video and mono sound over coax, which is fine for that TV.