I would like to install the directv dish with a single receiver. I have a used oval dish with the three LNB's and need to install it only to hook up to one receiver. Do I need a switcher or can I hook the cable directly up to the receiver from the dish. By the way, if this is possible, what cable or LNB do I need to connect to the receiver. I do not need HD, but only the basic programming and local channels. Any help or a point in the right direction would be greatly appreciated.