I have a DTV H21 receiver that I would like to use in more than one room. First of all is the H21 RF ready (built-in), but just don't have the RF antenna like the H20? I know that the previous version H20 is IR/RF capable, but I don't have one of those receivers YET. Is there a way in which I can get my H21 receiver RF capable to use in my second room? Is there a directv recommended or aftermarket RF unit that I can add on and use for my purpose?