Ok so from what I am reading I cannot get high def with my present Dish 500 system I need to get a different dish on my roof. So in order to get my second tv set hooked to Dishnetwork I either need to get a single set receiver and use the second feed off my Dish 500 on the roof for the other...

I have a dual LNB Dish 500 system on my roof. I presently have an older dish 4900 receiver that is being replaced by Dish with a HDTV capable one I am told. The old 4900 will not bring in all the cannels I purchased for some reason. Ok my question is I have had the second feed from my dish...