Re: 1 satellite dish 2 set top boxes two tv seperate programs question
I would advise you change the LNB (thing the wire goes into at end of dish) with a twin LNB or quad LNB (2 and 4 outputs respectively).
Using a splitter won't work too well. A LNB has 4 states - Horizontal High, Horizontal Low, Vertical High and Vertical low. It can only be in one state at any one time. So, if one box is showing a channel on Horizontal Hi for example, the other box would need to watch a channel that is Horizontal High also. And of course there's signal loss to consider, though it may not be much.
So, in summary, for best results and least hassle, change the LNB, preferably for the Quad LNB, in case you ever intend upgrading to further receivers or PVR receiver.