I think 61.5/72.7 with one D500 has been done iirc and then a separate antenna for 77. It's not an optimal solution. You need a ViP mpeg4 capable receiver with the purple smart card. Wouldn't it be easier to just use a 1000.4 antenna?
Since I don't subscribe to HBO, Showtime, or CD Audio, I don't have a 77 wing dish, but I do have a D500 splitting 61/72. Lower signal than I used to have, but functional.
You need a ViP mpeg4 capable receiver with the purple smart card. Wouldn't it be easier to just use a 1000.4 antenna?