Ah, ok if you have a dual tuner, you need a satellite splitter
Like this . The feed from the satellite dish goes into the one end, and the other two ends go into each of the tuners.
The remote you should be using is the Dish remote. You use the TV remote to change volume, and set the appropriate input.
Unfortunately, I don't have a Dish receiver, so you'lll need to refer to the
users manual and guides.