The feed comes in from the dish to a standard outlet, and when they're watching in that room their decoder goes on the end of it and bang job done. When they're in the other room, they take the coax cable from the sky outlet, screw it in to the end of another piece of coax that is sticking out of a hole in the floor, that then loops under the house to another wall mounted outlet in the other room, which they then connect their decoder to.
With me? Phew!
What WE are wanting to do, is take that feed where it comes out of the first outlet, put a splitter on it with two outputs, and connect one to our MySky HDi box and the other to the cable sticking out of the floor so that the other decoder can continue to receive a signal in the other room.
Will this work?