If you don't have a Dish satellite receiver in the coach as well as the dome controls then you can't just call anyone and turn on anything. You are also not limited to Dish. You can set the antenna to work with DirecTV as well. There are big differences between how a dome works with each service so you will want to decide what you actually want (HD or not, use a DVR or not, more than one receiver or not) and start there. Ask more questions here before you spend any money.
What I post is my 2 cents and nothing more. Please don't read anything into my post that's not there. If you disagree, that's OK.
Can't we all just get along?