Yes either will work, there is a lot of confusion with dish equipment as the newer oem remote's from dish do not send any ir, however the receivers will respond just fine. Either you can download a file from here or can can learn the ir from the dish receiver (you go into to a menu using the dish remote and point your mx-800/850 at the dish box to learn the codes, I seem to remember reading you have to be 1-2 feet away for this to work right, try searching for more info) of course you will need the mrf200/250 base station to work behind the closet door.