I am getting ready to do a install at a home and one thing I may need is a harmony rf/ir remote on multiple a/v set ups in different rooms of the house. Does that mean every remote will be relayed to all of the set ups causing possible mis commands. Or is there a channel for the rf portion. Like if the family room had a sony dvd player and the basement had a sony dvd player, would pressing play for the one in the family room cause the one in the basement to do the same thing?

Thanks!