2 months ago my service (Dish Network) was installed. I have a DVR 625 dual receiver in my upstairs bedroom connected to a tv. The second TV is downstairs in my rec room. Unfortunately to access the receiver from downstairs I have to strain myself with the remote. This is hoping that I can get the antennae right with the remote. On the back of the receiver is an antennae on a cable roughly 3 feet long. Is it possible to make the cord longer by just buying another cable. OR is there an another method I can use to allow me to change channels from downstairs. The distance between the receiver and downstairs tv area is about 20 feet. Other then going thru the floor boards, there's 3 walls. Any suggestions?