The Xantech stuff I'm using is the most basic, and it is not directly compatible with the IR input jack on the back of my 990 or my cable box. Both need a 794-10 interface module. Since the interface module costs as much or more than my connecting block, sensor, and emitters combined, I just stuck an emitter on the inside of the cabinet door directly across from the 990's sensor (lazy and cheap, but extremely effective).