DirecTV satellites call for the use of a multiswitch to install additional receivers on a single Dual-LNB, or to use the features of a DVR (TIVO). You must have two satellite feeds for each DVR (digital video recorder), since they have dual tuners that require this to function. Multiswitches are further involved when you want to connect several receivers to a multiple DirecTV dish or even multiple dishes.

How to Install a Multiswitch for DirecTV - 88