Satellite & Terrestrial Combiner (4 TV's) This unit can carry 4 satellite signals, for example when using a quad LNB to feed 4 combo receivers and a digital aerial, you can run 4 cables through this combiner, one into each room and then use a smaller single combiner at each receiver to split the satellite & terrestrial signal into the receiver again. This saves the hassle of using a lot of single combiners & splitters.