I have a house with 5 unlabeled runs of coax to a centre point.  One run moves the sky satellite from room A to room B.  I want to split this signal and send it to room C so I will split it but with 8 other wires testing by moving a decoder round is a pain in the butt.  Am I right in thinking, if I place one of these Satellite Finders on the end of the signal in the bedroom it will tell me the sattelite signal is running through this wire now??

The device -> Satellite Finder

Cheers