Abstract: The present invention relates to an economical yet effective technique for locating and defeating intentional or unintentional interfering signals transmitted to a commercial communications satellite on a channel-by-channel basis. The satellite arrangement includes a first and a second configuration of hybrids and Variable Power Combiners (VPCs), respectively, that concurrently combine the channels received from a plurality of ground regions for delivery to at least one input multiplexer. In one arrangement, the corresponding channel outputs from the at least one input multiplexer, are each connected to a different input of a separate Single Pole Double Throw (SPDT) switch. Channel switching is accomplished by transmitting commands to the VPCs and SPDT switches from a command earth station. Noting the presence or absence of the interfering signal for a given channel switch and VPC setting will provide the location of the interferer and the elimination of the interfering signal.