A monitoring apparatus for monitoring a coaxial cable for control signal collisions comprises an input port configured to couple the monitoring apparatus to the coaxial cable for detecting control signals that are transmitted on the coaxial cable, and a data interface configured to couple the monitoring apparatus to a data network and configured to output the detected control signals. Further, an electronic device for receiving satellite signals via a coaxial cable comprises a signal interface configured to couple the electronic device to the coaxial cable, a data interface configured to couple the electronic device to a monitoring apparatus, and a device control unit configured to transmit control signals via the signal interface on the coaxial cable and to query the monitoring apparatus via the data interface for presence of respective control signals on the coaxial cable. In addition, a single cable satellite system and a monitoring method are also provided.