To detach a CATV community line from a CATV system when the line is cut so as to individually execute the reception operation by switching a signal transmission line to its own antenna when the absence of a carrier is detected and variably controlling a local oscillation frequency in accordance with a station selection operation for receiving general broadcasting.

When the absence of the carrier of a notice broadcasting signal is detected, it is considered that the line fault such as disconnection occurs in the CATV community line L. The signal transmission line is switched to the internal antenna 5 and the local oscillation frequency is varied for receiving general broadcasting. When the CATV community line L is disconnected, a carrier detection circuit 2 cannot detect the carrier and generates a display control signal Sd corresponding to it and a selector control signal Sc. A selector driver 3 instructs that a selector SEL1 selects the internal antenna 5 and instructs that a selector SEL2 selects a variable frequency oscillation circuit 7-side.