FM broadcast receiver for receiving multiplexed character data

摘要

An FM broadcasting signal carrying multiplex character data transmitted from a radio broadcasting station is automatically preset in an FM receiving apparatus. An FM broadcasting signal is received, and a frequency information of the received FM broadcasting signal is temporarily memorized in a memory (20). It is judged whether a PLL lock signal is produced by a clock signal reproducing circuit (24) during a demodulation process of the FM broadcasting signal whose frequency information is memorized in the memory (20). When it is determined that the PLL lock signal is produced by the clock signal reproducing circuit (24), it is determined that the FM broadcasting signal carries multiplex character data, and the frequency information of said FM broadcasting signal is preset to the FM receiving apparatus. <IMAGE>