PURPOSE: To call a broadcast station with all preset keys by rearranging a receiving frequency to be selected according to the order of strong electric field intensity and holding a frequency before an auto-memory start to the remained preset key when the receiving frequency to be auto-memorized is small.

CONSTITUTION: When a frequency H is received, the electric field intensity is measured. When this electric field intensity is '1', since it is secondly strong one, the frequency H is received to a memory NO2 and a receiving counter goes to be 2. Next, when a frequency I is received, the electric field intensity is measured. Then, when this electric field intensity is '3', since this is the maximum value out of the electric field intensity of the other memory NO, frequencies G and H are respectively shifted in memories NO 2 and 3. Since this shift is executed in the range of the receiving counter, frequencies D∼F received in advance are not shifted and the receiving counter goes to be '3'. Such a processing is repeated until the receiving counter goes to be '6'. Thus, the broadcast station can be called by all the preset keys.