after a newly selected broadcasting is received in step 23 the seek is finished step 24 when the seek returns to the original frequency in step 25 this means that there is no new broadcasting to switch to and it returns to the originally received broadcasting step 27 and the seek operation is finished upon a user 39 s operation for starting a scanning the microcomputer 3 controls the tuner 1 to start such a scanning step 30 sets the tuner 1 at a predetermined frequency enters its field strength signal from the a d converter 4 and judges whether the field strength of the broadcasting is above a predetermined value or not step 31 when the field strength is above the level the pi code pi of the presently received broadcasting program is compared to the pi code pi 39 of the newly selected broadcasting program step 32 when pi and pi 39 are not identical the newly selected broadcasting is received for a predetermined time step 33 when pi and pi 39 are identical the microcomputer 3 controls the rds decoder 2 to not receive the newly selected broadcasting and jump step 33 to check whether it has returned to the.