KOPFSPURNACHFUEHRUNGSANLAGE.

摘要

A pickup head (13) derives reproduced signals from each of the concentric recording tracks of the magnetic disc (76). A peak detector (33) detects reproduced signals and compares peak valves derived before and after the head is moved. Motion of the head is effected by a drive motor (64) which is pulsed to move the head radially inwardly or outwardly, one step at a time. The peak signal comparison in the detector allows the position corresp. to the max. reproduced RF signal level to be determined by a peak position operating circuit (34), coupled to the peak detector. The signals input to a position memory (35) from the operating circuit (34) represent the deviation between the mechanical centre of the track and the position of the peak detected signal. The memory stores the deviation-representative signals for each of fifty main tracks and a cue track. Signals from the memory are applied for positioning the head to the position of greatest signal when the disc is subsequently replayed.