公开(公告)号：CA1084621A

公开(公告)日：1980-08-26

申请号：CA248378

申请日：1976-03-17

Applicant: BASF AG

Inventor： HACK JOACHIM ,  HIMMELMANN UDO ,  RUDOLF PETER ,  SCHULZE-BERGE KLAUS ,  MEYER KARL-HEINZ

IPC: G11B23/30 ,  G11B5/016 ,  G11B5/455 ,  G11B5/55 ,  G11B5/56 ,  G11B5/58 ,  G11B5/596 ,  G11B21/10 ,  G11B23/36 ,  G11B33/10

Abstract: The invention relates to a magnetic disc for track adjustment and amplitude control having at least one control track with magnetic control signals, this track being arranged in the central region of the recording area, and the control signals consisting of two different signals. The invention also relates to the geometric arrangement of the control signals in the track, their number, their amplitude, their frequency and their duration.