Method and apparatus for locating the edge of a magnetic tape

Details Method and apparatus for locating the edge of a magnetic tape Method and apparatus for locating the edge of a magnetic tape

G - Physics

11

B

352/21.3, 352/20

G11B 5/58 (2006.01) G11B 5/55 (2006.01) G11B 5/584 (2006.01) G11B 15/02 (2006.01) G11B 27/26 (2006.01)

Patent

CA 1303731

41903 CAN 2A ABSTRACT A method and apparatus for magnetically detecting the edge of a magnetic recording tape to enable accurate positioning of a transversely movable recording/playback unit (20) at any of a plurality of track locations across the width of the tape. The gain (54) of a playback amplifier (52) is first dynamically adjusted in response to a played back periodic test signal based on the number of flux transitions (56) detected during playback of a given length of tape, and an edge of tape reference position (40, 42) thereafter established by comparing the number of flux transitions detected during the playback of a periodic test signal recorded along the edge of a given length of tape when the recording/playback unit is successively stepped toward the edge of the tape.

550072

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