| 摘要 |
A recording/reproducing method and apparatus having the function of tracking a head on a data track formed on a recording medium of a lower-order specifications and on a data track formed on a recording medium of the upper-order specifications. During calibration, a controller 10 causes a locally maximum value and a locally minimum value of the signal level of a sine wave signal to be sequentially stored as the table information in a storage unit 11, as a magnetic head is moved by a head driving unit 7 in a direction perpendicular to the plural tracks. The sine wave signal is generated by an optical encoder and represents a substantially sinusoidal signal which completes its full cycle on the track basis. During tracking, the locally maximum value and the locally minimum value associated with a targeted track are read out from the storage unit 11 and a target sine wave level information is generated based on the generated locally maximum value and the locally minimum value. The magnetic head is tracked to the targeted track by a lower-order tracking controlling circuit 8a based on the generated target sine wave level information.
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