Dynamic information storage or retrieval – Condition indicating – monitoring – or testing – Including radiation storage or retrieval
Reexamination Certificate
2003-10-30
2009-12-01
Tran, Thang V (Department: 2627)
Dynamic information storage or retrieval
Condition indicating, monitoring, or testing
Including radiation storage or retrieval
C369S044320
Reexamination Certificate
active
07626906
ABSTRACT:
An offset adjustment signal is recorded in a test recording area provided on the inner side of a disc while modifying the level of a driving signal for offset detection that is supplied to a tilt adjustment coil. Thereafter, an operation to play back the offset adjustment signal is performed, and the peak level of an RF signal that is played back is detected. When a signal is recorded for which the detected peak level reaches a maximum, the level of the driving signal supplied to the tilt adjustment coil is set as an offset value. Tilt control is then performed by adding the offset value to a tilt signal for performing tilt control.
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Hiroshima Toshihiko
Yamamoto Tsuyoshi
Alunkal Thomas D
Hogan & Hartson LLP
Sanyo Electric Co,. Ltd.
Tran Thang V
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