Write power calibration utilizing least squares fit of read-back

Details Write power calibration utilizing least squares fit of read-back Write power calibration utilizing least squares fit of read-back

1991-10-18

1993-12-07

Dzierzynski, Paul M.

Dynamic information storage or retrieval

Specific detail of information handling portion of system

Radiation beam modification of or by storage medium

369 54, 369 56, 369 48, G11B 700

Patent

active

052688933

ABSTRACT:
Calibration of the write signal power level applied to a transducer for marking a moving media to optimize a later recovered read-back signal is provided. An optimized read-back signal is one where the peak-to-peak amplitude of the read-back signal is maximized. The method provides marking test patterns on the recording media at a plurality of discrete, selected write signal power levels of the marking source, developing a read-back signal from the test pattern marks, correlating portions of the read-back signal with the write signal power levels and solving a relationship of the form

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patent: 5134606 (1992-07-01), Sekiguchi et al.

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