Nonlinearity measuring method, nonlinearity measuring unit,...

Details Nonlinearity measuring method, nonlinearity measuring unit,... Nonlinearity measuring method, nonlinearity measuring unit,...

2007-07-24

2007-07-24

Wellington, Andrea (Department: 2627)

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C360S053000

Reexamination Certificate

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11120114

ABSTRACT:
A nonlinearity measuring method capable of measuring NLTS with a higher precision while taking the state of magnetization inversion of a preceding bit string into consideration. A constitution includes a first measuring section measuring a first predetermined higher harmonic component from a regenerated signal of the reference signal magnetically recorded on a medium, a second measuring section measuring a second predetermined higher harmonic component from regenerated signals with respect to plural kinds of signals to be measured magnetically recorded on the medium, and a calculating section calculating NLTS from the first component and the second component corresponding to each of the signals, wherein each of plural kinds of signals to be measured includes a magnetization inversion pattern string P1preceding the objective bit to be measured of NLTS; thereby NLTS depending on the string P1can be quantitatively measured easily.

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