Determining gamma of a read/write head based on active gain control and test signal amplitude measurements
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United States of America Patent
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Nov 14, 2017
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N/A
app pub date -
Mar 18, 2016
filing date -
Mar 18, 2016
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Abstract
A change in servo active gain control values is determined from a beginning of a writing of a test region of a recording medium to an end of the writing of the test region. The servo active gain control values are read from servo marks by a read transducer of a read/write head during the writing. After writing of the test region, the test region is read by the read transducer to determine a change in recorded amplitude from the beginning of the writing to the end of the writing. A gamma value of the read/write head is determined based on the change in servo active gain control values and the change in recorded amplitude.
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