Dynamic magnetic information storage or retrieval – General recording or reproducing – Specifics of equalizing
Patent
1988-10-03
1990-01-02
Canney, Vincent P.
Dynamic magnetic information storage or retrieval
General recording or reproducing
Specifics of equalizing
G11B 1514
Patent
active
048917192
ABSTRACT:
Disclosed is a fast closure method for use in the calibration of a data signal channel, such as the record/reproduce channel of a magnetic tape recorder. The method results in fewer iterations of a calibration procedure which reduces the difference between a measured channel response and a target channel response to bring the channel response within acceptable response limits. According to the method, the control value is originally set at mid range and the channel response measured. If the channel response is too low, the control value is set at 75%, and if the response is too high, the control value is set at 25%. The channel response is measured again and from the last two measured channel responses a transfer slope is calculated. A projected control value is determined from this slope based on the desired response of the channel.
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Canney Vincent P.
Datatape Incorporated
Noval William F.
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