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公开(公告)号：CA1235481A
公开(公告)日：1988-04-19
申请号：CA498311
申请日：1985-12-20
Applicant: IBM
Inventor： BLANCO ALFRED W , MCDOWELL JUDSON A , YEARY DAVID A
Abstract: With high density reel-to-reel tape drives, slight perturbtions in the tape path can cause instantaneous speed variations in the tape which can alter the recording density of data on the tape over a very short interval. This condition can be detected by measuring changes in recording intervals on a plurality of data tracks. Whenever all of the tracks indicate an unacceptable change in the recording interval an unacceptable speed variation has been encountered.
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