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1.发明公开Detection of instantaneous speed variations in a tape drive. 失效Aufspürenvon schnellenGeschwindigkeitsänderungenbei einem Bandantrieb。
公开(公告)号：EP0206766A1
公开(公告)日：1986-12-30
申请号：EP86304717
申请日：1986-06-19
Applicant: IBM
Inventor： BLANCO ALFRED WARREN , MCDOWELL JUDSON ALLEN , YEARY DAVID ANGELUS
CPC classification number: G11B20/10
Abstract: Apparatus and method for detecting short-term speed variations in a reel-to-reel tape drive for use with digital data, comprising counters (132) for generating time windows representing equal numbers of data bits read from the tape, further counters (135) for counting up during one window and down during the next, comparators (136, 137) for comparing the residual count of the up/down counters with preset limits and an error indicator (138, 134) for indicating the condition when the residual count exceeds the permitted bounds. The invention may be practised over a plurality of data tracks, in which case the apparatus includes means (139, 140) for indicating an overall error when an error has been detected on all tracks.
Abstract translation: 用于检测用于数字数据的卷对卷带驱动器中的短期速度变化的装置和方法，包括用于生成表示从带读取的相等数量的数据位的时间窗口的计数器（132），其他计数器（135） 用于在下一个窗口期间向上计数，用于将上/下计数器的剩余计数与预设限值进行比较的比较器（136,137）和用于指示当剩余计数超过的条件的错误指示符（138,134） 允许范围。 本发明可以在多个数据轨道上实施，在这种情况下，该装置包括用于在所有轨道上检测到错误时指示总体错误的装置（139,140）。
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公开(公告)号：DE3669801D1
公开(公告)日：1990-04-26
申请号：DE3669801
申请日：1986-06-19
Applicant: IBM
Inventor： BLANCO ALFRED WARREN , MCDOWELL JUDSON ALLEN , YEARY DAVID ANGELUS
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