Dynamic information storage or retrieval – Condition indicating – monitoring – or testing – Including radiation storage or retrieval
Patent
1991-02-27
1993-04-27
Young, W. R.
Dynamic information storage or retrieval
Condition indicating, monitoring, or testing
Including radiation storage or retrieval
360 31, 360 45, 369116, 369124, G11B 700
Patent
active
052068536
ABSTRACT:
An apparatus for detecting an intersymbol interference occurred in a digital signal during signal transmission includes a test pattern generator, which would produce the largest intersymbol interference on a recording medium and reading the test pattern therefrom. The apparatus further includes a measuring circuit for measuring short transition intervals representing one bit pattern and producing a reproduction signal, and a rectangular signal with, reference to a predetermined threshold. The apparatus includes a calculating circuit for calculating the total intersymbol interference by a bit length and measured transition intervals. Furthermore, the apparatus detects the total intersymbol interference by measuring long transition intervals representing four series of bit patterns and the short transition intervals.
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Matsushita Electric - Industrial Co., Ltd.
Young W. R.
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