Method and circuit arrangements for detecting and evaluating fau

Details Method and circuit arrangements for detecting and evaluating fau Method and circuit arrangements for detecting and evaluating fau

1983-10-11

1987-04-07

Karlsen, Ernest F.

Electricity: measuring and testing

Magnetic

Magnetic information storage element testing

360 31, G01R 3312, G11B 2736

Patent

active

046564209

ABSTRACT:
A method and circuit arrangements for detecting and evaluating dropouts or drop-ins on recording media, comprising reading and modifying the recorded digital signals, the size and type of fault being evaluated on the basis of fixed threshold levels. In the case of a dropout, for example, the fault is weighted by determining the differential of the envelope of the read signal. In the case of a drop-in, other noise signals are left out of consideration by nonlinear emphasis of the drop-in and appropriate choice of the threshold value. A circuit combination enables both dropouts and drop-ins to be detected and evaluated.

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