System for automatically adjusting parameters of a digital signa

Details System for automatically adjusting parameters of a digital signa System for automatically adjusting parameters of a digital signa

1993-03-18

1995-04-11

Psitos, Aristotelis

Dynamic magnetic information storage or retrieval

General recording or reproducing

Specifics of equalizing

360 32, G11B 535, G11B 500, G11B 509

Patent

active

054064295

ABSTRACT:
In a digital signal reproducing apparatus various adjustment jobs and measurement jobs can be automatically executed by a simple operation by providing a clock generator, an external waveform equalizer, an error detector, an edge detection circuit, and a DC following circuit in addition to a waveform equalizer by which a reproduced analog signal waveform is processed and then converted to a digital signal. The digital signal is equalized by a digital filter and sampled and the digital signal and extracted clocks are supplied. The reproducing level and the equalizer coefficients can be automatically adjusted and an error rate can be automatically measured. A pulse width modulation or bias recording can be automatically determined and a recording current can be automatically adjusted by the system and the inclination of magnetic heads and the distance between the heads can also be automatically measured.

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patent: 4928287 (1990-05-01), Tanaka
patent: 5065413 (1991-11-01), Fukuda
patent: 5101309 (1992-03-01), Mitsuhashi

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