Method and apparatus for using synthesized analog data for testi

Details Method and apparatus for using synthesized analog data for testi Method and apparatus for using synthesized analog data for testi

1990-08-22

1992-03-10

Pellinen, A. D.

Coded data generation or conversion

Converter calibration or testing

360 27, G11B 502

Patent

active

050953109

ABSTRACT:
The system of the present invention makes use of a data synthesizer to produce a synthesized analog data signal representative of a special encoded binary waveform to perform a test on both the magneto resistive element as well as the associated read path electronics independent of operator intervention. The special encoded binary waveform is coupled to the magneto resistive element to produce an approximation of the typical read back signal that is read by the magneto resistive element from a test magnetic tape. The analog signal output by the magneto resistive element is applied to the read back electronics, where it is converted in well known fashion to a digital data signal indicative of the synthesizer block of data that is applied to the magneto resistive element. The output of the read path electronics is applied to a special pattern detector, a sync pattern detector and a test pattern detector which function to detect anomalies in the digital data that is output by the read path electronics.

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patent: 4947168 (1990-08-01), Myers

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