Patent ID: 6700369
Filing Date: 2004-03-02
Classification: G01R,G11B

Abstract:
A testing apparatus of a magnetic recording medium for conducting a test on the magnetic recording medium through recording testing data onto the magnetic recording medium by means of a magnetic head, reproducing the recorded testing data by means of the magnetic head, and performing a predetermined process on the reproduced testing data, wherein:the reproduced testing data is converted into digital data by using a plurality of analog-to-digital converters each provided with a predetermined sampling clock for sampling the reproduced testing data; and a calculation process is performed on the converted digital data in relation to a magnetic characteristic of the magnetic recording medium, thereby conducting the test on the magnetic recording medium, the calculating process calculating at least an amplitude value of each pulse or an average amplitude thereof, which is obtained through reproduction from the magnetic recording medium, or a pulse width at an arbitrary threshold value or an average pulse width thereof.