Appeal No. 96-3901
Application 08/192,638
DECISION ON APPEAL
This is a decision on appeal from the final rejec-
tion of claims 1 through 15, all of the claims pending in the
present application.
The invention relates to a method of measuring the
read-to-write offset by incrementally measuring the amplitude
of a test pattern across the width of a track.
The independent claim 1 is reproduced as fol-
lows:
1. In a disc drive system having a transducer with
a read element that reads information from a track to produce
a read signal and a write element that writes information to
the track, a method of measuring a radial read-to-write offset
between the read and write elements at a track on a disc
surface of a disc in the disc drive system comprising:
writing a test signal to the track at a predeter-
mined actuator offset;
incrementally moving the read element across a width
of the track to measure a maximum amplitude in the read sig-
nal;
incrementally moving the read element across the
width of the track to find first and second actuator offsets
2
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