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Measurement Definition
Measurement Parameter Definition
if their interval is too long.
Read Burst Pattern
Read Burst Pattern sequence reads the burst pattern and calculate the PES from the
read-back signal. As shown in Figure 5-32, the read back signals from the patterns A and B
are monitored and calculates the PES value. The PES value determines the distance of
compensation using the result of calibration sequence. For example, when the PES is zero,
the read head located at the center of track. When the PES is not zero, the value determines
how far from the center of track by using a PES line. Both the read burst pattern and the
Position compensation sequences are performed by the
hpe5022_executeTrackOffsetComp" function. See the function in the
"
programming manual in detail.
Figure 5-32
Read Burst Pattern Sequence
Position Compensation
A distance of the head drift can be calculated according the PES in the read burst pattern
sequence. The distance is set as the value of the position compensation.
The position compensation shifts the origin of whole data area. The positions of the tracks
Chapter 5
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