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Measurement Definition
Measurement Parameter Definition
center are shifted by this compensation as shown in Figure 5-33.
For example, when the position compensation is set at +2µm, the track center is shifted by
+2µm. This means that the origin of all tracks was shifted.
When the position compensation is set, the travel range of track offset is also changed.
Normally the piezo travel range is -6µm to +6µm. If position compensation value
(hpe5022_trackOffsetCompVaule) is set at +2µm, the offset range will be -6µm to +4µm.
The maximum offset range is ±6µm.
The value of the position compensation is reset at 0 when the calibration sequence is
executed.
Both the read burst pattern and the position compensation sequences are performed by the
"hpe5022_executeTrackOffsetComp" function. See the programming manual in detail.
Figure 5-33
Track Offset Compensation
Sample Track Offset Compensation Sequence Flow
Although the track offset compensation function is effective for all of measurements, the
track profile, the micro track profile and the bit error rate measurements and erase&write
menu has this capability in the VEE measurement program.
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Chapter 5
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