Agilent Technologies E5022A Operation Manual page 296

Hard disk read/write test system
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TrackConfig) at the squeeze position on each side of the test track.
11. Measure TAA (or Narrow Band TAA) at the same point where the maximum TAA was
previously measured. Calculate squash as the ratio of the TAA squash and TAAmax.
The remaining TAA signal is measured as percentage of the original track amplitude
referred to as squash. Squash allows you to measure the effect on track profile
amplitude when an adjacent erased signal is written close to the test track.
Figure 5-48
Calculation of Squash
12. Write the data track on both sides of the previously written test track as specified by
[OTRC Write Position]. [OTRC Write Position] is written at a distance from the test
track relative to the write width ratio (%).
13. Write the adjacent track data pattern (specified by hpe5022_tripleTrack AdjacentTrack
Config) at the center of the track. Since it is written at the track center of the previously
written test track, it simply overwrites the previous signal.
Chapter 5
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Measurement Definition
Parametric Sweep Measurement Definitions
295

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