User manual

Part 6: IEEE 488.2 Command Reference
DD_PES_SUMMARY_DATA?, DPSD?
Description
Summarizes PES Analysis results. Returns average and sigma (Runout Standard Deviation) of all wedge
RROs (Repetitive Runouts), as well as the average of sigma for each wedge’s RRO.
Note: IRO = instantaneous run out, from one observation of the PES signal; RRO = repeatable run
out, the average of multiple IRO values at the same position.
Query Syntax
DD_PES_SUMMARY_DATA?
Response Format
DD_PES_SUMMARY_DATA? <avgRO>,<sigmaRO>,<avgSigma>
<avgRO> : = Average of all wedges’ RROs
<sigmaRO> : = Sigma of all wedges’ RROs in % of track separation
<avgSigma> : = Average sigma of all wedges' RROs
<avgRO> is the average distance of the head from the track, as a percentage of track separation.
<sigmaRO> Reflects the width of the distribution of all RRO values from all wedges. If the track is circular
and the head still, this should be zero.
<avgSigma> reflects the width of the distribution of IRO values that contributed to that wedge’s RRO.
This value, also given as a percentage of track separation, is increased by non-repeatable runout.
Related Commands
DD_PES_ANALYSIS, DD_PES_DATA, DD_PES_SETUP
6-183