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Peak Hold

When Peak Hold is used, the analyzer will display a secondary trace showing the highest amplitude values for each frequency bin.  Selecting Fast, Medium or Slow will cause the peak hold values to temporarily hold before resetting.  Forever will hold the values without releasing them.  Stopping and restarting the processor will reset the peak hold values. 

Peak Hold can be controlled from either the Spectrum Plot Options dialog box or from the spectrum plot toolbar.

See also:  Averaging Settings