Teledyne LeCroy AORM - Advanced Optical Recording Measurements - Manual (Page 58)

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ISSUED: June 2013 923133 Rev A
PAA PIT AVERAGE AMPLITUDE
Description
Pit Average Amplitude provides a measurement of the average amplitude of pits and spaces. The
calculation is performed by calculating the difference between the average value of the base
(pbase) for spaces of a particular ‘nT’ width and the average value of the top (ptop) of pits of the
same ‘nT’ width. For example, the average value of the base for all 3T spaces is subtracted from
the average value of the top for all 3T pits to obtain the 3T pit average amplitude. If a range of
‘nT’ values is selected and is displayed as a parameter, the measurement provides the weighted
average amplitude based on the number of occurrences of each ‘nT’ pit/space width.
Display Options
ORM parameter calculations can be displayed, histogrammed, and trended in a variety of ways.
DISPLAY TYPE VALUE DISPLAYED
Parameter Statistics Off
Single value of the average amplitude for all pits/spaces of interest for
last acquisition.
Parameter Statistics On
Overall average, minimum, maximum, and sigma of the single
average amplitude value calculated per acquisition for all acquisitions
since the last C
LEAR S WEEPS operation.
nT Table
List of the average amplitude values for each group of pits/spaces of
common ‘nT’ width for the last acquisition.
Histogram Function
Histogram of the single average amplitude value calculated for each
acquisition for all acquisitions since the last C
LEAR S WEEPS operation.
Trend Function
Trend of the single average amplitude value calculated for each
acquisition for all acquisitions since the last C
LEAR S WEEPS operation.