Teledyne-lecroy AORM - Advanced Optical Recording Measurements Bedienungsanleitung Seite 81

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AORM Software Package
923133 Rev A ISSUED: June 2013 79
PWID PIT WIDTH
Description
Pit Width provides a measurement of the width of pits or spaces or both. The width of the pit or
space is determined by the crossing of the selected voltage threshold. When pwid is selected as
a parameter measurement it is generally useful to display the measurement calculation for a
single ‘nT’ value. Otherwise the measurement will calculate the average width of 3T pits, 4T pits,
and so on, which is meaningless. However, it is also often desirable to histogram the width of all
pits and/or spaces. In this case the range of ‘nT’ values should be set to include all pit/space
widths of interest.
Display Options
ORM parameter calculations can be displayed, histogrammed, and trended in a variety of ways.
The table provides a concise description of the value or values displayed using each approach.
DISPLAY TYPE VALUE DISPLAYED
Parameter Statistics Off
All values of the pit width for all pits/spaces within the selected ‘nT’
range for the last acquisition.
Parameter Statistics On
Average, minimum, maximum, and sigma of the pit width for all
pits/spaces that are within the selected ‘nT’ range for all acquisitions
since the last C
LEAR SWEEPS operation.
nT Table
List of values of the average pit width for each group of pits/spaces of
common ‘nT’ width for the last acquisition.
Histogram Function
Histogram graph of the value of the pit width for all pits/spaces within
the selected ‘nT’ range for all acquisitions since the last CLEAR
SWEEPS operation.
Trend Function
Trend graph of the value of the pit width for all pits/spaces within the
selected ‘nT’ range for all acquisitions since the last C
LEAR SWEEPS
operation.
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