Teledyne LeCroy AORM - Advanced Optical Recording Measurements - Manual (Page 43)

AORM Software Package
923133 Rev A ISSUED: June 2013
41
The measurement has configurable units. If absolute time is specified, the value is simply the time as
indicated above. If percent is specified, the value of the measurement is the time normalized to the
clock period:
For all pits, a valid measurement will be obtained only when both pit/space edges can be determined
(that is, there is a hysteresis-qualified threshold crossing beginning and ending the pit/space pair of
interest between the parameter cursors)
, and there is a clock edge of both polarities surrounding the
ending pit or space edge between the parameter cursors.
Display Options
ORM parameter calculations can be displayed, histogrammed, and trended in a variety of ways.
DISPLAY TYPE VALUE DISPLAYED
Parameter Statistics Off
All values of the average time between ending edge of the subject
n
pit (space) and nearest clock edges for all subject pits (spaces)
followed by the spaces (pits) within the selected ‘nT’ range for the
last acquisition.
Parameter Statistics On
Average, minimum, maximum, and sigma of the ending edge shift
calculated for all identified pits/spaces pairs within the selected
‘nT’ range for all acquisitions since the last C
LEAR S WEEPS
operation.
nT Table
List of values of the average ending edge shift for each ‘nT’ space
(pit) within the selected range following the subject pit (space) for
the last acquisition.
Histogram Function
Histogram graph of the value of the ending edge shift calculated
for all pit/space pairs within the selected ‘nT’ range for all
acquisitions since the last C
LEAR S WEEPS operation.
Trend Function
Trend graph of the value of the ending edge shift calculated for all
pit/space pairs within the selected ‘nT’ range for all acquisitions
since the last C
LEAR S WEEPS operation.
∆
∆
ees t
T
or t
T
100%
100%
= ⋅
⋅
+
−