Teledyne LeCroy WaveRunner XI SERIES Operator’s Manual - Manual (Page 109)

O
PERATOR
’
S
M
ANUAL
From a Vertical Setup Dialog
WRXi-OM-E Rev C
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1. In the Cx Vertical Adjust dialog, touch the Measure button .
eter from the pop-up menu. (The Actions for trace source defaults to the channel or trace 2. Select a param
whose dialog is open. If a parameter, it goes into the next "available" parameter, or the last one if all are
used.)
3. Select another parameter or touch Close.
From a Math Setup Dialog
1. In the Fx dialog, touch the Measure button .
2. Select a parameter from the pop-up menu. (The Actions for trace source defaults to the channel or trace
Close.
Parameter Calculations
Parameters and How They Work
D ETERMINING T OP AND B ASE L INES
Proper determination of the top and base reference lines is fundamental for ensuring correct parameter
calculations. The analysis begins by computing a histogram of the waveform data over the time interval spanned
by the left and right time cursors. For example, the histogram of a waveform transitioning in two states will contain
two peaks (see Figure 1). The analysis will attempt to identify the two clusters that contain the largest data
density. Then the most probable state (centroids) associated with these two clusters will be computed to
determine the top and base reference levels: the top line corresponds to the top and the base line to the bottom
centroid.
whose dialog is open. If a parameter, it goes into the next "available" parameter, or the last one if all are
used.)
3. Select another parameter or touch
Figure 1