From A Vertical Setup Dialog; From A Math Setup Dialog; Parameter Calculations; Parameters And How They Work - LeCroy WaveRunner Xi series Operator's Manual

From a Vertical Setup Dialog

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
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

Parameter Calculations

Parameters and How They Work

D T B
ETERMINING OP AND
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.
WRXi-OM-E Rev C
Close.
L
ASE INES
.
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Figure 1
O ' M
PERATOR S ANUAL
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