User Manual

106 ISSUED: June 2013 923133 Rev A

maxp population of most populated bin in histogram

mode data value of most populated bin in histogram

pctl data value in histogram for which specified ‘x’% of population is smaller

pks number of peaks in histogram

range difference between highest and lowest data values

sigma standard deviation of the data values in histogram

totp total population in histogram

xapk x-axis position of specified largest peak.

Zoom Traces and Segmented Waveforms

Histograms of zoom traces display all events for the displayed portion of a waveform between the

parameter cursors. When dealing with segmented waveforms, and when a single segment is

selected, the histogram will be recalculated for all events in the displayed portion of this segment

between the parameter cursors. But if All Segments is selected, the histogram for all segments

will be displayed.

Histogram Peaks

Because the shape of histogram distributions is particularly interesting, additional parameter

measurements are available for analyzing these distributions. They are generally centered

around one of several peak value bins, known (with its associated bins) as HistX@peak.

Example

In the next figure, a histogram of the voltage value of a five-volt amplitude square wave is

centered around two peak value bins: 0 V and 5 V. The adjacent bins signify variation due to

noise. The graph of the centered bins shows both as peaks.

Volts