Oscilloscope Reference Histograms
Histograms
The instrument can display histograms constructed from t he selected waveform data. You can display both
vertical (voltage) and horizontal (time) histograms, but only one at a time. Use histogram measurements to
get statisti
cal measurement data for a section of a waveform along one axis.
The histogram source can be any channel, math, or reference wav eform.
Turning on histograms starts histogram counting and data accumulation. A sample histogram display is
shown below. Histogram data is continuously accumulated until you explicitly turn off histograms. This
allows you to continue collecting histogram data even when you turn off the histogram display.
In addition to using limit controls to set histogram box boundaries, you can also use standard Windows
drag-and-drop to resize and reposition the histogram box.
Histograms are not available in Zoom modes.
What do you want to do next?
Go to a step-by-step procedure for starting histogram counting. (see page 662)
Go to a step-by-step procedure for taking automatic measurements. (see page 602)
Typical math waveforms
You create math waveforms when you create a math expression. You do so by applying numerical
constants, math operators and functions to operands. You can display and manipulate these derived
math waveforms much like you can the channel and reference waveforms (see UsingMathWaveforms
(see
page
606)).
NOTE. Math calculations are not available on digital channels.
Som
e examples of typical math waveforms follow:
To
normalize this waveform:
Enter this math expression:
(C
h1- Meas1)/ Meas2, where C h1 is the waveform shown
above Meas1 = Low of Ch1 M eas2 = amplitude of Ch1
And get this math waveform:
DSA/DPO70000D, MSO/DPO/DSA70000C, DPO7000C, and MSO/DPO5000 Series 743
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