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MegaZoom Concepts and Oscilloscope Operation
To use infinite persistence
To use infinite persistence
With infinite persistence, the oscilloscope updates the display with new
acquisitions, but does not erase the results of previous acquisitions. Rather than
being erased by subsequent acquisitions, the previous acquisition is displayed
in minimum intensity. Thus, the results of all previous acquisitions are displayed
in minimum intensity, with the latest acquisition in normal intensity.
Infinite persistence is useful in a number of applications, including:
• Display the worst-case extremes of varying waveforms.
• Capture and store waveforms.
• Measure noise and jitter.
• Capture events that occur infrequently.
To use infinite persistence to store multiple repetitive
events
1 Connect a signal to the oscilloscope.
2Press the
Display key, then press Persist to turn on infinite persistence.
The display will begin accumulating multiple acquisitions. Previous acquisitions
will be displayed in minimum intensity.
3Press the Clear Display softkey to erase previous acquisitions.
The oscilloscope will again start to accumulate acquisitions.
4 Turn off infinite persistence, then press the Clear Display key to return
the oscilloscope to the normal display mode.
Clearing stored infinite persistence waveforms
In addition to clearing the display by pressing the Clear Display softkey, the display
is also cleared of previous acquisitions any time you make a setting that will change
the display, including changing sweep speed, volts/division, delay time, or channel
position controls.
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