User`s guide

5 Displaying
182 InfiniiVision Oscilloscopes User’s Guide
Infinite Persistence
With infinite persistence, the oscilloscope updates the display with new acquisitions, but
does not erase the results of previous acquisitions. All previous acquisitions are
displayed in gray with reduced intensity. New acquisitions are shown in their normal
color with normal intensity. Waveform persistence is kept only for the current display
area; you cannot pan and zoom the infinite persistence display.
Use infinite persistence to measure noise and jitter, to see the worst-case extremes of
varying waveforms, to look for timing violations, or to capture events that occur
infrequently.
To use infinite persistence to display multiple repetitive events
1 Connect a signal to the oscilloscope.
2 Press the [Display] key.
3 Press  Persist to turn on infinite persistence. The display will begin accumulating
multiple acquisitions.
4 Press the Clear Display softkey to erase previous acquisitions. The oscilloscope will
start to accumulate acquisitions again.
5 Turn off infinite persistence, then press the Clear Display softkey to return the
oscilloscope to the normal display mode.
See also “Glitch or Narrow Pulse Capture” on page 112.
Accumulating multiple acquisitions
Turning off infinite persistence does not clear the display. This allows you to accumulate multiple
acquisitions, stop acquisitions, and then compare future acquisitions to the stored waveforms.
The display is cleared if you press the Clear Display softkey or if you press the [AutoScale] key.