Infinite Persistence - Keysight U1610A Guia Del Usuario

Using the Oscilloscope 3

Infinite persistence

Toggle to enable infinite persistence, which updates the display with
new acquisitions, but does not erase the results of previous acquisitions. This can
be used to measure noise and jitter, observe the worst case of a varying
waveform, look for timing violations, and capture events that occur irregularly.
To erase previous acquisitions, press . The display will start to
accumulate acquisitions again if the oscilloscope is running. Turn off ,
then press to return to the normal display mode.
Keysight U1610/20A User's Guide 67