Tektronix TBS1000C Series

Auto is not same as 0 seconds. Auto is persistence time that gives the most
number of waveforms per second, for a given horizontal scale. The range of
persistence is 1s - 10s in the steps of 1s. There is an option to have
persistence set to 0 seconds. This is mode can be enabled when Persistence is
set to OFF. When persistence is set to ON, there is an option to select the
amount of persistence in terms of time ranging from 1s -10s. Further, the
amount of persistence can be set to Auto, that gives the best performance.
5. To clear the persistence of the displayed waveform, select and click Clear
Persistence. This does not change the persistence setting, but just clears the
displayed waveform persistence data.
Waveform persistence tip
To quickly clear the displayed waveform persistence data, push Single, then push
Run/Stop to restart active waveform acquisition.
NOTE. For FFT waveform, the behavior of the persistence will be as follows.
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Setting the persistence to infinite, will make the display to retain all the
waveforms.
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Setting the persistence to ON (Auto 0 s - 10 s), will have the similar behavior
as Persistence set to OFF.
Waveform display settings
TBS1000C Series Oscilloscopes User Manual 81