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Logic Analyzer Reference
The Waveform Menu
The Waveform Menu

sec/Div field

When acquisition control is set to automatic, the sec/Div field affects
the sample period. Timing waveforms are reconstructed relative to the
sample period. A shorter sample period puts more sample points on the
waveform for a more accurate reconstruction but also fills memory
more quickly.
If the sec/Div is changed resulting in a change in the next sample
period, you must run the analyzer again before the current sample
period display is updated. The sample period is shown in the second
row from the top when the markers are turned off.

Accumulate field

The Accumulate field controls whether old data is cleared or displayed
along with new data. The Accumulate field will toggle On/Off. When
Accumulate is on, the analyzer displays the data from a current
acquisition on top of the previously acquired data. When Accumulate is
off, the display is cleared before each new run cycle.
If you leave the Waveform menu, or pop up a menu over the waveform
display, any accumulated display data is lost and the accumulation
process starts over.