User`s guide

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Using the Oscilloscope
The Scope Display Menu
If you start repetitive run, the oscilloscope acquires and displays data,
averaging each run with the preceding set accumulated since you
selected repetitive run. When the oscilloscope has acquired the
number of waveforms you selected, it displays the advisory message
"Number of averages has been met." All new data is weighed at 1/N and
is averaged with the previous data. All data is retained.
If you set the Run mode to Single, acquisitions are not made until you
initiate a Run. If Average # is set to 16, as in the previous example, the
"Number of averages has been met" message will not be displayed until
you have selected the Run field 16 times.
If you bring a waveform that is being averaged in the oscilloscope into
the waveform display of another time correlated module, such as the
timing analyzer, the waveform will not continue to average. Only the
most recent acquisition, not the average trace data, will appear on the
screen. To view an averaged mode trace with other time correlated
waveforms, bring those other waveforms into the display of the channel
that is setup for average mode.
Accumulate mode
In Accumulate mode, the oscilloscope accumulates all waveform
acquisitions and displays them on the screen without erasing the
previously acquired waveforms. This is similar to infinite persistence
on an analog storage oscilloscope. These acquisitions will stay on the
display until Mode is changed, or until the waveform is adjusted by a
control that causes the display to change, such as s/Div, Delay, or
Connect Dots from On to Off.
When in Accumulate mode, the operation of the display grid follows
special rules when turned on or off (refer to the Grid Field paragraph
later in this chapter).