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Acquisition Modes
Reference
3Ć4
WaveformDrawn
on CRT
Takes One Acquisition per Trigger
Acquisition
Mode
Use to reveal variations in
the signal across time.
Use to reduce apparentnoise
in a repetitive signal.
Finds highest and
lowest record points over
many acquisitions
Uses first sample in
each interval over
single acquisition
Calculates average value for
each recordpoint over many
acquisitions
Multiple Waveform Acquisitions Single Waveform Acquisition
Sample
Envelope
Average
Acquisition 1 2 3
WaveformDrawn
on CRT
Takes a UserĆSpecified Number of Acquisitions per Trigger
Acquisition
Mode
Uses Sample Mode for Each Acquisition
Uses Sample Mode for Each Acquisition
This is the default mode.
Figure 3Ć1:ăHow the Acquisition Modes Work
Envelope Mode
Envelope mode lets you acquire and display a waveform record that shows
the extremes in variation over several acquisitions. You specify the number
of acquisitions over which to accumulate the data. The oscilloscope saves
the highest and lowest values in two adjacent intervals. Envelope mode
gathers peaks over many trigger events.
After each trigger event, the oscilloscope acquires data and then compares
the min/max values from the current acquisition with those stored from
previous acquisitions. The final display shows the most extreme values for
all the acquisitions for each point in the waveform record.