Chapter 10 Sampling System
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⚫ To capture and display single acquisition (whether the oscilloscope is running or stopped), tap the
single sequence key for a single acquisition.
10.3 Select Sampling Mode
Open the channel menu, tap the sampling mode option under “Sample”, and choose among the four sampling
modes: normal, average, peak and envelope in the pop-up box.
The sampling modes of all channels are same. That is, if the sampling mode of any channel is changed, the
sampling mode of all channels is changed at the same time.
Normal sampling mode
Oscilloscope samples signal through equivalent time intervals to build waveform. When the time base of 20 ns
or faster is chosen, the oscilloscope automatically performs an interpolation algorithm that inserts difference point
between sampling points.
This mode produces the best display effects for most waveforms.
Peak sampling mode
In peak sampling mode, when the horizontal time base setting is low, the minimum and maximum sample values
are retained to capture rare events and narrow events (with any noise expanded). This mode will display all pulses
that are at least as wide as the sampling period.
When the time base is set to 200ms and above, the oscilloscope will automatically exit the peak sampling mode
and switch to the normal sampling mode.
Burr or narrow pulse capture
Burr is the rapid change in waveform that is usually narrower than waveform. Peak sampling mode can be used
to view burr or narrow pulses more easily. In the peak sampling mode, narrow burr and transition edges are
brighter than in those in the “normal” sampling mode, making them easier to see.
Applying the peak sampling mode can avoid signal aliasing but show more real noises.
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