When you acquire a signal, the oscilloscope converts it into digital form
and displays a waveform. The acquisition mode defines how the signal is
digitized and the time base setting affects the time span and level of detail
in the acquisition.
Sampling: In this acquisition mode, the oscilloscope samples
the signal in evenly spaced intervals to construct the waveform.
This mode accurately represents signals most of the time.
Advantage: You can use this mode to reduce random noise.
Disadvantage: This mode does not acquire rapid variations in the
signal that may occur between samples. This can result in aliasing
may cause narrow pulses to be missed. In these cases, you should
use the Peak Detect mode to acquire data.