Manual

Functional description
44 Two-channel digital Oscilloscopes
Functional description
IV - ACQUISITION system (cont'd)
Sample
The oscilloscope samples the signal at regular intervals to construct the
trace. In general, this mode gives an accurate representation of the signal.
Advantage
You can use this mode to reduce random noise.
Disadvantages
The "sample" mode does not capture the rapid variations of the signal
(glitches) that may occur between two successive samples. Aliasing may
result, and short pulses may not be detected. In the presence of a pulse
having a low width (glitch), you must use the "Peak detection" mode.
Peak detection
The Peak Detection mode captures the minimum and maximum values of a
signal between two successive samples.
Advantage
With this mode, the oscilloscope can capture short pulses (or glitches) that
might have escaped detection in the "sample" mode.
Drawback
The trace thickness (noise) will be larger in this mode.