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Real time vs equivalent time sampling mode – GW Instek GDS-1000 Series User Manual User Manual

Page 54

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GDS-1000 Series User Manual

54

7. Press Normal.

8. Press Peak-Detect and see

that a spike noise is
captured.

Peak

Detect

Example

The peak detect mode reveals the occasional glitch.

Normal

mode

Peak detect mode

Real time vs Equivalent time sampling mode

Backgrounds

The oscilloscope automatically switches between
two sampling modes, Real-time and Equivalent-
time, according to the number of active channels
and sampling rate.

Real-time
sampling

One sampled data is used to reconstruct a single
waveform. Short-time events might get lost if the
sampling rate gets too high. This mode is used
when the sampling rate is relatively low
(250MSa/s or lower).

Equivalent-time
sampling

Multiple numbers of sampled data are
accumulated to reconstruct a single waveform.
Restores greater waveform details but takes longer
to update the waveform. This mode is used when
the sampling rate becomes higher than 250MSa/s.
The maximum equivalent-time sampling rate is
25GSa/s.