User Manual

GDS-3000 Series User Manual
106
Real time vs Equivalent Time Sampling Mode
Background
The sampling mode on the GDS-3000 can be
switched between two sampling modes: Real-time
and Equivalent-time. The number of active
channels in operation will determine the sampling
rate of the DSO. The sampling rate and mode
depends on the number of active channels and
whether the oscilloscope model has 2 or 4
channels.
Parameter
Real-time
sampling
One sample of 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.
Equivalent-
time sampling
Sampled data is accumulated a
number of times to reconstruct a
single waveform. This increases the
sampling rate, but can only be used
for repetitive signals. This mode is
used when the sampling rate
becomes higher.
Real-time Vs.
Equivalent-time