GW Instek GDS-200 Series User Manual - Manual (Page 111)

OPERATION
111
Set the Interpolation
Background The GDS-200/GDS-300 has two types of
interpolation modes: ET (Equivalent Time) and
Sin(x)/x interpolation. Equivalent time
sampling is able to achieve a sample rate of
20GSa/s when sampling periodic waveforms.
Sin(x)/x interpolation uses a sinc interpolation
formula to reconstruct a continuous signal
between sampled points.
Sin(x)/x Samples of data are used to
reconstruct a single waveform.
Sin(x)/x sampling should be
used when the time base is fast
or if single shot events need to be
captured.
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 usually used when
the time base is too fast for real-
time sampling.
Steps From the Acquire menu, press Interpolation
and select the interpolation method.
Interpolation ET, sin(x)/x
Interpolation
menu