Sample Control
32
5.6 Sampling Mode
The oscilloscope only supports real-time sampling. In this mode, the oscilloscope samples and displays waveform within
a trigger event. The maximum real-time sample rate is 1GSa/s.
Press the RUN/STOP button to stop the sample, the oscilloscope will hold the last display. When stopped the vertical
control and horizontal control are used to pan and zoom the waveform.
5.7 Interpolation Method
Under real-time sampling, the oscilloscope acquires the discrete sample values of the waveform being displayed. In general,
a waveform of dots display type is very difficult to observe. In order to increase the visibility of the signal, the digital
oscilloscope usually uses the interpolation method to display a waveform.
Interpolation method is a processing method to “connect all the sampling points”, and using some points to calculate
the whole appearance of the waveform. For real-time sampling interpolation method is used, even if the oscilloscope in
a single captures only a small number of sampling points. The oscilloscope can use interpolation method for filling out
the gaps between points, to reconstruct an accurate waveform.
To set the
Interpolation Method
:
Press the Acquire button on the front panel to enter the
Acquire Function
menu.
Press the
Interpolation
softkey to toggle between
Sinx/x
and
X
.
•
X
: In the adjacent sample points are directly connected on a straight line. This method is only confined to rebuild
on the edge of signals, such as square wave.
Figure 5.5
Interpolation Method X
Summary of Contents for 2194
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