User Manual

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4.4 Sampling Mode
The oscilloscope only supports real-time sampling. In this mode, the oscilloscope samples and
directly displays the waveform containing a trigger event. The maximum real-time sample rate
of the oscilloscope is 1 GSa/s.
Press the Run/Stop button to stop the sampling and the oscilloscope will display the last
waveform sample. Use the vertical and horizontal controls to explore the waveform in more
detail.
4.5 Waveform Interpolation Method
With real-time sampling, the oscilloscope acquires a single set of samples in real time. You can
display these samples using dots by pressing Display → Type and choosing Dots. Switch between
the dots and vector display to see how the display methods differ. The vector display method
draws lines connecting the dots; this is called interpolation. Most users seem to prefer an
interpolated waveform, as it coincides with the notion of a continuous function.
There are two interpolation methods provided: x and Sinx/x. The first type connects the dot with
a straight line. Sinx/x interpolation connects the dots with curves, leading to a more accurate
display for real-world signals.
Press the Acquire button and go to page 2 of the ACQUIRE menu. Press the Interpolation button
to select either x or Sinx/x for the interpolation method.
• x: Sample points are directly connected using a straight line. This method is
recommended for square waves and pulses to maintain fast rising and falling edges.
• Sinx/x: This interpolation method connects the sampled points with curves. When the
sampling rate is 3 to 5 times the bandwidth of the system, Sinx/x interpolation method is
recommended.