Table of Contents
Advertisement
To Select Waveform Interpolation Method
Under real-time sampling, the oscilloscope acquires the discrete sample values of the
waveform being displayed. In general, a waveform comprised of a singular dot per sample
point 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.
The interpolation method 'connects all the sampled points', to estimate the whole
appearance of the waveform. The oscilloscope can use interpolation to fill in the gaps
between points and accurately reconstruct a waveform.
Press the Acquire button on the front panel to enter the ACQUIRE Function menu; then
press the Interpolation softkey to select Sinx/x or x.
�
x: The adjacent sample points are directly connected with a straight line. This method
is confined to rebuilding the edge of signals, such as a square wave.
�
Sinx/x: Connecting the sampling points via mathematical calculation has more
versatility. Sinx/x interpolation method uses mathematical processing to calculate
results in the actual sample interval. This method involves mthematically calculating
the signal waveform, and allows it to produce a more realistic shape than pure square
wave and pulse. When the sampling rate is 3 to 5 times the bandwidth of the system,
the Sinx/x interpolation method is recommended.
1.800.561.8187
40
Figure 11: Display Type Set to Dots
www.
.com
information@itm.com
Advertisement
Table of Contents
