User’s Manual MSO/UPO2000 Seri es
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10.1 Sampling Rate
(1) Sampling and Sampling Rate
Sampling is the oscilloscope sampling the input analog signal and then convert it to digital data.
Gathering the digital data to waveform record and stored in sampling memory.
Analog Input Signal
Sampling Point
Sampling rate refers to the time interval between two sampling points. The maximum sampling rate of the
MSO/UPO2000 series is 2 GS/s.
The sampling rate will be affected by the change of timing scale and storage depth.
MSO/UPO2000
oscilloscopes
sampling rate is displayed in real-time in the status bar on the top of the screen. The horizontal SCALE knob can
adjust the horizontal time base or modify the memory depth to change it.
(2) The influence of low sampling rate
①
Waveform Distortion: Due to low sampling rate, the details of the waveform might be missing,
the sampling waveform might be different than the actual signal. As shown in Figure 10-1.
Figure 10-1
②
Wave Mixing: When the sampling rate is 2 times lower than the actual signal frequency
(Nyquist frequency), the frequency of the reconstructed signal will be less than the actual signal
frequency. As shown in Figure 10-2.
Figure 10-2
