UNI-T UPO2000E Series, Руководство пользователя

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4 . 1 Sampling Rate
(1) Sampling and Sampling Rate
Sampling means that the oscilloscope samples the input analog signal, converts the sample to digital data, and
then the digital data will be collected into waveform records stored in the acquisition memory.
Sampling rate refers to the time interval between two sampling points. The maximum sampling rate of the UPO2000E
series is 1 GS/s.
The sampling rate will be affected by the time base scale and the memory depth. UPO2000E oscilloscopes displays the
sampling rate in real time at the top status bar, user can change the horizontal time base by adjusting the horizontal
SCALE knob or change the memory depth to change the sampling rate.
Analog Singal Sampling Points
(2) Low Sampling Rate Effect
a
.
W aveform Distortion
:
Due to low sampling rate
,
the details of the waveform might be missing
,
which makes a
great difference between sampling waveform and actual signal
.
b. 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.
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