Sampling rate refers to the time interval between two sampling points. The
maximum sampling rate is 1 GS/s.
The sampling rate will be affected by the timing scale and the change of
storage depth. UTD2000CEX-II oscilloscopes sampling rate is displayed in
real-time at the top of the screen in the status bar. The horizontal SCALE
knob can be used to adjust the horizontal timebase or modify the memory
depth.
(2) Low Sampling Rate Effect
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
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.
3.Waveform Leakage: Due to low sampling rate, the reconstructed waveform
might not reflect the actual signal
6.2 Acquisition Mode
To obtain a waveform from sampling points, press the ACQUIRE key, then
press F1 key to switch the acquisition methods.
(1) Normal Sampling
In this acquisition mode, the signal is sampled and reconstructed with equal
time intervals. For most waveforms, the use of this mode can produce the
best effect.
(2) Peak Sampling
In this acquisition mode, the maximum and minimum values of the input
signal are found at each sampling interval, and the waveform is displayed
by using these values. This way, the oscilloscope can acquire and display
a narrow pulse, otherwise the narrow pulse might be missed in the normal
mode. Noise might be enlarged in this mode.
(3) High Resolution
In this acquisition mode, the oscilloscope can reduce random noise from
the input signal and generate smoother waveforms.
High Resolution mode to minimize noise from small signal
(4) Average
In this acquisition mode, the oscilloscope obtains several waveforms and
finds the average, and displays the final waveform. This method can reduce
random noise.
Via changing the acquisition mode settings, the resulting waveform display
will be changed. The unaveraged and the 32 times averaged waveform are
displayed below for comparison.
UTD2000CEX-II
User Manual
Summary of Contents for UTD2000CEX-II Series
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