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5.Advanced User Guidebook
32
What is Nyquist frequency?
The Nyquist frequency is the highest frequency that any real-time digitizing oscilloscope
can acquire without aliasing. This frequency is half of the sample rate. Frequencies above
the Nyquist frequency will be under sampled, which causes aliasing. So pay more
attention to the relation between the frequency being sampled and measured.
Note
：
In FFT mode, the following settings are prohibited:
1) Window set;
2) XY Format in Display SET;
3) Measure.
Use VERTICAL POSITION and VOLTS/DIV Knobs
1. The VERTIVAL POSITION knob is used to adjust the vertical positions of the
waveforms, including the captured waveforms and calculated waveforms.
The analytic resolution of this control knob changes with the vertical division.
2. The VOLTS/DIV knob is used to regulate the vertical resolution of the wave
forms, including the captured waveforms and calculated waveforms. The
sensitivity of the vertical division steps as 1-2-5. Turning clockwise to increase
vertical sensitivity and anti-clockwise to decrease.
3. When the vertical position of the channel waveform is adjusted, the changed
value is displayed at the left bottom corner of the screen (see Figure 5-13).
Figure 5-13 Information about Vertical Position
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