Use Vertical Position And Volts/Div Knobs - Promax OD-610 User Manual

DC component or offset can cause incorrect magnitude values of FFT
waveform. To minimize the DC component, choose AC Coupling on the
source signal.
To reduce random noise and aliased components in repetitive or single-
shot events, set the oscilloscope acquisition mode to average.
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:
Window set;
XY Format in Display SET;
Measure.
3.2

Use VERTICAL POSITION and VOLTS/DIV Knobs

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.
The VOLTS/DIV knob is used to regulate the vertical resolution of the
wave
waveforms. The sensitivity of the vertical division steps as 1-2-5.
Turning clockwise to increase vertical sensitivity and anti-clockwise to
decrease.
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forms, including the captured waveforms and calculated
June 2017