Fft - Rigol MSO5000-E Series User Manual

RIGOL
The available channels for Math3 are CH1-CH2, Ref1-Ref10, Math1 or Math2.
The available channels for Math4 are CH1-CH2, Ref1-Ref10, Math1, Math2 or
Math3. Only the channels that have been enabled currently can be selected.
Press Offset to set the vertical offset of the operation results. For setting
⚫
methods, refer to the descriptions in "Parameter Setting Method". You can
also enable the touch screen and use the "Drag" gesture to adjust the vertical
offset.
Press Scale to set the vertical scale of the operation results. For setting methods,
⚫
refer to the descriptions in "Parameter Setting Method". You can also enable
the touch screen and use the "Pinch & Stretch" gesture to adjust the vertical
scale.
Press More → AutoSetting to adjust the vertical scale and offset of the
⚫
operation results to the optimal value according to the current configuration, so
as to better observe.
Press More → Invert to enable or disable the inverted display function of the
⚫
waveform.
Press More → Expand to expand or compress the measurement waveform
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around the "Center" or "GND".
Press More → Label to set the label for math operation results. For details,
⚫
refer to descriptions in "Math Operation Label".
Press More → Color Grade to enable or disable the color grade display of the
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operation results. When enabled, different colors are displayed on the screen to
indicate the times of data acquisition or acquisition probability.
Press More → Reset ColorGrade to clear the color grade display and display
⚫
the color grade again.

FFT

FFT (Fast Fourier Transform) is used to transform time-domain signals to
frequency-domain components (frequency spectrum). MSO5000-E series
oscilloscope provides FFT operation function which enables you to observe the
time-domain waveform and spectrum of the signal at the same time. FFT operation
can facilitate the following works:
Measure harmonic components and distortion in the system;
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Display the characteristics of the noise in DC power;
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Analyze vibration.
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Press Math → Math1 → Operator to select "FFT":
Press Operation continuously to enable or disable the FFT operation function.
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When enabled, the operation results are displayed as purple waveforms on the
screen. At the same time, the parameters such as vertical scale, center
6-6
Chapter 6 Operations and Measurements
MSO5000-E User Guide