Fft - Rigol MSO7000 Series User Manual

RIGOL
of Math3 can be CH1-CH4, Ref1-Ref10, Math1, or Math2; the source of Math4
can be CH1-CH4, 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 directly rotate Wave Vertical
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
directly rotate Wave Vertical
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
⚫
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
⚫
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). MSO7000/DS7000
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;
⚫
Display the characteristics of the noise in DC power;
⚫
Analyze vibration.
⚫
Press Math → Math1 → Operator to select "FFT":
Press Operation continuously to enable or disable the FFT operation function.
⚫
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
POSITION or enable the touch screen
SCALE or enable the touch screen to adjust
MSO7000/DS7000 User Guide