Data Sheet

6 To Make Measurements RIGOL
MSO4000D/S4000 User’s Guide
6-5
FFT
The FFT is used to quickly perform a Fourier transform on the specified signals and
transform time domain signals to frequency domain signals. FFT operation can
facilitate the following works:
 Measure harmonic components and distortion in the system
 Measure the characteristics of the noise in DC power
 Analyze vibration
Press MATH  Operate to select “FFT” and set the parameters of FFT operation.
Note: LA bus display functions will be automatically turned off and disabled after
selecting the FFT operation.
1. Select Source
Press Source to select the desired channel. The channels available are CH1,
CH2, CH3 and CH4.
2. Select Window Function
Spectral leakage can be considerably decreased when a window function is used.
Vertical Amplitude Horizontal Scale FFT Sample Rate Center Frequency
Frequency Domain Waveform Time Domain Waveform