Rigol VS5000 Series User Manual page 49

RIGOL
3. Using the FFT
The FFT (Fast Fourier Transform) process converts a time-domain signal into its
frequency components mathematically. FFT waveforms are useful in the following
applications:
Measuring harmonic content and distortion in systems
Characterizing noise in DC power supplies
Analyzing vibration
Table 2-6 FFT Function
Function
FFT
Operation
Source
Window
Split Window
Scale
© 2008 RIGOL Technologies, Inc.
Setting
OFF Turn off the FFT.
ON Open the FFT.
Add source A and source B
A+B
Subtract source B from source A
A-B
Multiply source A by source B
A×B
Fast Fourier Transform
FFT
Digital filter
CH1
Define CH1 or CH2 as FFT source
CH2
Rectangle
Hanning
Select window for FFT
Hamming
Blackman
Split Window Display split waveform
Full Window Display full waveform
Vrms Set "Vrms " as vertical unit
dBVrms Set "dBVrms " as vertical unit
User's Guide for VS5000 Series
Description
2-17