RIGOL
© 2008 RIGOL Technologies, Inc.
User’s Guide for VS5000 Series
2-17
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:
z
Measuring harmonic content and distortion in systems
z
Characterizing noise in DC power supplies
z
Analyzing vibration
Table 2-6 FFT Function
Function
Setting
Description
FFT
OFF
ON
Turn off the FFT.
Open the FFT.
Operation
A+B
A-B
A×B
FFT
Add source A and source B
Subtract source B from source A
Multiply source A by source B
Fast Fourier Transform
Digital filter
Source
CH1
CH2
Define CH1 or CH2 as FFT source
Window
Rectangle
Hanning
Hamming
Blackman
Select window for FFT
Split Window
Split Window
Full Window
Display split waveform
Display full waveform
Scale
Vrms
dBVrms
Set “Vrms ” as vertical unit
Set “dBVrms ” as vertical unit
Summary of Contents for VS5000 Series
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