Using Fft Function - Rigol DS1074B User Manual

RIGOL

1. Using FFT function

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

Press MATH→Operate→FFT to enter FFT setting menu.
Figure 2-18 Table 2-8 The FFT menu (Page 1/2)
Menu
Operate
Source
Window
Display
Figure 2-19 Table 2-9 The FFT menu (Page 2/2)
Menu
Scale
Reset
2-16
Settings Comments
A+B Add source A to source B.
A-B Subtract source B from source A.
A×B Multiply source B by source A.
FFT Fast Fourier Transform.
CH1, CH2, Define CH1, CH2, CH3 or CH4 as FFT
CH3, CH4 source.
Rectangle
Hanning
Select window for FFT.
Hamming
Blackman
Split Display FFT waveform on half screen.
Full screen
Display FFT waveform on full screen.
Settings comments
The multifunctional knob (
the vertical position of Math
The multifunctional knob (
the vertical amplitude of Math
V Set V
RMS
dBV Set dBV
RMS
Reset the math waveform to vertical
mid-point.
as vertical scale unit
RMS
as vertical scale unit
RMS
User's Guide for DS1000B series
) adjusts
) adjusts