RIGOL DS1000B - Manual (Page 46)

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