UNI-T UTD4000 Series - Page 35

UTD4000 Four-channel
User Manual
26
FFT spectrum analysis
By using the FFT (Fast Fourier Transform algorithm
you can convert time domain signals YT into
frequency domain signals With FFT you can
conveniently observe the following types of
signals
Measure the harmonic wave composition and
distortion of the system
Demonstrate the noise characteristics of the DC
power
Analyse oscillation
) ,
( )
. ,
:
●
●
●
Figure FFT Frequency
2-11
Fundamental
frequency
component 1 MHz
Third harmonic
frequency
component 3MHz
FFT vertical
graticule unit mV
horizontal
graticule unit
Hz div
;
/