GSi Protek 1000 Series, User Manual

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Source A
CH1
CH2
Define CH1 or CH2 as source A.
Source B
CH1
CH2
Define CH1 or CH2 as source A.
Invert
ON
OFF
Invert the MATH waveform.
Waveform display normal.
7. 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:
■
Measure harmonic content and distortion in systems
■
Characterize noise in DC power supplies
■
Analyze harmonics in power lines
■
Analyze vibration
The FFT menu
Figure 2-12
The FFT menu
The FFT menu table
Menu Setting Description
Source CH1CH2 Define CH1 or CH2 as FFT source.
Window
Rectangle
Hanning
Hamming
Blackman
Select window for FFT.
Scale
VrmsdBVrms Set “Vrms” as vertical unit.
Set “dBVrms” as vertical unit.
Note:
1) Signals that have a DC component or offset can cause incorrect FFT waveform
component magnitude values. To minimize the DC component, choose AC Coupling on
the source signal.
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