Saluki DSO1000, User Manual

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Operations Source Options Comments
－
CH1-CH2 Subtract the Channel 2 waveform from the Channel 1 waveform.
CH2-CH1 Subtract the Channel 1 waveform from the Channel 2 waveform.
CH3-CH4 Subtract the Channel 4 waveform from the Channel 3 waveform.
CH4-CH3 Subtract the Channel 3 waveform from the Channel 4 waveform.
X
CH1XCH2 Multiply CH1 with CH2.
CH3XCH4 Multiply CH3 with CH4.
/
CH1/CH2 CH1 Divided by CH2
CH2/CH1 CH2 Divided by CH1
CH3/CH4 CH3 Divided by CH4
CH4/CH3 CH4 Divided by CH3
FFT
CH1, CH2,
CH3 or CH4
Five types of window available for selection: Hanning, Flattop, Rectangular,Bartletta and
Blackman
Zoom: Use the FFT Zoom button to adjust the window size.
Scale: x1, x2, x5, x10.
Note:
All selected menus are highlighted in orange.
5.3.1 Math FFT
This chapter elaborates how to use the Math FFT (Fast Fourier Transform). You can use the Math FFT mode to
convert a time-domain (YT) signal into its frequency components (spectrum), and to observe the following types of
signals:

Analyze harmonics in power cords;

Measure harmonic content and distortion in systems;

Characterize noise in DC power supplies;

Test impulse response of filters and systems;

Analyze vibration.
To use the Math FFT mode, perform the following tasks:

Set the source (time-domain) waveform;

Display the FFT spectrum;

Choose a type of FFT window;

Adjust the sample rate to display the fundamental frequency and harmonics without aliasing;

Use zoom controls to magnify the spectrum;