4.7.6. FFT

You can transform data in the time domain to the frequency domain by using the Fast Fourier Transformation method (FFT) in the chart view. At least one graph must be selected for the operations as in the following steps.

Figure 4.34: FFT operation

Figure 4.35: Steps for the FFT operation

Step	Description
1	Select the chart view.
2	Select the target graphs for the FFT operation.
3	Select FFT from the menu bar.
4	Select either Magnitude or Phase.
5	Select the Scale method. The resultant magnitude or phase will be scaled in the frequency domain. Original does not use the scale in the transformation. Logarithm uses the log scale with the base of 10. Decibel uses the log scale with the base of 10 and coefficient of 20.
6	Select the Window method. None does not use the window for FFT. Rectangular uses the window of Triangular uses the window of Bartlett uses the window of Hanning uses the window of Hamming uses the window of Welch uses the window of Blackman uses the window of
7	Set the number of data for FFT.
8	Set the start time of data for FFT
9	Set the end time of data for FFT
10	Select Remove Ori. Curve if you want to remove the target graphs.
11	Click the button to create the graph.
12	Click the button to close the operation.