Introduction - If you have any usage issues, please Google them yourself
Using a graphical method to display some of the properties of the Fourier transform (should include at least the time-shift the nature of the nature and scale transformation) for the signal time shift and the relationship of the spectrum, to select a signal, it shift in the time domain, size, then adjust the different time-shifting software demo Fourier transform almost no transformation in amplitude, but there will be changes in the phase. Scale transformation for the time and frequency of the signal, a signal is given, and to maintain a constant amplitude, so that the width of the signal change, and then observe the changes in the frequency domain.