| Filename | Description |
|---|---|
| dft.mcd |
Example of calculating the discrete (digital) Fourier transform on one cycle of a waveform by formula.
Excel version using the Analysis Toolpak. VB code implementing the DFT. |
| sliding_dft.mcd | Applying the DFT in a sliding window along a waveform greater than one cycle in length. |
| actual_dft.mcd | Sliding-window DFT applied to an actual waveform captured by a microprocessor protective relay during energization of a 1300 MVA, 500 kV transformer bank. Waveform is B-phase current measured on the 500 kV side. Data read from a COMTRADE file. |
| rms.mcd | Example of calculating the root-mean-square (RMS) value of one cycle of a waveform by formula. |
| sliding_rms.mcd | Applying RMS calculation in a sliding window along a waveform greater than one cycle. |
| actual_rms.mcd | Sliding RMS calculation applied to the same waveform used in the actual_dft.mcd example. |
| discrete_convolution.mcd | Example of discrete convolution of two number sequences. Animation: discrete_convolution animation |
| russ_mcad_files.zip | Zip file containing the Mathcad worksheets used in the examples above. |