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1.) Perform a TRAN-Analysis and measure exactly the period resp. frequnecy.
(Hint: Don´t use the PSPICE macro for this - it is not exact enough)
2.) Perform another TRAN-Analysis with FOURIER enabled (specify the fundamental carrier)
3.) Check the output file *.out. At the end of the file you will find the level of all harmonics and the calculated THD.
HINT: Don´t use the FOURIER option in PROBE (it is a FFT and very roughly)
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