# \#fourier **URL:** https://forum.plexim.com/tag/fourier/348.md [Latest](https://forum.plexim.com/latest.md) · [Categories](https://forum.plexim.com/categories.md) · [Tags](https://forum.plexim.com/tags.md) --- ## [How can I see the magnitude and frequency of signal(DFT)?](https://forum.plexim.com/t/how-can-i-see-the-magnitude-and-frequency-of-signal-dft/911)
**Author:** [@EMdude](https://forum.plexim.com/u/EMdude)\ **Replies:** 5\ **Last updated:** [January 15, 2021, 12:29pm UTC](https://forum.plexim.com/t/how-can-i-see-the-magnitude-and-frequency-of-signal-dft/911 "2021-01-15T12:29:20Z")
hello everyone, I am trying to obtain the Fourier transform of signal by using the DFT of PLECS but I got some weird result. so here is very simple sinewave generator and the DFT block: DFT\_plecs\_1 here is the resu… --- ## [Overlaying reference harmonics onto the Scope FFT display](https://forum.plexim.com/t/overlaying-reference-harmonics-onto-the-scope-fft-display/936)
**Author:** [@Josh\_SP](https://forum.plexim.com/u/Josh_SP)\ **Replies:** 2\ **Last updated:** [January 5, 2021, 4:07am UTC](https://forum.plexim.com/t/overlaying-reference-harmonics-onto-the-scope-fft-display/936 "2021-01-05T04:07:39Z")
Hi all. I would like to use PLECS to plot the current harmonics of a number of different circuit topologies. For each simulation I would also like to overlay the measured harmonics with some reference harmonics limits t… --- ## [Problem about Fourier analysis](https://forum.plexim.com/t/problem-about-fourier-analysis/874)
**Author:** [@htl842755](https://forum.plexim.com/u/htl842755)\ **Replies:** 1\ **Last updated:** [October 13, 2020, 1:33pm UTC](https://forum.plexim.com/t/problem-about-fourier-analysis/874 "2020-10-13T13:33:30Z")
I want to get the magnitude of harmonic at 720kHz, and the base frequency is set as 50 Hz. But it seems that the maximum number of Fourier coefficients(N) in the scope can be only set to 10 000 ? --- ## [Continuous: Fourier Transform, RMS Value and THD](https://forum.plexim.com/t/continuous-fourier-transform-rms-value-and-thd/821)
**Author:** [@Andrew](https://forum.plexim.com/u/Andrew)\ **Replies:** 1\ **Last updated:** [August 3, 2020, 1:26pm UTC](https://forum.plexim.com/t/continuous-fourier-transform-rms-value-and-thd/821 "2020-08-03T13:26:30Z")
Hello, How can implement: \[b\]Continuous Fourier Transform\[/b\] \[b\]Continuous RMS Value\[/b\] \[b\]Continuous THD Value\[/b\] if I do not have PLECS 4.4. ??? Is there any posibility of doing that? Or I must have PLECS … --- ## [I have conflict between THD from the scope and from normal calculation for the following signal](https://forum.plexim.com/t/i-have-conflict-between-thd-from-the-scope-and-from-normal-calculation-for-the-following-signal/625)
**Author:** [@mhalqa01](https://forum.plexim.com/u/mhalqa01)\ **Replies:** 3\ **Last updated:** [March 4, 2019, 2:04am UTC](https://forum.plexim.com/t/i-have-conflict-between-thd-from-the-scope-and-from-normal-calculation-for-the-following-signal/625 "2019-03-04T02:04:45Z")
I have read the answer of the question “What is the method for calculating THD in PLECS? Why does the THD value in PLECS look like not right” but I still have a doubt for the value I got from the scope. I got around 111… --- ## [What is the method for calculating THD in PLECS? Why does the THD value in PLECS look like not right?](https://forum.plexim.com/t/what-is-the-method-for-calculating-thd-in-plecs-why-does-the-thd-value-in-plecs-look-like-not-right/585)
**Author:** [@Jeremy\_C](https://forum.plexim.com/u/Jeremy_C)\ **Replies:** 4\ **Last updated:** [November 7, 2018, 9:39am UTC](https://forum.plexim.com/t/what-is-the-method-for-calculating-thd-in-plecs-why-does-the-thd-value-in-plecs-look-like-not-right/585 "2018-11-07T09:39:33Z")
Hello! Fig. 1 (The waveforms in the scope): Fig. 2 (The Fourier Analysis results of these waveforms): Fig. 3 (My setting of the Fourier Analysis tool): We can see that in Plot 1, the THD value is so high(=80…