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- What exactly are harmonics and how do they appear?
The blue sine which shows 1 period is the fundamental Then there's the third harmonic (square waves don't have even harmonics), the purple one Its amplitude is 1 3 of the fundamental, and you can see it's three times the fundamental's frequency, because it shows 3 periods Same for the fifth harmonic (brown)
- How do I calculate THD? - Electrical Engineering Stack Exchange
Of course, after a certain index of harmonic the THD measurement will not change much, but that depends on the frequency content or the original signal itself, and also your accuracy requirement So it's up to you i e you can start with up to 10th harmonic and calculate the THD, then up to 11th to see if it changes much, etc Instead,
- Help me understand FFT and harmonic distortions - Electrical . . .
I'm new to FFT and harmonic distortions I'm dealing with a power system where the phase currents are distorted Now I don't understand the concept of FFT and why the harmonics seen in FFT relate to the current waveforms FFT shows how the current waveform changes in gain by frequency instead of time
- telecommunications - Standards for Total Harmonic Distortion in . . .
I found IEEE 519, but it primarily addresses the design of electrical systems Perhaps the focus should be on determining the lowest level of harmonic distortion below which the human ear cannot perceive audio distortion? The original message signal is a sine wave, and distortion with respect to the original message signal needs to be measured
- filter - What is the harmonic content of a PWM signal? - Electrical . . .
Suppose I'm using a 3 6 kHz carrier to reproduce a 60 Hz sine wave To properly design a filter for this application to hit a specific harmonic distortion target, I need to know the harmonic content of the PWM signal How can I predict what that harmonic content is? Is it going to vary dramatically with the pulse widths?
- power - Class F Amplifier Harmonic Termination - Electrical Engineering . . .
I try to build a RF amplifier using the CGH40010F HEMT The amplifier should work between 2 4 and 2 5 GHz and I would like to have at least 5 Watts of output power While I was searching for inform
- signal - Whats the relationship between harmonic distortion and . . .
Harmonic Distortion is not related to intermodulation distortion Here is another point I make, if you remove part of a sine wave, the harmonic spectrum exactly matches the harmonic content of that feature Here is a shot of the peak of a sine wave clipped off, all by itself and its spectrum
- EMC emission harmonics - Electrical Engineering Stack Exchange
Half of 25 MHz is 12 5 MHz and, 62 5 MHz is the fifth harmonic 312 5 MHz is the 25th harmonic of 12 5 MHz Try looking for other harmonics in between that may be a lower level and you have not noticed Anyway, the EMI will be related to sub-harmonics of 25 MHz and almost certainly not due to the basic crystal frequency
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