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  1. What exactly are harmonics and how do they "appear"?

    May 21, 2012 · 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 …

  2. How do I calculate THD? - Electrical Engineering Stack Exchange

    Apr 24, 2024 · 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 …

  3. filter - What is the harmonic content of a PWM signal? - Electrical ...

    Jun 25, 2015 · 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 …

  4. telecommunications - Standards for Total Harmonic Distortion in ...

    Dec 2, 2024 · 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 …

  5. Help me understand FFT and harmonic distortions - Electrical ...

    Jan 9, 2015 · 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 …

  6. Why harmonic distortion and not at other frequencies?

    Apr 22, 2020 · Harmonic distortion is harmonic because it is related to the primary periodic waveform that is the basis for comparison. A nonlinear impedance effects every cycle of the …

  7. amplifier - Calculate total harmonic distortion - Electrical ...

    May 18, 2020 · Total Harmonic Distortion fundamental frequency clarification. 1. Efficient method of measuring total ...

  8. EMC emission harmonics - Electrical Engineering Stack Exchange

    Jan 11, 2023 · 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 …

  9. signal - Harmonic detection using lock-in amplifier - Electrical ...

    May 3, 2019 · Since lock-in amplifiers are non-harmonically sensitive , you can obtain better performance using Type I PLL harmonic mixers with the BW of the loop filter needed to reject …

  10. rf - Mixers and LO Harmonics - Electrical Engineering Stack Exchange

    Apr 12, 2023 · The problem arises when we consider what happens when the component at \$3F_{LO}+\Delta\$ gets mixed with the \$3F_{LO}\$ harmonic, as it creates a difference …