Timeline for What's the junk at the end of my FFT in LTSPICE?
Current License: CC BY-SA 3.0
12 events
| when toggle format | what | by | license | comment | |
|---|---|---|---|---|---|
| Oct 4, 2018 at 16:31 | comment | added | D.A.S. | Do you need Quasi peak to match audio spectrum for modulation BW?? | |
| Apr 30, 2018 at 15:44 | vote | accept | watkipet | ||
| Apr 30, 2018 at 14:38 | history | edited | watkipet | CC BY-SA 3.0 |
Changed the title because it's now apparent that LTSPICE itself is really part of the question.
|
| Apr 28, 2018 at 16:01 | answer | added | a concerned citizen | timeline score: 7 | |
| Apr 27, 2018 at 10:20 | history | tweeted | twitter.com/StackElectronix/status/989811607533432832 | ||
| Apr 27, 2018 at 9:07 | answer | added | Andy aka | timeline score: 0 | |
| Apr 27, 2018 at 8:13 | comment | added | loudnoises | I'm unable to reproduce this data, my version of LTspice wants over 1e6 simulated points to get an FFT of 1e6 points, i.e. a maximum time step of 1e-6. | |
| Apr 27, 2018 at 4:15 | answer | added | D. Brown | timeline score: 16 | |
| Apr 27, 2018 at 0:22 | comment | added | user57037 | Could have something to do with waveform compression. See this other question for more details and how to check if that is the case. electronics.stackexchange.com/questions/338292/… | |
| Apr 27, 2018 at 0:18 | comment | added | D.A.S. | I wouldn't look below -100dB but start with the 3rd harmonic, no window seems to be an issue | |
| Apr 27, 2018 at 0:18 | comment | added | Marcus Müller | Can you really pinpoint the other frequencies? Do they happen to be all odd multiples of 1 kHz? In that case, something's distorting your "perfect" sine to look more "rectangled", and it might just be the numerical accuracy that ltspice uses internally. | |
| Apr 26, 2018 at 23:57 | history | asked | watkipet | CC BY-SA 3.0 |