Thanks !
-83db@20kHz 26db, -62db@20kHz 26db
Pick one
Should this read -62db@20kHz 0db ?
-83db@20kHz 26db, -62db@20kHz 26db
Pick one
Should this read -62db@20kHz 0db ?
yes, sorry, my bad.Thanks !
-83db@20kHz 26db, -62db@20kHz 26db
Pick one
Should this read -62db@20kHz 0db ?
9039S is kinda lite Cosmos DAC, 45x20mm PCBA.
Usually, I use another sine gen but today I run REw's one and got THD -146db on the same sample! Completely vanished H7 for instance.
by "less" you mean 24bits, 23bits and so on i reckon? Just to be sure...Dithering has to be set properly of course, that is, to 24bits or less, otherwise harmonics at ~-150dBFS may appear depending on the ratio of the test frequency vs sample rate.
Yes. For example, 1khz (exact, not nearest bin center) with 96kHz SR looks like that in a 4M FFT, without dithering. The sample train consists of only 96 different values and those are truncated/rounded to 24 bit, hence the accumulated error.by "less" you mean 24bits, 23bits and so on i reckon? Just to be sure...
Thank you, and appreciated.KSTR, I do all work by myself and things go slower than I wish. For example, 9038S I tried >10 PCB versions before I got a decent THD+N performance under 16ohm load. The first version I had in Jul 2023, and only in Apr 2024 I'll be ready for production. The next model is Cosmos DAC which has to be even better, and I have no idea how. My design reminds a slow fine-polishing process, I can't say if I have plans for something else until I finish the current model.