Recent content by IVX

THD+N gets about 1db better at 49MHz. I didn't notice a big dependency of THD vs temperature.

Before buying a reel of ES9039Q2M I decided to test 5pcs chips with the particular date code(not the same that I used for protos). The result is a bit better than 5pcs in protos. MLCK=49MHz THD+N L, R / MLCK=24MHz THD L, R 1 -125.9, -125.9 / -146, -146 2 -125.3, -125.3 / -147, -147 3 -125.7...

looks like Aliexpress changed something and Sunny can't sell over there some stuff anymore, please ask her for more details and how to buy [email protected] PS: my American friends call that phenomenon T.I.C. (This Is China).

I asked Sunny to write down an explanation for that situation because I also have no idea why it happened.

sseppala, this happens only with the German internet. Try please VPN.

sorry, no. I still working single.

I just tested 9039S 1000; 100; and 50Hz with AP SYS2522 and I got -119.3db; -118.5db and -117.3db. SYS2522 loopback has 118.4db; 116.7db and 115.3db.

It seems not dither is a matter but REW gen itself. 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.

well, I guess no, 24-32 bits isn't large dither and isn't high-frequency at all because it is applied before the interpolator.

yeah, hard to say.

It is interesting that adding a 32b dither improves the THD for a couple of db more.

a short video about 9039S as a sine source:

the keyword isn't "alien" but "ideal analyzer", the analyzer with zero residual distortions and noise.

I'm an ordinary chinese worker. Aliens nowadays look like that https://en.wikipedia.org/wiki/Grigori_Perelman

i.e. if imagine that aliens give you an ideal analyzer, the DAC rather has THD+N <-129db@1k, unlike AP showing that, and all other top DACs, as -124db :cool: PS: I want to let see that idea @JohnPM because I am an active REW user.