Quote:
Originally Posted by mschnell
This rather obviously is a measurement problem.
-Michael
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I'll make some more measurements, but from what I recall, the 'noise' I was seeing was not in the audio range. It was probably from USB data, but it could also be that the probes I am using are junk.
The scope is a Siglent SDS1104X-E. It appears to be a decent scope for the money, but came with junk probes.
That said, I also recall having compared the output of the UMC with the output of the built-in Realtek audio on the PC, and didn't see the noise on the Realtek. I will take the measurements again when I get more curious.
Generally, i am happy with the sound from the UMC202HD. It's the Windows 10 drivers that gives me a problem.