Hi and thanks for the very helpful reply.
I was following a discussion about testing of different low noise regulator solutions.
There were guys trying to go down to few uV of noise ...
Then i tried to understand here and on Youtube how to measure these low noise levels ... it is challenging indeed. That means difficult and expensive.
So i asked those guys what they were using.
Only one answered ... the ear.
I have the feeling that this is not the best/right approach.
I have at hand a cheap scope from Hantek
I will try to measure some "gross" SMPS i have as a start ...
Unfortunately this scope has no AC coupling feature.
So i have to provide myself in some ways. I will ask for advice here, as usual.
To end, i tend to like the least noise possible always.
Thanks a lot again.
gino
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Hi and thanks and this is also my conclusion.
Measuring very low level noise is challenging. That is clear.
Very challenging also. But it could be also educational.
I hope ...
I really like a very silent system when there is no signal at the input.
I my experience is the source that adds almost all the noise.
But the noise can be of different nature, even ground loop for instance.
I have to say that my set ups are quite weird ... with cables everywhere.
Thanks again, gino
If someone says they don't know how to use their scope, then the next step is to aid in troubleshooting.
Hence - the carriage return and not a colon( : ).
This is a red herring. Served live, they wildly slap the fish monger during the handoff.
/ignore
Yes, I agree that post #42 is not strictly true. If someone says, "That was a loud noise," that is a measurement. Comparative only, the reference being common, usual everyday noise. And no doubt different for a librarian or steelworker. Equally valid, though, in their proper context, with decibels.
Measurement usually requires numbers, related to some agreed standard or reference. Ears are quite bad at numbers, especially for amplitude.
There's a list for ignoring people here. A useful tool for ignoring churlish or simply unconsciously ignorant users, especially when they become a majority of the things one chooses to print.
For anyone who is unfamiliar, it is under the user control panel, edit options, ignore list.
Cheers.
For anyone who is unfamiliar, it is under the user control panel, edit options, ignore list.
Cheers.
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