Hey,
So, here is the thing; after doing a lot of low noise measurements on some circuits recently I noticed that most of the noise still stayed, even after switching the circuit of. I therefore decided to have a look at the internal noise of the scope, by short circuiting the probes - I had no idea what to suspect.
To be honest, the result was pretty disappointing, so I am starting to suspect a potential fault in the scope. Below are some screenshots from the measurements:
(The scope in question is a Siglent SDS 1202X-E)
For some strange reason the noise seems to be way better today than yesterday, where it was like 1 mVRMS and 20 mVPk-Pk.
My question:
Is this normal for a scope, or is this specific unit faulty?
I am pretty inexperienced with scopes, so please be gentle.
Thanks in advance,
Leo