[sdiy] 5mV of noise ...

[Paul Perry]

----- Original Message ----- 
From: "Peter Blackett" 
> I think it depends on what the normal or expected signal level is !
> I mean that it is the signal to noise ratio that you need to be
> concerned about ,rather than the actual noise level.

Also, the 'type' of noise is an issue.
Random white noise is far less noticeable or disturbing than 
a fixed frequency whine from a power supply, or aliasing artifacts 
from a/d conversion, or ring modulator carrier bleed through.

Looking at 'grass' on a scope gives an indication of the noise level,
but what is 'acceptable' comes  from one's ears, as always.

paul perry Melbourne Australia