[sdiy] oscillator jitter / phase noise

Magnus Danielson cfmd at bredband.net
Fri Jun 4 20:38:20 CEST 2004


From: René Schmitz <uzs159 at uni-bonn.de>
Subject: Re: [sdiy] oscillator jitter / phase noise
Date: Fri, 04 Jun 2004 13:50:00 +0200
Message-ID: <40C061E8.7080000 at uni-bonn.de>

Hi René,

> > I think the issue is that it might be somewhat recordable, but it's not
> > recorded accurately and precisely enough to make some good
> > "laboratory-grade" measurements of it. 
> 
> Thats more or less what I have said in the second paragraph....
> 
> I would suggest to the lab equipement turned off, and _listen_ first.

It's easy to measure stuff, it is easy to make gazillions of measurements which
have vauge or even none connection to the characterisation of some effect.
It takes quite some effort to both measure and listen to _really_ make a good
qualitative measurement connection to an psychoacoustical effect.

> > Also, just because something might be difficult to measure, certainly
> > doesn't mean it doesn't exist, or that it doesn't matter.
> 
> Hmm, thats also often heared from audiophiles....

Indeed, so see my comment to that. ;O)

Cheers,
Magnus



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