[sdiy] Handy DIY tip #213/noise color

[Magnus Danielson]

From: Grant Richter <grichter at asapnet.net>
Subject: Re: [sdiy] Handy DIY tip #213/noise color
Date: Tue, 14 Jan 2003 18:31:36 -0600

> BTW, how do you calculate the signal to noise ratio of a noise generator
> anyway?

Ever used a GPS?

The signal is so burried in noise that you can't pick it out on the spec.
This is also because the GPS signal is pseudo-noise... and waaay below the
natural noise level in the frequency band it covers.

The satellite to earth damping is a wooping 184 dB. Don't you just love
squeeinking signal deep into noise?

Naturally, one plays a number of tricks and can end up with really narrow
filters for the correlated signal and the signal to noise ratio is tolerable
but not actually "good".

BTW. I once tossed a 3 meter ordinary microphone cable (XLR in both ends) in
the claws of a network analyser... my -3 dB point where up in 45 MHz I think.
So much for skin-effects and all that crap they talk about in audio. They shoot
mosquitos with bazookas.

Cheers,
Magnus