On Sat, 29 Apr 2006, Chris McCormick wrote:
On Fri, Apr 28, 2006 at 08:53:21PM -0400, Mathieu Bouchard wrote:
On Thu, 27 Apr 2006, Miguel Ramos wrote:
Never forget that if you put an analog square wave on one end of a long cable, on the other end what you will receive won't be a square wave, but a rounded version of it. Moreover, a squarewave is a digital concept mainly. There's really no way to do it in analog.
This is the cause of the limited "bitrate" of analog cables that I mention in the previous mail.
I would say it's more due to the resistance, impedance, capacitance of each individual wire that has a filtering effect on an electrical signal that moves through it.
That's the same thing, really. Capacitor effects and coil effects act as lowpass/highpass filters (though I never really recall which is which). Lowpass-filtering of a squarewave makes the Gibbs phenomenon appear: a wavy pattern appears at each discontinuity.
_ _ __ ___ _____ ________ _____________ _____________________ ... | Mathieu Bouchard - tél:+1.514.383.3801 - http://artengine.ca/matju | Freelance Digital Arts Engineer, Montréal QC Canada