bludragon Wrote: 
> optical vs coax:
> 
> http://www.audioholics.com/techtips/audioprinciples/interconnects/toslink.php
> 
> Strange that they spec toslink at such a low bandwidth (5-10 MHz) - I
> suspect, as I've read elsewhere too, that it would be the
> emitter/detector pair that imposes such a low bandwidth.  The upper
> limit of bandwith for the optical cable itself is, of course, the
> frequency of the light (10^14 Hz), but there are other factors, like
> the way light bounces around in the cable, smearing the pulse edges:
> 
> http://www.commspecial.com/fiberguide-print.htm
> 
> Still, it's measured in MHz/km!  And the lower limit they quote is a
> few MHz per km.  Given that toslink cables are a lot shorter than a km,
> even the worst cable, I would think, would handle very high frequencies
> (around 1GHz?).


-- 
LavaJoe
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