On Tuesday 17 February 2009 01:45:05 Fons Adriaensen wrote:
> On Tue, Feb 17, 2009 at 08:13:02AM +0100, Arnold Krille wrote:
> > But not only do they sync up to four AD-converters to get one channel
> > with 4GS/s (current state of the art is 8GS/s!), they also sync several
> > of these devices to act as one digital oscilloscope with multiple
> > channels. They do the syncing by 10MHz clock and somehow manage to
> > distribute the trigger event to all devices involved. Quite spooky and
> > lot of hf to deal with.
>
> Yep, 10 MHz is the standard for reference frequency
> distribution for lab instruments. Getting decent GHz
> clocks from that requires careful PLL design.
>
> Returning to the original matter: multiplexing AD/DA
> do exist of course, and they are the best solution
> if you require lots of low bandwidth channels.
>
> One reason you won't find many of them in pro audio
> is the channel isolation requirement (> 100 dB)
> - it would be very hard to make a fast analog
> multiplexer reaching anything near that figure.
>
> Ciao,
Thanks for all the advice and help on this issue folks. I really appreciate
it!
-- Bearcat M. Şandor Bearcat@feline-soul.net Jabber: bearcat@feline-soul.net MSN: bearcatsandor@hotmail.com Yahoo: bearcatsandor AIM: bearcatmsandor _______________________________________________ Linux-audio-user mailing list Linux-audio-user@lists.linuxaudio.org http://lists.linuxaudio.org/mailman/listinfo/linux-audio-userReceived on Wed Feb 18 00:15:01 2009
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