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. ŞandorBearcat@xxxxxxxxxxxxxxxxxxxxx: bearcat@xxxxxxxxxxxxxxxxxx: bearcatsandor@xxxxxxxxxxxxxxxx: bearcatsandorAIM: bearcatmsandor _______________________________________________Linux-audio-user mailing listLinux-audio-user@xxxxxxxxxxxxxxxxxxxxxxxx://lists.linuxaudio.org/mailman/listinfo/linux-audio-user
