JohnSwenson;456536 Wrote: > In the touch the S/PDIF stream is reclocked by a low jitter flop fed > directly from the main clocks. The SB3 has the stream coming directly > from the FPGA. That almost certainly gives lower jitter on the touch > output. > > The SB3 has some EMI suppression devices on the output which messed up > the impedance characteristics significantly increasing reflections on > the cable, thus increasing jitter in the receiver of the DAC. The touch > does not have these. > > Both the touch and the SB3 have a separate "connector board" which is > only a two layer board. Maintaining proper impedance of the traces when > going from the multilayer main board to the double sided board was not > done very well on the SB3, it seems to have been done much better on the > touch. > > So all in all the touch has a very well done S/PDIF output with a fair > amount of effort put into preserving low jitter on its way to the DAC. > Its not using expensive parts or any special "magic bullet", just honest > good design and implementation with attention to the details. > > John S.
Thanks, John. Any best guess on how the Touch might compare to a Duet receiver? Is the SPDIF output on the receiver more like the SB3 or the Touch? -- ezkcdude There are 10 kind of people in the world - those who understand binary and those who don't. SHINYMETAL '*Site*' (http://www.ezdiyaudio.com)| '*RSS*' (http://www2.kumc.edu/students/ezamir/rss/ezdiyaudio.xml) |'*Forum*' (http://ezdiyaudio.informe.com) ------------------------------------------------------------------------ ezkcdude's Profile: http://forums.slimdevices.com/member.php?userid=2545 View this thread: http://forums.slimdevices.com/showthread.php?t=67649 _______________________________________________ Touch mailing list Touch@lists.slimdevices.com http://lists.slimdevices.com/mailman/listinfo/touch
