In Reply to: Re: Jitter at what point in the chain? posted by Charles Hansen on March 4, 2007 at 08:12:00:
HowdyWhat? I'd take your supposed counter example as an example of why my statement is right!
Jitter is insidious and (perhaps until recently) most designers haven't taken it seriously enough.
Just because the clock originates at the DAC (which is the best topology IMO) doesn't mean that all incoming jitter is eliminated. I have the EMM Labs CDSD and DAC6e which also uses a DAC sourced clock, and therefore can skip the evils of the clock recovery PLLs, etc. Unfortunately I can still hear the differences that better mechanical isolation make for the transport as well as the differences in changing power cords on the transport. None of this invalidates my statement, the timing errors of the returning clock and data still have effects that we wished they didn't.
-Ted
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Follow Ups
- Re: Jitter at what point in the chain? - Ted Smith 08:31:53 03/04/07 (25)
- Re: Jitter at what point in the chain? - Charles Hansen 10:16:29 03/04/07 (24)
- Re: Jitter at what point in the chain? - Ted Smith 11:53:17 03/04/07 (23)
- Re: Jitter at what point in the chain? - Charles Hansen 12:37:58 03/04/07 (22)
- Re: Jitter at what point in the chain? - Ted Smith 12:42:49 03/04/07 (21)
- We are not connecting here - Charles Hansen 15:41:44 03/04/07 (9)
- Re: We are not connecting here - Ted Smith 16:06:11 03/04/07 (8)
- Re: We are not connecting here - Charles Hansen 16:50:26 03/04/07 (6)
- Secret Jitter Path - John Swenson 17:25:20 03/05/07 (0)
- Re: We are not connecting here - Ted Smith 17:03:28 03/04/07 (4)
- Re: We are not connecting here - Charles Hansen 18:56:57 03/04/07 (3)
- Re: We are not connecting here - Ted Smith 19:43:51 03/04/07 (2)
- Re: We are not connecting here - Charles Hansen 21:15:11 03/04/07 (1)
- Re: We are not connecting here - Ted Smith 21:35:44 03/04/07 (0)
- Well spotted! - Christine Tham 16:36:13 03/04/07 (0)
- Logic induced modulation and jitter - Christine Tham 13:34:36 03/04/07 (10)
- Here are some other random jitter related pages - Ted Smith 14:17:46 03/04/07 (7)
- This is not a bad link, and not too technical - Christine Tham 14:20:32 03/04/07 (6)
- Nobody seems to take jitter seriously unless there is math in the paper :) [nt] - Ted Smith 14:31:18 03/04/07 (5)
- A question - Christine Tham 15:01:57 03/04/07 (4)
- Re: A question - Ted Smith 15:10:07 03/04/07 (3)
- Re: A question - Christine Tham 15:26:26 03/04/07 (2)
- Re: A question - Ted Smith 16:13:26 03/04/07 (1)
- Hey, nobody said it was going to be easy - which is why I'm not volunteering to design it :-) (nt) - Christine Tham 16:21:06 03/04/07 (0)
- Yep - Ted Smith 13:48:53 03/04/07 (1)
- Re: Yep - Christine Tham 14:17:23 03/04/07 (0)