Remember

Remember

Tony, Steve;

Remember audio related jitter error happens at really low frequecies like below 10Hz or 1Hz. While yes this error will effect higher frequency content because they are made up of less samples. The over all jitter will tend to go up as the sample rate goes up.

As slider said this is the way most phase noise measurements are made.

It's actually pretty easy to see by looking at the phase noise of the bit clock coming out of the divider.

Now the big questions is does any of this matter? Really if you look at current DAC chips internally none of this matters. As they simply have what is called a Serial Input Module which takes the data input and outputs parallel samples and also give some indication of the current sample rate then the rest of the dac works off of parallel samples. Really with parts like this the Master Clock becomes the key to really true low jitter output.

Thanks
Gordon
J. Gordon Rankin

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Follow Ups Full Thread

Topic - Jitter vs sampling rate. - sbrians 12:47:26 07/27/12 (22)

RE: Jitter vs sampling rate. - 13th Duke of Wymbourne 17:55:26 07/31/12 (0)

These threads are awesome... - Tromatic 16:56:28 07/30/12 (10)

RE: These threads are awesome... - Todd Krieger 09:42:29 08/01/12 (8)

I don't think that makes any sense - bwb 14:03:34 08/02/12 (0)

Can that be done? - sbrians 12:55:53 08/01/12 (6)

Not Completely...... But........... - Todd Krieger 15:40:43 08/01/12 (5)

Actually... - audioengr 10:57:59 08/02/12 (4)

you're making a joke right? /nt - bwb 14:08:03 08/02/12 (3)

RE: you're making a joke right? /nt - Tony Lauck 21:29:53 08/02/12 (2)

RE: you're making a joke right? /nt - Crazy Dave 10:34:41 08/03/12 (0)

unfortunately we live in the real world - bwb 08:47:38 08/03/12 (0)

it is not really "something as fundamental as jitter" - bwb 06:49:18 07/31/12 (0)

RE: Jitter vs sampling rate. - Gordon Rankin 08:08:16 07/30/12 (7)

RE: Jitter vs sampling rate. - audioengr 10:20:58 07/30/12 (6)

Jitter is often expressed as a percentage of clock period ... - slider 11:27:25 07/30/12 (5)

RE: Jitter is often expressed as a percentage of clock period ... - audioengr 14:00:20 07/30/12 (4)

RE: Jitter is often expressed as a percentage of clock period ... - Tony Lauck 17:35:14 07/30/12 (2)

Remember - Gordon Rankin 07:28:12 07/31/12 (1)

RE: Remember - Tony Lauck 07:42:26 07/31/12 (0)

Agreed ... to an extent - slider 16:25:57 07/30/12 (0)

RE: Jitter vs sampling rate. - audioengr 10:39:58 07/28/12 (1)

RE: Jitter vs sampling rate. - Bromo33333 17:56:33 07/28/12 (0)

Follow Ups

Remember - Gordon Rankin 07:28:12 07/31/12 (1)

RE: Remember - Tony Lauck 07:42:26 07/31/12 (0)

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