About jitter.Help from a math guy

ailouros6 · 15th June 2010, 02:55 PM

Hello guys.I need some help about some jitter measurements from anyone who is good with statistics.

Say we have a clock with 11.000.000Hz mean center frequency,and on the 68% probability window we have +- 0,5Hz Standard dev.

how can we express this in picosecond RMS?

Thanks

SD

ailouros6 · 15th June 2010, 03:59 PM

Let me rephrase,with an example.

Say,at 99,9% prob ,ie 12,18 BER,i have a ~0,3Hzpp deviation at 11,280000Hz mean

If this gives out 0.00236psec_pp,then will this give us 0.0287psec_rms?

Allen Wright · 15th June 2010, 04:16 PM

What on earth instrumentation are you using to get these numbers? And what are you measuring? A clock oscillator or a complete player - or what?

Or is it just all theoretical?

Regards, Allen

ailouros6 · 15th June 2010, 05:09 PM

Hello Allen
Thanks

A clock module ,using an HP Modulation Domain Analyzer

Any help with the math involved?

Allen Wright · 15th June 2010, 09:25 PM

Quote:

Originally Posted by ailouros6

Any help with the math involved?

Are you kidding?

But being familiar with a lot of HP gear, but not the piece you are using, I'd just suggest you cuddle up with the manual, I'm sure it's all in there.

Regards, Allen

ailouros6 · 15th June 2010, 10:06 PM

Thanks Allen

Lots of info and application notes from HP.
Unfortunately ,i am not kidding about the math

I want the most accurate,yet fast way to go from the frequency to the time domain,that is from the standard deviation in Hz to psec_rms ,and i am quite rusty on these stuff.

Thanks again

Regards

Stavros

15th June 2010, 02:55 PM	#1
ailouros6 diyAudio Member Join Date: May 2008	About jitter.Help from a math guy Hello guys.I need some help about some jitter measurements from anyone who is good with statistics. Say we have a clock with 11.000.000Hz mean center frequency,and on the 68% probability window we have +- 0,5Hz Standard dev. how can we express this in picosecond RMS? Thanks SD

15th June 2010, 10:06 PM	#6
ailouros6 diyAudio Member Join Date: May 2008	Thanks Allen Lots of info and application notes from HP. Unfortunately ,i am not kidding about the mathI want the most accurate,yet fast way to go from the frequency to the time domain,that is from the standard deviation in Hz to psec_rms ,and i am quite rusty on these stuff. Thanks again Regards Stavros

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15th June 2010, 03:59 PM	#2
ailouros6 diyAudio Member Join Date: May 2008	Let me rephrase,with an example. Say,at 99,9% prob ,ie 12,18 BER,i have a ~0,3Hzpp deviation at 11,280000Hz mean If this gives out 0.00236psec_pp,then will this give us 0.0287psec_rms?

15th June 2010, 04:16 PM	#3
Allen Wright R.I.P. Join Date: Dec 2001 Location: Schaffhausen Switzerland	What on earth instrumentation are you using to get these numbers? And what are you measuring? A clock oscillator or a complete player - or what? Or is it just all theoretical? Regards, Allen

15th June 2010, 05:09 PM	#4
ailouros6 diyAudio Member Join Date: May 2008	Hello Allen Thanks A clock module ,using an HP Modulation Domain Analyzer Any help with the math involved?

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