About jitter.Help from a math guy

[ailouros6]

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]

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]

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]

Hello Allen
Thanks

A clock module ,using an HP Modulation Domain Analyzer

Any help with the math involved?

 

[Allen Wright]

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]

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