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 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