[time-nuts] Calculating phase jitter from phase noise - appnote by silabs

SAIDJACK at aol.com SAIDJACK at aol.com
Fri May 11 19:02:00 UTC 2012


Hi,
 
here is a very nice and easy to use online calculator for doing exactly  
this:
 
_http://jittertime.com/resources/pncalc.shtml_ 
(http://jittertime.com/resources/pncalc.shtml) 
 
bye,
Said
 
 
In a message dated 5/11/2012 09:17:30 Pacific Daylight Time, lists at rtty.us  
writes:

Hi

Be very careful with all these phase noise to jitter  conversions. They make
some assumptions about the "noise" that are likely  true, but may not be. 
The
gotcha is that a normal noise measurement does  not take phase data. Without
the phase data you really can't properly do  the reconstruction. You have to
assume that it's random in the phase  domain. 

Bob

-----Original Message-----
From:  time-nuts-bounces at febo.com [mailto:time-nuts-bounces at febo.com] On
Behalf Of  Azelio Boriani
Sent: Friday, May 11, 2012 11:28 AM
To: Discussion of  precise time and frequency measurement
Subject: Re: [time-nuts] Calculating  phase jitter from phase noise - 
appnote
by silabs

And one from  HP/Agilent (taking into account the "colored noise"  too:

http://cp.literature.agilent.com/litweb/pdf/5990-3108EN.pdf

And  one from Fordahl, with the random zero cross  consideration:

http://www.metatech.com.tw/doc/appnote-fordahl/e-AN-02-3.pdf

On  Fri, May 11, 2012 at 4:00 PM, Jim Lux <jimlux at earthlink.net>  wrote:




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