[SI-LIST] Re: Difference between P-P Jitter & Tj
- From: jgfnolasco@xxxxxxxxx
- To: vinod ah <ah.vinod@xxxxxxxxx>
- Date: Fri, 06 Dec 2013 06:33:51 -0600
Eye width is UI-Tj(BER). Sigtest and oscilloscopes use the dual dirac method to
extrapolate Tj@BER. They dont actually measure it, especially for BER=10e-12.
Tj(BER) = 2*Qber*Rj+Dj.
Tj(pp) is not useful to calculate eye width due to the Rj distribution having
unbounded behavior.
Check this app note for additional details. You will find the values of Qber
here.
http://cp.literature.agilent.com/litweb/pdf/5989-3206EN.pdf
Thanks
Gabriel
On Dec 6, 2013 4:11 AM, vinod ah <ah.vinod@xxxxxxxxx> wrote:
>
> Hi all,
>
> I have basic query on jitter. In PCIE Tx electrical measurements,
> SIGTEST (post-processing tool from PCISIG) measures peak-peak jitter &
> Tj @ 1E-12. Both the measurements dont match precisely.
>
> So trying to understand, what's the difference in the 2 measurements
> and how is the eye width computed i.e. 1 UI - Tj or 1UI - P-P Jitter.
>
> Regards
> Vinod A H
> ------------------------------------------------------------------
> To unsubscribe from si-list:
> si-list-request@xxxxxxxxxxxxx with 'unsubscribe' in the Subject field
>
> or to administer your membership from a web page, go to:
> //www.freelists.org/webpage/si-list
>
> For help:
> si-list-request@xxxxxxxxxxxxx with 'help' in the Subject field
>
>
> List forum is accessible at:
> http://tech.groups.yahoo.com/group/si-list
>
> List archives are viewable at:
> //www.freelists.org/archives/si-list
>
> Old (prior to June 6, 2001) list archives are viewable at:
> http://www.qsl.net/wb6tpu
>
>
------------------------------------------------------------------
To unsubscribe from si-list:
si-list-request@xxxxxxxxxxxxx with 'unsubscribe' in the Subject field
or to administer your membership from a web page, go to:
//www.freelists.org/webpage/si-list
For help:
si-list-request@xxxxxxxxxxxxx with 'help' in the Subject field
List forum is accessible at:
http://tech.groups.yahoo.com/group/si-list
List archives are viewable at:
//www.freelists.org/archives/si-list
Old (prior to June 6, 2001) list archives are viewable at:
http://www.qsl.net/wb6tpu
Other related posts:
