Go Back   Home > Forums > >
Home Forums Rules Articles diyAudio Store Blogs Gallery Wiki Register Donations FAQ Calendar Search Today's Posts Mark Forums Read

Digital Source Digital Players and Recorders: CD , SACD , Tape, Memory Card, etc.

About jitter.Help from a math guy
About jitter.Help from a math guy
Please consider donating to help us continue to serve you.

Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving
Reply
 
Thread Tools Search this Thread
Old 15th June 2010, 02:55 PM   #1
ailouros6 is offline ailouros6  Europe
diyAudio Member
 
Join Date: May 2008
Default 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
  Reply With Quote
Old 15th June 2010, 03:59 PM   #2
ailouros6 is offline ailouros6  Europe
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?
  Reply With Quote
Old 15th June 2010, 04:16 PM   #3
Allen Wright is offline Allen Wright  Switzerland
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
  Reply With Quote
Old 15th June 2010, 05:09 PM   #4
ailouros6 is offline ailouros6  Europe
diyAudio Member
 
Join Date: May 2008
Hello Allen
Thanks

A clock module ,using an HP Modulation Domain Analyzer

Any help with the math involved?
  Reply With Quote
Old 15th June 2010, 09:25 PM   #5
Allen Wright is offline Allen Wright  Switzerland
R.I.P.
 
Join Date: Dec 2001
Location: Schaffhausen Switzerland
Quote:
Originally Posted by ailouros6 View Post

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
  Reply With Quote
Old 15th June 2010, 10:06 PM   #6
ailouros6 is offline ailouros6  Europe
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
  Reply to this post

Reply


About jitter.Help from a math guyHide this!Advertise here!
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
generate jitter test signal and measurign jitter using AP2? BJAMR Digital Source 11 1st November 2010 02:07 PM
math problem ?? prorms Solid State 8 19th December 2006 08:48 PM
Can't do the math! poorstudent Full Range 3 22nd November 2005 06:37 AM
Need some Math Help... ctardi The Lounge 3 21st June 2005 05:11 PM
Data Jitter Versus Electrical Jitter? 300_baud Digital Source 8 16th July 2004 07:59 PM


New To Site? Need Help?

All times are GMT. The time now is 01:28 AM.


Search Engine Optimisation provided by DragonByte SEO (Pro) - vBulletin Mods & Addons Copyright © 2020 DragonByte Technologies Ltd.
Resources saved on this page: MySQL 15.79%
vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2020 DragonByte Technologies Ltd.
Copyright ©1999-2020 diyAudio
Wiki