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AR# 35548

12.1 Clocking Wizard - How to convert jitter from ps to Unit Interval (UI)

Description

12.1 Clocking Wizard requires the jitter to be entered inUnit Interval (UI).

How do you convert from ps to UI?

Solution

To convert from ps to unit interval, divide the jitter by period

Example 1:

100 MHz (10 ns), 50 ps of jitter
50 ps/10 ns = 0.005 Good

Example 2:

160 MHz (6.25 ns), 130 ps of jitter
130 ps/6.25 ns = 0.0208

Linked Answer Records

Associated Answer Records

Answer Number Answer Title Version Found Version Resolved
32062 10.1i Architecture Wizard - PLL REF_JITTER value set in ps converts to incorrect unit interval value N/A N/A
AR# 35548
Date Created 10/28/2010
Last Updated 12/15/2012
Status Active
Type General Article
Devices
  • Virtex-6 CXT
  • Virtex-6 HXT
  • Virtex-6 LX
  • More
  • Virtex-6 LXT
  • Virtex-6 SXT
  • Virtex-5 FXT
  • Virtex-5 LX
  • Virtex-5 LXT
  • Virtex-5 SXT
  • Virtex-5 TXT
  • Virtex-5Q
  • Virtex-5QV
  • Virtex-4 FX
  • Virtex-4 LX
  • Virtex-4 QPro/R
  • Virtex-4 SX
  • Spartan-6 LX
  • Spartan-6 LXT
  • Less
Tools
  • ISE Design Suite - 12.1
IP
  • Clock Generator