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Methodologies for Jitter and Signal Quality Specification - MJSQ
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T11.2 / Project 1316-DT/ Rev 12.2 January 30, 2004
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Working
Draft
T11.2 / Project 1316-DT/ Rev 12.2
January 30, 2004
Information Technology -
Fibre Channel - Methodologies for Jitter and Signal Quality Specifica-
tion - MJSQ
Draft Technical Report
Secretariat International Committee for Information Technology Standardization (INCITS)
This is a draft technical report of Accredited Standards Committee INCITS. As such, this is not a com-
pleted technical report. The T11.2 Technical Committee may modify this document as a result of com-
ments received during public review and its approval as a technical report.
Permission is granted to members of INCITS, its technical committees, and their associated task groups to
reproduce this document for the purposes of INCITS standardization activities without further permission,
provided this notice is included. All other rights are reserved. Any duplication for commercial or for-profit
use is prohibited.
ABSTRACT
This technical report enhances the jitter and signal specifications found in the Fibre Channel Physical layer
standards and in the technical report Methodologies for Jitter Specification (MJS). It provides extended
definitions and test methodologies to enable more effective execution of specifications relating to the
phase timing features of high speed serial signals. A generalization of jitter concepts to include events that
occur at other than the nominal receiver detection threshold provides a stronger coupling between the jitter
measured in a signal and the errors produced by the receiver of the signal. The methodologies described
use a structured approach to describe the tests that recognize the contributions from test fixtures, instru-
mentation and calibration schemes to the reported values. Application to speeds well in excess of the
existing 1,0625 GBd jitter specifications are considered.
Reference number
ISO/IEC ******: 200x
INCITS.*** - 200x
Contacts: Chairman: Technical Editor:
Dennis Peterich Bill Ham
Wavecrest Corp. HP
7626 Golden Triangle Drive 165 Dascomb Road
Eden Prairie, MN 55344 Andover, MA 01810
Voice: 952 646-0500 Voice: 978 828-9102
Fax:952 646-0501 Fax: 978 470-0321
email:dpetrich@wavecrest.com email: bill_ham@ix.netcom.com

PATENT STATEMENT
CAUTION: The developers of this technical report have requested that holder’s of patents that may be
required for the implementation of the technical report, disclose such patents to the publisher. However,
neither the developers nor the publisher have undertaken a patent search in order to identify which, if any,
patents may apply to this technical report.
As of the date of publication of this technical report and following calls for the identification of patents that
may be required for the implementation of the technical report, no such claims have been made. No further
patent search is conducted by the developer or the publisher in respect to any technical report it pro-
cesses. No representation is made or implied that licenses are not required to avoid infringement in the
use of this technical report.
Other Points of Contact:
T11.2 Chair: T11.2 Vice-Chair INCITS Secretariat, ITI
Schelto Van Doorn Edward L. Grivna
Intel Cypress Semiconductor
44235 Nobel Drive 2401 East 86th Street 1250 Eye Street, NW Suite 200
Fremont, CA.94538 Bloomington, MN 55425 Washington, DC 20005
voice: 510 497-7770 (952) 851-5046 202-737-8888
Fax: (952) 851-5087 202-638-4922
Email schelto.vandoorn@intel.com elg@cypress.com incits@itic.org
T11.2 Reflector (for minutes, agendas, etc.)
Internet addresses for subscription to the T11.2 reflector: Subscribe: t11_2-
request@mail.t11.org?subject=subscribe
Unsubscribe: t11_2-
request@mail.t11.org?subject=unsub-
scribe
Report Problem Address: t11_2-
admins@listserve.com
Internet address for distribution via T11.2 reflector: t11_2@mail.t11.org
Web Sites http://www.incits.org/t11or
http:// www.t11.org
Document Distribution
Global Engineering
15 Inverness Way East
Englewood, CO 80112-5704
Voice: 303-792-2181
or: 800-854-7179
FAX: 303-792-2192

Methodology for Jitter and Signal Quality Specification-MJSQ Technical Report REV 12.2, January 30,
Page i
Foreword (This foreword is not part of this technical report)
Requests for interpretation, suggestions for improvement and addenda, or defect reports are welcome.
They should be sent to the INCITS Secretariat, ITI, 1250 Eye Street, NW, Suite 200, Washington, DC
20005-3922.
This technical report was processed and approved for submittal to ANSI by National Committee for
Information Technology Standards (INCITS). Committee approval of this standard does not necessarily
imply that all committee members voted for approval. At the time it approved this technical report, INCITS
had the following members:
Karen Higginbottom, Chair
Russ Richards, Vice-chair
Monica Vago, Secretary
(INCITS Membership to be inserted)
T11.2 membership
Company Type Representatives
Agilent P Randy Clark
Agilent A Rob Dumbrille
Amphenol P Michael Wingard
Amphenol A Ron Kleckowski
Ancot P Jan V. Dedek
Ancot A Bart Raudebaugh
Broadcom P Ali Ghiasi
Broadcom A Kory Sefidvash
Brocade P Robert Snively
Corning Inc. P Doug Coleman
Corning Inc. A Steven E. Swanson
Crossroads Sys. P Rich Umberhocker
Crossroads Sys. A Bryan Schlinger
Cypress Semi P Edward Grivna
E2O P Dave Lewis
E2O A Tom Lindsay
EMC P Gregory McSorley
EMC A Chris Mulvey
Emulex Networks P Hossein Hashemi
Emulex Networks A Kamran Mansoori

Methodology for Jitter and Signal Quality Specification-MJSQ Technical Report REV 12.2, January 30,
Page ii
FCI P Kevin Oursler
FCI A Rodd Ruland
Hewlett Packard P Bill Ham
Hewlett Packard A Bruce Schober
IBM P Kevin Sherman
IBM A George Penokie
Infineon P Richard Johnson
Infineon A Vasanta Rao
Intel P Schelto van Doorn
Intel A Brad Booth
JDS P Eric Borisch
JDS A Kevin Demsky
LSI Logic P Michael Jenkins
LSI Logic A David Allen
LSI Logic A# Mark Marlett
Madison Cable P Andrew Nowak
Madison Cable A Jie Fan
Meritec P Ed Cady
Molex P Jay H. Neer
Molex A Steve Skiest
NetApp P Bob Davis
NetApp A Tony Aiello
NTT P Shin’ichi Iwano
NTT A Etsuji Sugita
NTT A# Osamu Ishida
PMC-SIERRA P Graeme Boyd
PMC-SIERRA A April Bergstrom
Primarion P Samir Desai
Primarion A Kannan Raj
QLogic P Dean Wallace
QLogic A Greg Casey
Seagate P Allen Kramer
Seagate A James Coomes
Smiths Aerospace P John Schroeder
STMICROELECTRONICS P Mike Jensen
T11.2 membership

Methodology for Jitter and Signal Quality Specification-MJSQ Technical Report REV 12.2, January 30,
Page iii
Introduction (This introduction foreword is not part of this technical report)
This document is an INCITS technical report on the definitions, measurement requirements, and allowed
values of jitter on FC links. MJSQ supersedes the previously published MJS technical report (NCITS
TR-25-1999). MJSQ represents a significant advance over MJS and obsoletes some concepts docu-
mented in MJS.
The motivation for creating this technical report is to compile and provide additional information beyond
that supplied in MJS to clarify and complete the jitter and signal quality specification clause of the FC-PHn
and FC-PI-n standard set. The existing jitter specifications are incomplete as a result of changes in how
the electronics industry is implementing Fibre Channel systems today compared to how systems were
expected to be implemented in the past. Examples of such changes are the increased interest in very
effective interoperability and margin specifications for SAN applications, increased interest in using adap-
tive or predictive compensation schemes implemented in active elements or ports, and higher speed at
longer distance.
The goals of this technical report are:
STMICROELECTRONICS A Roland Marbot
Stratos P Jesse Chin
Stratos A Luis Torres
Sun Microsystems P Vit Novak
Sun Microsystems A Steven Sletten
Tartan Technology P Rich Taborek
Tartan Technology A Arline Taborek
Tektronix P Mike Engbretson
Tektronix A Mark Guenther
Tektronix A# Ben Ward
Tyco P Bob Atkinson
Tyco A Michael Fogg
Velio P Haluk Aytac
Velio A Ramesh Senthinathan
Velio A# Ramin Farjad
Vixel P Roy Sebring
Vixel A Kim Gray
VOLEX P Michael Karg
Wavecrest P Dennis Petrich
Wavecrest A Layne Ihrke
Xyratex P Paul Levin
Xyratex A Neil Edmunds
T11.2 membership
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