Thread Links Date Links
Thread Prev Thread Next Thread Index Date Prev Date Next Date Index

XAUI Jitter Agenda 21st Febuary



XAUI Jitter Agenda 21st Febuary

XAUI Jitter Telco
21st Febuary 2001
10:30 (PST)
19:30 (CET)
Duration 90mins
Outside US : +1 865 5253200
Inside US  :    800 8919585
Participant Code : 674 870
Lines : 15 


Goal for today´s telco, is to agree on the comments to be entered for
the D2.1. 

Current comment and open issue list attached.

Participation list is also attached, please email me if you wish to
attend and your email address is not included.


Thanks for you participation.

Anthony Sanders
Principal Engineer
Infineon Technologies
Munich, Germany.
XAUI Jitter Agenda

21th Febuary 2001


0. Current comments to D2.1 

Issue Section	Page	section		line	type	comment					proposal
-------------	----	-------		----	----	-------					--------

2.5.3		279	47.3.3		40	Tech	100 ohm load is under-specified		+/-5% (>30 dB RL to 2.5 GHz)
4.6		281	47.3.3.4	3	Tech	10 dB RL is excessively restrictive	TBD
		281	47.3.3.5	24	Tech	Excessively restrictive to spec to DC	TBD
4.7		281	47.3.3.5	29	Tech	100 kHz limit on group delay too low	TBD
?		281	47.3.3.5	11	Tech	Far-end Jitter components underdefined	TJ<=0.60UI, DJ<=0.36UI. 
												Add "Jitter" section 47.3.3.x and add to table 47-2.
3.2, 3.3	281	47.3.3.5	31	Tech	Near-end Jitter components underdefined	TJ<=0.35UI, DJ<=0.18UI. RJ rolls off at -20 dB/dec above TBD MHz.
10		283	47.3.3.5	2	Tech	Min amplitude of template OK?		TBD
4.6		284	47.3.4.3	34	Tech	10 dB RL is excessively restrictive	TBD
3.3		284	47.3.4.4	45	Tech	Spectrum of RJ unconstrained		RJ rolls off from max at -20 dB/dec above TBD MHz.
1.2		285	47.3.4.4	3	Tech	Low freq break should accomodate packet	Change lower corner in figure 47-8 from 
												125 kHz and 1.5 UI to 22.1 kHz and 8.5 UI.
		286	47.4.1		12	Tech	Annex.48B.X not referenced fully	TBD (Same applies to lines 16, 19 and 24.)
		286	47.4.1		15	Tech	Table x.x not referenced fully		TBD
		286	47.4.1		17	Tech	"combined ... filter" not clear		TBD
6.4.1		286	47.4.1		27	Tech	CJPAT suitability for transmiter	TBD
2.5.3		286	47.4.1.1	33	Tech	Termination undefined			Reference 47.3.3 for termination in 47.4.1. 
												Remove 47.4.1.1 and editors' note.
2.5.4		286	47.4.1.2	38	Tech	Eye undefined				TBD to define eye. Remove editors' note.

                277	47.1.2		22	c Edit	7 cm implies excessive accuracy		Change "7 cm" to "10 cm".
		278	47.2		8	c Edit	"Table" should not be capitalized	Change "Table" to "table".
		278	47.2		16	c Edit	Editors' note no longer needed		Remove editors' note.
		279	47.3.3		40	c Edit	"Table" should not be capitalized	Change "Table" to "table".
		280	47.3.3.3	30	c Edit	CM RL of 5 dB disagrees with text	Change "5" to "6".
		281	47.3.3.5	11	c Edit	"Table" and "Figure" shouldn't be cap.	Chance to lower case.
		281	47.3.3.5	17	Edit	"transmission magnitude" is ackward	Change to TBD throughout document.
		281	47.3.3.5	17	c Edit	First occurance of "ISI" unclear	Replace "ISI" with "intersymbol interference (ISI)".
		282	47.3.3.5	38	c Edit	Figure 47-6 confusing			Move x-axis to bottom of template.
		283	47.3.4		39	c Edit	Editors' note no longer needed		Remove editors' note.
		283	47.3.4		36	c Edit	"Table" should not be capitalized	Change "Table" to "table"
		284	47.3.4.4	42	c Edit	"Table" should not be capitalized	Change "Table" to "table".
		284	47.3.4.4	45	c Edit	Gaussina discussion inappropriate	Remove "Assuming a Guassian ... 5.5 ps RMS."
		286	47.4.1		28	c Edit	Space mising between "XAUI" and "shall"	Add space.


------------------------------------------------------------


1.1 Break frequencies and amplitudes
  
  A- Find FC white paper on investigation leading to SWAG number of
  0.1UI and 1.5UI for amplitudes. (Allan) This action point shall be
  closed upon studying of the Bell Labs document.

1.2 Very low frequency jitter definition frequency and amplitude

  A- Comment to be entered

2.5.1 Annex 48B

  A- An additional Annex shall be written to cover methodology

2.5.3 Termination Section

  A- Comment to be entered

2.5.4 Receive Compliance Data Eye

    Receive eye needs to be shown with and without sinusoidal jitter.

    A- Suggestion to be entered to reflector (Anthony)

3.2 Transmit jitter

    A- Comment to be entered

3.3 Random Jitter

  Dawson bought the subject of bandlimiting the random jitter
  definition for the transmitter.

  A- Comments and further discussion required.

4.4 FEXT/NEXT (Cross Talk)

  A- Crosstalking specifications from typical connectors to be
  collected from connector manufacturers by Rich and Ali.

  A- Theoritical simulation of expected differential crosstalk to be
  done (Anthony)

4.6 Return Loss

  A- ("Ishwar Hosagrahar" <ishwarh@xxxxxx>) to take over action of
  providing nformation concerning this requirement.
  - Perhaps RL for receiver should be left at 10dB.

  - Comment from Ron Miller. (see below)

      ************************************************************
      Hi anthony
      
      I just got back from boston so could not join your concall.
      
      However, when I read your agenda my hair stood on end. 8 db
      should
      not be a consideratiopn for Return loss.
      
      If it should be changed it should be tightened up to 18 db and
      should cover the frequency band from 200 Mhz to 10 Ghz.  If
      anyone makes equipment that poor(8db) I can assure you that all
      the other system specs will be violated with 10E-12 ber
      available only for inch length traces. There are some real bad
      trade-offs here.
      
      Please post this for comments.
      
      Ron Miller
      ************************************************************


4.7 Group Delay of Channel

  - New low frequency limit and amplitude of group delay specification
  from Compliance Group.

  A- Must be discussed at next Telco.


4.8 S11 for channel definition

  A- Should we have a S11 defined for the channel. To be discussed in
  next Telco.


6.4 Defined patterns 

  A- Final acceptance of proposed pattern.

  A- It was requested that Rich could possibly explain how the
  compliance pattern can be generated from MAC.

6.4.1 Compliance Definition

    A- Adhoc to agree on use of CJPAT for transmit and receive
    compliance testing


10. Overall Verification of Jitter Budget

  A- Ongoing simulations for verification of newly proposed jitter
  numbers and patterns are ongoing by
    - Jeff Cain 
    - Tom Gray 
    - IFX 
      - See below
    - Mysticom
      - See below
    - Jeff Porter 
      - No resources available
    - Dawson



Ali Ghiasi <aghiasi@xxxxxxxxxxxxx>, 
Anthony.sanders@xxxxxxxxxxxx <anthony.sanders@xxxxxxxxxxxx>,
Adam Healey <ahealey@xxxxxxxxxx>, 
Bijit Patel <bijit_patel@xxxxxxxxxxxxxx>,
Bob Smith <robert@xxxxxxxxxxxxxx>, 
Dennis Petrich <dpetrich@xxxxxxxxxxxxx>,
Jeff Cain <jcain@xxxxxxxxx>, 
Jeff Porter <j.porter@xxxxxxxxxxxx>,
Jim Hesson <jhesson@xxxxxxxxxxxxxx>, 
John Wright <john.wright@xxxxxxxxx>,
Mike Jenkins <jenkins@xxxxxxxx>,
Peter Dartnell <dartnell@xxxxxxxxxxxxxxxxxx>, 
Richard Dugan <richard_dugan@xxxxxxxxxxx>, 
Robbie Shergill <robbie.shergill@xxxxxxx>,
Ron Miller <rmiller@xxxxxxxxxxx>, 
Schelto vanDoorn <schelto@xxxxxxx>, 
Shawn Rogers <s-rogers@xxxxxx>,
Leo Wong <lwong@xxxxxxxxxxxxxxx>,
Jason Chen <jchen@xxxxxxxxxxxxxxx>, 
Kesling Dawson W <dawson.w.kesling@xxxxxxxxx>, 
Allan Liu <allan_liu@xxxxxxxxxxx>, 
Tord Haulin <tord.haulin@xxxxxxxxxxxxx>, 
Tom Lindsay <Tom.Lindsay@xxxxxxxxx>
Rich Taborek <rtaborek@xxxxxxxxxxx>,
Doug.Day@xxxxxxxxxxxxxxxx,
"Ishwar Hosagrahar" <ishwarh@xxxxxx>,
Frank Barber <Frank_Barber@xxxxxxxxxxxxxx>,
Joel Dedrick <Joel_Dedrick@xxxxxxxxxxxxxx>,
Farzin Firoozmand <Farzin_Firoozmand@xxxxxxxxxxxxxx>