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

Re: [BP] ATTN: Magesh - Broadcom simulation results


Thanks Magesh.  Could you clarify what amount of DCD you're applying for the xtlk BER results?  Your table indications "DCD = 0.05UIpp (eye closure = 0.025UIpp)".  Which is it?  The spec calls for up to 0.05UIpp closure.  Based on the following line where you state "DJ at package output, excluding DCD = 0.105UIpp" and that your TJ = 0.28UIpp and RJ = 0.15UIpp it would appear that the amount of DCD you're applying is 0.025UIpp.  That by the way is half what I apply, which would essentially explain why you're not seeing the same level of impact I am.


Thanks,        Joe


Joe Abler                                                             abler@us.ibm.com
IBM Systems & Technology Group            919-254-0573
High Speed Serial Link Solutions               919-254-9616 (fax)
3039 Cornwallis Road                                                                
Research Triangle Park, NC  27709


Magesh Valliappan <mageshv@BROADCOM.COM>

05/08/2006 01:48 PM
Please respond to Magesh Valliappan

       
        To:        STDS-802-3-BLADE@listserv.ieee.org
        cc:        
        Subject:        Re: [BP] ATTN: Magesh - Broadcom simulation results





I have  updated the presentations with clarifications on simulation conditions and  attached them to this email.
The  transmitter conditions in both are based on the latest version of the 802.3ap  draft and Charles' email
regarding EIT simulations. The receiver  conditions are similar to what I have presented at the last  meeting.

 
Magesh
 


From: Joe M Abler [mailto:abler@US.IBM.COM]  
Sent: Friday, May 05, 2006 5:52 PM
To:  STDS-802-3-BLADE@listserv.ieee.org
Subject: [BP] ATTN: Magesh -  Broadcom simulation results


Hi Magesh,
I'm trying to compare some of your simulation results  with mine but can't get too far because I don't have sufficient information on  your simulation conditions.  You put some very basic information in your  presentations such as launch voltage and rise time, but I'd appreciate it if  you could provide additional information on your assumptions for jitter (Tx  & Rx breakdown including DCD), termination values, clock offset, data  pattern type, random noise level, any accounting for CDR algorithm, etc.   I'm currently looking at your last presentation villiappan_c2_0506 and  would appreciate if you could send me the conditions for those results.   More generally though, I'd like to recommend that you update your other  presentations with such information and perhaps ask Adam to repost them.   Anyone trying to reference these in the future really wouldn't get full  benefit fro! m them without knowing the conditions behind them.nt>  


Thanks,         Joe


Joe Abler                                                                abler@us.ibm.com
IBM Systems & Technology Group             919-254-0573
High Speed Serial Link  Solutions               919-254-9616  (fax)
3039 Cornwallis Road                                                                   
Research Triangle Park, NC   27709



#### kr_xtlk_ber.pdf has been removed from this note on May 08, 2006 by Joe M Abler
#### eit_sim_results.pdf has been removed from this note on May 08, 2006 by Joe M Abler