To: t10@t10.org Subject: SAS-2 PHY WG conference call From: Alvin.Cox@seagate.com Date: Wed, 20 Sep 2006 10:55:38 -0500 X-Message-Number: 7245 Formatted message: HTML-formatted message Agenda: Let’s start working the PHY specification numbers now that training and SSC have been addressed. Reference proposals: Historical: http://www.t10.org/ftp/t10/document.06/06-053r0.pdf Recent: http://www.t10.org/ftp/t10/document.06/06-419r0.pdf From last week’s discussion of 06-419: Defines how de-emphasis is measured for the simulations in this proposal. Concern voiced that the de-emphasis measurement definition doesn't locate the peak in the correct position. It is dependent on rise and fall times. Maximum rise time needs to be no greater than .41 UI and the minimum rise time needs to be smaller. Also looks at deterministic jitter relationship to de-emphasis. Initial reference transmitter table does not include numbers for differential and common mode return loss. Differential RL suggested being similar to 10G Base-KR and the common mode RL similar, but -6dB and TBD frequency dependency. Differential impedance plus differential return loss should not both be in the reference receiver table. Suggested dropping differential impedance requirement (as is being done in another similar standard). Need to add jitter tolerance. Minimum number of taps should be 3 based on existing data and recommendation of 4 +/- 1 tap. Minimum values need to be used for the reference values. Kevin asked for suggestions as he has provided the initial pass at defining a reference transmitter and receiver. We also need to look at the 10-meter external cable requirement. Conference call September 21, 2006 PARTICIPANT INFORMATION: Toll Free Dial in Number: (866) 279-4742 International Access/Caller Paid Dial In Number: (309) 229-0118 PARTICIPANT CODE: 3243413 Webex information: https://seagate.webex.com/seagate Topic: SAS-2 PHY WG Date: Thursday, Sept 21, 2006 Time: 10:00 am, Central Daylight Time (GMT -05:00, Chicago) Meeting number: 826 515 680 Meeting password: 6gbpsSAS Alvin Cox Seagate Technology, LLC Tel 405-350-7424 Cell 405-206-4809 E-Mail alvin.cox@seagate.com