| Thread Links | Date Links | ||||
|---|---|---|---|---|---|
| Thread Prev | Thread Next | Thread Index | Date Prev | Date Next | Date Index |
|
Hi, Jonathan, Do you suggest to apply this change to not only TDECQ measurement but also SECQ measurement? If so, I think this change will give higher stress to the stressed receiver conformance test signal. Is my understanding
correct? Best regards, ******************************************************** Akinori Hayakawa FUJITSU LABORATORIES LTD. Network System Laboratory Network Component Project 10-1, Morinosato-Wakamiya, Atsugi 243-0197, Japan TEL : +81-46-250-8251 FAX : +81-46-250-8274 E-mail :
hayakawa_aki@xxxxxxxxxxxxxx ******************************************************** From: Jonathan King [mailto:jonathan.king@xxxxxxxxxxx]
Dear colleagues, Please find attached a short presentation which I hope to review in the 802.3bs face to face meeting in Charlotte, and which describes a proposed change to the
TDECQ method which will allow TDECQ to be calculated at the optimum eye timing point, by allowing the histogram time positions to be adjusted for optimum TDECQ. This change would reflect the capabilities of real world implementations of receivers with T
spaced and T /2 spaced equalizers. Without this change, the TDECQ definition in the current draft (802.3 D3.3) means that transmitters with equalized eyes which are offset from the time centre
of the eye are penalized with higher TDECQ, which would contribute to the decorrelation of Tx TDECQ and measured link performance.
I believe the change is absolutely necessary to prevent unnecessary transmitter TDECQ failures.
If you are willing to be a supporter of this proposed change please send me an e-mail to let me know your name and affiliation. Feel free to ask questions of course! Best wishes Jonathan King |