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Hi Natalie, the only significant crosstalk could happen in case you are using both pairs of star quad cable (e.g. with link aggregation or with solutions simply using 2 pairs). Other
then that I agree. But if we can get such data now as well it would be recommended to do the measurement now as well with little overhead instead of maybe lot of overhead later. Gruß/Regards, Stefan Buntz Stefan Buntz Mercedes-Benz Cars Development, Daimler AG Group Research & Advanced Engineering Safeguarding Hard & Software
HPC: U059 – Dep.: RD/FEQ Phone: +49 731 505-2089
Mobil: +49 176 30 90 51 44
Fax: +49 711 305 216 45 95
E-Mail: stefan.buntz@xxxxxxxxxxx Address for visitors: Buildung 10 Room 3.2.022 Wilhelm-Runge-Str. 11 D-89081 Ulm Germany Von: NATALIE WIENCKOWSKI [mailto:nwienckowski@xxxxxxx]
Hi Stefan, We decided to just concentrate on the individual link segments for now. Well shielded cables will have little crosstalk except at the connectors. The link segment data
is enough for the PHY vendors to start with. Once we narrow down the suitable characteristics we can then get crosstalk measurements for suitable connectors and link segments. Natalie -------- Original message -------- From: Stefan Buntz <stefan.buntz@xxxxxxxxxxx>
Date: 6/1/17 7:53 PM (GMT-05:00)
Subject: [802.3_NGAUTO] AW: website update
Hi all, sorry not to be able to join the NGAUTO call yesterday as I am currently in Taiwan. I just reviewed the presented slides and I think this is very useful input. Thank you all for generating this! One question remains to me: In Natalie’s presentation you showed that you need 4-port data (s4p) for differential cables in linear scaling. I assume this is mostly easily doable with a 4-port network analyzer. Due to the also mentioned crosstalk I would like to know in which format this is needed? For crosstalk the setup would be a 8-port setup (if you e.g. use a shielded twisted quad cable). Does this need to be measured also with phase the same time (means a s8p file)? I assume this to be a little bit difficult, as it would need a 8-port network analyzer… Or is for crosstalk also a separate measurement sufficient just measuring the cross talk alone (passive termination of the unused terminals) – or is it even fine to have cross talk amplitude? Best Regards, Stefan Stefan Buntz Mercedes-Benz Cars Development, Daimler AG Group Research & Advanced Engineering Safeguarding Hard & Software
HPC: U059 – Dep.: RD/FEQ Phone: +49 731 505-2089
Mobil: +49 176 30 90 51 44
Fax: +49 711 305 216 45 95
E-Mail: stefan.buntz@xxxxxxxxxxx Address for visitors: Buildung 10 Room 3.2.022 Wilhelm-Runge-Str. 11 D-89081 Ulm Germany Von: George Zimmerman [mailto:george@xxxxxxxxxxxxxxxxxxxx]
All – the ad hoc area now contains the presentations from this morning’s ad hoc meeting, as well as draft minutes and the meeting output confirming measurement formats and link segment measurements desired. Thank you
all for a productive morning, even if it was last minute. George Zimmerman, Ph.D. President & Principal CME Consulting, Inc. Experts in Advanced PHYsical Communications 310-920-3860
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