Yep, usually crosstalk. The problem is that they've started to spec inter-pair crosstalk. That's why cat6 has the interior plastic spacer. Which gets cut out, the 3&6 pair gets split and the twists in the twisted pair are eliminated through the connector.
No modern high speed design engineer would use this connector for 10G if they had a choice. On Fri, Aug 18, 2023, 8:29 AM <ch...@go-mtc.com> wrote: > Yes, the splitting of 3&6 causes acres of trouble. But what does a good > PCB do if the jack causes the test to fail. I don’t recall which test it > is, but most jacks fail it. Might be a crosstalk. > > *From:* Forrest Christian (List Account) > *Sent:* Thursday, August 17, 2023 11:43 PM > *To:* AnimalFarm Microwave Users Group > *Cc:* Chuck McCown > *Subject:* Re: [AFMUG] Question for Chuck, and anyone wise who wants to > add their 0.02... > > Ahh, I quickly glanced online and somehow misread the gige as cat6. > Which is why I was confused. > > I've been neck deep in the 10 gig E spec for midspan injection off and on > for the last couple of months. Not a fun read or design. Considering > going to 6 or 8 layers so I can meet some of the specifications. (Three > ground planes with each pair being ran as a buried stripline). And don't > even get me started about how I feel the 568A/B pair arrangement has > outlived its usefulness. I'd like to see us move to an arrangement where > the pairs actually pass through the jack as pairs. > > > On Thu, Aug 17, 2023, 7:23 PM Chuck McCown via AF <af@af.afmug.com> wrote: > >> All CAT6 in our product line are 100% GDT. Anything that says GIGE has >> solid state and GDT. I would recommend CAT6 for everything. >> >> >> >> *From:* Forrest Christian (List Account) >> *Sent:* Thursday, August 17, 2023 6:22 PM >> *To:* AnimalFarm Microwave Users Group >> *Subject:* [AFMUG] Question for Chuck, and anyone wise who wants to add >> their 0.02... >> >> Which of the MTC CAT6 surge suppressors that fit in the APC racks are >> recommended for general use? >> >> I see a Gas discharge and semiconductor diode version on the website. >> Guessing the GDT version is more robust and less likely to cause errors at >> the expense of reaction time. >> >> ------------------------------ >> -- >> AF mailing list >> AF@af.afmug.com >> http://af.afmug.com/mailman/listinfo/af_af.afmug.com >> -- >> AF mailing list >> AF@af.afmug.com >> http://af.afmug.com/mailman/listinfo/af_af.afmug.com >> >
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