Jan, Since this is an industrial machine application you may want to conceder using a better connector. After all, if there is a lot of vibration or if the environment is not office clean, the RJ45 may not be a good choice. For example we would never use it in a vehicle. In the automotive industry we use a FAKRA connector. It is a SMB connector with a plastic latching housing. Here is a link to the Huber and Suhner web site. They have great connector, but the price is a little high. There are lower cost vendors that can be found, but I like their parts. http://www.hubersuhner.com/hs-p-rf-con-gr-series-arc Best regards, John =20 --------------------------------------- The information in this email and attachments hereto may contain legally = privileged, proprietary or confidential information that is intended for = a particular recipient. If you are not the intended recipient(s), or the = employee or agent responsible for delivery of this message to the = intended recipient(s), you are hereby notified that any disclosure, = copying, distribution, retention or use of the contents of this e-mail = information is prohibited and may be unlawful. When addressed to Takata = customers or vendors, any information contained in this e-mail is = subject to the terms and conditions in the governing contract, if = applicable. If you have received this communication in error, please = immediately notify us by return e-mail, permanently delete any = electronic copies of this communication and destroy any paper copies. --------------------------------------- -----Original Message----- From: si-list-bounce@xxxxxxxxxxxxx [mailto:si-list-bounce@xxxxxxxxxxxxx] On Behalf Of jan.vercammen1@xxxxxxxx Sent: Friday, June 23, 2006 5:49 AM To: si-list@xxxxxxxxxxxxx Subject: [SI-LIST] cat 6 RJ45 jack for PCB si-list, I have a colleague who experiences problems with 660Mbit/s LVDS on a cat 6=20 S/STP=20 cable (stranded coaxial overall shield, differential pairs are foil=20 shielded). The cable is but 3m long. This LVDS chain is used in an industrial machine. One observes: works-->some bit-errors-->receiver cannot lock (for about=20 500-1000ns)--> relock but some -->bit errors-->works. The errors hard to or impossible to=20 reproduce on a test bench and they seem to occur at random.=20 We do not know the cause but we are trying to improve the quality of the LVDS chain, We use SER/DES 921224/921023 and they are terminated in 100ohm=20 (differentially). Crosstalk measurements have not been performed. After checking the connector we found it to be cat 5, it is specified for=20 NEXT to only 100MHz. The connector NEXT is much worse than the cable next, for example cable=20 NEXT is 90dB at 100MHz but only 40dB for the connector. Because the cable contains both transmit and receive we wonder if we need=20 to improve the connector. Currently we are using a Tyco RJ45 connector (partnumber=20 406549-1), which is cat 5. I searched the web but I find a large number of dstributors and Tyco does=20 not seem to offer cat 6 RJ 45 PCB jacks. My questions: -1- are category 6 PCB mounted RJ45 jacks common? -2- manufacturers?? -3- any experience to share? Thank you in advance, Jan Vercammen EMC/Signal Integrity Engineer ------------------------------------------------------------------ To unsubscribe from si-list: si-list-request@xxxxxxxxxxxxx with 'unsubscribe' in the Subject field or to administer your membership from a web page, go to: //www.freelists.org/webpage/si-list For help: si-list-request@xxxxxxxxxxxxx with 'help' in the Subject field List FAQ wiki page is located at: http://si-list.org/wiki/wiki.pl?Si-List_FAQ List technical documents are available at: http://www.si-list.org List archives are viewable at: =20 //www.freelists.org/archives/si-list or at our remote archives: http://groups.yahoo.com/group/si-list/messages Old (prior to June 6, 2001) list archives are viewable at: http://www.qsl.net/wb6tpu ------------------------------------------------------------------ To unsubscribe from si-list: si-list-request@xxxxxxxxxxxxx with 'unsubscribe' in the Subject field or to administer your membership from a web page, go to: //www.freelists.org/webpage/si-list For help: si-list-request@xxxxxxxxxxxxx with 'help' in the Subject field List FAQ wiki page is located at: http://si-list.org/wiki/wiki.pl?Si-List_FAQ List technical documents are available at: http://www.si-list.org List archives are viewable at: //www.freelists.org/archives/si-list or at our remote archives: http://groups.yahoo.com/group/si-list/messages Old (prior to June 6, 2001) list archives are viewable at: http://www.qsl.net/wb6tpu