The only sure way to qualify an HDMI cable manufacturer is to dissect the connector - cable termination and check for pigtails.
https://interferencetechnology.com/hdmi-cables-emi/ <https://interferencetechnology.com/hdmi-cables-emi/> The article references some original investigations by Begey and Altland (DesignCon 2008). Cheers, Ken _______________________ I'm here to help you succeed! Feel free to call or email with any questions related to EMC or EMI troubleshooting - at no obligation. I'm always happy to help! Kenneth Wyatt Wyatt Technical Services LLC 56 Aspen Dr. Woodland Park, CO 80863 Phone: (719) 310-5418 Web Site <http://www.emc-seminars.com/> | Blog <https://design-4-emc.com/> The EMC Blog (EDN) <https://www.edn.com/electronics-blogs/4376432/The-EMC-Blog> Subscribe to Newsletter <http://www.emc-seminars.com/Newsletter/Newsletter.html> Connect with me on LinkedIn <https://www.linkedin.com/in/kennethwyatt/> > On Apr 28, 2021, at 12:45 PM, Larry K. Stillings > <[email protected]> wrote: > > L-Com seems to have a good understanding on how to construct HDMI cables with > 360 shields > > https://www.l-com.com/audio-video-hdmi-cable-assemblies > <https://www.l-com.com/audio-video-hdmi-cable-assemblies> > > Known problem for quite some time now > > > Larry K. Stillings > Compliance Worldwide, Inc. > Test Locally, Sell Globally and Launch Your Products Around the World! > FCC - Wireless - Telecom - CE Marking - International Approvals - Product > Safety > 357 Main Street > Sandown, NH 03873 > (603) 887 3903 Fax 887-6445 > complianceworldwide.com <https://complianceworldwide.com/> > > Follow us on social media > <image001.png> linkedin.com/company/compliance-worldwide-inc > <x-msg://50/linkedin.com/company/compliance-worldwide-inc> <image002.png> > twitter.com/complianceww <x-msg://50/twitter.com/complianceww> > Privileged/Confidential Information may be contained in this message. If you > are not the addressee indicated in this message (or responsible for delivery > of the message to such person), you may not copy or deliver this message to > anyone. In such case, you should destroy this message and kindly notify the > sender by reply email. Please advise immediately if you or your employer do > not consent to Internet email for messages of this kind. Opinions, > conclusions and other information in this message that do not relate to the > official business of my firm shall be understood as neither given nor > endorsed by it. > > From: Cass Carmanico > Sent: Wednesday, April 28, 2021 2:24 PM > To: [email protected] > Subject: [PSES] EMC/EMI Cables > > Hi guys, > > I am having issues with getting audio/video product to pass the class A > limit. I've narrowed it down to the HDMI cables. Even the ones with the > ferrites on both ends are inconsistent. > > Does anyone have a recommendation on where to find good EMI/EMC HDMI Cables. > > Thanks, > > Cass > ---------------------------------------------- > > This e-mail and any attachments may contain information that is confidential > to Ross Video. > > If you are not the intended recipient, please notify me immediately by > replying to this message. Please also delete all copies. Thank you. > - > ---------------------------------------------------------------- > This message is from the IEEE Product Safety Engineering Society emc-pstc > discussion list. To post a message to the list, send your e-mail to > <[email protected] <mailto:[email protected]>> > > All emc-pstc postings are archived and searchable on the web at: > http://www.ieee-pses.org/emc-pstc.html > <http://www.ieee-pses.org/emc-pstc.html> > Attachments are not permitted but the IEEE PSES Online Communities site at > http://product-compliance.oc.ieee.org/ > <http://product-compliance.oc.ieee.org/>can be used for graphics (in > well-used formats), large files, etc. > > Website: http://www.ieee-pses.org/ <http://www.ieee-pses.org/> > Instructions: http://www.ieee-pses.org/list.html (including how to > unsubscribe) <http://www.ieee-pses.org/list.html> > List rules: http://www.ieee-pses.org/listrules.html > <http://www.ieee-pses.org/listrules.html> > For help, send mail to the list administrators: > Scott Douglas <[email protected] <mailto:[email protected]>> > Mike Cantwell <[email protected] <mailto:[email protected]>> > > For policy questions, send mail to: > Jim Bacher <[email protected] <mailto:[email protected]>> > David Heald <[email protected] <mailto:[email protected]>> > > - > ---------------------------------------------------------------- > This message is from the IEEE Product Safety Engineering Society emc-pstc > discussion list. To post a message to the list, send your e-mail to > <[email protected] <mailto:[email protected]>> > > All emc-pstc postings are archived and searchable on the web at: > http://www.ieee-pses.org/emc-pstc.html > <http://www.ieee-pses.org/emc-pstc.html> > Attachments are not permitted but the IEEE PSES Online Communities site at > http://product-compliance.oc.ieee.org/ > <http://product-compliance.oc.ieee.org/>can be used for graphics (in > well-used formats), large files, etc. > > Website: http://www.ieee-pses.org/ <http://www.ieee-pses.org/> > Instructions: http://www.ieee-pses.org/list.html (including how to > unsubscribe) <http://www.ieee-pses.org/list.html> > List rules: http://www.ieee-pses.org/listrules.html > <http://www.ieee-pses.org/listrules.html> > For help, send mail to the list administrators: > Scott Douglas <[email protected] <mailto:[email protected]>> > Mike Cantwell <[email protected] <mailto:[email protected]>> > > For policy questions, send mail to: > Jim Bacher <[email protected] <mailto:[email protected]>> > David Heald <[email protected] <mailto:[email protected]>> > - ---------------------------------------------------------------- This message is from the IEEE Product Safety Engineering Society emc-pstc discussion list. To post a message to the list, send your e-mail to <[email protected]> All emc-pstc postings are archived and searchable on the web at: http://www.ieee-pses.org/emc-pstc.html Attachments are not permitted but the IEEE PSES Online Communities site at http://product-compliance.oc.ieee.org/ can be used for graphics (in well-used formats), large files, etc. Website: http://www.ieee-pses.org/ Instructions: http://www.ieee-pses.org/list.html (including how to unsubscribe) List rules: http://www.ieee-pses.org/listrules.html For help, send mail to the list administrators: Scott Douglas <[email protected]> Mike Cantwell <[email protected]> For policy questions, send mail to: Jim Bacher: <[email protected]> David Heald: <[email protected]>
