All, I was looking through sales ads for electronics equipment, and saw a Blu-Ray disc player from a major company that came with an HDMI cable.
In the past, I would have just considered this a convenience to the buyer, like including batteries for remote controls. Now, I'm wondering if the HDMI cable had ferrites, or came from a qualified vendor list of known-good cable manufacturers. If a company has to supply a cable to control emissions, does that fact need to be reinforced in the user's manual? For example, 'Use only supplied HDMI cable or equivalent', or 'Use only <company> brand products for best performance.' Pat Lawler plawl...@gmail.com On Thu, Sep 4, 2014 at 9:31 AM, Gary McInturff <gary.mcintu...@esterline.com > wrote: > Playing the devil advocate here only because I find this interesting and > I'm not advocating anything. Heck I'm probably just arguing for argument > sake. > > If all cables are not equal as Ghery and note and the > designer/manufacturer has knowledge of that don't the cables then become > special accessories in their own right? Under 15.27 c) They would not > normally be considered special accessory items under the definition > because they can be easily purchased at a multitude of locations. > 15.27 c) Accessory items that can be readily obtained from > multiple retail outlets are NOT (my emphasis) considered to be special > accessories ... > But given the knowledge of the designer/manufacturer that cables vary in > performance and not all cables were tested the only assurance they have > that the system will perform as intended is buy telling the consumer > exactly which cable they must use buy name and brand. But if they do that > then the cable isn't "readily obtained from multiple outlets" and is now by > definition a special accessory. Paragraph 15.27 says that "The party > responsible for the equipment, as detailed in ยง2.909 of this chapter, shall > ensure that these special accessories are provided with the equipment" So > now must the cable be provided? > > > Gmac > > -----Original Message----- > From: Pettit, Ghery [mailto:ghery.pet...@intel.com] > Sent: Thursday, September 04, 2014 12:46 AM > To: EMC-PSTC@LISTSERV.IEEE.ORG > Subject: Re: [PSES] FCC EMI Test and Ferrites on Cables > > You are highly unlikely to find the ferrite prayer beads at Best Buy. If > you don't specify which ones to get you have no idea what the result will > be. I think you are correct, the beads must be shipped with the product. > The right ones, to boot. > > Now, how does the designer know that he needs ferrite beads? My > experience has been that many (most?) HDMI cables do not have their shields > terminated properly, if at all. Once the shields are terminated correctly > problems go away. Could this be a better solution? > > Ghery S. Pettit > > - > ---------------------------------------------------------------- > 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 < > emc-p...@ieee.org> > > 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 <emcp...@radiusnorth.net> > Mike Cantwell <mcantw...@ieee.org> > > For policy questions, send mail to: > Jim Bacher: <j.bac...@ieee.org> > David Heald: <dhe...@gmail.com> > - ---------------------------------------------------------------- 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 <emc-p...@ieee.org> 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 <emcp...@radiusnorth.net> Mike Cantwell <mcantw...@ieee.org> For policy questions, send mail to: Jim Bacher: <j.bac...@ieee.org> David Heald: <dhe...@gmail.com>
