For the FCC as noted in the post, special equipment, that is the stuff needed to pass the test, must be supplied with the equipment with instructions for using it. For example, the ferrites originally mentioned. In the EU, this has been held to be too complicated for the common consumer and so the ferrites have to be installed on the equipment that needs them, which means a cable with ferrite being shipped with each unit. That might be enough motivation, to go fix the problem as many other posted have mentioned. A good test lab will have noted that in the test report. So any calling for the test report can see for themselves what is needed.
On Sunday, September 7, 2014 10:03 AM, Pat Lawler <[email protected]> wrote: > > >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 >[email protected] > > >On Thu, Sep 4, 2014 at 9:31 AM, Gary McInturff <[email protected]> >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:[email protected]] >>Sent: Thursday, September 04, 2014 12:46 AM >>To: [email protected] >>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 >><[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]> >> > - >---------------------------------------------------------------- > >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]> > > - ---------------------------------------------------------------- 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]>
