That's what bit me, an included radio. TCB wanted data from 32 kHz to 12 GHz. Easier than debating.
________________________________ From: Cortland Richmond <[email protected]> To: [email protected] Sent: Friday, July 6, 2012 7:25 AM Subject: Re: FCC maximum frequency measurement From FCC Part 15, § 15.33 Frequency range of radiated measurements. (1) Except as otherwise indicated in paragraphs (b)(2) or (b)(3) of this section,for an unintentional radiator, including a digital device, the spectrum shall be investigated from the lowest radio frequency signal generated or used in the device, without going below the lowest frequency for which a radiated emission limit is specified, up to the frequency shown in the following table: Highest frequency generated or used in the device or on which the device operates or tunes (MHz) Upper frequency of measurement range (MHz) Below 1.705 30. 1.705–108 1000. 108–500 2000. 500–1000 5000. Above 1000 5th harmonic of the highest frequency or 40 GHz, whichever is lower. (emphasis added) Since Part 15 requires no radiated test for digital devices below 30 MHz there's no need to test real-time clocks at their fundamental frequency. Cortland Richmond On 7/5/2012 1112, Mcburney, Ian wrote: >Dear Colleagues; > >I am trying to establish the maximum measurement frequency for radiated >emissions for a digital device that is an unintentional radiator (part 15). >Is it set by the highest frequency generated internally in a microprocessor or >DSP or is it the maximum frequency that is tracked “chip to chip” on a PCB. >Some of our components have high frequency internal clocking relative to PCB >tracked clocking. > >Thank you in advance > >Ian McBurney >Design Engineer > >Allen & Heath Ltd >Kernick Industrial Estate >Penryn, Cornwall >TR10 9LU >United Kingdom > > - ---------------------------------------------------------------- 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://listserv.ieee.org/request/user-guide.html 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://listserv.ieee.org/request/user-guide.html 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]>
