Is it possible to use notch filters and measure rest of the frequencies? -----Original Message----- From: T.Sato [mailto:[email protected]] Sent: 25 July 2017 17:41 To: [email protected] Subject: Re: [PSES] application of CISPR 32 to EUTs with integrated radio transmitters
Hello members, Thanks all who responded. I hope CISPR makes this topic clear in near future. Regards, Tom -- Tomonori Sato <[email protected]> URL: http://t-sato.in.coocan.jp On Sat, 22 Jul 2017 03:10:27 +0900, "T.Sato" <[email protected]> wrote: > Hello members, > > I want to hear of your opinion - while emission measurement for CISPR 32, > integrated radio transmitters must transmitting? > > > Although the standard is not clear whether radio transmitter can be set off > in emission measurement, I believed we can set radio transmitter off, as: > > - CISPR 32 said "The radiated emission requirements in this standard are not > intended to be applicable to the intentional transmissions from a radio > transmitter as defined by the ITU, nor to any spurious emissions related to > these intentional transmissions." > > - If non-transmitter function of the equipment (such as CPU clock and > harmonics) generates emissions in the frequency band of the intentional > transmission of the transmitter (such as 2.4 to 2.5 GHz), I think we should > apply the emission limits as the emissions are not related to the intentional > transmissions. However, it is difficult to measure such emissions in presence > of the intentional transmission. > > - The standard says "Compliance can be shown by measuring the EUT's emissions > when operating its functions simultaneously, individually in turn, or any > combination thereof." So, even if emissions from the transmitter function > must also be considered in the standard, it should permissible to test > non-transmitter function of the equipment while transmitter is set off. > > - Then, if the transmitter function of the equipment is tested while all the > other functions are set off, all the emissions measured are those caused by > the transmitter. > > > However, I heard of strong opinions that the emission measurement must be run > while the integrated radio transmitter is transmitting, and all the emissions > in the frequency bands of intended transmissions and those harmonics should > be simply ignored. > > > What do you think about this? > > Regards, > Tom > > -- > Tomonori Sato <[email protected]> > URL: http://t-sato.in.coocan.jp > > - > ---------------------------------------------------------------- > This message is from the IEEE Product Safety Engineering Society emc-pstc > discussion list. 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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]>
