There was a huge argument when the GHz tests were first introduced over whether the use of pulse modulation was justified. It seems that any differences from sine modulation are not large enough to matter, at least in some opinions.
From: Robert Dunkerley [mailto:robert.dunker...@s-a-m.com] Sent: Monday, May 23, 2016 8:08 AM To: EMC-PSTC@LISTSERV.IEEE.ORG Subject: Re: [PSES] EN 55035 / CISPR 35 Hi David, I would have thought they would keep it at the 80% 1kHz AM modulation, so potentially 30V/m CW calibration, then apply the modulation on the test run, to give 54V/m peaks? But as you said, pulse might make more sense as it replicates mobile phone/wifi devices better maybe. This would open up a lot of re-testing on products that comply with the current standards. Rob. From: Schaefer, David [mailto:dschae...@tuvam.com] Sent: 20 May 2016 16:45 To: EMC-PSTC@LISTSERV.IEEE.ORG <mailto:EMC-PSTC@LISTSERV.IEEE.ORG> Subject: Re: [PSES] EN 55035 / CISPR 35 There’s a separate question on CISPR 35 I would like answered – are they going to use pulse modulation for the spot frequencies? As Rob mentioned, the requirement could be up to 30 V/m. If you’re intended to use the normal AM modulation of IEC 61000-4-3, that’s up to 54 V/m during your calibration. Pulse modulation makes more sense, but it isn’t in the draft. David From: Robert Dunkerley [mailto:robert.dunker...@s-a-m.com] Sent: Friday, May 20, 2016 7:23 AM To: EMC-PSTC@LISTSERV.IEEE.ORG <mailto:EMC-PSTC@LISTSERV.IEEE.ORG> Subject: Re: [PSES] EN 55035 / CISPR 35 Hi John, So EN 55035 (CISPR 35) may not filter through to the OJ Harmonised list until end of 2019? Up until that point, it will be a combination of EN 55032 and either EN 55024, 55020 or 55103-2? Thanks, Regards Rob. From: John Woodgate [mailto:jmw1...@btinternet.com] Sent: 19 May 2016 13:16 To: Robert Dunkerley; EMC-PSTC@LISTSERV.IEEE.ORG <mailto:EMC-PSTC@LISTSERV.IEEE.ORG> Subject: RE: [PSES] EN 55035 / CISPR 35 It is most unlikely that 55035 will be brought into mandatory effect without at least 3 years transition. It appears that the CISPR FDIS is forecast for October 2016, and CENELEC will for sure need time to process it into an EN. With best wishes DESIGN IT IN! OOO – Own Opinions Only <http://www.jmwa.demon.co.uk/> www.jmwa.demon.co.uk J M Woodgate and Associates Rayleigh England From: Robert Dunkerley [mailto:robert.dunker...@s-a-m.com] Sent: Thursday, May 19, 2016 12:45 PM To: EMC-PSTC@LISTSERV.IEEE.ORG <mailto:EMC-PSTC@LISTSERV.IEEE.ORG> Subject: [PSES] EN 55035 / CISPR 35 Hi, I’m trying to plan ahead for the new EMC Standards coming in next year, in particular EN 55032 and EN 55035. With EN 55035 still in draft form, are we likely to see that become compulsory the same time EN 55032 does? (ie 5th March 2017?) In addition, do we know what the Radiated Immunity test changes are likely to be on the final version of the draft? I’ve seen that there is a new requirement for spot frequencies at 1.8GHz, 2.6GHz, 3.5GHz and 5GHz @ 3V/m. However, I have also seen talk of a ‘Protection Distance’ which could increase this 3V/m up to 30V/m. Best regards, Rob. _____ This email has been scanned for email related threats and delivered safely by Mimecast. For more information please visit http://www.mimecast.com _____ - ---------------------------------------------------------------- This message is from the IEEE Product Safety Engineering Society emc-pstc discussion list. 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