> Radiated emissions below 30 MHz. Over here in the USA, the FCC says:
§ 15.209 Radiated emission limits; general requirements. (a) Except as provided elsewhere in this subpart, the emissions from an intentional radiator shall not exceed the field strength levels specified in the following table: Frequency (MHz) Field strength (microvolts/meter) Measurement distance (meters) 0.009–0.490 2400/F(kHz) 300 0.490–1.705 24000/F(kHz) 30 1.705–30.0 30 30 30–88 100** 3 88–216 150** 3 216–960 200** 3 Above 960 500 3 And over on your side of the pond, it is EN 300 330. And military ref: http://www.multilek.ca/Specifications.htm Attitude is Mind over Matter. If you don't Mind, it doesn't Matter... This email has been displayed using 100% recycled electrons and 100% pure virgin photons. --- On Thu, 2/3/11, John Woodgate <[email protected]> wrote: > From: John Woodgate <[email protected]> > Subject: EMC spectrum 'gaps' > To: [email protected] > Date: Thursday, February 3, 2011, 1:24 PM > I am soon to do a presentation on the > gaps in the EMC spectrum, where there are no emission limits > for non-military products. These are: > > Conducted emissions from 105 Hz to 1995 Hz, excluding mains > harmonics; > > Conducted emissions 2.05 kHz to 9 kHz, and 9 kHz to 150 kHz > for most products; > > Radiated emissions below 30 MHz. > > Pressure to fill in these gaps has blown up for different > reasons more or less simultaneously in the last 6 months. > > The thing is, that the audience will include some experts > on military EMC standards, of which I know little. Are there > any military standards (US or European) for the above > emissions? > -- OOO - Own Opinions Only. Try www.jmwa.demon.co.uk and > www.isce.org.uk > John Woodgate, J M Woodgate and Associates, Rayleigh, Essex > UK > Plural: data, criteria, phenomena. Singular: datum > (different meaning: use > 'data element' for a single item), criterion, phenomenon. > 'Effect' is a noun, > 'affect' is a verb (except in psychiatry). > > - > ---------------------------------------------------------------- > 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://product-compliance.oc.ieee.org/ > Graphics (in well-used formats), large files, etc. can be > posted to that URL. > > 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://product-compliance.oc.ieee.org/ Graphics (in well-used formats), large files, etc. can be posted to that URL. 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]>
