MIL-STD-461 covers conducted emissions from 30 Hz to 10 MHz for dc power. For ac power, it is from twice the power frequency to 10 MHz. Not all programs cover the spectrum below 10 kHz. 10 kHz to 10 MHz is covered by all military project.
Radiated emissions are covered from 2 MHz to 18 GHz for all programs. Some Navy platforms and Army helicopters control radiated emissions (electric field) between 10 kHz and 2 MHz. Additionally, some programs control radiated magnetic emissions (at 7 cm) between 50 Hz to 100 KHz. Expecting that DEF-STAN-5941 is not terribly different. NATO STANAGS are coordinated with MIL-STDs. Ken Javor Phone: (256) 650-5261 > From: John Woodgate <[email protected]> > Date: Thu, 3 Feb 2011 18:24:38 +0000 > To: <[email protected]> > Subject: EMC spectrum 'gaps' > > 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]>
