Correct typos. Hit SEND too soon. RE101 (magnetic emissions) is 30 Hz to 100 kHz (not 50 Hz). Radiated emission control from either 10 kHz to 30 MHz or 2-30 MHz is electric field only (1.04 meter whip). Ken Javor
Phone: (256) 650-5261 > From: Ken Javor <[email protected]> > Date: Thu, 03 Feb 2011 12:57:14 -0600 > To: John Woodgate <[email protected]>, Untitled <[email protected]> > Conversation: EMC spectrum 'gaps' > Subject: Re: EMC spectrum 'gaps' > > 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]> - ---------------------------------------------------------------- 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]>
