Thanks Ken, Yes, 25 dBuV/m not 25 uV/m. I also found the test set up rather strange. Certainly not consistent with CISPR but then the aircraft environment is entirely different than most other equipment installations. I agree, this makes it hard to compare to CISPR testing. We may have over simplified the requirements for aircraft installations. I will take another look at this. Any other information would be very helpful to the IEC working group. Thanks.
Jim -----Original Message----- From: Ken Javor [mailto:ken.ja...@emccompliance.com] Sent: Tuesday, October 29, 2002 9:16 AM To: Jim Conrad; m.bushn...@ieee.org; emc-p...@majordomo.ieee.org Cc: Jim Conrad Subject: Re: RTCA document vs. IEC 60601-1-02 I think you mean 25 dBuV/m, but regardless of the number, it is not a direct comparison to CISPR because a) the DO-160 EUT-antenna separation is 1 meter, not 3 or 10 meters, and b) the test is performed without an antenna height search, and c) the EUT is fastened to a metallic ground plane, and EUT-attached cables are mounted directly above the ground plane, which reduces emissions relative to a CISPR test set up. ---------- >From: "Jim Conrad" <jc...@shore.net> >To: <m.bushn...@ieee.org>, <emc-p...@majordomo.ieee.org> >Cc: "Jim Conrad" <jc...@shore.net> >Subject: RE: RTCA document vs. IEC 60601-1-02 >Date: Tue, Oct 29, 2002, 6:48 AM > > > I'm not sure if DO-199 or 233 has EMC requirements but I am very > interested if you come with any. IEC 62A/MT 23 is in the process of > amending 60601-1-2 for medical equipment used in the aircraft > environment. We have based our requirements on the environment > specified in DO-160. In general, the DO-160 requirement for RE are > higher than CISPR except in the communications and navigation > frequency bands. For example, RE dips to 25 uV/m in the 100 - 150 > MHz band for category II equipment. Please let me know if you find > anything in DO-233 that might alter our assumptions. Thanks. > > Jim > > -----Original Message----- > From: owner-emc-p...@majordomo.ieee.org > [mailto:owner-emc-p...@majordomo.ieee.org]On Behalf Of > m.bushn...@ieee.org > Sent: Monday, October 28, 2002 4:28 PM > To: emc-p...@majordomo.ieee.org > Subject: RE: RTCA document vs. IEC 60601-1-02 > > > Late reply: > I have not looked at DO-199, but I noticed that RTCA also has the > following > document: > DO-233 Issued: 08/20/1996 > Description: This document addresses the potential interference to > installed > aircraft electrical and electronic systems from Portable Electronic > Devices > (PEDs) carried aboard by passengers. It defines the potential > interference > phenomena; outlines the risk potential from interference events; > provides test > methods to determine whether or not a potential for interference > exists for > certain PEDs, aircraft and combinations thereof; and addresses > acceptable > levels of interference. The report also recommends modification of > Federal > Aviation Regulation 91.21, continued PEDs testing to identify and > better define > the possibility of interference to aircraft electronic systems, > increased > public awareness of the potential for interference from PEDs, and > the > development and use of devices to detect spurious PEDs emissions. > > FYI, here is the descriptions for DO-199 Volumes I and II: > DO-199 Issued: 09/16/1988 > Description: Reports on the investigation to determine potential > interference > effects to aircraft electronic systems due to emissions from > self-powered > portable electronic and electrical devices operated aboard aircraft. > Recommends > regulatory actions relating to operation and identification of > passenger- > operated devices to assure control of possible sources of > interference, and > recommends standardized procedures for reporting suspected > interference. Volume > I is the basic report and includes background, data collection, data > analysis, > conclusions and recommendations. Volume II provides amplification or > background > material for some of the summary data included in the basic report. > Superseded > DO-119 > > Sincerely, > Mark E. Bushnell, Technical Writer IEEE EMC P299 WG > m.bushn...@ieee.org > L-3 communications Integrated Systems, Greenville, Texas > Tel. 903.457.6375 Fax 903.457.4413 > This message is printed on 100% recycled electrons. > ________________________________________________ > ---------- > From: Ron[SMTP:r...@vascor.com] > Reply To: Ron > Sent: Friday, September 13, 2002 01:58 PM > To: EMC > Subject: RTCA document vs. IEC 60601-1-02 > > > I recently came across a synopsis of document DO-199, "Potential > Interference to Aircraft Electronic Equipment from Devices Carried > Aboard". > Since I don't have the complete document, does anyone know if this > document > contains EMC specs/limits on RF emissions, etc. Are these the same > specs/limits as outlined in IEC 60601-1-02? ... same as CISPR 11? > > ------------------------------------------- > This message is from the IEEE EMC Society Product Safety > Technical Committee emc-pstc discussion list. > > Visit our web site at: http://www.ewh.ieee.org/soc/emcs/pstc/ > > To cancel your subscription, send mail to: > majord...@ieee.org > with the single line: > unsubscribe emc-pstc > > For help, send mail to the list administrators: > Ron Pickard: emc-p...@hypercom.com > Dave Heald: davehe...@attbi.com > > For policy questions, send mail to: > Richard Nute: ri...@ieee.org > Jim Bacher: j.bac...@ieee.org > > All emc-pstc postings are archived and searchable on the web at: > http://ieeepstc.mindcruiser.com/ > Click on "browse" and then "emc-pstc mailing list" > > > ------------------------------------------- > This message is from the IEEE EMC Society Product Safety > Technical Committee emc-pstc discussion list. > > Visit our web site at: http://www.ewh.ieee.org/soc/emcs/pstc/ > > To cancel your subscription, send mail to: > majord...@ieee.org > with the single line: > unsubscribe emc-pstc > > For help, send mail to the list administrators: > Ron Pickard: emc-p...@hypercom.com > Dave Heald: davehe...@attbi.com > > For policy questions, send mail to: > Richard Nute: ri...@ieee.org > Jim Bacher: j.bac...@ieee.org > > All emc-pstc postings are archived and searchable on the web at: > http://ieeepstc.mindcruiser.com/ > Click on "browse" and then "emc-pstc mailing list" > ------------------------------------------- This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. 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