Re: CE marking of equipment for military facilities
Alexandru, A couple of years ago, I was involved with the testing of a piece of "military equipment" manufactured in the US and going to the EU. It was part of an elaborate weapons system. It was being "sponsored" by a department of the US government and was being delivered to a military base in Europe. It was quite an unusual project. I quickly learned that the usual customs warnings and labeling advice was falling on deaf ears. There were to be no customs and no labeling. A dedicated truck brought the equipment to us in Atlanta, GA from an area in the Southwest US. When testing was complete, the same truck returned from cross country to pick up the equipment. I was told the one-of-a-kind equipment was being taken to a US airbase for shipment to the European military base, (i.e. no customs). The only reason the manufacturer was testing for CE (EMC and Safety) was to do their due diligence in the event someone was injured using the equipment upon installation. Your "obligation" question may partially be answered in how the equipment is going to cross the borders and, strangely enough, if your shipper/consignee has more authority than the customs agents. This is just an opinion based on my point of view, from a project where the rules SEEM to have been suspended due to the nature of the product and players in the game. Best Regards, Scott Proffitt Advanced Compliance Solutions, Inc. 770-831-8048 www.acstestlab.com From: Alexandru Guidea To: Internet Mail::["'emc-p...@majordomo.ieee.org'" ] Subject: CE marking of equipment for military facilities List-Post: emc-pstc@listserv.ieee.org Date: 3/4/02 4:12 PM Dear colleagues, Need your expert opinion regarding the obligation to CE mark commercial equipment (installation) intended to be used in foreign military bases on European soil, assuming compliance with equivalent MIL/DEF standards is not required. Under "normal" circumstances, this equipment would be CE marked to LVD, Machinery, and EMC Directives. Thanks, Alexandru Guidea CAE Inc. Montreal, Canada --- 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...@mediaone.net 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"
Re: CE marking of equipment for military facilities
I read in !emc-pstc that Alexandru Guidea wrote (in <1c89780c4179d3118c580090277193580fc10...@caemsx01.cae.ca>) about 'CE marking of equipment for military facilities', on Mon, 4 Mar 2002: >Need your expert opinion regarding the obligation to CE mark commercial >equipment (installation) intended to be used in foreign military bases on >European soil, assuming compliance with equivalent MIL/DEF standards is not >required. Under "normal" circumstances, this equipment would be CE marked to >LVD, Machinery, and EMC Directives. It probably depends on the country concerned, also who is buying the products. In UK, for example, the buyer of such non-military products for service accommodation is a civilian organization, and CE marking is required. But if, in another country, the military authorities buy the stuff, they can probably decide more or less independently whether they need CE marking or not. In some sensitive locations, they may want tighter limits! -- Regards, John Woodgate, OOO - Own Opinions Only. http://www.jmwa.demon.co.uk Interested in professional sound reinforcement and distribution? Then go to http://www.isce.org.uk PLEASE do NOT copy news posts to me by E-MAIL! --- 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...@mediaone.net 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"
RE: NEBS Standards
Hi Andy, Look to GR-487-Core for telecom equipment placed in an outdoor environment. Regards, Kaz Gawrzyjal Dell Computer Corp. -Original Message- From: John Juhasz [mailto:jjuh...@fiberoptions.com] Sent: Monday, March 04, 2002 3:31 PM To: 'Veit, Andy'; emc-p...@majordomo.ieee.org Subject: RE: NEBS Standards GR-63-CORE Covers the environmental aspects, seismic, office vibration, transportation/handling vibration/shock, temp/humidity - operating/storage & extremes, airborne contaminants, fire spread, etc . . . John Juhasz Fiber Options Bohemia, NY -Original Message- From: Veit, Andy [mailto:andy.v...@mts.com] Sent: Monday, March 04, 2002 3:41 PM To: emc-p...@majordomo.ieee.org Subject: NEBS Standards I know that this was recently covered, but I turns out deleted the postings. Can someone tell me what (Bellcore and others?) standards cover the mechanical (shock, vibration) portion of the NEBS tests performed on telecom equipment? Thank you- -Andy Andrew Veit Systems Design Engineer MTS Systems Corp Ph: 919.677.2507 Fax: 919.677.2480 1001 Sheldon Drive Cary, NC 27513 --- 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...@mediaone.net 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...@mediaone.net 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...@mediaone.net 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"
Pencil erasers for pre-EMI cleaning? (cleaning mating surface s, chassis, )
I read in !emc-pstc that david_ster...@ademco.com wrote (in <2DF7C54A75B dd311b61700508b64231002c5a...@nyhqex1.ademcohq.com>) about 'Pencil erasers for pre-EMI cleaning? (cleaning mating surface s, chassis, )', on Mon, 4 Mar 2002: >It prints on legal (8-1/2 x >17) paper. That size is 'illegal' in Europe! (;-) -- Regards, John Woodgate, OOO - Own Opinions Only. http://www.jmwa.demon.co.uk Interested in professional sound reinforcement and distribution? Then go to http://www.isce.org.uk PLEASE do NOT copy news posts to me by E-MAIL! --- 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...@mediaone.net 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"
RE: NEBS Standards
GR-63-CORE Covers the environmental aspects, seismic, office vibration, transportation/handling vibration/shock, temp/humidity - operating/storage & extremes, airborne contaminants, fire spread, etc . . . John Juhasz Fiber Options Bohemia, NY -Original Message- From: Veit, Andy [mailto:andy.v...@mts.com] Sent: Monday, March 04, 2002 3:41 PM To: emc-p...@majordomo.ieee.org Subject: NEBS Standards I know that this was recently covered, but I turns out deleted the postings. Can someone tell me what (Bellcore and others?) standards cover the mechanical (shock, vibration) portion of the NEBS tests performed on telecom equipment? Thank you- -Andy Andrew Veit Systems Design Engineer MTS Systems Corp Ph: 919.677.2507 Fax: 919.677.2480 1001 Sheldon Drive Cary, NC 27513 --- 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...@mediaone.net 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...@mediaone.net 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"
CE marking of equipment for military facilities
Dear colleagues, Need your expert opinion regarding the obligation to CE mark commercial equipment (installation) intended to be used in foreign military bases on European soil, assuming compliance with equivalent MIL/DEF standards is not required. Under "normal" circumstances, this equipment would be CE marked to LVD, Machinery, and EMC Directives. Thanks, Alexandru Guidea CAE Inc. Montreal, Canada --- 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...@mediaone.net 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"
NEBS Standards
I know that this was recently covered, but I turns out deleted the postings. Can someone tell me what (Bellcore and others?) standards cover the mechanical (shock, vibration) portion of the NEBS tests performed on telecom equipment? Thank you- -Andy Andrew Veit Systems Design Engineer MTS Systems Corp Ph: 919.677.2507 Fax: 919.677.2480 1001 Sheldon Drive Cary, NC 27513 --- 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...@mediaone.net 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"
RE: Differences between EN55022:1987 and 1994
I have no idea about the differences. Why this question, is it because you have a unit which is tested according to EN55022:1987 and you wondering if it fulfils the 1994 version ? For CE-marking of Information Technology Equipment you can use EN55022:1994 or EN55022:1998 without any involvement of a notified body. Best regards Amund Westin, Oslo/Norway -Opprinnelig melding- Fra: owner-emc-p...@majordomo.ieee.org [mailto:owner-emc-p...@majordomo.ieee.org]På vegne av Gaetan Hogue Sendt: 1. mars 2002 22:13 Til: emc-p...@majordomo.ieee.org Emne: Differences between EN55022:1987 and 1994 Hi Group What was the major differences between EN55022:1987 and EN55022:1994? Do a web site exist to find the changes when the standard is modified? Thanks Gaétan Hogue Approvals Manager Eicon Networks Phone: (514) 832-3488 Fax: (514) 745-5588 Email: gaet...@eicon.com http://www.eicon.com --- 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...@mediaone.net 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...@mediaone.net 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"
Re: FCC Compliance
Andrew, Normally equipment on aircraft have to meet at least DO-160, which requires emissions and immunity both. Sometimes an Aircraft Manufacturer will have their own. Boeings is D6-16050-4 I believe. If you've only been asked for FCC you are getting off lightly... Derek.
RE: Pencil erasers for pre-EMI cleaning? (cleaning mating surface s, chassis, )
I imported it from their website into MS Word. It prints on legal (8-1/2 x 17) paper. Click on any product, then click the topics in the pull-down menu. Select 'metal compatibility' David -Original Message- From: Chris Maxwell [mailto:chris.maxw...@nettest.com] Sent: Monday, March 04, 2002 8:43 AM To: John Woodgate; emc-p...@majordomo.ieee.org Subject: RE: Pencil erasers for pre-EMI cleaning? (cleaning mating surfaces, chassis, ) How can one obtain the graph? I got mine by accident. Instrument Specialties is only a six hour drive away. We have done osme business with them and they used to visit our company regularly. During one of the visits they just gave me a design guide (it's a catalog of products that also includes some tips on how to use their products). I've been told that Instrument Specialties is now Laird Technologies. Maybe you can look them up on the web? (www.instr.com still works) It would really be great if they had put their design guide online. Or maybe if you could contact them from the website; perhaps they could mail you a design guide. The potential problem here is that my copy is an old one ~1997. They may have edited the metals compatibility graph out of later editions. Best regards, Chris > -Original Message- > From: John Woodgate [SMTP:j...@jmwa.demon.co.uk] > Sent: Friday, March 01, 2002 5:19 PM > To: emc-p...@majordomo.ieee.org > Subject: Re: Pencil erasers for pre-EMI cleaning? (cleaning > mating surfaces, chassis, ) > > > I read in !emc-pstc that Chris Maxwell > wrote > (in <83d652574e7af740873674f9fc12dbaaf7d...@utexh1w2.gnnettest.com>) > about 'Pencil erasers for pre-EMI cleaning? (cleaning mating surfaces, > chassis, )', on Fri, 1 Mar 2002: > >If you're worried about galvanic corrosion. An excellent (and free) > >source of information is the Instrument Specialties Catalog and > Design > >Guide.The back cover is a foldout which has a very nice color > coded > >chart that shows metal compatibility while taking into account the > >environment. > > > >Their graph is easily worth a thousand words. > > How can one obtain it? > -- > Regards, John Woodgate, OOO - Own Opinions Only. > http://www.jmwa.demon.co.uk > Interested in professional sound reinforcement and distribution? Then > go to > http://www.isce.org.uk > PLEASE do NOT copy news posts to me by E-MAIL! > > --- 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/so
RTTE
Have any European states that are not EU or EFTA members adopted the RTTE Directive and Notificaion process? In other words, will any other European countries allow a radio product to be placed on their market if the processes of the RTTE Directive are followed without the need for any other special national process to be followed? Richard Woods Sensormatic Electronics Tyco International --- 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...@mediaone.net 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"
Re: Differences between EN55022:1987 and 1994
The differences between these two standards is very little indeed. However, the 1998 version of the standard is hugely diferent to the 1994 version, with the introduction of telecoms port emissions being the major difference. Presently, the 1994 and 1998 versions co-exist, with the 1994 version expected to be dropped in mid 2003. I know that I am not answering the question, but the 1987 version has been dead for years, and has no standing today. So I am just prompting to see if the question is the correct one Regards John Davies Replies to this message may be posted in a public forum. --- 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...@mediaone.net 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"
RE: Jate Blue Book
Ron, The download is at http://www.jate.or.jp/english/example/analog_pdf.html If you need Blue Book testing, contact me! Good luck... Roger Magnuson Managing Director TGC Communication AB Industrivagen 5, 171 48 Solna SWEDEN Phone: +46 856250053 (direct) Fax: +46 856250055 mobile: +46 707770594 mailto:ro...@tgc.se internet: http://www.tgc.se -Original Message- From: treg-appro...@world.std.com [mailto:treg-appro...@world.std.com]On Behalf Of Ron Pickard Sent: den 28 februari 2002 23:33 To: emc-p...@ieee.org; t...@world.std.com Subject: Jate Blue Book Hello to all, I have heard that the JATE Blue Book:2000 (in English) is freely available for download. Is it actually available for free download? And if anyone knows about this, then please share the web address to do this. Actually, I have been at JATE's website, "http://www.jate.or.jp/index-e.html";, and found the "Ordinance Concerning Terminal Facilities, etc." in multple parts. Is this the Blue Book or something else? It would be most appreciated to get a free download of the Blue Book in English (if its available). Please advise. Best regards, Ron Pickard rpick...@hypercom.com
RE: Pencil erasers for pre-EMI cleaning? (cleaning mating surfaces, chassis, )
How can one obtain the graph? I got mine by accident. Instrument Specialties is only a six hour drive away. We have done osme business with them and they used to visit our company regularly. During one of the visits they just gave me a design guide (it's a catalog of products that also includes some tips on how to use their products). I've been told that Instrument Specialties is now Laird Technologies. Maybe you can look them up on the web? (www.instr.com still works) It would really be great if they had put their design guide online. Or maybe if you could contact them from the website; perhaps they could mail you a design guide. The potential problem here is that my copy is an old one ~1997. They may have edited the metals compatibility graph out of later editions. Best regards, Chris > -Original Message- > From: John Woodgate [SMTP:j...@jmwa.demon.co.uk] > Sent: Friday, March 01, 2002 5:19 PM > To: emc-p...@majordomo.ieee.org > Subject: Re: Pencil erasers for pre-EMI cleaning? (cleaning > mating surfaces, chassis, ) > > > I read in !emc-pstc that Chris Maxwell > wrote > (in <83d652574e7af740873674f9fc12dbaaf7d...@utexh1w2.gnnettest.com>) > about 'Pencil erasers for pre-EMI cleaning? (cleaning mating surfaces, > chassis, )', on Fri, 1 Mar 2002: > >If you're worried about galvanic corrosion. An excellent (and free) > >source of information is the Instrument Specialties Catalog and > Design > >Guide.The back cover is a foldout which has a very nice color > coded > >chart that shows metal compatibility while taking into account the > >environment. > > > >Their graph is easily worth a thousand words. > > How can one obtain it? > -- > Regards, John Woodgate, OOO - Own Opinions Only. > http://www.jmwa.demon.co.uk > Interested in professional sound reinforcement and distribution? Then > go to > http://www.isce.org.uk > PLEASE do NOT copy news posts to me by E-MAIL! > > --- 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...@mediaone.net 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"
New list in OJ - LVD 73/23/EEC
New list of harmonized standards within Low Voltage Directive 73/23/EEC published in the OJ today. Download here http://europa.eu.int/eur-lex/en/dat/2002/c_057/c_05720020304en00010097.pdf Amund --- 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...@mediaone.net 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"
RE: SV: Screened Room Ambient Scans (preamps, noise floor )
Russel, The noise floor of your screen room should resemble the shape of your antenna factor and that is dependent on the antenna you chooses. :-) Perhaps for a quick comparison I have a curve of best fit equation for a noise floor measurement. This was from my work some years ago but it should still be valid from 50 MHz to 1000 MHz. I was at that time using the Chase (now Shafner) 'Bilog' (I am refering to the blue model) and RBW set at 1kHz, with correction to the cable attenuation included. The regression equation is to facilitate quick checking for any compromise in the SE. y1 = 7E-12x^6 - 8E-09x^5 + 4E-06x^4 - 0.0008x63 + 0.0887x^2 - 4.7919x + 80 (for 50 to 300 MHz) y2 = 2E-16x^6 - 7E-13x^5 + 9E-10x^4 - 5E-07x^3 + 6E-05x^2 + 0.0597x - 25 y1 and y2 is the Electric field strength in dBuV/m x is the frequebcy in 10s of M Hz, The chart is as attached, (See attached file: Regression_analysis_noise_floor_measurements_data.pdf) Adjust these results for the (CISPR?) measurement bandwidth before you check for the various forms of shielding compromises within your enclosure. BTW, a simple check is to see if the local radio station gets through into your receiving antenna as you closes the door in the enclosure. cheers, Tim Foo |-+-> | | Hans Mellberg | | | | | | Sent by: | | | owner-emc-pstc@majordo| | | mo.ieee.org | | | | | | | | | 03/04/02 02:53 AM | | | Please respond to Hans| | | Mellberg | | | | |-+-> >| | | |To: "Greilich, Jeff" , John Woodgate , | |emc-p...@majordomo.ieee.org | |cc: (bcc: Wan Juang Foo/ece/staff/npnet) | |Subject: RE: SV: Screened Room Ambient Scans (preamps, ) | >| Hans Mellberg 03/04/02 02:53 AM While you do mention the screen room, a word of caution for using pre-amps on OATS. When there are strong ambients such as nearby TV and Radio stations, there are quite a bit of intermodulation products as well as "bleeding". I see that often and I sometimes have to switch between amp and no-amp to determine if the signal seen with the pre-amp is real. Another caution is when measuring signals near the noise floor and amplifying them does not give accurate levels. I have seen as much as a 10 dB error when you amplify signals near the floor level. Some amplifiers are better than others! h.knud...@niros.com 03/01/02 03:37 PM Hello John, The purpose of a pre-amplifier in the test set-up is to lower the noise floor. i.e. if the over-all noise floor is to high as a result of low gain in the total system, low antenna gain, high cable losses or bad noise figure in the receiving device a pre-amplifier will definitely give a better result. But if the reason for the high noise floor is due to bad shielding of the screened room it will definitely not help. Therefore I asked Russel: Which antenna and measuring receiver/spectrum analyser do you use? Information on those items may help to guide further on the issue. Best regards Helge Knudsen Test & Approval manager Niros Telecommunication Hirsemarken 5 DK-3520 Farum Denmark Tel +45 44 34 22 51 Fax +45 44 99 28 08 email h.knud...@niros.com "Greilich, Jeff" 03/01/02 05:46 AM John, You hit it on the head. The reason for the first preamp is to overcome line losses and the second preamp would be used if a spectrum analyzer is being used in lieu of a CISPR Receiver. Regards, Jeff Cortland Richmond <72146@compuserve.com> 03/01/02 03:30 AM Russell (r@totalise.co.uk) wrote: >> I'm looking at an ambient scan starting at 32dBuV/m @ 30MHz, dropping to 18dBuV/m @ 70MHz then gradually (with small peaks and troughs) rising to 41dBuV/m @ 1GHz. << Russell, Are you sure these are room ambients? They might be the analyzer noise floor. Generally, a decent room will not admit signals high enough to be seen above the instrument noise floor. Even a poorly built one should attenuate 60 dB or better and only show a few, discrete ambients from nearby, high-power sources. Cortland John Woodgate 02/28/02 03:03 PM I read in
FCC Compliance
Hi all. Hope someone can help with this query. Our company has supplied equipment to Boeing which is installed in aircraft. The original contract to supply a number of systems was completed. We now have a contract with Boeing for repair. Boeing have asked for a declaration on whether the equipment meets FCC Requlations or not. The Federal Communications Commission (FCC), a regulatory Agency of the U.S. Government, has established an equipment authorization program to control radio interference from radio transmitters and certain other electronic products. Radio equipment may not be imported or marketed in the U.S. until it has complied with the equipment authorization procedures of the FCC. Substantial penalties may be imposed for equipment that is imported or marketed in violation of the FCC Rules. Does this type of equipment need to meet these regulation or is it exempt? Regards Andrew Price This email and any attachments are confidential to the intended recipient and may also be privileged. If you are not the intended recipient please delete it from your system and notify the sender. You should not copy it or use it for any purpose nor disclose or distribute its contents to any other person. --- 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...@mediaone.net 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"
