RE: Electronic unit panel sizes
Brian: My understanding is that the U comes from rack Units, where the incremental rack height is 1.75 inches and then continues in integer multiples. So, 7.0 8.75 etc are all allowable rack panel heights, but 11.0 inches is not. It sounds to me like the American who chose 11 inches for a rack-mounted piece of gear made a bad choice. If they made that bad choice, you also want to carefully check the number and spacing of the mounting holes on the front panel or rack ears to see if they align with standard rack rail hole spacings (I don't have that information handy, and seem to recall more than one standard (sic)). This may not be any help except to confirm that you're correct, not crazy. Regards, Jack Jacob Z. Schanker, P.E. Director of Agency Compliance Adaptive Broadband Corporation 175 Science Parkway Rochester, NY 14620 USA +716 242 8454 (voice) +716 241 5590 (fax) jschan...@adaptivebroadband.com mailto:jschan...@adaptivebroadband.com -- From: Brian Harlowe [SMTP:bharl...@vgscientific.com] Sent: Wednesday, October 27, 1999 12:30 PM To: emc-p...@ieee.org Subject: Electronic unit panel sizes Excuse me from drifting away from the main topics of this forum. But can one of you whizzy american engineers help a poor englishman out. In the UK ( and Europe) front panels are measured in Us where 1U equals 1.75 ins or 44.45 millimetres. Does this system operate in the states? The reason I ask is we have an American unit to accomodate that 11 inches high which works out at 6.29U!!! Help Brian Harlowe * opinions expressed here are personal and in no way reflect the position of VG Scientific - This message is coming from the emc-pstc discussion list. To cancel your subscription, send mail to majord...@ieee.org with the single line: unsubscribe emc-pstc (without the quotes). For help, send mail to ed.pr...@cubic.com, jim_bac...@monarch.com, ri...@sdd.hp.com, or roger.volgst...@compaq.com (the list administrators). - This message is coming from the emc-pstc discussion list. To cancel your subscription, send mail to majord...@ieee.org with the single line: unsubscribe emc-pstc (without the quotes). For help, send mail to ed.pr...@cubic.com, jim_bac...@monarch.com, ri...@sdd.hp.com, or roger.volgst...@compaq.com (the list administrators).
RE: India
Try the following Indian website http://www.nic.in/search.htm and search for standards or whatever. My search for standards got 420 hits. Good luck. We have been able to sell radio telecommunications products into India based on FCC approvals. Jacob Z. Schanker, P.E. Director of Agency Compliance Adaptive Broadband Corporation 175 Science Parkway Rochester, NY 14620 USA +716 242 8454 (voice) +716 241 5590 (fax) jschan...@adaptivebroadband.com mailto:jschan...@adaptivebroadband.com -- From: Bill Somerfield [SMTP:bi...@eliz.com] Sent: Tuesday, September 14, 1999 4:18 PM To: emc-p...@ieee.org Subject: India Does anyone in the group have any knowledge of Indian EMC or Safety Standards? Thahk you for any help in advance, Bill Somerfield QA/Compliance Manager Elizabeth-Hata International bi...@eliz.com - This message is coming from the emc-pstc discussion list. To cancel your subscription, send mail to majord...@ieee.org with the single line: unsubscribe emc-pstc (without the quotes). For help, send mail to ed.pr...@cubic.com, jim_bac...@monarch.com, ri...@sdd.hp.com, or roger.volgst...@compaq.com (the list administrators). - This message is coming from the emc-pstc discussion list. To cancel your subscription, send mail to majord...@ieee.org with the single line: unsubscribe emc-pstc (without the quotes). For help, send mail to ed.pr...@cubic.com, jim_bac...@monarch.com, ri...@sdd.hp.com, or roger.volgst...@compaq.com (the list administrators).
That doesn't make any sense
Rich: I want to thank you, and compliment you, for so accurately describing managment reactions to regulatory problems in your July 20 posting to the emc-pstc. It completely mirrors my own past (and continuing) experiences. I have also gotten the reaction well, that doesn't make any sense in relation to an inconvenient rule in some international standard. Why did they do that ? is asked, like I should know. Then the big question: Can we get a waiver? Dialogue: No, I don't think so. Manager: Did you try? The years of experience and intuitive feel for what is and what is not possible, mean little to the uninformed arrogance of a manager who is used to having it his way (almost always his) and expecting the world to turn at his command. The bad news aspect also looms large, as you so aptly describe. Gotta get back to work. Jack Jacob Z. Schanker, P.E. Director of Agency Compliance Adaptive Broadband Corporation 175 Science Parkway Rochester, NY 14620 USA +716 242 8454 (voice) +716 241 5590 (fax) jschan...@adaptivebroadband.com The opinions expressed above are obviously someone else's. - This message is coming from the emc-pstc discussion list. To cancel your subscription, send mail to majord...@ieee.org with the single line: unsubscribe emc-pstc (without the quotes). For help, send mail to ed.pr...@cubic.com, jim_bac...@monarch.com, ri...@sdd.hp.com, or roger.volgst...@compaq.com (the list administrators).
RE: emc compliance
Lisa: I sure wouldn't think so. What type of Declaration could you generate for such a product? Declaration of mostly Conformity? What would a customer's reaction be to reading that if they use the product they buy on a certain frequency (presumably within its intended operating range) it requires an external ferrite. Will you include the ferrite ? Not a very attractive business practice, in my opinion. Swallow hard and do the right thing. Jack Jacob Z. Schanker, P.E. Director of Agency Compliance Adaptive Broadband Corporation 175 Science Parkway Rochester, NY 14620 USA +716 242 8454 (voice) +716 241 5590 (fax) jschan...@adaptivebroadband.com -- From: lisa_cef...@mksinst.com[SMTP:lisa_cef...@mksinst.com] Sent: Friday, June 25, 1999 3:36 PM To: emc-p...@majordomo.ieee.org Subject: emc compliance Here's a question If you have a product that, at one particular frequency during radiated RF, you simply cannot get to pass the requirements of the relative CE standard without putting an external ferrite on the cable, is it legal , to still mark it, provided you inform your customers via the declaration of conformity or in the manual etc., that they could experience problems at such and such frequencies and if they do, to use a ferrite? (boy, that was a mouthful). Faced with a redesign or a statement, the words would be the easier route to take, since in this case, the customer could probably never see the problem frequency range. Comments? thank you for any advise, Lisa - This message is coming from the emc-pstc discussion list. To cancel your subscription, send mail to majord...@ieee.org with the single line: unsubscribe emc-pstc (without the quotes). For help, send mail to ed.pr...@cubic.com, jim_bac...@monarch.com, ri...@sdd.hp.com, or roger.volgst...@compaq.com (the list administrators). - This message is coming from the emc-pstc discussion list. To cancel your subscription, send mail to majord...@ieee.org with the single line: unsubscribe emc-pstc (without the quotes). For help, send mail to ed.pr...@cubic.com, jim_bac...@monarch.com, ri...@sdd.hp.com, or roger.volgst...@compaq.com (the list administrators).
UL on DC powered radios ?
This is reposted because I believe it went into the bit bucket the first time. Group: Pehaps you can help me overcome an area of some confusion to me. If our radio products are AC powered from a line cord, we get UL listing, CSA certification, etc. No question. But what if a radio is DC powered from a customer provided source of +12VDC, +24VDC or -48VDC ? Should we still be seeking UL, CSA, etc? And, what if the radio is DC powered through an AC-DC adapter, which is itself UL listed and CSA certified, and which we provide. Do we need to get UL/CSA on the radio product too? I have been getting listing and certification on the products described above, but people have asked some questions which cause me to ask if this is a necessary approach. Thanks, Jack Jacob Z. Schanker, P.E. Director of Agency Compliance Adaptive Broadband Corporation 175 Science Parkway Rochester, NY 14620 USA +716 242 8454 (voice) +716 241 5590 (fax) jschan...@adaptivebroadband.com - This message is coming from the emc-pstc discussion list. To cancel your subscription, send mail to majord...@ieee.org with the single line: unsubscribe emc-pstc (without the quotes). For help, send mail to ed.pr...@cubic.com, jim_bac...@monarch.com, ri...@sdd.hp.com, or roger.volgst...@compaq.com (the list administrators).
RE: EMC for automation control - Electricity utilities (UNIPEDE )
For what it's worth, I recall wind-up watches with cases which were labelled non-magnetic. My assumption is that a magnetic field can affect the movement, although I wouldn't think an AC magnetic field would matter unless it was very strong. A more likely reason for not wearing watches (or jewelry of any kind) is basic safety around live circuits. No jewelry, no neckties (or kerchiefs), and one hand in the pocket are still good rules. Jack Jacob Z. Schanker, P.E. Director of Agency Compliance Microwave Data Systems 175 Science Parkway Rochester, NY 14620 USA +716 242 8454 (voice) +716 241 5590 (fax) jschan...@mdsroc.com -- -- From: Mike Hopkins[SMTP:mhopk...@keytek.com] Sent: Tuesday, March 30, 1999 4:10 PM To: 's_doug...@ecrm.com'; pet...@foxboro.com.au Cc: emc-p...@majordomo.ieee.org Subject: RE: EMC for automation control - Electricity utilities (UNIPEDE ) Very interesting -- my father also worked for what was then New England Power and was a substation operator in Tewksbury, MA -- he also went to other smaller sub-stations to switch lines in or out for maintence or to clear trouble problems and I have similar recollections about the electricity in the air -- you really could feel it! An interesting side note - he could never wear a watch of any kind -- they would either run in their own time zones or not work for long at all -- he attributed this to the surrounding electric fields, but I've never figured out how that would affect a mechanical watch!. As for ESD (human ESD) as opposed to AC electric or magnetic fields, the levels of 8kV and 15kV (contact/air) are on the high side. Discharges of a few kV happen all the time without us even knowing it; discharges that we feel on a dry day are typically in the 5 to 10kV range, but a 15kV discharge from the end of your finger is something you'd remember! Even 10kV is pretty uncomfortable.. Hope this is helpful, but I doubt it would influence the people who wrote the standard... Mike Hopkins mhopk...@keytek.com -Original Message- From: s_doug...@ecrm.com [SMTP:s_doug...@ecrm.com] Sent: Tuesday, March 30, 1999 10:26 AM To: pet...@foxboro.com.au Cc: emc-p...@majordomo.ieee.org Subject:Re: EMC for automation control - Electricity utilities (UNIPEDE) Peter, My father worked for the electric utility for many years. There were times he could take me with him to check on how a substation was working after some maintenance or upgrade was performed. From direct experience I can tell you that when you enter the substation building, you can quite often feel and smell the electricity in the air. The electrostatic fields that build up in these environments can be substantial. Yes, everything inside is well grounded, but when you have thousands of volts running around big copper bus bars, switching systems, transformers, etc. you hear the hum and feel the electricity in the air. Back then, I thought it was really neat as I did not have the healthy respect that I have since acquired the hard way. One other thought here, would you want your TV going blink just at the end of the local cricket match or the last quarter of the World Cup football game? That could happen if some protective device or overcurrent sensor got zapped and caused a shutdown when there was really no system problem requiring a shutdown. Scott s_doug...@ecrm.com pet...@foxboro.com.au writes: Hi. I've recently been shown a standard published by a European group called UNIPEDE titled Automation and Control Apparatus for Generating Stations and Substations - Electromagnetic Compatibility Immunity Requirements - Ref# 23005Ren9523. This standard generally adheres to the same requirements for immunity as the CE-mark standards, however for ESD it requires 8kV contact and 15kV air for HV substation environments. As is usually the case, there's no rationale provided as to why these levels where chosen (something that really annoys me about most standards). Does anyone have suggestions as to why the authors of the standard would expect worse ESD conditions in a substation than they seem to expect in an air conditioned, carpeted office? (equipment in environments other than HV substations only need meet 6kV contact, 8kV air according to this standard) - Please note: The views, opinions and information expressed and/or contained herein do not necessarily reflect the opinions or views of Foxboro, the organisation/s through which this communication was transmitted nor any other third party, unless explicitly stated so. Peter Poulos (Hardware Design Engineer) Foxboro Australia 42 McKechnie Drive, Eight Mile Plains, QLD, Australia 4113
RE: FCC Form 731
Susan: You can find the FCC electronic filing site at: https://gullfoss.fcc.gov/prod/oet/index.html Jack Jacob Z. Schanker, P.E. Director of Agency Compliance Microwave Data Systems 175 Science Parkway Rochester, NY 14620 USA +716 242 8454 (voice) +716 241 5590 (fax) jschan...@mdsroc.com -- -- From: Beard, Susan[SMTP:sbe...@ge-harris.com] Sent: Wednesday, January 13, 1999 3:00 PM To: 'emc-p...@ieee.org' Subject: FCC Form 731 Is there a web site for the FCC Application for Equipment Authorization, Form 731, where the application can electronically be completed and also a way to file the application electronically? I found the form on the FCC's web site, but it apparently allows a copy but no data to be entered. Thanks, Susan Beard - This message is coming from the emc-pstc discussion list. To cancel your subscription, send mail to majord...@ieee.org with the single line: unsubscribe emc-pstc (without the quotes). For help, send mail to ed.pr...@cubic.com, j...@gwmail.monarch.com, ri...@sdd.hp.com, or roger.volgst...@compaq.com (the list administrators). - This message is coming from the emc-pstc discussion list. To cancel your subscription, send mail to majord...@ieee.org with the single line: unsubscribe emc-pstc (without the quotes). For help, send mail to ed.pr...@cubic.com, j...@gwmail.monarch.com, ri...@sdd.hp.com, or roger.volgst...@compaq.com (the list administrators).
RE: Language Translation
Bill: Do NOT have them translated by the local high school language teacher. Do contact a professional technical translation organization which uses native-speakers. We have used Comprehensive Language Center, Inc., 4200 Wilson Blvd., Suite 950, Arlington, VA 22203-1800. The preseident is Robert Neil at 703 247 0714, email rn...@comlang.com. Their web site is http://www.comlang.com . Do expect 150 pages of technical translation to cost a lot. Jack Jacob Z. Schanker, P.E. Director of Agency Compliance Microwave Data Systems 175 Science Parkway Rochester, NY 14620 USA +716 242 8454 (voice) +716 241 5590 (fax) jschan...@mdsroc.com -- -- From: Bill Somerfield[SMTP:su...@telerama.com] Sent: Monday, November 16, 1998 2:41 PM To: Emc-Pstc Subject: Language Translation Group, Does anyone in the group have any experiences, references, or suggestions on having highly technical operators manuals translated from English to other languages (EU)? The manuals are about 150 pages of a mixture of text, tables, and graphics. Thank you for any responses in advance, Respectfully, Bill Somerfield QA/Compliance Manager Elizabeth-Hata International Banco Industrial Park Irwin, PA 15642 USA Phone: 724-864-6632 Fax: 724-864-6635 bi...@eliz.com su...@telerama.com - This message is coming from the emc-pstc discussion list. To cancel your subscription, send mail to majord...@ieee.org with the single line: unsubscribe emc-pstc (without the quotes). For help, send mail to ed.pr...@cubic.com, j...@gwmail.monarch.com, ri...@sdd.hp.com, or roger.volgst...@compaq.com (the list administrators). - This message is coming from the emc-pstc discussion list. To cancel your subscription, send mail to majord...@ieee.org with the single line: unsubscribe emc-pstc (without the quotes). For help, send mail to ed.pr...@cubic.com, j...@gwmail.monarch.com, ri...@sdd.hp.com, or roger.volgst...@compaq.com (the list administrators).
RE: Burning Card Module
Peter: The first thing I'd suspect is lightning or a surge from nearby lightning coming down the antenna spigot. Having spent much of my career around radio equipment, I've seen many charred boards caused by lightning. The path taken within the board does not follow any obvious logical path. Lightning is like the proverbial 800 pound gorilla - it goes where it wants to go. Was the antenna installed according to the National Electric Code ? Cheers, Jack Jacob Z. Schanker, P.E. Director of Agency Compliance Microwave Data Systems 175 Science Parkway Rochester, NY 14620 USA +716 242 8454 (voice) +716 241 5590 (fax) jschan...@mdsroc.com -- -- From: pe...@itl.co.il[SMTP:pe...@itl.co.il] Sent: Thursday, November 05, 1998 5:16 PM To: emc-p...@ieee.org Subject: Burning Card Module Dear Members, I am sure some of you can give me ideas on how to analyze a card module which in four different occassions caused charring and smoke within the equipment. In all cases, fire did not spread and the charring occurred in all cases, arounf decoupling SMT capacitors located between the Vcc and ground. The subject card sits in an industrial type computer within a GSM equipment. The card is fed by 5 V and 12 Vdc from the computer power supply and employs two SE:V interfaces. It employs a piggy board with a receiver with direct connection to an external outddor antenna. Any suggestions how this may have happened in the field, on four different occassions and the charring/burning occured around the decouplng capacitors. For this let us assume PWB is flame rated 94V-0 and is Recognized. Regards, PETER S. MERGUERIAN MANAGING DIRECTOR PRODUCT TESTING DIVISION I.T.L. (PRODUCT TESTING) LTD. HACHAROSHET 26, P.O.B. 211 OR YEHUDA 60251, ISRAEL TEL: 972-3-5339022 FAX: 972-3-5339019 E-MAIL: pe...@itl.co.il Visit our Website: http://www.itl.co.il - This message is coming from the emc-pstc discussion list. To cancel your subscription, send mail to majord...@ieee.org with the single line: unsubscribe emc-pstc (without the quotes). For help, send mail to ed.pr...@cubic.com, j...@gwmail.monarch.com, ri...@sdd.hp.com, or roger.volgst...@compaq.com (the list administrators). - This message is coming from the emc-pstc discussion list. To cancel your subscription, send mail to majord...@ieee.org with the single line: unsubscribe emc-pstc (without the quotes). For help, send mail to ed.pr...@cubic.com, j...@gwmail.monarch.com, ri...@sdd.hp.com, or roger.volgst...@compaq.com (the list administrators).
RE:
Mike: FAR to me means Federal Acquisition Regulation which is in the contracts domain. Ask a suit at your company. Regards, Jack Jacob Z. Schanker, P.E. Director of Agency Compliance Microwave Data Systems 175 Science Parkway Rochester, NY 14620 USA +716 242 8454 (voice) +716 241 5590 (fax) jschan...@mdsroc.com -- -- From: Campi, Mike[SMTP:mca...@fpc.fujitsu.com] Sent: Thursday, October 08, 1998 12:02 PM To: 'EMC/PSTC' Dear Group - Does anyone know what FAR121 is. This apparently has to do with aviation safety but I have no other information than the standard number. Regards, Mike Campi Corporate Compliance Engineer Fujitsu PC Corporation - This message is coming from the emc-pstc discussion list. To cancel your subscription, send mail to majord...@ieee.org with the single line: unsubscribe emc-pstc (without the quotes). For help, send mail to ed.pr...@cubic.com, j...@gwmail.monarch.com, ri...@sdd.hp.com, or roger.volgst...@compaq.com (the list administrators). - This message is coming from the emc-pstc discussion list. To cancel your subscription, send mail to majord...@ieee.org with the single line: unsubscribe emc-pstc (without the quotes). For help, send mail to ed.pr...@cubic.com, j...@gwmail.monarch.com, ri...@sdd.hp.com, or roger.volgst...@compaq.com (the list administrators).
RE: South North Korea Russia
Sarmad: For good details on Russian safety (and EMC) approvals, check out the RFI Labs page on the subject at: http://www.rfi.co.uk/Technical/TechPaper_Product_Cert_Russia.htm Jack Jacob Z. Schanker, P.E. Director of Agency Compliance Microwave Data Systems 175 Science Parkway Rochester, NY 14620 USA +716 242 8454 (voice) +716 241 5590 (fax) jschan...@mdsroc.com -- -- From: salba...@hns.com[SMTP:salba...@hns.com] Sent: Tuesday, October 06, 1998 10:34 AM To: emc-p...@ieee.org Subject: South North Korea Russia Hello Everyone, Does anyone have an idea on what will be the equivalent for the UL 1950 in North, South Korea and in Russia? Do they have a country specific Standard? or they follow the EN60950 ? Your help is highly appreciated. Sarmad Albanna Compliance Engineer Hughes Network Systems PH (301) 428-5705 Fax (301) 428-2835 - This message is coming from the emc-pstc discussion list. To cancel your subscription, send mail to majord...@ieee.org with the single line: unsubscribe emc-pstc (without the quotes). For help, send mail to ed.pr...@cubic.com, j...@gwmail.monarch.com, ri...@sdd.hp.com, or roger.volgst...@compaq.com (the list administrators). - This message is coming from the emc-pstc discussion list. To cancel your subscription, send mail to majord...@ieee.org with the single line: unsubscribe emc-pstc (without the quotes). For help, send mail to ed.pr...@cubic.com, j...@gwmail.monarch.com, ri...@sdd.hp.com, or roger.volgst...@compaq.com (the list administrators).
RE: FCC Statement - Spanish translation?
Neil Bennett asked: Hope someone can help. We are currently debating the need to include a Spanish translation of the FCC Statement (CFR47 Part 15) in our user manual for the US. I do not believe we have to do this, but it would be acceptable from the point of view that it demonstrates a willingness to enter into the spirit of the regulations. What spirit do US regulations have ? I haven't detected any. They don't mention using alternative languages except for a few isolated instances regarding foreign language broadcast stations. But English is mentioned quite a bit. Documentation submitted to the FCC must be in English. Does anybody have a view on this? If the manual itself is written in Spanish, or is bilingual including both English and Spanish, then obviously having the Part 15 FCC Notice in Spanish makes good sense and you should do it. If, however, the manual for your product is only in English, why on Earth would you think a Spanish language notice is appropriate ?? It isn't. Do other companies do this? I've never seen it. Is it forbidden ? You should know by now that *nothing* is forbidden in America. However, it is arguable that if you manual were entirely in Spanish, but sold in the USA, not having an English version would be forbidden. How does the Spanish speaking population view this? I'll pass on this. Would it be a waste of time? Yeah, basically I think it would be. I'm assuming that we are not talking about some consumer household appliance, but something commercial/industrial/engineering. Any comments greatly appreciated. By the way, have you thought about a French translation? After all, lots of Americans on our Northern border with Quebec and down South in Louisiana speak French. Hope this helps. Jack Jacob Z. Schanker, P.E. Director of Agency Compliance Microwave Data Systems 175 Science Parkway Rochester, NY 14620 USA +716 242 8454 (voice) +716 241 5590 (fax) jschan...@mdsroc.com --destruya antes de leer Thanks Neil Bennett Standards and Compliance Engineer GenRad Ltd - This message is coming from the emc-pstc discussion list. To cancel your subscription, send mail to majord...@ieee.com with the single line: unsubscribe emc-pstc (without the quotes). For help, send mail to ed.pr...@cubic.com, ri...@sdd.hp.com, or roger.volgst...@compaq.co (the list administrators). - This message is coming from the emc-pstc discussion list. To cancel your subscription, send mail to majord...@ieee.com with the single line: unsubscribe emc-pstc (without the quotes). For help, send mail to ed.pr...@cubic.com, ri...@sdd.hp.com, or roger.volgst...@compaq.co (the list administrators).
Frequency Allocations
A recurring question that I get asked is what are the frequency allocations in fill in country name and can our model XXX be used in Rongovia? I've acquired detailed information about many countries (Europe, Australia, etc.) but still wish there were a comprehensive database somewhere. For the USA, Bennett Kobb has an excellent spectrum guide. Does anyone know of anything comparable covering the World ? The ITU table of allocations (can be found in FCC Part 2) is too general and vague to be really useful. Any ideas or pointers ? Jack Jacob Z. Schanker, P.E. Director of Agency Compliance Microwave Data Systems 175 Science Parkway Rochester, NY 14620 USA +716 242 8454 (voice) +716 241 5590 (fax) jschan...@mdsroc.com -- - This message is coming from the emc-pstc discussion list. To cancel your subscription, send mail to majord...@ieee.com with the single line: unsubscribe emc-pstc (without the quotes). For help, send mail to ed.pr...@cubic.com, ri...@sdd.hp.com, or roger.volgst...@compaq.co (the list administrators).
RE: UL114
Professor Mohr: I looked in my latest printed catalog of UL standards and cannot find UL 114 listed. Perhaps you can explain where you came across the number and in what context ? Regards, Jacob Z. Schanker, P.E. Director of Agency Compliance Microwave Data Systems 175 Science Parkway Rochester, NY 14620 USA +716 242 8454 (voice) +716 242 8427 (fax) jschan...@mdsroc.com -- From: Hari Bruno Mohr[SMTP:h...@inep.ufsc.br] Sent: Wednesday, July 29, 1998 8:35 AM To: emc-p...@majordomo.ieee.org Subject: UL114 Dear Compliance Members, Does anyone know what is the UL114 ? I have look at the UL page but this number is not listed !!!?? I am a professor of a group of research in Power Electronics here at the Federal University of Santa Catarina at the south of Brasil. We are just begining with EMC and I would like to ask for help from members who have experiences in this field. Please contact me direct in this case. Prof. Hari Bruno Mohr Departamento de Engenharia Eletrica Universidade Federal de Santa Catarina Caixa Postal - 5119 88.040-970 - Florianopolis - SC- BRASIL Phone: +55.48.331.9204 - Fax: +55.48.234.5422 e-mail: h...@inep.ufsc.br/Internet:www.inep.ufsc.br
RE: Title for ENV 50204?
The title of ENV 50204 is: RADIATED ELECTROMAGNETIC FIELD FROM DIGITAL RADIO TELEPHONES - IMMUNITY TEST Cheers, Jacob Z. Schanker, P.E. Director of Agency Compliance California Microwave 716 242 8454 (voice) 716 242 8427 (fax) j.schan...@mdsroc.com --- -- From: miksher...@aol.com[SMTP:miksher...@aol.com] Sent: Tuesday, July 21, 1998 10:11 AM To: emc-p...@majordomo.ieee.org Subject: Title for ENV 50204? Quick question: what's the title/subject matter of ENV 50204? thanks! Mike Sherman FSI International miksher...@aol.com or msher...@fsi-intl.com
RE: FCC 101 Equivalent
Sarmad: There is no simple answer to your question. While in the USA, Part 101 covers both frequency allocation and technical performance requirement, this is not exactly the case with European specifications. For the kind of point-point microwave radios covered by Part 101, start with ETSI standards, for instance ETS 300 630, prETS 300 631, prETS 300 632, etc. You can find a catalog and description of the standards at the ETSI (European Telecommunications Standards Institute) web site at: http://www.etsi.fr If you find standards that you want, the easiest way I've found to get them is to order them from Global Documents at 800 854 7179 or http:\\global.ihs.com Be sitting down when they tell you the prices. For allocation considerations, try the European Radiocommunications Office at: http://www.ero.dk Also browse the ITU at: http://www.itu.int Hope this helps some. Jack Jacob Z. Schanker, P.E. Director of Agency Compliance California Microwave 716 242 8454 (voice) 716 242 8427 (fax) j.schan...@mdsroc.com --- -- From: salba...@hns.com[SMTP:salba...@hns.com] Sent: Thursday, July 16, 1998 6:34 PM To: emc-p...@majordomo.ieee.org Subject: FCC 101 Equivalent - Hello Everyone, Does anyone have an idea on what will be the equivalent for the FCC part 101 that describes the manner in which portions of the radio spectrum may be made available for private operations, common carrier, and local Multipoint Distribution Service fixed in Europe , or any country in Europe? Your help is highly appreciated. Sarmad Albanna Compliance Engineer Hughes Network Systems
Re: French radio and telecoms agency
Vi Van asked: Dear All, I am looking for the contact and email address for the French Radio and Telecoms Agency. Can anyone help! Thanks in Advance. Vi Van Lucent Technology Dear Vi: Try here: Mr. P. Conil Department de la Reglementation du Spectre Ministere de l'Industrie, des Postes et Telecommunications et du Commerce Exterieur 20 Avenue de Segur F-75353 PARIS 07SP France Voice +33 143 196 325 Fax: +33 143 196 337 Web: http://www.telecom.gouv.fr/english.htm I hope this helps. Jack Jacob Z. Schanker, P.E. Director of Agency Compliance California Microwave 716 242 8454 (voice) 716 242 8427 (fax) j.schan...@mdsroc.com ---
RE: NARTE Certification
Murrell: You can get a feel for what the exam consists of by getting a book titled Study Guide for Electromagnetic Compatibility Engineers by Woodrow W. Everett, III and others. It is available from The SCEEE Press, Northeast Consortium for Engineeering Education (NCEE), 1101 Massachusetts Avenue, St. Cloud, FL 34769 . Cheap, it's not. But then, they'll never make a movie of it. Well, maybe an instructional video. Regards, Jack Jacob Z. Schanker, P.E. Director of Agency Compliance California Microwave 716 242 8454 (voice) 716 242 8427 (fax) j.schan...@mdsroc.com --- ORIGINAL MESSAGE FOLLOWS: Does any one know of a course or program for the NARTE Certification? I know that there is the one day course at the IEEE EMC Symposium each year. It seems to me from what I have been told about the NARTE test that a person needs more preparation than that for this type of certification. I have contacted NARTE and they are sending me a package of information that they suggest a person study be familiar with before taking the test. This is more of a self study type of program from the way they described it. I know that there are experience requirements to take the NARTE exam or to receive the certification and that is how you are expected to pick up the information need to pass this exam. Would there be any interest in a preparatory course for the NARTE exam if such a thing does not exist? Thank you, Murrell Waldron
Conducted measurements on DC supplies
I wonder if anyone can help me with my confusion over the proper way to evaluate conducted EMC on the DC input lines to DC-DC converters. Our radios are available with a variety of slide-in modular supplies, including 24 and 48 VDC. When DC power is ordered, it is up to the customer to have a source, we don't provide a line operated DC supply. When EMC labs have measured line conducted on the DC radios, they have used either a golden or customer specified AC-DC converter (i.e., DC power supply) and placed the LISN between the AC side of that supply and the mains. Any conducted noise produced by the supply itself is subtracted out supposedly leaving any noise put out by the radio and its DC-DC converter. We are now looking at some DC-DC converters for their conducted noise levels. The power supply manufacturer is measuring noise by using a standard 50 uH LISN on the DC input line (as opposed to the AC supply line). Is this generally considered an acceptable method of measurement? On the one hand, you are looking at the noise where it first appears, but on the other hand, regulatory concern is for noise getting back into the mains. Also, are the 50 uH chokes in commercial LISNs typically air core so that they can carry DC without saturation ? Our ultimate requirements are to meet FCC Part 15 and EN 55022. What are the gorup's opinions ? Thanks, Jack Jacob Z. Schanker, P.E. Director of Agency Compliance California Microwave 716 242 8454 (voice) 716 242 8427 (fax) j.schan...@mdsroc.com ---
Company rewards for publishing
This is a bit off the purpose of the list, for which I apologize. You can stop reading now if you like. My company currently has no policy on, nor rewards for, publishing or presenting papers or articles. I want to propose initiating a policy. This would be greatly helped by knowing examples of what other companies do in this regard. Your comments on any of the following would be appreciated. 1) Is there a policy? 2) Is there a reward for publishing such as cash, gift, or recognition dinner ? 3) Are all papers/conferences/publications treated equally, or would a paper in the IEEE Transactions on EMC have a different reward than having an article appear in a controlled-circulation trade magazine? Thanks, Jack Jacob Z. Schanker, P.E. Director of Agency Compliance California Microwave 716 242 8454 (voice) 716 242 8427 (fax) j.schan...@mdsroc.com --- 4) Do you think this is a good idea or should I drop it?
RE: generating 50Hz power in the US
Richard: Your electrician may well have the best solution. A 60 Hz to 50 Hz motor generator set is a common solution to your problem. There are also solid state power converters available. In particular, Panel Components Corporation in Oskaloosa Iowa sells at least three models. Their Model 85510620 will handle a maximum of 1250 VA, which may be enough for one of your devices, but not four. The cost is about $3500, which you can compare to the MG approach. They will also rent on a monthly basis. Phone is 515 673 5000, fax is 515 673 5100. Consider this: 1) you may want to test at 50 Hz plus or minus a few Hertz, so the MG must have a variable speed drive. 2) you may want to test at 220, 230, and 240 volts, and plus or minus 5 to 10 percent about each. So you will need a big Variac, or tapped transformer. I hope this helps some. Jack Jacob Z. Schanker, P.E. Director of Agency Compliance California Microwave 716 242 8454 (voice) 716 242 8427 (fax) j.schan...@mdsroc.com ---original follows -- From: Richard Cass[SMTP:richard_c...@iris.scitex.com] Sent: Friday, June 12, 1998 9:37 AM To:emc-p...@majordomo.ieee.org Subject: generating 50Hz power in the US We want to do ongoing testing of an ITE product (here in the US) on 220 VAC 50Hz power to simulate the European environment to make sure our power supply vendor is doing his job. In this esteemed group's experience, what is best (i.e easiest, cheapest, most reliable) way to set this up. I have an electrician describing scenarios of a 60Hz electric motor mechanically driving a 50Hz generator. In this age of high power solid state electronics, I gotta believe there's a better way. Please keep answers simple as I am only a lowly mechanical engineer (analogies to water running through pipes always is always big help to me). At 120VAC our products pull 6 amps peak at start up and only 3 amps running. I would never test more than 4 products at a time. Thanks in advance for the usually invaluable help that I get from this group. Richard Cass Iris Graphics, Inc.
Central versus distributed power supplies
My quick take on Gary's question (below) of central versus distributed power supplies is that I suspect his suspicions are correct. My experience says that distributed supplies are a better solution from an EMC standpoint (but not necessarily from a cost standpoint). The real answer is that it depends. The trick is in identifying the factors on which it depends. That's what engineering is all about. Either approach can be made to work given enough effort. Cheers, Jacob Z. Schanker, P.E., CPEng Director of Agency Compliance California Microwave 716 242 8454 (voice) 716 242 8427 (fax) j.schan...@mdsroc.com --- original message follows: Hi EMCers, For PSUs for each of say 17 cards in a telecoms 19 rack, an alternative is one PSU card at the end of the rack. However this means long (backplane?) busses of supplies. I suspect that EMI would be worse for the alternative central PSU solution. Is this the case in anyones experience? And are there solutions offerable with such a brief brief? And any literature on WEB or elsewhere? Thanks in advance Gary. ___ ___ ___ ___ /__/| /\/__/| /\ /__/\ /__/\/\ /| | |/ /\ \ | |//\ \ / _\/ / \ | |\ \|| |-- /__\/\ |-- \ /__\/\ | /__/ | | | | \ || |/ /\/ |/ \/ /\/ \__|| \__/_/ |/ \|/ |/ ELECTRONIC SOFTWARE DESIGN AND DEVELOPMENT ~~~ Gary Allen ~~~ ~~ Graduate Hardware Engineer ~ ~~ ~ ~~~ Paragon Solutions Ltd. ~ Web Site www.paragon.co.nz~ ~~ ~~~ PO Box 30 449~ ~~ ~ Time Zone GMT + 12 hours~~ ~ ~~~ Lower Hutt ~ ~ ~~~ Voice direct +64 04 570 3875~~ ~ ~~~ Wellington. ~~ ~~ Fax +64 04 570 3888 ~~ ~~ ~~~ New Zealand~~~ ~ Email ga...@paragon.co.nz ~~~ ~~ ` `
FW: What is Class 1, Div. 1 Group D?
Jim: If you have to ask, chances are your products are not compliant, much less approved. A source for information is a safety approval agency such as UL, Factory Mutual, or CSA. Call them or check their web sites for free information. In short, Class I (roman numeral I) is an area where flammable gases, vapors, or liquids may be present. Division 1 is where ignitable concentrations of flammable gases, vapors, or liquids can exist all of the time or some of the time under normal operating conditions. Group D tells you that the gas in question is propane. To be compliant, a product must be designed, and tested by an approved agency to demonstrate that sparks, or excessive operating temperatures which could cause ignition of the gas, do not exist, and cannot exist even with a fault. Hope this helps. I suggest you tell the customer NO. Jacob Z. Schanker, P.E. Director of Agency Compliance California Microwave 716 242 8454 (voice) 716 242 8427 (fax) j.schan...@mdsroc.com --- -- From: bach...@ccmail.mmsday.com[SMTP:bach...@ccmail.mmsday.com] Sent: Tuesday, June 09, 1998 8:14 AM To:emc-p...@majordomo.ieee.org Subject: What is Class 1, Div. 1 Group D? Yesterday we had a customer call asking if our products were Class 1, Div. 1, Group D compliant. Can anyone tell me where I can get information on what it is and what it takes to meet it? Jim Bacher Paxar-Monarch bach...@monarch.com
FW: Need European Rep.
Try contacting: Technology International (Europe) Limited 41 Shrivenham Hundred Business Park Shrivenham, Swindon SN6 8TZ England Tel: 44 1793 783137 Fax: 44 1793 782310 Martin Green is the Managing Director. They have an associated company which acts as a front European entity for CE mark Declarations and files. Jacob Z. Schanker, P.E. Director of Agency Compliance California Microwave 716 242 8454 (voice) 716 242 8427 (fax) j.schan...@mdsroc.com --- -- From: Gary Labadie[SMTP:glaba...@acromag.com] Sent: Monday, June 08, 1998 6:10 PM To:emc-p...@ieee.org Subject: Need European Rep. I have a product that is CE marked. It is designed exclusively for an OEM to be sold into the European Union. The OEM wishes not to be the holding company at this point. Since, it is designed for an OEM account, I cannot use are standard sales channels of reps and distributors to hold the Declaration of Conformity or the Technical file in Europe. Does anybody know a reputable organization that would offer this service and the approximate dues that are required? Best Regards, Gary Labadie Marketing Acromag, Inc. 30765 Wixom Rd.Ph: (248)624-1541 ext. 205 P.O. Box 437 Fax:(248)624-9234 Wixom, MI 48393Email: glaba...@acromag.com
