RE: Compliance test configuration
Hello Rachid, Thank you very much for your reply. In this case, the EUT is the disk drive, which is connected to SCSI Adapter through the SCSI interface. The 64-bit interface is strictly between the PC and the SCSI Adapter, and does not affect the transfer rate between Adapter and the disk drive. The only benefit of using 64-bit interface is to sustain the data rate when connected to a large number of disk drives. I would assume that as long as I am transferring data between Adapter and the disk drive at the maximum transfer rate, the type of interface between Adapter and PC (both of which are already agency approved) should not matter. Regards, Ravinder Server PCB and Flex Development Hitachi Global Storage Technologies Email: ravinder.ajm...@hgst.com Rachid Sehb rs...@rheintech.com 09/03/2003 05:34 PM To:'ravinder.ajm...@hgst.com' ravinder.ajm...@hgst.com cc: From:Rachid Sehb rs...@rheintech.com Subject:RE: Compliance test configuration Hello Ajmani, In most cases the standard would like the worst case to be tested, so my advice would be to test the 64 bits. Rachid Sehb EMC engineer mailto:rs...@rheintech.com mailto:rs...@rheintech.com Rhein Tech Laboratories, Inc. http://www.rheintech.com/ http://www.rheintech.com Electro Magnetic Engineering and Testing, Wireless Testing, Electrical Safety Testing, PCB and Hardware Design Engineering 360 Herndon Parkway, Suite 1400, Herndon, VA 20170 Tel: 703-689-0368 x127 ; Fax: 703-689-2056 The information contained in this electronic mail message is privileged and confidential, and is intended only for use of the addressee. If you are not the intended recipient, you are hereby notified that any disclosure, reproduction, distribution or other use of this communication is strictly prohibited. If you have received this communication in error, please notify the sender by reply transmission and delete the message without copying or disclosing it. From: ravinder.ajm...@hgst.com [mailto:ravinder.ajm...@hgst.com] Sent: Wednesday, September 03, 2003 3:08 PM To: 'emc-p...@majordomo.ieee.org' Subject: Compliance test configuration Hi EMC Experts, I want to test a U320 SCSI disk drive for agency compliance. All the U320 SCSI Host Bus Adapters require 64-bit PCI slot, although they will also work in the 32-bit slot. My question is do I have to use a PC with 64-bit PCI bus for my testing (these PCs are hard to come by), or can I use a PC with 32-bit PCI bus. I will appreciate your advice in helping me decide this. Regards, Ravinder Server PCB and Flex Development Hitachi Global Storage Technologies Email: ravinder.ajm...@hgst.com
Battery pack for Schaffner NSG 435 ESD simulator
Folks, we have a need for a second battery pack for Schaffner NSG 435 ESD simulator. Other than Schaffner (which is a bit pricey), is there anyone else out there who makes these battery packs? Regards, Naftali Shani, Catena Networks (www.catena.com http://www.catena.com ) 307 Legget Drive, Ottawa, Ontario, Canada K2K 3C8 613.599.6430/866.2CATENA (X.8277); C 295.7042; F 599.0445 E-mail: nsh...@catena.com mailto:nsh...@catena.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: emc_p...@symbol.com For policy questions, send mail to: Richard Nute: ri...@ieee.org Jim Bacher: j.bac...@ieee.org Archive is being moved, we will announce when it is back on-line. All emc-pstc postings are archived and searchable on the web at: http://www.ieeecommunities.org/emc-pstc
Compliance test configuration
Hi EMC Experts, I want to test a U320 SCSI disk drive for agency compliance. All the U320 SCSI Host Bus Adapters require 64-bit PCI slot, although they will also work in the 32-bit slot. My question is do I have to use a PC with 64-bit PCI bus for my testing (these PCs are hard to come by), or can I use a PC with 32-bit PCI bus. I will appreciate your advice in helping me decide this. Regards, Ravinder Server PCB and Flex Development Hitachi Global Storage Technologies Email: ravinder.ajm...@hgst.com
Re: Conformal Coatings
Michael, Back when I used to design coin operated games we had a problem with intentional ESD doing damage to the electronics. Turns out, that ESD would, every now and then, give a free game. Being rewarded with free games, they quickly learned a damaging ritual - the kids would link arms, up to six of them, scuff their feet around the carpeting and then discharge to the machine through a quarter to really blast the machine. More than likely they killed the machine, but what did they care? First thing I did was make the electronics extremely robust for ESD, *THEN* I modified the software so the slightest (interpret that to mean so low level that it wasn't damaging) ESD event simply reset the game, even erased accumulated games. They lost their money. Never had problems after that. The next time we watched a field installation, you couldn't believe how the kids protected those machines from even the most accidental of discharges. Like yelling at another kid to keep away while he's playing the game. Anyway, it was one way to get the customer to help protect your electronics. It's all in the reward/punishment system. - Robert - Robert A. Macy, PE .. m...@california.com 408 286 3985 . . . .. . . fx 408 297 9121 AJM International Electronics Consultants 101 E San Fernando, Suite 402 San Jose, CA 95112 On Wed, 3 Sep 2003 10:31:58 -0500 Sosnoski, Michael gl...@wmsgaming.com wrote: Ladies Gentlemen, I am wondering if you have ever heard or know of any printed circuit board conformal coatings that are better than others for protecting against ESD? Are some just better than others for anything? Not that we don't use proper grounding, shielding board layout techniques, but this industry is concerned with deliberate, and intentional stimuli to the equipment, and the more robust I can make the boards, connectors, etc,.. the better. Also, as in any commercial industry--the accountants Thanks, Mike --- 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: emc_p...@symbol.com For policy questions, send mail to: Richard Nute: ri...@ieee.org Jim Bacher: j.bac...@ieee.org Archive is being moved, we will announce when it is back on-line. All emc-pstc postings are archived and searchable on the web at: http://www.ieeecommunities.org/emc-pstc 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: emc_p...@symbol.com For policy questions, send mail to: Richard Nute: ri...@ieee.org Jim Bacher: j.bac...@ieee.org Archive is being moved, we will announce when it is back on-line. All emc-pstc postings are archived and searchable on the web at: http://www.ieeecommunities.org/emc-pstc
Conformal Coatings
Ladies Gentlemen, I am wondering if you have ever heard or know of any printed circuit board conformal coatings that are better than others for protecting against ESD? Are some just better than others for anything? Not that we don't use proper grounding, shielding board layout techniques, but this industry is concerned with deliberate, and intentional stimuli to the equipment, and the more robust I can make the boards, connectors, etc,.. the better. Also, as in any commercial industry--the accountants Thanks, Mike 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: emc_p...@symbol.com For policy questions, send mail to: Richard Nute: ri...@ieee.org Jim Bacher: j.bac...@ieee.org Archive is being moved, we will announce when it is back on-line. All emc-pstc postings are archived and searchable on the web at: http://www.ieeecommunities.org/emc-pstc
RE: Hi-Pot testing
Chris, As a manufacturer of surge protection devices, I can relate to what you have experienced. In the safety testing of the design, a hi-pot is performed to without the surge components to ensure a good design. In product, we have three different requirements from our safety agencies (UL and CSA). 1. No hipot is required as it was performed on the initial design. (DO NOT LIKE THIS ONE) 2. Hi-pot the product before the surge components are installed. 3. Hi-pot the product using a power supply with a limited current of 1 mA. Requirements 2 and 3 work well. With your set-up of a MOV/GDT, you may experience some problems with Requirement 3 unless you have balanced the capacitance between the MOV/GDT. Until the capacitance was balanced between these devices, our product failure rate in hi-pot remained high. Once the capacitance of the MOV/GDT has been balanced, you also have to re-examine the surge response. If you have any questions, please let me know. Thanks, Bryan. From: Chris Maxwell To: EMC-PSTC Internet Forum Sent: 8/28/03 11:45 AM Subject: Hi-Pot testing All, We have a product that runs from AC power. During safety testing at the lab, the unit passes HiPot testing. However, the unit is broken by the testing. Rigorously, the unit passes its type testing because it doesn't become unsafe by the Hipot. However, it isn't functional after the test; and it requires repair. The unit does meet surge test requirements. (EN 61000-4-5, Class II). The unit has surge protection circuitry installed from line to earth (MOV in line with a gas tube). This surge protection is disabled before the hipot test. So, here are a few of my random thoughts on this process. 1. I can't break every unit by hipot testing it before I ship it. 2. When the unit is in the field, it will have the surge protection installed, which will essentially limit any real life hipot voltages to about 500V (230V gas tube, 275VAC MOV). In real life, the unit would experience a maximum 500V hipot. However, in the case of a single fault (surge protection disabled), the unit could experience higher hipot voltages, which would cause damage, but not an unsafe condition (as shown by type testing). 3. The surge protection is not easily removed for hipot and then reinstalled after hipot. So...are there any alternative test or inspection methods that can be used on this product? Thanks in advance, Chris Maxwell | Design Engineer - Instruments Group email chris.maxw...@nettest.com | dir +1 315 266 5128 | fax +1 315 797 8024 NetTest | 6 Rhoads Drive, Utica, NY 13502 | USA web www.nettest.com | tel +1 315 797 4449 | 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: emc_p...@symbol.com For policy questions, send mail to: Richard Nute: ri...@ieee.org Jim Bacher: j.bac...@ieee.org Archive is being moved, we will announce when it is back on-line. All emc-pstc postings are archived and searchable on the web at: http://www.ieeecommunities.org/emc-pstc 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: emc_p...@symbol.com For policy questions, send mail to: Richard Nute: ri...@ieee.org Jim Bacher: j.bac...@ieee.org Archive is being moved, we will announce when it is back on-line. All emc-pstc postings are archived and searchable on the web at: http://www.ieeecommunities.org/emc-pstc
RE: Server Test
Dave, for those of us who have e-mail clients that can read html, or rtf yes it will work. However, there are a significant number of people who will not be able to view what you send. For those on the list who are in countries where they do not have a good telecom infrastructure, it also causes download issues for them (larger files take longer to download). Not everyone on this list has access to high speed modems or DSL/Cable/T1 lines. Some of the people on this list are still lucky to get a 1200 baud connection. HTML and RTF also causes issues with our archive. The preferred method is to post text only (hints: If you do not see our footer at the bottom of an e-mail from the list, then it was not sent in plain text. If you see any color or different fonts, it was not sent in plain text.) We also have a number of people on the list who do a lot of traveling. By keeping the e-mails in plain text it helps them keep their expenses down when they are traveling. The best way to deal with such issues is to post it on the new communities site (which is noted at the bottom of this e-mail) and then send a text message to this list that you have placed it there. That allows you to provide formulas, etc. in a readable format that everyone can access on the website. Jim Jim Bacher, Senior Engineer Paxar Americas, Inc. e-mail: jim.bac...@paxar.com voice: 1-937-865-2020 fax: 1-937-865-2048 From: drcuthb...@micron.com [mailto:drcuthb...@micron.com] Sent: Tuesday, September 02, 2003 7:33 PM To: emc-p...@ieee.org Subject: Test to see if Microsoft Equation Writer will work thru this email server Dave Cuthbert Micron Technology 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: emc_p...@symbol.com For policy questions, send mail to: Richard Nute: ri...@ieee.org Jim Bacher: j.bac...@ieee.org Archive is being moved, we will announce when it is back on-line. All emc-pstc postings are archived and searchable on the web at: http://www.ieeecommunities.org/emc-pstc
Rohde Schwarz Direction coupler
Hi Group, I have an old Rohde Schwarz Direction coupler/Reflektometer, type ZUP. Could anyone supply me with copy of the datasheet for this device? Best regards Helge Knudsen Test Approval Niros Telecommunication Hirsemarken 5 DK-3520 Farum Tel +45 44 34 22 51 Fax +45 44 99 28 08 email h.knud...@niros.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: emc_p...@symbol.com For policy questions, send mail to: Richard Nute: ri...@ieee.org Jim Bacher: j.bac...@ieee.org Archive is being moved, we will announce when it is back on-line. All emc-pstc postings are archived and searchable on the web at: http://www.ieeecommunities.org/emc-pstc
Re: Q. on Res Bandwith performace traceabiity
I read in !emc-pstc that Coleman, David david.cole...@racalinst.co.uk wrote (in 7103C9D213EBD111971400104B4968149EC0CD@ntexch- f.racalinst.co.uk) about 'Q. on Res Bandwith performace traceabiity' on Wed, 3 Sep 2003: Why would the IEC standard for miniature fuses detail these abbreviations??? I think you have the wrong standard! Yes, typo, sorry. IEC 60027-3. -- 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: emc_p...@symbol.com For policy questions, send mail to: Richard Nute: ri...@ieee.org Jim Bacher: j.bac...@ieee.org Archive is being moved, we will announce when it is back on-line. All emc-pstc postings are archived and searchable on the web at: http://www.ieeecommunities.org/emc-pstc
RE: ADSL Conduct emission
Sergio, CISPR22:1998 allows in Table 4, Note 3 a relaxation of the limit by 10dB over the freq. range of 6MHz-30MHz if the common mode signal is due to the conversion by the cable of the wanted (ADSL) signal. Even when using the ISN for Cat 3 cable (ISN 50/25), I've never seen these problems. It looks like there is a serious unbalance in your circuit or within the conducted emission measuring devices. Vriendelijke Groeten, Best regards, Meilleures salutations, Kristiaan Carpentier Regulatory and Approval Engineer Thomson multimedia Broadband Belgium N.V., S.A. Prins Boudewijnlaan 47, B-2650 Edegem, Belgium Tel: +32 3 443 6407 - Fax: +32 3 443 6632 e-mail: kristiaan.carpent...@thomson.net www.speedtouch.com From: SERGIO LUIZ DA ROCHA LOURES [mailto:sergio.lou...@siemens.com] Sent: dinsdag 2 september 2003 19:46 To: emc-p...@majordomo.ieee.org Subject: ADSL Conduct emission Dear group During a conducted emission test in an ADSL interface, we have the 1.5MHz signal and its multiples within the 0.15-30MHz range. It's a differential signal, but there is a common mode signal present. How about the CISPR limits in this case? May I ignore the ADSL signal if it's higher than the limits? Regards Sérgio L. Rocha Loures IC SC QP Q - Quality Assurance Supply Chain - Quality and Processes SIEMENS (Tel: +55 41 341-5898 ÊFax: +55 41 341-5058 mailto:*sergio.lou...@siemens.com *sergio.lou...@siemens.com Minha opinião e não necessariamente a do meu empregador.
RE: Q. on Res Bandwith performace traceabiity
John, Why would the IEC standard for miniature fuses detail these abbreviations??? I think you have the wrong standard! Dave C. From: John Woodgate [mailto:j...@jmwa.demon.co.uk] Sent: Wednesday, September 03, 2003 7:42 AM To: emc-p...@majordomo.ieee.org Subject: Re: Q. on Res Bandwith performace traceabiity I read in !emc-pstc that Brent DeWitt bdew...@ix.netcom.com wrote (in jfekiiblahflflapjdmdeecadfaa.bdew...@ix.netcom.com) about 'Q. on Res Bandwith performace traceabiity' on Tue, 2 Sep 2003: Are we done now? No. All you guys are using non-standard abbreviations. Go read IEC 60127-3. (;-) -- 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: emc_p...@symbol.com For policy questions, send mail to: Richard Nute: ri...@ieee.org Jim Bacher: j.bac...@ieee.org Archive is being moved, we will announce when it is back on-line. All emc-pstc postings are archived and searchable on the web at: http://www.ieeecommunities.org/emc-pstc ** IMPORTANT NOTICE The information contained in this e-mail is confidential. It may also be legally privileged. It is intended only for the stated addressee(s) and access to it by any other person is unauthorised. If you are not an addressee, you must not disclose, copy, circulate or in any other way use or rely on the information contained in this e-mail. Such unauthorised use may be unlawful. If you have received this e-mail in error, please inform Racal Instruments Group Ltd. immediately by emailing postmas...@racalinstrumentsgroup.co.uk or phoning +44 (0)1202 872800 (ask for the I.T. Dept.) and delete it and all copies from your system. www.racalinstrumentsgroup.co.uk ** 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: emc_p...@symbol.com For policy questions, send mail to: Richard Nute: ri...@ieee.org Jim Bacher: j.bac...@ieee.org Archive is being moved, we will announce when it is back on-line. All emc-pstc postings are archived and searchable on the web at: http://www.ieeecommunities.org/emc-pstc
Re: Q. on Res Bandwith performace traceabiity
I read in !emc-pstc that Brent DeWitt bdew...@ix.netcom.com wrote (in jfekiiblahflflapjdmdeecadfaa.bdew...@ix.netcom.com) about 'Q. on Res Bandwith performace traceabiity' on Tue, 2 Sep 2003: Are we done now? No. All you guys are using non-standard abbreviations. Go read IEC 60127-3. (;-) -- 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: emc_p...@symbol.com For policy questions, send mail to: Richard Nute: ri...@ieee.org Jim Bacher: j.bac...@ieee.org Archive is being moved, we will announce when it is back on-line. All emc-pstc postings are archived and searchable on the web at: http://www.ieeecommunities.org/emc-pstc
Re: Q. on Res Bandwith performace traceabiity
I read in !emc-pstc that f...@dctolight.net wrote (in 41196.198.246.16. 251.1062534076.squir...@webmail.dctolight.net) about 'Q. on Res Bandwith performace traceabiity' on Tue, 2 Sep 2003: Since not everyone measures power we also define 0dbv = 1 mvolt into 600 ohms. Well, you might define it like that, but I hope that no-one else does. There is an international standard (IEC 60127-3) on the forms of decibel abbreviations, and 'dbv' is non-compliant. Many people define '0 dbv' as 1 volt, impedance not specified. If you use non-standard abbreviations, you WILL be misunderstood, as in this case. Abbreviations are 'words' in our technical language, and using the wrong word will obviously cause giraffe, no, I mean confusion. -- 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: emc_p...@symbol.com For policy questions, send mail to: Richard Nute: ri...@ieee.org Jim Bacher: j.bac...@ieee.org Archive is being moved, we will announce when it is back on-line. All emc-pstc postings are archived and searchable on the web at: http://www.ieeecommunities.org/emc-pstc
