RE: CISPR 22 equal to EN55022?
dont believe the catalogue andy -Original Message- From: Colgan, Chris [mailto:chris.col...@tagmclarenaudio.com] Sent: 09 July 1999 09:44 To: 'Richard Cass'; 'emc-p...@majordomo.ieee.org' Subject: RE: CISPR 22 equal to EN55022? Hi Rich According the my British Standards catalogue, EN 55022:1994 and CISPR 22:1993 are technically identical though some of the wording or presentation may differ. The same applies to EN55022:1998 and CISPR 22:1997. Hope this helps, I'll send you the bill :) Chris Colgan EMC Safety TAG McLaren Audio Ltd mailto:chris.col...@tagmclarenaudio.com -Original Message- From: Richard Cass [SMTP:richard_c...@irisinc.scitex.com] Sent: 08 July 1999 22:00 To: 'emc-p...@majordomo.ieee.org' Subject: RE: CISPR 22 equal to EN55022? Surprisingly, I never got an answer on this. Perhaps many of thought that it was so simple that someone was bound to answer. For the exorbitant cost of this service you would think that I would get better service than this. ;-) Rich C. -Original Message- From: Richard Cass [mailto:richard_c...@irisinc.scitex.com] Sent: Friday, June 18, 1999 3:55 PM To: 'emc-p...@majordomo.ieee.org' Subject: CISPR 22 equal to EN55022? Neophyte question of the week. If a supplier of a product claims compliance to CISPR 22, is this exactly equivalent to EN55022 (assuming you have met all the latest amendments) for the purposes of CE marking? - 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). = Authorised on 07/09/99 at 09:44:17; code 374534412416DE9E. - 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: CISPR 22 equal to EN55022?
Hi Rich According the my British Standards catalogue, EN 55022:1994 and CISPR 22:1993 are technically identical though some of the wording or presentation may differ. The same applies to EN55022:1998 and CISPR 22:1997. Hope this helps, I'll send you the bill :) Chris Colgan EMC Safety TAG McLaren Audio Ltd mailto:chris.col...@tagmclarenaudio.com -Original Message- From: Richard Cass [SMTP:richard_c...@irisinc.scitex.com] Sent: 08 July 1999 22:00 To: 'emc-p...@majordomo.ieee.org' Subject: RE: CISPR 22 equal to EN55022? Surprisingly, I never got an answer on this. Perhaps many of thought that it was so simple that someone was bound to answer. For the exorbitant cost of this service you would think that I would get better service than this. ;-) Rich C. -Original Message- From: Richard Cass [mailto:richard_c...@irisinc.scitex.com] Sent: Friday, June 18, 1999 3:55 PM To: 'emc-p...@majordomo.ieee.org' Subject: CISPR 22 equal to EN55022? Neophyte question of the week. If a supplier of a product claims compliance to CISPR 22, is this exactly equivalent to EN55022 (assuming you have met all the latest amendments) for the purposes of CE marking? - 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). = Authorised on 07/09/99 at 09:44:17; code 374534412416DE9E. - 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: CISPR 22 equal to EN55022?
Mirko. All resistibility tests were removed from the EN as resistibility does not come under the EMC Directive. You have to buy the EN to see it. Regards.Andy -Original Message- From: Matejic, Mirko [mailto:mmate...@foxboro.com] Sent: 08 July 1999 22:34 To: 'Richard Cass'; 'emc-p...@majordomo.ieee.org' Subject: RE: CISPR 22 equal to EN55022? Rich, I'm not aware of differences. Potential for difference exists during transitions, it takes some time for EN 55022 to follow Amendments to CISPR 22 or new editions. Mirko Matejic -Original Message- From: Richard Cass [SMTP:richard_c...@irisinc.scitex.com] Sent: Thursday, July 08, 1999 2:00 PM To: 'emc-p...@majordomo.ieee.org' Subject: RE: CISPR 22 equal to EN55022? Surprisingly, I never got an answer on this. Perhaps many of thought that it was so simple that someone was bound to answer. For the exorbitant cost of this service you would think that I would get better service than this. ;-) Rich C. -Original Message- From: Richard Cass [mailto:richard_c...@irisinc.scitex.com] Sent: Friday, June 18, 1999 3:55 PM To: 'emc-p...@majordomo.ieee.org' Subject: CISPR 22 equal to EN55022? Neophyte question of the week. If a supplier of a product claims compliance to CISPR 22, is this exactly equivalent to EN55022 (assuming you have met all the latest amendments) for the purposes of CE marking? - 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). - 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: CISPR 22 equal to EN55022?
IMHO, As I understand it the latest Amendments of CISPR22 are not necessarily in EN55022. Indeed they may be modified or rejected by the EU and so they may NOT be the same. Thank you Charles Grasso StorageTek 2270 Sth 88th Street Louisville CO 80027 Tel: (303)673-2908 Fax(303)661-7115 -- From: Richard Cass[SMTP:richard_c...@irisinc.scitex.com] Sent: Thursday, July 08, 1999 1:59 PM To: 'emc-p...@majordomo.ieee.org' Subject: RE: CISPR 22 equal to EN55022? Surprisingly, I never got an answer on this. Perhaps many of thought that it was so simple that someone was bound to answer. For the exorbitant cost of this service you would think that I would get better service than this. ;-) Rich C. -Original Message- From: Richard Cass [mailto:richard_c...@irisinc.scitex.com] Sent: Friday, June 18, 1999 3:55 PM To: 'emc-p...@majordomo.ieee.org' Subject: CISPR 22 equal to EN55022? Neophyte question of the week. If a supplier of a product claims compliance to CISPR 22, is this exactly equivalent to EN55022 (assuming you have met all the latest amendments) for the purposes of CE marking? - 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). - 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).
Fw: EMC Engineers
Posted for ANDREW ROBERTS arobe...@newbridge.com: From: ANDREW ROBERTS arobe...@newbridge.com Subject: EMC Engineers Date: Thu, 08 Jul 1999 16:34:07 -0400 To: TREG t...@world.std.com, EMC-PSTC emc-p...@ieee.org, NEBS n...@world.std.com Company: Newbridge Networks Corporation Division: Research and Development Location: Kanata (near Ottawa), Ontario, CANADA Qualifications: Technologist/Bachelor of Engineering or equivalent education plus experience. Newbridge Networks Corp. is looking for EMC Engineers in our Ottawa, Canada facility. Responsibilities include assisting in the design of state-of-the-art ATM, IP and wireless networking products for compliance to FCC Part 15, FCC Part 101, Industry Canada ICES-003, IEC 61000 series, BELLCORE GR-1089-CORE EN/ETSI EMC standards. The successful candidate will also interface with regulatory agencies and participate in standards development. Other responsibilities include consulting and educating the design community, writing guidelines, performing EMC tests and preparing test reports. Experience in numerical analysis techniques and SI, although not necessary, would be a plus. APPLICATION PROCEDURE: If you believe it's better to lead than to follow, Newbridge is the place to be. Start by sending your resume (via mail, fax or e-mail) to: Andrew Roberts, Manager EMC Approvals, Newbridge Networks Corporation, 600 March Road, P.O. Box 13600, Kanata, Ontario, K2K 2E6. Fax (613) 599-3654. E-mail: arobe...@newbridge.com. Newbridge is an ISO 9001 certified organization. ---End of Original Message- -- Ed Price ed.pr...@cubic.com Electromagnetic Compatibility Lab Cubic Defense Systems San Diego, CA. USA 619-505-2780 List-Post: emc-pstc@listserv.ieee.org Date: 07/08/1999 Time: 16:31:31 Military Avionics EMC Services Our Specialty Also Environmental / Metrology / Reliability -- - 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: Inherently Limited power source..
A good example would be a transformer. The current output can be limited by the resistance of the winding as well as the mutual inductance between the windings. Of course, increasing the resistance of the windings to limit the output may cause temperature problems. But any competent transformer company can build an inherently limited unit for you. -- From: sparaci...@andovercontrols.com [SMTP:sparaci...@andovercontrols.com] Sent: Friday, July 09, 1999 9:15 AM To: emc-p...@ieee.org Subject: Inherently Limited power source.. Hello all, The standard that I'm working with states under Power Limited Circuits that: an Inherently Limited power source does not require overcurrent protection, while a Not Inherently Limited power source does require it. Could someone give me an explanation of what makes a power source Inherently Limited.. Thank You, George - 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).
Video protocols..
Good Morning, I am dealing with two video formats for video cameras and monitors, Pal NTSC. Pal is primarily used throughout Europe and NTSC is used in USA, Canada, Mexico and Japan. Does anyone know of any other countries that may use NTSC ? Thanks, George - 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: Inherently Limited power source..
Hello George, An Inherently Limited power source is one in which the impedance of the source, typically a transformers' primary or secondary, is such that the available output is limited within the constraints of low energy as defined by a standard. UL 1585, for example, describes the limits/requisites for such a trafo design and the means for determining the power available. There is also an IEC standard for such transformers, but it's number does not come to mind at this instant. I'm certain someone else on this listserver can provide that bit of info. I also believe that if a non-accessible, non-replaceable current limiting device (film-resistor, fuse or ptc, for example) is housed within the transformer, the output can also be determined to be Inherently Limited. Also, if considering an Inherently Limited power source, other than a transformer, the same principles apply. Regards, Art Michael * * * * * * * * * * * * * * * * * * * * * * * International Product Safety Bookshop * * Check out our current offerings! * *Save 25% on the NEW EMC Encyclopedia * * * * http://www.safetylink.com/bookshop.html * * * * Another service of the Safety Link* * www.safetylink.com * * * * * * * * * * * * * * * * * * * * * * * On Fri, 9 Jul 1999 sparaci...@andovercontrols.com wrote: Hello all, The standard that I'm working with states under Power Limited Circuits that: an Inherently Limited power source does not require overcurrent protection, while a Not Inherently Limited power source does require it. Could someone give me an explanation of what makes a power source Inherently Limited.. Thank You, George - 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).
Inherently Limited power source..
Hello all, The standard that I'm working with states under Power Limited Circuits that: an Inherently Limited power source does not require overcurrent protection, while a Not Inherently Limited power source does require it. Could someone give me an explanation of what makes a power source Inherently Limited.. Thank You, George - 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 Detective and Flushing Toilet
Is this a joke? -Original Message- From: b...@namg.us.anritsu.com [mailto:b...@namg.us.anritsu.com] Sent: Wednesday, December 31, 1969 6:00 PM To: emc-p...@ieee.org Subject: EMC Detective and Flushing Toilet Greeting to the group, EMC engineers in a PC maker received a customer's complains transferred from technical support group that every time he flushes toilet his PC always reboots. Assuming you were one of EMC engineers, please participate the discussion and try to answer following questions: (1) Fabricate an EMC story to relate the cause (Flushing toilet) to the effect (Rebooting PC). (2) Direct the customer to verify your speculation. (3) Fix the problem. Barry Ma - 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: EMC Detective and Flushing Toilet
Off the top of my head I guess I would have to assume that it has to do with power delivery rather than a data line spike. A spike into one of the data I/O would be more likely disrupt the current application and maybe cause a program lock-up but should cause a re-boot. Flushing water may create an ESD event somewhere but not a strong candidate to me, neither is the idea of shorting or something along that line. My first guess would be that the flushing turns on some other equipment like a pump that sits on the same circuit as the computer. I might ask if the toilet in particular is located below the septic or sewer system. If so the waste has to be pumped uphill into the outflow lines. Possibly the inrush current causes a power glitch which resets the computer. I'd love to hear how this one comes out. It also brings up the old computer adage. Garbage in Garbage out Gary -Original Message- From: b...@namg.us.anritsu.com [SMTP:b...@namg.us.anritsu.com] Sent: Wednesday, December 31, 1969 3:00 PM To: emc-p...@ieee.org Subject:EMC Detective and Flushing Toilet Greeting to the group, EMC engineers in a PC maker received a customer's complains transferred from technical support group that every time he flushes toilet his PC always reboots. Assuming you were one of EMC engineers, please participate the discussion and try to answer following questions: (1) Fabricate an EMC story to relate the cause (Flushing toilet) to the effect (Rebooting PC). (2) Direct the customer to verify your speculation. (3) Fix the problem. Barry Ma - 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: EMC Detective and Flushing Toilet
Barry: I would be tempted to say that the reboot is actually an undocumented feature in which bad data is automatically flushed from the system. But this actually sounds like a clear case of hydraulic hammer. In typical residential construction, all utilities, including water and electric power, are routed within the walls and under the subfloor. As the toilet flushes, the water closet fill valve rapidly opens. This creates a momentary drop in the supply line water pressure, causing the pipe to flex slightly. When the fill valve closes, the moving mass of water is suddenly forced to a halt, producing another flex in the pipe. The mechanical stress in the pipe is translated to the house structure, which in turn is flexing some electrical circuit. Over many years of repeated flushing, the buildup of repetitive strain has caused small faults to occur in the flexed power circuit. This causes momentary drop-outs in that circuit, which cause the computer to re-boot. Even if the circuit is a different one than the computer's power source, the electrical noise caused by the fault couples onto whole house wiring. The fault could even be located at the water heater, where a strap jumper is often used to electrically connect the inlet and outlet pipes to maintain ground continuity of the plumbing system. Fixing this is difficult, since it puts the customer's desires for computational efficiency in direct opposition to his personal hygiene training. Sure, the easy path would be to tell the customer that the toilet is simply not Windoze compatible, and that he must upgrade to Potty NT. But I think that there's an elegant way to fix this in software. The customer has obviously been making those nature calls during the operation of some particular program, let's say MS Word. The customer should simply put a shortcut, pointing to the path for winword.exe, into his Start Up folder. That way, when the computer re-boots, it will automatically re-start MS Word and re-load the work-in-process from the back-up copy. (To avoid significant work loss, the Auto Save option should be set to a short interval, like maybe 30 seconds.) Regards, Ed From: Bailin Ma b...@namg.us.anritsu.com Subject: EMC Detective and Flushing Toilet Date: Wed, 31 Dec 1969 23:00:00 GMT To: emc-p...@ieee.org Greeting to the group, EMC engineers in a PC maker received a customer's complains transferred from technical support group that every time he flushes toilet his PC always reboots. Assuming you were one of EMC engineers, please participate the discussion and try to answer following questions: (1) Fabricate an EMC story to relate the cause (Flushing toilet) to the effect (Rebooting PC). (2) Direct the customer to verify your speculation. (3) Fix the problem. Barry Ma -- Ed Price ed.pr...@cubic.com Electromagnetic Compatibility Lab Cubic Defense Systems San Diego, CA. USA 619-505-2780 List-Post: emc-pstc@listserv.ieee.org Date: 07/09/1999 Time: 10:28:06 Military Avionics EMC Services Our Specialty Also Environmental / Metrology / Reliability -- - 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: Video protocols..
Hi George: Pal is primarily used throughout Europe and NTSC is used in USA, Canada, Mexico and Japan. Does anyone know of any other countries that may use NTSC ? Check out the following web sites: http://www.bbc.co.uk/aberdeen/eng_info/world_tv_standards.shtml http://www.ee.surrey.ac.uk/Contrib/WorldTV/ http://kropla.com/tv.htm Best regards, Rich - 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 Detective and Flushing Toilet
Barry - I know of only two reasons and one wild speculation on why flushing a toilet would cause the computer to reboot - 1. See if they have installed an automatic flusher on their toilet and if it is on the same circuit as the PC. If this is the case then a line conditioner between the PC and the outlet should solve the problem. 2. If the customer lives in a rural area, they may have a boost pump to maintain the water pressure in the house. My parents have one at their place and every time it starts they have a mini brownout (they have a 100A service box!). If the PC and the boost pump share the same circuit well we can guess what will happen. A UPS is the best solution. The smallest one on the market should do the trick. 3. The wild Speculation - The house has grounding wire connected to the pipes directly and the pipes don't provide a proper ground (plastic or dry dirt). When the toilet is flushed the water makes an electrical connection through the metal pipes in the house and the cast iron drain pipe running under the house. This would generate a spike on the grounding pin of the PC and causing it to reboot. Solution - have a licensed electrical contractor upgrade the electrical system with the proper grounding technique for the geographical area. Mike -Original Message- From: b...@namg.us.anritsu.com [mailto:b...@namg.us.anritsu.com] Sent: Wednesday, December 31, 1969 3:00 PM To: emc-p...@ieee.org Subject: EMC Detective and Flushing Toilet Greeting to the group, EMC engineers in a PC maker received a customer's complains transferred from technical support group that every time he flushes toilet his PC always reboots. Assuming you were one of EMC engineers, please participate the discussion and try to answer following questions: (1) Fabricate an EMC story to relate the cause (Flushing toilet) to the effect (Rebooting PC). (2) Direct the customer to verify your speculation. (3) Fix the problem. Barry Ma - 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: Product traceability for recall
Try http://www.cpsc.gov/ http://www.cpsc.gov/ for US legal requirements concerning recall -- From: Ling, Philip [SMTP:pl...@newport.com] Sent: Friday, July 09, 1999 12:03 PM To: emc-p...@majordomo.ieee.org Subject: Product traceability for recall Couple of week age I did see someone mention regarding the Product Traceability for recall. I need some help if anybody have the information please let me know. My question is : What standards or report do we maintain regarding product traceability as required by law or applicable government authority? Do US laws cover exports as well ? Thanks. Philip Ling - 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: connectors that meet hipot requirements
In a message dated 7/7/99, Susan Beard writes: Anyone know of any connectors with 0.1 spacings that survive a 2000 volt rms hipot requirement? Susan: Don't forget that for most connectors, the minimum spacing actually occurs on the printed circuit board, at the land areas around the pins. For a through-hole connector that has .100 pin spacings and .060 round pads, the spacing on the board will be .040. Several times I have seen people fail to take this into account. For through-hole pins, you can increase the separation by using an oval pad. Surface mount connectors often allow greater spacing for the same pin pitch. Another way to provide the required separation is to use a connector that has a smaller pitch, but allocate one or more dead pins (not connected to anything) between the pins you are trying to separate. In this case, the effective separation will be the total of all the smaller separations between pins. Sometimes this approach allows you to use a connector that is otherwise more desirable than one selected specifically for its pin separation. In practice, a .040 spacing might pass your 2000 VRMS test, but I would recommend a minimum of .050. Anything above this amount would increase your margin of safety. Joe Randolph Telecom Design Consultant Randolph Telecom, Inc. 781-721-2848 (voice) 781-721-0582 (fax) - 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).
Fw: Needle Flame Test
Posted for Gorodetsky, Vitaly vgorodet...@canoga.com: While performing the Bellcore Needle Flame Test, a break of electrolytic capasitors' hermeticity may occur with potential release of hazardous substances . Does anyone have an experience in preventing this or any idea how to handle this to pass the test? Could you write up on this subject or give me a pointer to any application notes addressing this issue. If my memory serves me well, a similar question was posted about a month ago or so and briefly discussed. Thanks in advance for your advice. Vitaly Gorodetsky Compliance Engineer Direct: (818) 678-3840 Canoga Perkins Corp. Main: (818) 718-6300 20600 Prairie Street FAX:(818) 678-3740 Chatsworth, CA 91311-6008 e-mail: vgorodet...@canoga.com ---End of Original Message- -- Ed Price ed.pr...@cubic.com Electromagnetic Compatibility Lab Cubic Defense Systems San Diego, CA. USA 619-505-2780 List-Post: emc-pstc@listserv.ieee.org Date: 07/09/1999 Time: 09:37:20 Military Avionics EMC Services Our Specialty Also Environmental / Metrology / Reliability -- - 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: Video protocols..
George, For a list of which countries use what format, check out the following site: http://kropla.com/tv.htm Ali -Original Message- From: sparaci...@andovercontrols.com [mailto:sparaci...@andovercontrols.com] Sent: Friday, July 09, 1999 8:38 AM To: emc-p...@ieee.org Subject: Video protocols.. Good Morning, I am dealing with two video formats for video cameras and monitors, Pal NTSC. Pal is primarily used throughout Europe and NTSC is used in USA, Canada, Mexico and Japan. Does anyone know of any other countries that may use NTSC ? Thanks, George - 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: CISPR 22 equal to EN55022?
I'm hardly the EMC attorney, but I believe the way it works is the technical body generates CISPR 22, and the lawyers adopt and publish it as EN55022 Mark -Original Message- From: Matejic, Mirko [mailto:mmate...@foxboro.com] Sent: Thursday, July 08, 1999 2:34 PM To: 'Richard Cass'; 'emc-p...@majordomo.ieee.org' Subject: RE: CISPR 22 equal to EN55022? Rich, I'm not aware of differences. Potential for difference exists during transitions, it takes some time for EN 55022 to follow Amendments to CISPR 22 or new editions. Mirko Matejic -Original Message- From: Richard Cass [SMTP:richard_c...@irisinc.scitex.com] Sent: Thursday, July 08, 1999 2:00 PM To: 'emc-p...@majordomo.ieee.org' Subject: RE: CISPR 22 equal to EN55022? Surprisingly, I never got an answer on this. Perhaps many of thought that it was so simple that someone was bound to answer. For the exorbitant cost of this service you would think that I would get better service than this. ;-) Rich C. -Original Message- From: Richard Cass [mailto:richard_c...@irisinc.scitex.com] Sent: Friday, June 18, 1999 3:55 PM To: 'emc-p...@majordomo.ieee.org' Subject: CISPR 22 equal to EN55022? Neophyte question of the week. If a supplier of a product claims compliance to CISPR 22, is this exactly equivalent to EN55022 (assuming you have met all the latest amendments) for the purposes of CE marking? - 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). - 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: EMC Detective and Flushing Toilet
Barry, Wild stab in the dark here. The PC is grounded to the plumbing. The Plumbing is a mixture of grounded and ungrounded parts. When the water flowing in the plumbing from the toilet flush connects two dissimilar grounded parts of the plumbing, one is noisy and causes the PC to reboot. To verify, cut off the third wire ground on the PC power cord. If proven, then ground all parts of the plumbing to the same ground point, using ground cable (# 6 AWG or larger copper only. Be careful in cutting off third wire grounds, etc. etc. Second potential is when the toilet flushes, it causes the well pump to run (for those of us with homes fed by our own water wells). Every time the well pump kicks on, the PC reboots due to power spikes. Correct the wiring for whichever branch circuit is the problem, loose connections, undersized wires, overloaded circuits. Try running isolated ground branch circuit from mains panel to PC, assuming ground at mains panel is OK. There may be other possible problems but would want more information before tossing out too much bizarre stuff. Scott s_doug...@ecrm.com -Original Message- From: b...@namg.us.anritsu.com [SMTP:b...@namg.us.anritsu.com] Sent: Friday, July 09, 1999 3:03 PM To: emc-p...@ieee.org Subject:EMC Detective and Flushing Toilet Greeting to the group, EMC engineers in a PC maker received a customer's complains transferred from technical support group that every time he flushes toilet his PC always reboots. Assuming you were one of EMC engineers, please participate the discussion and try to answer following questions: (1) Fabricate an EMC story to relate the cause (Flushing toilet) to the effect (Rebooting PC). (2) Direct the customer to verify your speculation. (3) Fix the problem. Barry Ma - 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: EMC Detective and Flushing Toilet
Let's see here. My mommy sent me to college so that I could play with tinfoil, and theorize about toilets! Heavy sigh!. I think we have missed the obvious point here. This whole things boils down to a computer dump! If you quit feeding it the need for the dump should go away. Sorry about the potty mouth. I do have a final question though, why is the client working on the computer while he's in the bathroom anyway? If they are this involved with his computer maybe the problem is just stuff falling out of their pocket protector and hitting the reset button. Gary -Original Message- From: ed.pr...@cubic.com [SMTP:ed.pr...@cubic.com] Sent: Friday, July 09, 1999 11:28 AM To: Bailin Ma; EMC-PSTC Subject:Re: EMC Detective and Flushing Toilet Barry: I would be tempted to say that the reboot is actually an undocumented feature in which bad data is automatically flushed from the system. But this actually sounds like a clear case of hydraulic hammer. In typical residential construction, all utilities, including water and electric power, are routed within the walls and under the subfloor. As the toilet flushes, the water closet fill valve rapidly opens. This creates a momentary drop in the supply line water pressure, causing the pipe to flex slightly. When the fill valve closes, the moving mass of water is suddenly forced to a halt, producing another flex in the pipe. The mechanical stress in the pipe is translated to the house structure, which in turn is flexing some electrical circuit. Over many years of repeated flushing, the buildup of repetitive strain has caused small faults to occur in the flexed power circuit. This causes momentary drop-outs in that circuit, which cause the computer to re-boot. Even if the circuit is a different one than the computer's power source, the electrical noise caused by the fault couples onto whole house wiring. The fault could even be located at the water heater, where a strap jumper is often used to electrically connect the inlet and outlet pipes to maintain ground continuity of the plumbing system. Fixing this is difficult, since it puts the customer's desires for computational efficiency in direct opposition to his personal hygiene training. Sure, the easy path would be to tell the customer that the toilet is simply not Windoze compatible, and that he must upgrade to Potty NT. But I think that there's an elegant way to fix this in software. The customer has obviously been making those nature calls during the operation of some particular program, let's say MS Word. The customer should simply put a shortcut, pointing to the path for winword.exe, into his Start Up folder. That way, when the computer re-boots, it will automatically re-start MS Word and re-load the work-in-process from the back-up copy. (To avoid significant work loss, the Auto Save option should be set to a short interval, like maybe 30 seconds.) Regards, Ed From: Bailin Ma b...@namg.us.anritsu.com Subject: EMC Detective and Flushing Toilet Date: Wed, 31 Dec 1969 23:00:00 GMT To: emc-p...@ieee.org Greeting to the group, EMC engineers in a PC maker received a customer's complains transferred from technical support group that every time he flushes toilet his PC always reboots. Assuming you were one of EMC engineers, please participate the discussion and try to answer following questions: (1) Fabricate an EMC story to relate the cause (Flushing toilet) to the effect (Rebooting PC). (2) Direct the customer to verify your speculation. (3) Fix the problem. Barry Ma -- Ed Price ed.pr...@cubic.com Electromagnetic Compatibility Lab Cubic Defense Systems San Diego, CA. USA 619-505-2780 Date: 07/09/1999 Time: 10:28:06 Military Avionics EMC Services Our Specialty Also Environmental / Metrology / Reliability -- - 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
FW: EMC Detective and Flushing Toilet
I post this interesting response offered by my supervisor. Jim Knighten Dr. Jim Knightene-mail: jim.knigh...@sandiegoca.ncr.com mailto:jim.knigh...@sandiego.ncr.com Senior Consulting Engineer NCR 17095 Via del Campo San Diego, CA 92127 http://www.ncr.com http://www.ncr.com Tel: 858-485-2537 Fax: 858-485-3788 * Notice my previous alert about a new external e-mail address was premature! * * Notice the Area Code change from 619 * -Original Message- From: Woolf, Bill Sent: Friday, July 09, 1999 1:56 PM To: Knighten, Jim L; Rostek, Paul M; Canizal, Julio C; Fan, Jun Cc: Smith, Norm W Subject:RE: EMC Detective and Flushing Toilet Jim, I suspect the problem is related to the unequal resistance in the plumbing of the house, creating resistive gaps and possible ground faults in the electrical wiring of the house. Many homes falsely rely on the plumbing lines to provide a good ground for the electrical systems. These things can happen, you know, with old houses and cheap home repairs. The ground faults appear to be causing emission problems which I'm sure you have seen before. After an exhaustive search of the WEB I came up with the follow article which I believe will fully explain the root cause: http://web.raex.com/~colombo/pipe.htm http://web.raex.com/~colombo/pipe.htm Bill -Original Message- From: Knighten, Jim L Sent: Friday, July 09, 1999 1:23 PM To: Rostek, Paul M; Canizal, Julio C; Fan, Jun Cc: Smith, Norm W; Woolf, Bill Subject:FW: EMC Detective and Flushing Toilet Dr. Jim Knightene-mail: jim.knigh...@sandiegoca.ncr.com mailto:jim.knigh...@sandiegoca.ncr.com Senior Consulting Engineer NCR 17095 Via del Campo San Diego, CA 92127 http://www.ncr.com http://www.ncr.com Tel: 858-485-2537 Fax: 858-485-3788 * Notice my previous alert about a new external e-mail address was premature! * * Notice the Area Code change from 619 * -Original Message- From: ed.pr...@cubic.com mailto:ed.pr...@cubic.com [SMTP:ed.pr...@cubic.com] mailto:[SMTP:ed.pr...@cubic.com] mailto:[SMTP:ed.pr...@cubic.com] mailto:[SMTP:ed.pr...@cubic.com] Sent: Friday, July 09, 1999 11:28 AM To: Bailin Ma; EMC-PSTC Subject:Re: EMC Detective and Flushing Toilet Barry: I would be tempted to say that the reboot is actually an undocumented feature in which bad data is automatically flushed from the system. But this actually sounds like a clear case of hydraulic hammer. In typical residential construction, all utilities, including water and electric power, are routed within the walls and under the subfloor. As the toilet flushes, the water closet fill valve rapidly opens. This creates a momentary drop in the supply line water pressure, causing the pipe to flex slightly. When the fill valve closes, the moving mass of water is suddenly forced to a halt, producing another flex in the pipe. The mechanical stress in the pipe is translated to the house structure, which in turn is flexing some electrical circuit. Over many years of repeated flushing, the buildup of repetitive strain has caused small faults to occur in the flexed power circuit. This causes momentary drop-outs in that circuit, which cause the computer to re-boot. Even if the circuit is a different one than the computer's power source, the electrical noise caused by the fault couples onto whole house wiring. The fault could even be located at the water heater, where a strap jumper is often used to electrically connect the inlet and outlet pipes to maintain ground continuity of the plumbing system. Fixing this is difficult, since it puts the customer's desires for computational efficiency in direct opposition to his personal hygiene training. Sure, the easy path would be to tell the customer that the toilet is simply not Windoze compatible, and that he must upgrade to Potty NT. But I think that there's an elegant way to fix this in software. The customer has obviously been making those nature calls during the operation of some particular program, let's say MS Word. The customer should simply put a shortcut, pointing to the path for winword.exe, into his Start Up folder. That way, when the computer re-boots, it will automatically re-start MS Word and re-load the work-in-process from the back-up copy. (To avoid significant work loss, the Auto Save option should be set to a short interval, like maybe 30 seconds.) Regards, Ed From: Bailin Ma b...@namg.us.anritsu.com
RE: High pass filter
You didn't specify if this is for XMIT/RCV. Nor to what frequency the pass band must be flat. If receive, try minicircuits. They will be least expensive. If you need something to many GHz, you will have to go with an outfit like KL, Trilithic, or others similar. -Original Message- From: ed.pr...@cubic.com [SMTP:ed.pr...@cubic.com] Sent: Tuesday, July 06, 1999 4:42 PM To: EMC-PSTC Subject: Fw: High pass filter Posted for jchanbacl jchanb...@email.msn.com: From: jchanbacl jchanb...@email.msn.com Subject: High pass filter Date: Tue, 6 Jul 1999 13:09:50 -0700 To: ed.pr...@cubic.com Hi, Everyone; I am looking for high pass filter. The cutoff frequency is 900 MHz. Can anyone tell me where I can buy one? Thank you. Best Regards; John Chan ---End of Original Message- -- Ed Price ed.pr...@cubic.com Electromagnetic Compatibility Lab Cubic Defense Systems San Diego, CA. USA 619-505-2780 Date: 07/06/1999 Time: 13:42:19 Military Avionics EMC Services Our Specialty Also Environmental / Metrology / Reliability -- - 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).
Product traceability for recall
Couple of week age I did see someone mention regarding the Product Traceability for recall. I need some help if anybody have the information please let me know. My question is : What standards or report do we maintain regarding product traceability as required by law or applicable government authority? Do US laws cover exports as well ? Thanks. Philip Ling - 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).
EMC Detective and Flushing Toilet
Greeting to the group, EMC engineers in a PC maker received a customer's complains transferred from technical support group that every time he flushes toilet his PC always reboots. Assuming you were one of EMC engineers, please participate the discussion and try to answer following questions: (1) Fabricate an EMC story to relate the cause (Flushing toilet) to the effect (Rebooting PC). (2) Direct the customer to verify your speculation. (3) Fix the problem. Barry Ma - 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).
RTTE Directive
A contact was made with DG III concerning the RTTE Directive. The questions and the reply are listed below. In reference to his last remark, why is there now controversy over the definition of placing on the market after the term was clearly defined by the Commission in two explanatory documents on the EMC Directive? 1) Is there a transition period during which products which meet existing regulatory requirements can continue to be sold? They can continue to be placed on the market (but not be type approved anymore according such rules after 8/4/2000). 2) Is it necessary to upgrade products which are already placed on the market before April 2000 but will not be put into use by end users until after that date? No. There is a small legal interpretation issue to be resolved in this context: what is the meaning of placing on the market? Some people argue it relates to product types, others to individual products. we are currently studying this issue. It has consequences for the practical implications of the above. If it relates to products, then all products sold after 8/4/2001 should be compliant with the RTTE Directive, even those type approved before 8/4/2000.
Color TV Standards
There are a number of countries that use NTSC other than the ones you mentioned, the most important of which is probably South Korea. In any case, a complete list is available at http://kropla.com/tv.htm This list has the country and whether it uses NTSC, PAL or SECAM. Cal Whiteley Patton Electronics - 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: Re:EMC Experiments
Bonjour de Montreal, The IEEE EMC Society has an education manual that is available free at : http://www.emcs.org/emcsedu.html just click on The IEEE EMC Education Manual is available here in PDF format (3.62 MB). Good luck, -- Benoit Nadeau, ing. M.ing. (P.Eng., M.Eng) Gerant du Groupe Conformite (Conformity Group Manager) Matrox http://www.matrox.com/ -- 1055, boul. St-Regis Dorval (Quebec) Canada H9P 2T4 Tel : (514) 822-6000 (x2475) FAX : (514) 822-6275 Internet : bnad...@matrox.com, mailto:bnad...@matrox.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).
