RE: PSpice model for 1/4 wavelength antenna
Hi Robert, SPICE is a time domain tool, you might have difficulty finding a suitable model as most antenna analysis is performed in the frequency domain. To find the radiation resitance and impedance of a monopole is easy using one of the NEC family of codes (Numerical Electromagnetics Code) MininNEC etc. but this would not be a sufficient model for a SPICE run. Length diameter, feedpoint etc can all be considered but I know of no efficent tool for doing this in the time domain. Colin.. From: robert Macy [mailto:m...@california.com] Sent: Wednesday, October 08, 2003 2:59 PM To: emc-p...@ieee.org Subject: PSpice model for 1/4 wavelength antenna Does someone out there have a PSpice model for a 1/4 wavelength antenna? 433.92MHz Something that I can change to reflect diameter of the rod, detuning, etc. Or, do you know someone who has such a model? Need it fast, please. - 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 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
Corrosion tests - NEBS or Milspec accleration factors?
Question came up. Is there any real time correlation for some of the NEBS endurance tests. Salt corrosion (outdoor units - GR-487) for example.? In other words does the 200 hour test relate to 20 years real exposure to salt fog and spray common in port cities. Same question for the Mix flow gases and/or the hygroscopic dust tests. The test can be looked at one of two ways - 1) There is a direct acceleration correlation for every hour in the chambers the equipment would experience similar corrosion in 2 weeks of exposure if installed in a seaport etc. 4 hours 8 weeks etc. 2) The tests may be overly harsh, but experience has shown that while not directly relatable if the equipment withstands the various tests then it will last at least as long as the contracted life of the equipment. Say 20 Years! GR-1089 and GR-63 don't seem to provide this information. Is there somewhere else I should be looking? Thanks Gary
PSpice model for 1/4 wavelength antenna
Does someone out there have a PSpice model for a 1/4 wavelength antenna? 433.92MHz Something that I can change to reflect diameter of the rod, detuning, etc. Or, do you know someone who has such a model? Need it fast, please. - 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 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: Missing Emissions data from D of C?
In a message dated 10/3/2003 12:34:57 PM Central Daylight Time, bstu...@dlsemc.com writes: This points out one of the weaknesses of the self-declaration (DOC). The responsible party can self declare for whatever standards they feel suite their needs. Hi Bill, Not really, I have to disagree. I strongly believe in the DoC approach, otherwise we would be forced to use expensive labs. What's needed is a combination of education and enforcement Education, which should be free, ie state sponsered. Enforcement, which would be self funding. Cheers, Derek N. Walton Owner, L F Research EMI Design and Test Facility Poplar Grove, IL 61065
Quality Assurance Manager
Hi Sir; Please pass the advertisement to the group. Thank you. Bay Area Compliance Laboratory Corp. (BACL) is looking for a quality manager in Sunnyvale, CA. This person is going to responsible to the quality for the company, interface with ANSI, FCC, NIST, and OSHA. The minimum requirements will be at least ten years experience in the quality control, fully understand ISO 9000, ISO 17025, and ISO guide 65. Major lab expereince is a plus. Please send resume to jo...@baclcorp.com. John Chan Certification Manager Bay Area Compliance Laboratory Corp. 230 Commercial Street Sunnyvale, CA 94085 Tel: (408) 732 9162 Fax: (408) 732 9164 E-Mail: jo...@baclcorp.com
[no subject]
Can someone tell me if the emc pstc server is down. I have not seen any discussion from members for at least 2-3 days? Thanks, Gail Birdsall Hach Co.
RE: Missing Emissions data from D of C?
Hi Wrt to Bill's comment on the weakness of the DoC, I would personally say that the DoC in question is non-compliant with the EMCD since it does not declare compliance with a relevant full set of harmonised standards for bothimmunity and emissions or reference a relevant Competent Body-approved TCF, and therefore it does not demonstrate compliance with the requirements of Articles 3 4 (and related requirements) of the Directive. Therefore, the weakness is probably not with the concept of the DoC as stated in the Directive, but with the manner in which compliance with the Directive in general and the DoC requirements in particular is, or is not, enforced, (i.e. very rarely in many EU countries!). Nevertheless it would be interesting to be given the actual wording of that DoC so that we could comment in detail, since - in my experience - around 50% of DoC's are incorrect in some form, especially when prepared by someone who does not know both the relevant Directive(s) and the related interpretive documents. (In fact I wonder if it even referenced the EMCD, as I have seen some that called up only relevant standards and not the relevant overarching Directives). Regards John Allen, Technical Consultant EMC and Safety Engineering ERA Technology Ltd. Cleeve Road Leatherhead Surrey KT22 7SA UK Tel: +44-1372-367025 (Direct) +44-1372-367000 (Switchboard) Fax: +44-1372-367102 From: Bill Stumpf [mailto:bstu...@dlsemc.com] Sent: 03 October 2003 17:04 To: 'lfresea...@aol.com'; emc-p...@ieee.org Subject: RE: Missing Emissions data from D of C? Derek, This points out one of the weaknesses of the self-declaration (DOC). The responsible party can self declare for whatever standards they feel suite their needs. For instance, just because a product is CE marked, it doesn't mean that it has been tested or passed to all the relevant standards. It may just be safety. The only way to tell for sure is to look at the actual DOC, which lists the standards the product has been tested to. In the case you brought up, The product should have been tested for emissions to EN 55014 at the very least. We would also recommend EN 55022, since the potential for interference goes well beyond the 300MHz called out in EN 55014. William M Stumpf DLS Electronics 166 South Carter St. Genoa City WI 53128 ph: 262-279-0210 fx: 262-279-3630 email: bstu...@dlsemc.com Original Message- From: lfresea...@aol.com [mailto:lfresea...@aol.com] Sent: Thursday, October 02, 2003 1:02 PM To: emc-p...@ieee.org Subject: Missing Emissions data from D of C? Hi all, while reviewing a clients competitors D of C, I was surprised to see that only Immunity and Low voltage were address, there were no emissions requirements called out. The product is a professional arcade game. Is this product exempt? Any thoughts why this could be allowed? Cheers, Derek N. Walton Owner, L F Research EMI Design and Test Facility Poplar Grove, IL 61065 _ This e-mail has been scanned for viruses by MCI's Internet Managed Scanning Services - powered by MessageLabs. For further information visit http://www.mci.com * Copyright ERA Technology Ltd. 2003. (www.era.co.uk). All rights reserved. The information supplied in this Commercial Communication should be treated in confidence. No liability whatsoever is accepted for any loss or damage suffered as a result of accessing this message or any attachments. _ This e-mail has been scanned for viruses by MCI's Internet Managed Scanning Services - powered by MessageLabs. For further information visit http://www.mci.com
