Approved 10 Base-T magenetics

Greeetings all, Does anyone know of isolation transformers for LAN or Telecom tht have agency approvals for safety isolation? I am intersted in single dual or quad pacakges that are http://12.9.181.228 ProductFinder/index.cfm?fuseaction=Home.MainCategoryID=1429 10 Base-T performance or better.

Re: Q. on Res Bandwith performace traceabiity

I believe Mr. Cuthbert is correct, but that doesn't change the fact that CISPR 16 specifies 6 dB bandwidths. From: drcuthb...@micron.com Date: Thu, 28 Aug 2003 15:47:55 -0600 To: ken.ja...@emccompliance.com, cgrassospri...@earthlink.net, emc-p...@ieee.org Subject: RE: Q. on Res Bandwith

RE: Hi-Pot testing

Chris, do they really need the gas tubes and MOV's or are these components someone's insurance or empirical engineering? Dave Cuthbert Micron Technology From: Chris Maxwell [mailto:chris.maxw...@nettest.com] Sent: Thursday, August 28, 2003 1:38 PM To: Rich Nute Cc:

Noise ap note

Here's a good National Semiconductor ap note on electrical noise that I ran into again after several years. I'm presently in the process of performing some 1/f and thermal noise measurements. http://www.national.com/search/search.cgi/apnotes?keywords=noise Click on ap note 104

standards about surge protection devices

Hello List, I friend of mine is manufacturing a device for surge protection (for residential, commercial and industrial environments) and he is interested in selling this equipment in the European Market. I'd like to know which european standards (EN's, IEC) are related to this kind of device.

Re: Product standard for telescope

I read in !emc-pstc that Brewster, Alan alan.brews...@novellus.com wrote (in CF6DCEDA22787446978A697FEB9B20DC045FB304@msxsanjose2.novellus .com) about 'Product standard for telescope' on Thu, 28 Aug 2003: the EN55014's for household apparatus, for example. I don't see that a telescope would

antennas

Does anyone know what standards would cover Amateur Radio Antennas in Europe? 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

RE: Hi-Pot testing

Thanks for the response. It's hard to say. I wasn't there for the hipot test. I just saw the aftermath. A little background: The unit under test had a power supply which we designed from off the shelf building blocks. The first building block is a rectifier/doubler, which takes the AC

Re: Q. on Res Bandwith performace traceabiity

My understanding is that it is the 6 dB points which are cited as the bandwidth. I'm not up on CISPR 16 but to entirely specify the bandwidth the 60 dB down points are also specified. The slope you get from the 6 dB to the 60 dB points is called the shape factor. From: Charles Grasso

RE: Hi-Pot testing

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

Re: Hi-Pot testing

Hi Chris: 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

RE: Product standard for telescope

The answer to this lies in the marketing information for the product. The target End-Use-Environment drives the choice of standards. If this equipment is being sold to residential users exclusively then it would not be scientific equipment. This would rule out EN 61326 and the choice would then be

RE: Hi-Pot testing

Chris, I wasn't real clear on what was breaking during your hipot test. However, these comments might help: 1) Be sure you are hipot testing with a DC test voltage. AC testing can damage your Y capacitors. DC test voltage = peak of AC test voltage = 1.414 x AC test voltage. 2) If your product

Energy-usinig Products

For those interested, the latest proposal (dated 1 August) by the EC commission for EuP can be found at http://europa.eu.int/eur-lex/pri/en/lip/latest/doc/2003/com2003_0453en01 .doc (copy this as a single line). Regards, Neil Helsby

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

unsubscribe

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RE: Multiple postings re fuse replacement markings

From: richhug...@aol.com [mailto:richhug...@aol.com] Sent: Thursday, August 28, 2003 2:29 AM To: j...@jmwa.demon.co.uk; emc-p...@majordomo.ieee.org Subject: Re: Multiple postings re fuse replacement markings Folks, Apologies for bombarding you with the same Email. This was because AOL sent me

Q. on Res Bandwith performace traceabiity

Greetings: Does anyone know if the Resolution Bandwidth filter performance is tracable to a given standard and which standard that might be? I was wondering if the rool-off after the 3dB points is specificed as a standard for ALL analysers. I am assuming that the anaswer is Yes as chaos would

Re: Multiple postings re fuse replacement markings

Folks, Apologies for bombarding you with the same Email. This was because AOL sent me a message that my message couldn't be sent and so I re-tried. If its any consolation, that means I got extra helpings of so-and-so is out of the office messages. Richard Hughes

Re: Product standard for telescope

I read in !emc-pstc that lfresea...@aol.com wrote (in d.17866aa0.2c7ec...@aol.com) about 'Product standard for telescope' on Wed, 27 Aug 2003: We are trying to decide which EMC product standard may apply for EMC. Would anyone care to share their opinions?   It's a scientific

Re: fuse replacement markings

I read in !emc-pstc that richhug...@aol.com wrote (in 130.2454e3f2.2c7e 9...@aol.com) about 'fuse replacement markings' on Wed, 27 Aug 2003: There are plenty of fuse standards other than IEC 60127 and unfortunately there is little or no commonality in marking requirements between

Re: fuse replacement markings

I read in !emc-pstc that richhug...@aol.com wrote (in 174.1f945a94.2c7e a...@aol.com) about 'fuse replacement markings' on Wed, 27 Aug 2003: There are plenty of fuse standards other than IEC 60127 and unfortunately there is little or no commonality in marking requirements between

Comb Filter

Hello All, Thanks to everyone who answered regarding my question about comb filters. Regards Shaike Raz EMC Laboratory Manager EMC Laboratory ITL (Product Testing) Ltd. Kfar Bin Nun Israel Tel: +972-8-9797799 Fax: +972-8-9797702 Email: s...@itl.co.il http://www.itl.co.il

Re: EMI receiver for OATS

In a message dated 8/27/2003 6:55:38 PM Central Daylight Time, gary_mcintu...@msn.com writes: Just a small heads up John. I don't have the specs on the instruments that you are discussing but one of the many things that the NIST folks want to know about your site are the qualifications of

Product standard for telescope

Hi All, I'm chatting with a client that manufacturers high end telescopes. Not usually found in Walmart, Currys etc. but they may find their way into richer family homes. These chaps are great for observing Mars at the moment! We are trying to decide which EMC product standard may apply for

Re: fuse replacement markings

John, Regarding your comment: Aren't you trying to conform to IEC 60950? If so, the code that I posted is what is required. I am surprised that clause 1.7.6 is so vague, when the corresponding clause in IEC 60065 is very explicit that the code specified in IEC 60127 shall be used There are