RE: help needed to inject/induce 100 V, 60 Hz common-mode noise

http://www.ieee-pses.org/symposium http://www.emc2004.org/ -- You don't mention anything about the data requirements, so this may be silly, but why not use a standard "Y" capacitor like you would use for power supply filtering with the base of the "Y

RE: FCC Part 18 - measurement at closer distance

http://www.ieee-pses.org/symposium http://www.emc2004.org/ Tom, I have had experience submitting data taken at a closer distance than specified, although in this case it was 120kHz RF-ID systems. At close distances the FCC allows 1/d^2, but the reality is closer to 1/d^3 at 3, 10 and

RE: FCC Part 18 - measurement at closer distance

http://www.ieee-pses.org/symposium http://www.emc2004.org/ On Thu, 8 Jul 2004 08:14:44 -0600, drcuthb...@micron.com wrote: > I ran the sim again using perfect GND. The field falls off as 1/d. Over > lossy ground it falls off much faster than 1/d. The antennas are 1/4 > wavelength gro

RE: Hi-impedance Ohm meter

http://www.ieee-pses.org/symposium http://www.emc2004.org/ Thanks for all of you who have spent time to reply my following question , appreciated ! Catherine Xu From: owner-emc-p...@listserv.ieee.org [mailto:owner-emc-p...@listserv.ieee.org]On Behalf Of Xu, Catherine (EMC Engr-San Di

UL the only NRTL accepted by certain city/county in the US?

http://www.ieee-pses.org/symposium http://www.emc2004.org/ Hello, Is UL the only NRTL that’s being accepted by LA County, Cook County (in Ill.) and the City of Milpitas? At least in the past, I was told that the above is true. However, things might have been changed. Please advise.

help needed to inject/induce 100 V, 60 Hz common-mode noise

http://www.ieee-pses.org/symposium http://www.emc2004.org/ -- Hi, I need to inject/induce a 60Hz common mode signal with a p-p voltage of around 100V onto a RJ11 cable. I have signal generator, amplifier and some coupling devices but none of my stuf

RE: Hi-impedance Ohm meter

http://www.ieee-pses.org/symposium http://www.emc2004.org/ >-Original Message- >From: Xu, Catherine (EMC Engr-San Diego) [mailto:x...@hp.com] >Sent: Thursday, July 08, 2004 1:31 PM >To: emc-p...@ieee.org; emc-p...@majordomo.ieee.org >Subject: Hi-impedance Ohm meter > > >http://w

RE: Hi-impedance Ohm meter

http://www.ieee-pses.org/symposium http://www.emc2004.org/ You might try these - http://www.alliedelec.com/Catalog/Indices/IndexHandler2.asp?ID=Insulatio n%20Testers&seq=67&IND=MM The last time I dealt with a Megger, you cranked it by hand to generate the bias voltage. But, that was a

Hi-impedance Ohm meter

http://www.ieee-pses.org/symposium http://www.emc2004.org/ Hi, colleagues, Can someone please provide recommendation on the equipment to use for following purpose? We are looking for a high impedance Ohm-meter to characterize the conductivity / isolation for different materials under

Re: Resistors in ESD Test Setups

http://www.ieee-pses.org/symposium http://www.emc2004.org/ Hi All, A secondary use for the resistors is that they help break up the resonant circuit composed of the HCP on the table and the plane on the floor capacitor and the inductance of the connecting lead. The old ANSI standard on

RE: NPFA 72

http://www.ieee-pses.org/symposium http://www.emc2004.org/ Peter, and others Who kindly pointed out that I should be looking for NFPA 72 not NPFA 72. No wonder I couldn't find any info. Thanks. Chris From: owner-emc-p...@listserv.ieee.org [mailto:owner-emc-p...@listserv.ieee.org]O

RE: NPFA 72

http://www.ieee-pses.org/symposium http://www.emc2004.org/ Chris - You probably already know this, but the best place to start is: http://www.nfpa.org/ Regards, Peter L. Tarver, PE ptar...@ieee.org > -Original Message- > From: Colgan, Christopher > Sent: Thursday, July 08,

Re: FCC Part 18 - measurement at closer distance

http://www.ieee-pses.org/symposium http://www.emc2004.org/ Thank you. > From: drcuthb...@micron.com > Date: Thu, 8 Jul 2004 08:14:44 -0600 > To: , , > Subject: RE: FCC Part 18 - measurement at closer distance > > Ken, > > I ran the sim again using perfect GND. The field falls off as 1

Optical Passives for European Market

http://www.ieee-pses.org/symposium http://www.emc2004.org/ Richard: I apologize if you felt that your previous answer was not what I wanted to hear, this is most certainly not the case. Granted, I can see that EN 60 825-2 would apply here. However, I'm used to invoking EN 60 825-2 from

RE: FCC Part 18 - measurement at closer distance

http://www.ieee-pses.org/symposium http://www.emc2004.org/ Ken, I ran the sim again using perfect GND. The field falls off as 1/d. Over lossy ground it falls off much faster than 1/d. The antennas are 1/4 wavelength ground planes with the bases 1 meter above GND. Given more details I c

RE: Resistors in ESD Test Setups

http://www.ieee-pses.org/symposium http://www.emc2004.org/ -- An excellent summary --- just a note regarding the voltage across the 470k resistor: you can use series combinations to lower the potential across any one resistor body -- Mike Hopkins

RE: Resistors in ESD Test Setups

http://www.ieee-pses.org/symposium http://www.emc2004.org/ From: drcuthb...@micron.com [mailto:drcuthb...@micron.com] Sent: Thursday, July 08, 2004 6:40 AM To: chris.maxw...@nettest.com; emc-p...@ieee.org Subject: RE: Resistors in ESD Test Setups http://www.ieee-pses.org/symposium ht

Re: FCC Part 18 - measurement at closer distance

http://www.ieee-pses.org/symposium http://www.emc2004.org/ At 13.56 MHz, wavelength is 22 meters. Depending upon the size of the EUT, 30 meters might or might not be in the far field of the EUT. If the EUT were small with respect to wavelength I would certainly expect 30 meters to be

RE: FCC Part 18 - measurement at closer distance

http://www.ieee-pses.org/symposium http://www.emc2004.org/ Tom, I am assuming your device operates at 13.56 MHz. I ran a NEC-2 simulation over "average" GND and the reduction in field strength is: DX 1/d NEC 30 m0 dB0 dB 30020 30 1600 35 58 So, acco

RE: Resistors in ESD Test Setups

http://www.ieee-pses.org/symposium http://www.emc2004.org/ -- Although 1/4-watt resistors have sufficient length to not flash over at 7.5 kV, they can still fail. A carbon film or metal film 470 k ohm resistor often has a spiral resistive structure.

Re: Resistors in ESD Test Setups

http://www.ieee-pses.org/symposium http://www.emc2004.org/ So the moral of the story is "A dump question from a beginner can some time pull the experts to long discussions". Thank you all for contributing your valuable suggestions that gave an in depth idea to the technicalities involve

Resistors in ESD Test Setups

http://www.ieee-pses.org/symposium http://www.emc2004.org/ -- All, The horse is dead, beaten, turned into glue (probably a few McDonald’s hamburgers) and buried :-) David Sterner and I have bounced a few emails back and forth (offline) on th

NPFA 72

http://www.ieee-pses.org/symposium http://www.emc2004.org/ Hello Group I have been asked if our family of signal processor products is suitable for use in a system that complies with NPFA 72. I would guess that there is no simple answer as I presume that the system as a whole would co

Re: FCC Part 18 - measurement at closer distance

http://www.ieee-pses.org/symposium http://www.emc2004.org/ I don't have the 46 CFR section you listed, but looked at 47 CFR Part 18 >from 1984, so what follows may not be exactly what you were after, but it seems quite clear to me that the two "options" you cited are not mutually exclus