Re: 2 GHz Amplifiers

Can anyone remind me what Standards require the 1.4 to 2.0 GHz Radiated Immunity Test? Thanks, Derek Walton. --- This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. Visit our web site at:

Re: EMSCAN (was TV nostalgia/EMI sniffer goggle)

Alas, you forget that there is a world outside of PC's and Coms;- Derek. --- 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: EMSCAN (was TV nostalgia/EMI sniffer goggle)

Hi all, I have an EMScan system that I used for debugging boards. I have mixed feelings, but for somethings it really helps. If anyone would like their board scanned to see if it would help them, let me know off line: I'm really cheap;- As for high frequency, the resolution of the grid

Re: LCD Monitors etc.

George, I did a number of experiments on 15 monitors for a machine HMI. They are indeed quiet, but there is quite a difference between manufacturers. Most of the problems I had to fix were related to leakage through the display from circuitry behind it. Derek.

Re: Surge tester for 3-phase product.

Indeed, Schaffner has just installed a 45 kVA 3-phase system in the USA. Derek Walton --- This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. Visit our web site at:

EMC Wall Charts

Hi all, I think this is OK, tell me if not! Schaffner has put out a series of colour wall charts. There are 4 covering emissions, immunity and automotive test requirements. There are Adobe Acrobat versions, or there are 0.7m by 1m paper versions. The Adobe Acrobat version can be downloaded

Re: EN 61000-3-2 and -3 equipment

Hi all, since the question has been asked, I feel oblighed to offer that Schaffner is stepping up to the plate for the Harmonics and flicker requirement, we've just completed installation of a 50 kVA system... but we have smaller;- Not wanting to upset list members with advertising,

Re: CISPR Compliant Spectrum analyzer/receiver

You could always use the worlds best kept secret, a Schaffner EMI receiver... There are 2, both fully CISPR compliant. Derek Walton. --- This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. Visit our

Re: Calibration of test equipment

Brian, my concern with your statement would be suggesting use of a NAMAS accredited lab Why not A2LA or other body. I know of a number of great cal labs with no accreditation Derek Walton --- This message is from the IEEE EMC Society Product

Re: Impedance Shielding Eff.

Hi Captain, You will be able to when we finally document what we're up to. There is a potential patent in the way we do the testing. The bad side is not that we can't disclose it yet, but that we're not in a position to generate revenue from it...;- Maybe by the time we meet in CA this

Re: Impedance Shielding Eff.

Ken, a jig like you describe was made and marketed by Elgal in the USA. It was called a SET 19 I believe. Derek. --- This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. To cancel your subscription,

Re: Impedance Shielding Eff.

Antonio, When I was a little younger, we tested a bunch of panels to help determine the make up of an aircraft structure. Our panels were about 10 by 18. We did the testing by putting the panel in the shared wall between two shield rooms, creating a field in one, then measuring the field in

Re: EN61000-3-2 -3

John, you may want to take a look at Schaffners offering, I really like their software and they are addressing A14. Call Greg Senko 603-642-4694 I believe HP are getting out of this market, so you may find some of their equipment going quite cheap. You may also find some other folks

Re: Site Correlation

In a message dated 1/16/01 7:09:38 AM Pacific Standard Time, ral...@igs.net writes: What it boils down to Chris is the lack of immunity of the consumer equipment contributes to degradation of the intended function. Ralph, I've made this point to Art Wall of the FCC many times, he does not

Product Standard for Prox Sensors

Hi, could anyone tell me in which of the following documents I can find the EMC requirements for Prox switches? EN 50227:1997 Control circuit devices and switching elements proximity sensors, d.c. interface for proximity sensors and switching amplifiers (NAMUR) EN 60947-5-2:1998

Testing T1 lines for CE

Hi all, has anyone been involved with testing T1 lines for conducted emissions in accordance with CISPR 22, and is prepared to share their experiences? Thanks, Derek Walton. --- This message is from the IEEE EMC Society Product Safety Technical

Lighning Generator

Hi all, I'm looking to perform Lightning testing to RTCA DO-160, and I'm not finding a lot of test equipment out there. In fact the best is from Solar with a 1 to 2 month lead time. I like the equipment, but is there any suggestions on other potential vendors, or on how to build my own?

Re: EN 61000-6-2 Table 2.3 inticates signal ports = 30 M +/- 1kv?

Hi all, let me bring a different perspective. In the aircraft world we have a lightning tests that stress interface wiring travelling some distance WRT local wiring. The reason we do this is because when lighting strikes the plane, the fuselarge(?) carries MANY amps, and there is a voltage

Testing short cables

Hi all, I have a product to test which comes with its own wiring harness. Several of the leads are not really long enough to make it through the FTB capacitive coupling clamp. Any thoughts on how to test these lines? 1) Extending them just for this test 2) Using what length there is 3) Not

RE: Complications of self-declaration without an independent test lab being involved

Gary, you make this statement... Besides I have never seen a cost impact on using an accredited lab, and knowing that my test lab reads this forum, I had better not see one (Morning, Paul and Jim), so it just doesn't seem prudent to me not to use an accredited lab I charge $600/day for

RE: Complications of self-declaration without an independent test lab being involved

Ghery, in your reply it reads as though an accredited lab is required. I want to make sure it is clear that for compliance with the EMC Directive it IS NOT the case. Use of an accredited lab may make life easier, but, I reiterate, it is not required. Best regards, Derek Walton

Re: High Frequency Pre-amp

Bob, the Schaffner preamp goes to 3 GHz I believe, Derek. --- 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

Re: surges on 24VAC

Jennifer, I have instructed those clients I deal with to test the input as follows: Get a transformer thats typical for your unit, and apply the surge to the input of it. Keep the leads short. By doing this you have made an attempt to met the standard. And, yes I know it's not perfect, but it

Re: 2 Phases in North America

Mike, I don't go with you on this one... 0 implies nothing ( prehaps 0 ac ) ... therefore the 0th harmonic is dc??? if a squarewave is made up of odd harmonics, we would have to rethink that, correct? Derek. --- This message is from the IEEE EMC

Re: mains leads with integral ferrites

Chris, I've made, in small quantities, mains leads with distributed ferrites. I did that to avoid the big clunky wart on the cable. Derek N. Walton Owner, L. F. Research EMC Design and Test Facility 12790 Route 76, Poplar Grove, IL 61065 www.lfresearch.com

Re: IEC 61000-4-2 ESD 61000-4-5 Surge lower levels

In a message dated 6/7/2002 5:01:43 PM Central Daylight Time, kro...@yahoo.com writes: If the EN 55024 calls for 1,2 kV for surge on the AC, does this mean we have to repeat the test @ .5, 1kV too? For ESD, 8 air, 4 cont should really be 8,6,4,2 air and 4,2,1 cont?? This is indeed the

Microwave Sweeper

Hi all, I have a microwave sweeper, 400 MHz to 18 GHz I believe, that I'd like to find another home for. Anyone interested before I put it on e-bay? Thanks, Derek N. Walton Owner, L. F. Research EMC Design and Test Facility 12790 Route 76, Poplar Grove, IL 61065 www.lfresearch.com

Fixture for CISPR 15

Hi, has anyone any idea where I can get the lamp fixtures illustrated in Fig 5a-f of EN55015. Thanks, Derek,

Re: Consulting

Jeff, I use folks in Europe, would you like their contact info? Derek. - 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

Re: Seeking PCs that Pass CISPR

In a message dated 3/5/99 3:10:49 PM Central Standard Time, b...@namg.us.anritsu.com writes: Chaz made a very good point. The reality unfortunately is that some PCs on the market don't meet the standards although they have FCC sticks or CE markings. Do we need some more law enforcement?

Re: Seeking PCs that Pass CISPR

In a message dated 3/5/99 11:01:58 AM Central Standard Time, gra...@louisville.stortek.com writes: I am confused. What's the problem? If we (the EMC Community) have faith in Plug Play (as the new FCC process is dubbed) then you should be able to buy ANY FCC logoed PC and pass. I can't

HIgh Field Testing

Hi there, I'm looking for locations that can help me HIRF test an LRU. This unit is mounted outside the fuselage on a rotary aircraft. Not a really nice place to be Thanks, Derek. - This message is coming from the emc-pstc discussion list. To cancel your subscription, send mail to

Re: New EMC requirements

In a message dated 3/3/99 7:55:28 AM Central Standard Time, george.da...@unisys.com writes: Derek: If you do not have confidence in the product you are buying then select another vendor. I understand your concern about products but I also understand your perspective as a test laboratory

Chicago EMC Event

Dear list members, The Chicago EMC Society are completing plans for a 1 day EMC minicon to be held in May 1999. The emphasis of the event is: 1) Emerging EMC technologies, an exhibits hall will be situated close by with many vendors offereing sample products. 2) Legal aspects of EMC. 2) What

Passive power factor correction

Hi folks, not long ago, there was some descussion on modules for passive power factor correction. We have an application of around 150 watts that is a borderline fail, and the addition of a small module would get us by until a new PS design is developed from scratch. Can anyone suggest

Re: Automotive EMC Directive

I know Elite in Chicago have been looking into Automotive testing, give Ray Klouda a call. Derek. --- This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. To cancel your subscription, send mail to:

Tri-Plate Line

Hi, I'm looking in to the make Vs. buy issues with the SAE Tri-Plate Line. Has anyone got experience that they would be prepared to share on which way to go? Thanks, Derek. --- This message is from the IEEE EMC Society Product Safety Technical

Fwd: October IEEE Meeting Announcement

---BeginMessage--- ** ***MEETING ANNOUNCEMENT*** IEEE EMC SOCIETY CHICAGO CHAPTER OCTOBER MEETING WHEN: Wednesday, October 25 7:00 Social, Refreshments

Re: Measurement Uncertainty

Jim, I suggest that you get a hold of Daren Valentine at A2LA, they do a great course on Uncertainty. I did attend the C63 course and was not impressed at all. Derek Walton --- This message is from the IEEE EMC Society Product Safety Technical

MOV's

Hi, does anyone have a SPICE model for an MOV? Thanks, Derek. --- This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. To cancel your subscription, send mail to: majord...@ieee.org with the single

RE: Conducted Emissions on Telecom Ports

Hi all, just thought I'd throw a few Euros in... First, until folks in the computer world know what shielded cable means ( anything less that 40 dB is lossy insulation;-))) ), I'd stear clear of specifying them. This is 20 years of experience talking, and shields seem to cause more problems

Used Equipment

Hi all, I'm trying to get a rough idea how much some used equipment I've been offered is worth. Anyone an opinion? 10 microfarad caps ( fair condition ) 50 microhenry LISN ( well used... ) Monopole antenna, untouched since 1991... EFS 1 and EFS 3 Field meters with leveling preamps. Thanks,

RE: Re(4): EN 61000-4-6 CDNs for a high speed bus.

David, the need to test fibre should not be dismissed lightly. We have been finding that some fibres are metalized to improve range(?), The metalization caries noise right into the photo detector. Unless you can be sure of what fibres you will encounter, test with several types. Derek

Re: Electrical safety of firearms

Ralph, I was the EMC Trials Engineer for Tornado ADV, and know the Tornado IDS field trial engineer well. I was unaware of this incident... Could you enlighten me more. Thanks, Derek Walton --- This message is from the IEEE EMC Society Product Safety

Re: Rack populating??-Rationalize it !!

Hi again Tania, I think from a CE point of view it's clear. If a customer is told he can do it ( or conversely you don't say it can't be done ), then you have to pass, period. An Englishman's 2 cents worth;-) Derek Walton --- This message is from the

Re: Rack populating??

In an experiment we performed using a 16 slot rack we determined that the noise floor level increased with the number of cards we added to the system. But we also observed that the spectral line associated with the primary clocks on eack card did not increas significantly as more cards were

Re: Request recommendations for an EMC lab at a reasonable distance from Nash...

Paul, I don't want to offend anyone on the list by publishing our rates, but I believe we can favorably compete with your local precompliance labs for the overall cost, even though we are just outside Chicago. Best regards, Derek Walton L F Research

Star Office

Hi all, looked like my flippant remark raised quite some interest... Star Office is an Office suite by SUN Microsystems, and can be downloaded from their site at: http://www.sun.com/products/staroffice/ I've been using Lotus Smart Suite until recently, but since they don't support Linux,

MIL STD 461

Hi, can anyone remind me where the MIL STD 461 can be download from? Thanks, Derek. --- This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. To cancel your subscription, send mail to:

EMI Room FIlter

Hi all, I'm looking for a filter to power the lights in my shield room... Something like: 10 to 20 amps @ 120 volts 60 Hz. Either dual channel or 2 filters, one for each phase. Anyone got spares? Thanks, Derek. --- This message is from the IEEE EMC

Re: EMC/EMI Training

Richard, at the risk of pushing my own barrow L F Research is preparing to host a 2 day course on EMC Engineering ( 1st week in Nov. ). This course will focus more on the lessons learnt during our last year of engineering and testing designs that came into our facility Very much a

Re: DC power distribution

Lisa, I recently discussed this concept with Norm Provost ( he was instrumental in the preparation of 1326 ), and I'm not sure that we agree but he is the Guru. We have taken the definition of network to mean devices sharing the same source of power. For example, on a large machine, a

Re: Component Qualification

Tony, we have an EMScan, and found it to be of limited use. If you have a board with components that protect peripheral interfaces, you really need to test with the interfaces present in the same fashion that you would run a Qual test. A precompliance facility does a better job than EMScan

Re: Near Field Versus Far Field/Troubleshooting

Chris, I've been doing a similar test for years, only I use a pin solderd to about 2 feet of wire. This way I don't actually touch the circuit myself. FYI, Derek. --- This message is from the IEEE EMC Society Product Safety Technical Committee

Re: EMC Engineers Pay

Ron, not long ago I asked the list for salary info, I've still not assembled what I wanted, but the following collates comments I received * seperates messages, hope this helps! EMC -- 5 years Compliance -- 10 years raises -- 4-5%, (good for our company) Its hard

Ferrite tile installation

Hi all, are there any companies out there that can help me install tiles in my shield room? I have the tiles... Thanks, Derek. --- This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. To cancel your

Lightning Generator

Hi all, anyone got a surplus lightning generator they want to get rid of? Thanks, Derek. --- This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. To cancel your subscription, send mail to:

Re: Spice Models for Surge Generators

All, speaking of surge generators, I'd like to make one to generate a short transient and a ring wave. The main parameters of the first wave are: Vpk - 600 volts Ipk - 300 amps Rise-time - under 1 microsecond 50% decay in about 6 microseconds General shape - double exponential The main

Looking for Ferrite Bead

Hi all, I'm looking for a ferrite bead that has a steady current rating of at least 6 amps. It should also be able to withstand 5 seconds intermittent increases to 15 amps. Performance during the 15 pulse is not really necessary but survival is, it's a fault condition Any impedance

EMC Test Conditions

Folks, the testing of a product at a MAJOR Compliance lab has me concerned. I have two main concerns, they are: 1) The test item is designed to be bolted to a large metallic structure which cannot be part of my set-up, it costs way to much ( $2,000,000 each ). So I have a fixture, which

Horn Antenna

Hi, I'd like to construct a wide band horn antenna covering from about 1 GHz to 10 GHz or so. This is used only to generate a field inside a small EMC Chamber ( about 1 metre by 0.7 metres ), so I'm not worried about gain flatness etc I just want field;-) Any thoughts about: 1)

RE: Technical Documentation

This is how we manage our technical files also. A CD-ROM, with a single start page, enables you to browse for anything from the product manual to the chart showing conducted emissions. Even the test fixture electrical schematic is included... The CB that looked this over eventually warmed to

RE: Surge Testing per EN 55024/EN61000-4-5

Mike, can't agree with you on this one. See Scotts comments in his e-mail. You test to prove things are as you think they are... Otherwise why test at all? Derek Walton Invensys --- This message is from the IEEE EMC Society Product Safety Technical

Re: RF Immunity Testing to 50V

Hi Kevin, we too can achieve high fields, currently about 80 v/m is our limit. Again, you may want to talk more offline Best regards, Derek. --- This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list.

Input for a presentation

Hi folks, Next month I'm going to give a talk on The status of EMC in America. This talk will be presented in England, Sept 16th and 18th. For the record I'm English, and have lived in the USA for 14 years working in the Military, Automotive, Aerospace and Industrial EMC areas. I have formed

Re: Input for a presentation

Jim, I became aware of this, I was at the Symposium too. The position I take is that the buyer of anything should be afforded some degree of protection. Some markets agree with this, ie we like drugs to have FDA approval, or we tend to pick parts with agency ( UL, FM, CSA etc ) approvals. Other

IEEE EMC Symposium

Dear list members, I have just finished writing a trip report which describes what I found interesting at the IEEE EMC Symposium in Denver last week: It's a section of my facilities newsletter. Anyone intersted in receiving a copy in Acrobat format please e-mail us at: lfresea...@aol.com Best

Re: Doubt on Measuring with Spectrum Analyser

Murial, my OATS has two antenna towers. I do this because I get very good rejection of ambients depending on which antenna I use. If practical, try rotating your antenna and see if there is a null in the ambient signal. The reorient your test object. Good luck, Derek Walton Owner L F Research

Room grounding

Chaps, The grounding of a shield room has always been a tricky subject. In the US we have the NEC code that basically want's everything connected, which contradicts some EMC requirements. The Shield room hence needs some tricks: 1) One of the functions of the outer skin is to terminate impinging

Re: Room grounding

Mike, sorry you disagree. Inside the room, all equipment is referenced to the room itself, there is no new safety risk introduced by the room being grounded differently. Outside the room, again, all equipment is referenced tightly to the room, so the operator does not see any differential.

Re: Laser pointers

Chaps, lets get real. Before we go banning laser pointers because of a potential fatality sometime, lets get rid of all the guns, stop drinking alcohol, and wear our seat belts! At this rate we will be suing the milk companies because milk contains FAT, FAT causes heart problems that lead to

Re: Laser pointers

Chris, My boss nearly died a few weeks ago because of a Sea Food allergy... does that mean we should ban shrimp? I have a cousin that was Hospitalized because of an allergy to Brazil nuts... ban them too? Not saying the possibility isn't there, just keep it in perspective... We are getting too

Re: Laser pointers

Gary, as a vegitarian(?), I don't know why anyone would eat shrimp... However, it came on a Pizza during a company event. Derek. - 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

Re: Laser pointers and alcohol

Antonio, I'm not sure what the implication of your message was, but I NEVER drink Alcohol, and I ALWAYS wear a seat belt. As a father of 2 little girls, safety is my number one concern in the world. Alas, laser pointers are less of a threat that the other things on the previous list. As an X

Re: Re[2]: Laser pointers

OK, perhaps the comparison to foods strayed from the context a little, a sign of the sue happy world we live in... However, what about power tools, you could inflict harm with a paper knife for goodness sake. Anyone remember all the fuss when superglue came out? The point is that for a few

Re: ANSI C63.4 -- ferrites

Ed, There is a material called Capcon, that acts as a distributed load. It works, but it's not low cost Derek. - 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

Re: suspect conducted emissions

When doing the cable test, make sure you have a 50 Ohm load on the length inside to room... Derek. - 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).

Re: CMOS Driver Chips.

Chris, you may want to read up on Latch up. CMOS has ( had ) this problem. The parts I've seen have the ouput stage shorted. The web sites of National, etc have app notes that talk about this. If you get stuck, e-mail me and I'll hunt some out for you. Best regards, Derek. - This

Re: Signal Line Output Surge Protection

Don, MOVS have a lot of Capacitance associated with them. Sometimes you can make use of that, in your case you may want to try back to back Diodes in series with the MOV. They have lower capacitance, hence capacitors in series have even lower capacitance. A spark gap will work fine as long as you

CE Mark image location

Bill, you may want to go to the following URL http://www.conformance.co.uk/CE_MARKING/CELOGO/ce_logo.html It has the CE mark in many formats. I advise clients to put the CE mark on each product that makes up a system. Best regards, Derek Walton L F Research EMC Design and Test Facility

ESD Network

Folks, can anyone tell me what components make up the ESD discharge model for ANSI C62.38-1994 Thanks, Derek Walton Owner L F Research EMC Design and Test Facility - This message is coming from the emc-pstc discussion list. To cancel your subscription, send mail to majord...@ieee.org

EU Product Standard for Electrical Actuators

Folks, can anyone suggest a EU product standard for EMC testing an electrical actuator. The product is used in HVAC applications. Thanks, Derek Walton Owner L F Research EMC Design and Test Facility - This message is coming from the emc-pstc discussion list. To cancel your

Re: Active Power Factor Correction

In a message dated 98-11-30 12:58:20 EST, plaw...@west.net writes: Hello Colleagues, I have recently learned of a technology whereby harmonic disturbances may be reduced via APFC (Active Power Factor Correction). This is apparently a device that injects cancellation harmonics back onto

IEEE Std 518-1982

Chaps, I've just received a copy of IEEE Std 518 I ordered, it's dated 1982. 16 years seems a very long time for a standard to remain current. Any one know of a later issue? Thanks, Derek Walton. Owner: L F Research EMC Design and Test Facility, Poplar Grove, IL, USA.

More on the X-TAL Osc.

Chaps, it looks like I was too brief when I first asked the question. The product is a PC card, the brains of which is a multifunction chip Two pins of this chip are for connection to an X-TAL and two tiny caps ( pF's ) to ground. The initial value for the caps was 47 pF, and the Radiated

X-TAL oscillators

Chaps, I've come across a board that radiates badly, the source appears to be the oscillator itself I managed to drop emissions by increasing the X-TAL resonant caps from 47pf to 150pf. All waveforms still looked fine. Any suggestions on what could be happening, and thoughts on the best ( ie

Re: Desiging Openings for EMC Compliance

Jim, you hit the nail on the head, even with extensive calculations, the error is large. Seasoned EMC chaps tend to ask for thin-walled Honeycombe openings with a depth at least 5 times the hole dia. If you can't live with a deep hole, life gets hard Derek Walton Owner: L F Research EMC

Re: The Microvolt Story

Ed, as Chairman of an EMC Society chapter I prefer to air my differences with list members directly. Perhaps it's my English upbringing. I would expect that the initiator of this message received a number of personal e-mails. Derek.

IEEE EMC Symposium

Folks, if anyone is planning to attend the upcoming EMC symposium in CO, would it be a good idea to have a little ( easy to find locally ) sticker on our badges that identified us as list members? It would be nice to get to know some of the faces behind the messages.. Just a thought, Derek.

Re: Product Safety Incident Tracking Services

In a message dated 98-07-08 21:04:57 EDT, geor...@lexmark.com writes: The only electrical product I recall in recent years that did result in both injuries and property damage was the coffee brewers that lacked adequate thermal cutoff design, and burned down some homes. This was widely

Re: EFT on ISA cards

In a message dated 98-07-07 02:31:48 EDT, treph...@macconnect.com writes: Testing AC lines will prove whether your card can withstand whatever EFT can pass through the power supply filtering, but just as important,EFT is as much a radiated immunity test as it is a conducted test. Often I/O

Re: Ce versus FCC

In a message dated 98-07-06 20:40:33 EDT, rbus...@es.com writes: A test house explained to me that the FCC allows either CISPR or FCC limits/procedures providing that one can determine worst case. Consequently, you have to test both ways (120 V 60Hz or 230V 50Hz) to determine which way you

Re: Ce versus FCC

Dwight, While pursuing a TCF route, this was discussed at length with our CB. The frequency was of secondary concern to the line voltage. We tested with both frequencies anyway because we can: it made no discernable difference to our emission or immunity data.. Best regards, Derek Walton

Re: CE versus FCC

Keith, with over 18 years in EMC I could go on a long time. Some examples this year already... My computer ( FCC Class B ) interferes with my cordless phones, to some degree on all 10 channels. My FAX machine ( FCC Class B ) interferes with my TV and some channels of my cordless phones.

Re: CE versus FCC

Brian, here is the US the manufacturer has is easy... But many things we buy don't work well together! Derek.

Re: New EMC requirements proposed for IEC60335

Folks, I posed the question of Immunity standards being enforced in the USA to Art Whal(?) of the FCC. He did not see the need for immunity enforcement. After a lengthy discussion I formed the opinion that it is most likely the FCC will never press this issue, it will have to come from another

Re: New EMC requirements proposed for IEC60335

Dave, I see here that we hold a different opinion... My opinion is that when I buy something I expect it to work. Perhaps with us all using windows this expectation has slipped a little ( come on LINUX! ). As a consumer, immunity testing is not a quality issue, it is a must. I don't hold true to

Re: CE mark self certification

Chaps, What in particular about a TCF contect puzzles you? Derek. Owner L F Research EMC Design and Test Facility - 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

Re: CE mark self certification

Bob, here is what I do I prepare a main report. In this report I give all the background data, the make up of the system, what specifically is there for EMC purposes etc.. As part of this report I have the table saying what the equipment has to meet, this table references additional reports

Re: NEAR/ FAR FIELD CORRELATION ISSUES

Ed, please send this out only if you think it's appropriate. Hi folks, I don't want to run the risk of offending list members, but what's the problem over test costs? I charge little more than the chap that repairs my car, or the guy that fixes my A/C. EMC is a part of life, live with it. I

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