Re: Can't access the archives

Hi Bill et al If you scroll past the message and look at the last line of the This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list.PSTC header on every e-mail posting--you will see the following! All emc-pstc postings are archived and searchable

Re: Surge tester for 3-phase product.

Hi KC Schaffner EMC makes these testers. (Surge tester for 3-phase product.) If you access their web at www.schaffner.com you will find product info and lists of different country contacts! Regards Tony Colorado --- This message is from the IEEE EMC

EN 61000-3-2 and -3 equipment

Schaffner EMC Makes this equipment.(for EN61000-3-2/3) Go to their web site at www.schaffner.com. Or you can call Schaffner Western Region in Cal at 949-653-7148 Tony Colorado Does anybody know which equipment is available here in the US to do this tests after Agilent decided not to continue

RE: IEC 61000-4-3

Hi Kevin Antennas that have a significant length, and construction, such as a wide band Bilog made by Schaffner/Chase, are marked where their centers are and that is where all range distances should be measured from! It is my understanding that this phase center is a compromise as it moves for

Signal Generators

I am in need of a 2.45 GHz signal generator. I know that Agilent and Gigatronics make them. Anyone else? Yes, IFR systems aquired Marconi Instruments in Feb 1998. Marconi SG's are very popular in EMC sites! IFR's web is www.ifrsys.com Tony Colorado ---

Need a CDN-T2 for 61000-4-6 conducted immunity test

Hi Joe Schaffner makes a wide range of CDN's including a CDN-T2. I do not know if it' s also useable for EN 55024 but it does have a higher frequency performance IE to 230MHz. I would suggest you contact John Parnell at Schaffner 800-367-5566, or e-mail him at jparn...@schaffner.com Tony

Re: 3 meter anechoic room quote

Hi Ken I would like to alert you to a few issues regarding your request for info on cost of a 3-meter anechoic chamber! First you need to define what you mean by 3-meters or better yet, what you want to achieve with the chamber! If you just want a minimum size chamber, with a 3 meter range

Further on the EFT DC blocking capacitor

Here is further info on the EFT DC blocking capacitor use by Schaffner generators. It seems there can be 2 capacitors (in series) which is probably why the confusion started in the first place! Hope this clears it up! Tony (Colorado) To the EMC Discussion group, freom greg Senko Perhaps my last

Re: EFT DC blocking capacitor question

Sorry this is a little late, but it is Schaffner's official response to the recent question from Antonio Cinquino Re: EFT DC blocking capacitor on Dec 5th. {Posted by Tony O'Hara 12/11/2000, LARCTEC Marketing, Colorado] Re: EFT DC blocking capacitor question from Antonio Cinquino To the EMC

power line filters in the range 50 MHz to 12 GHz

Try Schaffner components. They have a large range of powerline filters, feedthough capacitors, and chokes and can supply custom ones to suit any need at a reasonable cost! Their web is www.schaffner.com. Tony Colorado --- This message is from the IEEE EMC

Re: Component Qualification

You may want to look at using a PCB Electromagnetic Scanning System! One of the advertised uses for these test devices is for quickly comparing EMC performance when component changes are made etc.! I believe there are 4 different manufacturers who make these devices. The one that I'm just

Job Opportunities

This is being posted for Schaffner, EMC Inc. Please respond to Greg Senko, 603-642-4694 or e-mail at gse...@schaffner.com SCHAFFNER EMC, INC. Schaffner offers the world's largest range of EMI filters, EMC instrumentation and test systems for radiated and conducted interference, and advanced

RE: 8591EM monitor output

A modulator for PAL is different than NTSC! PAL receivers use different frequencies and I also think there are other differences!) . However, I would assume that if you're in a locality that has PAL receivers then you should be able to easily get a PAL modulator. Remember also, that most new

Re: Mars lander problem

It's only software!! Seems like the report from the JPL Special Review Board on the Loss of the Mars Polar Lander blames the software! They clearly state (section 7.7.2 in pdf file #4) that The touchdown sensors characteristically generate a false momentary signal at leg deployment. This

To those wanting more info on NASA Mars failure report

Sorry, my original posting may have misled those who have asked for more info. The e-mail I was refering to is simply the press release and has little more technical info. However, I do now have a copy of the complete NASA report! It is in 5 separate PDF files each 400k-500k. This has LOTS of

RE: Mars Lander EMC problem?

Tony, I don't think it was actually EMC. The report I saw on CNN said the legs opened with a jolt, fooling the sensors which were supposed to cut the retro rockets when they detected the shock of landing. Scott Lacey It looks like Scott Lacey is right, thank you! I made the assumption that

Re: Mars Lander EMC problem?

Hi I thought many people would be interested in this as it looks like the recent NASA Mars Lander loss was due to EMI/EMC problems! I have just extracted a small piece of the e-mail report I got! Contact me directly if anyone wants the entire e-mail. From Peggy Wilhide Headquarters, Washington,

Re: Receivers and spectrum analysers

Although I am also a sales rep (and an engineer!) I agree with the fact that a preamp and or pr- selector can make a considerable improvement to the SA's performance. Schaffner/Chase's preselector was designed especially to work with all SA's and particularly the Advantest. But, you might also

dBu

Hi Dave Here is probably more than you ever wanted to know about dBu. It is extracted from the book Audio Precision Audio Measurement Handbook. Audio Precision is the world's leading manufacturer of precision audio measuring and test equipment. There is also a rather lengthy page discussion on

RE: Lead Banned in Europe Japan? What abt MTBE?

Hi Chris Indeed, your comments (copied below) may well be happening now, at least in the US! I applaud the activities of the Politically Correct, Environmental police, Nature preserving amongst us, but I sometimes wonder if their enthusiasm is insufficiently tempered with a longer term view, or

Re: Looking for tunable dipole antenna.

Schaffner/Chase makes a set of 2 tuneable dipole antennas 30Mhz to 300MHz 300MHz to 1GHz. You can contact them at web www.schaffner.com or 973-379-7778 Tony Colorado - This message is coming from the emc-pstc discussion list. To cancel your subscription, send mail to majord...@ieee.org

RF absorbers - 61000-4-3

Hi David In my experience that is just a little too short. The smallest chamber I'm familiar with that would satisfy 61000-4-3 (80MHz -1GHz) is 7L x 3.4W x 3 H meters. This size is usually called a compact anechoic chamber. It can also be effectively used for pre-compliance of emissions testing!

Buying a VCR

Regarding your new VCR problems! The one thing you said that makes the least technical sense is that This was, of course, true even when the VCR was turned off. When a VCR is turned off, the RF signal from your cable is switched directly to the output RF cable that goes to your TV cable input.

RE: FCC part 15 class B, GTEM?

The FCC allowed GTEMs to be used as an alternative test site for making radiated emissions measurements under Part 15 of the FCC rules on Dec 2 1993 via public notice #40830. Regarding correlation measurements: this Public Notice states that Acceptable comparison data must be filed with the

RE: ESD EN 61000-4-2 question

The standard anti ESD wrist strap used by electronic assemblers etc. to avoid electrostatic build-up on their bodies also has a resistance of about that value (1 Mohm) to ground.) This resistance value is chosen as a compromise to be both low enough to prevent ESD build up, but also to be high

carbon-impregnated foam pyramids

Re:How to measure the absorption characteristics of the carbon-impregnated foam pyramids? This is a very difficult measurement to make! Dr. Robert Johnk at NIST (National Institute of Science and Technology) in Boulder, Colorado has recently developed a new method of doing this. He can be

Posters

Hi Mike Regarding the Chase (now Schaffner EMC!) immunity emissions posters (there are now one of each!) your local Schaffner EMC Test RF products representative should have them. If you need to, you can find out their phone etc. by visiting Schaffner's Web site at www.schaffner.com. Regards

E H Near Field Probes

Hi Richard Schaffner-EMC has both RF far-field E H isotropic probes and near field E H probe sets. Their EMC-20, used typically for immunity E-field measurements in V/M or W/M squared, measures from 100kHz to 3GHz, with 0.01V/M resolution and can be used stand-alone or via fiber optic. They

ESD-Pink Poly Bags

You are quite right! It is particulary important to realize that an actual Electro-Static discharge is not necessary to cause damage to circuits inside a pink poly bag. For example, if a person is highly charged from static but only goes near the bag and there is no actual zap - even the

Re: Power Inductor for Power Supply Design

Try INTERMARK (Kitagawa) at 212-629-3620 or www.intermark-usa.com They have some surface mount chip ferrite beads that are 3A and typically 1300 Ohms at 60MHz and are 1.3 mm high (IM-HH-1M4532-132). They also make 6A parts. Tony O'Hara LARCTEC Marketing Colorado I am looking for a 10 uH power

Re: Ferrite pads vendors

Just for clarification, Kitagawa and INTERMARK (which has already been identified as a maufacturer of Ferrite IC pads) are one and the same companies. In USA use INTERMARK-21-629-3620 or www.ingress.com/~im-usa Tony O'Hara LARCTEC Marketing Colorado Hello group, there is a company called

Re:Ferrite pads vendors

INTERMARK USA at 212-629-3620 makes these. Web is www.ingress.com/~im-usa Tony O'Hara LARCTEC Marketing Colorado - 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-Antenna Beamwidth

I have complete polar diagrams on the CBL6141 (compact X-wing) but not the CBL6140. Call Joe Hiens - Schaffner/Chase at 800-367-5566 x253 I'm sure he can get them for you! Tony O'Hara LARCTEC Marketing Colorado - This message is coming from the emc-pstc discussion list. To cancel your

Re: explanation of ESD events with coins in baggie.

Ok. Not as complex as I thought-in the TV! It sounds like simple RF interference through the antenna. However, I have just tried shaking the coins in a baggie at my computer monitor - nothing! Now at a 24 year old TV on wire antennas in my basement. I got nothing at VHF frequencies (54MHz to

Re: explanation of ESD events with coins in baggie.

Rene, That is an interesting phenomenon! If you could give me a more detailed description of the TV distortion and black lines I might be able to explain at least what was happening inside the TV set (I worked many years in TV R D). This in turn might help others to explain what ESD or EMI effect

Re: New EMC requirements

Hi Derek Sorry, but I feel compelled to provide another point of view-about US products failing! I came to the US more than 30 years ago and quickly subscribed to Consumer Reports, which I always use as a guide to buy just about any appliance. Perhaps, as a consequence, I have had a totally

Re: emc test cells

As far as Schaffner is concerned, see Page 12 of their new EMC products catalog (690-505A/6/98) concerning their emCell. If clearly says; under Emission testing TEM-Cell products have limited applicability to radiated testing, as it is very difficult to correlate near-field measurements with

Re; Radiation Monitors

As someone has already noted, Wandel Goltermann make a number of different hand held RF radiation monitors including a state-of the-art personal RF safety monitor. In the US these are available from Chase Systems at 973-252-6605. Tony O'Hara LARCTEC Marketing Colorado. - This message

Help: Denver Symposium 1998

Hi We need your help! One of the tasks of the Denver 1998 International Symposium on EMC organizers is to provided meeting rooms during the symposium for various committees. We are presently trying to contact everyone who leads such a committee in order to confirm details of their requirements

Brian Kurde's questions 1/8/98: Conducted Immunity

Hi Brian I am forwarding this response by Chase EMC as they have been having problems axcessing this system! Hope it helps! Message: 1000-2-6 is simply trying to provide a repeatible method for radiated immunity testing at frequencies below 80MHz. Becasue of the problems associated with low

Austin Symposium feedback

9/17/97 This is a SUMMARY OF INPUTS ON AUSTIN SYMPOSIUM Thanks to all the people (14) who responded to my request for feedback on the 1997 IEEE EMC Austin Symposium. Below is a summary of the recurring comments. (Note:- These comments are also somewhat prejudiced from other sources, particularly

Austin EMC-IEEE Show feedback

Hi all, As the Local Arrangements Chair of the organising committe for the IEEE 1998 International Syposium on EMC to be held in Denver, Colorado I am interested in any feedback from those who attended last weeks 1997 symposium in Austin. The Austin Symposium was great but we plan to be even

Results of attached files tests

Hi All Here are the results of my test to see who could handle a SMALL attached file encoded in MIME. First let me thank all the people who responded. There were (to date!) 52 replies. Although there was 3 strange replies-2 were messages they were out of the office (Is this automatic?) The

Re: Small 1000-4-3 Chamber

Jim Eichner asked if I had subscription inf. etc. for the mag. Test Measurement Europe. I'm afraid I don't, only the pages of the article were mailed to me, by Chase USA! However, my previous e-mail asked for help here, and I have now noticed that the article's author David Marsh, can be

Re: Small 1000-4-3 chamber

In Test Measurement Europe magazine (May 1997) there is a good article by David Marsh titled -Test Cells Monitor Immunity or Emissions-which covers using small test cells for immunity testing. Different manufactures are discussed and a table is shown with manufacturers basic specs etc. Hope this

Re-User-Friendly Standards

Hi Richard: Regarding your personal preferences on User-Friendliness of standards-I couldn’t agree more! What you are asking for applies to ALL technical writings/publications. The first task of a technical writer (at least a good one!) should be to analyze the user:- Who is basically

Re: Measuring AC

Hi Max YouAsked Does anyone know of a good method (or have any ideas) of how I could reduce line voltage down to low (DC) levels in order to measure the line voltage with an AD converter. Why not just use a precision voltage divider, and then feed the reduced ac voltage to your A/D. If you need