RE: Certification of Access Control Equipment in the EU

(several inches instead of a few inches), you may need certification. Good luck. Don Don Umbdenstock Manager Compliance Engineering Tyco Safety Products / Sensormatic 6600 Congress Avenue Boca Raton, FL 33487 USA Phone: 561.912.6440 djumbdenst...@tycoint.com mailto:djumbdenst

RE: Harmonic/Flicker Measurement Equipment

We already had a California Instruments system to perform 61000-4-11. CI had a package that could extend the capability to harmonic and flicker. When Agilent abandoned us, we went to CI. We are please with the system. Don Umbdenstock Manager Compliance Engineering Tyco Safety Products

RE: Korean EMC Standards - where can I purchase?

The site referenced below has various links that will take one to different regulations and decrees; I am not sure about standards (haven’t looked recently). A caution, those documents that are offered in English are usually 1-2 revisions behind what is available in Korean. The site is

RE: EMC in the news: RFID Medical

125 kHz and 868 MHz. Interestingly, one would think filtering at the higher frequencies would be easier to implement, but indications are that the higher frequency had more hits. It doesn’t indicate the degree of compliance with the medical devices immunity requirements. Don 561 912 6440

EuP lot 7

Does anyone know where I can find either a copy or a draft copy of lot 7? Does anyone know if discussions are still occurring on lot 7? Don Umbdenstock Manager Compliance Engineering Tyco Safety Products / Sensormatic 6600 Congress Avenue Boca Raton, FL 33487 USA Phone: 561.912.6440 djumbdenst

RE: Antwort: Re: FCC requirements for Card Readers

readers operate at ~125 kHz. Don Umbdenstock Manager Compliance Engineering Tyco Safety Products / Sensormatic 6600 Congress Avenue Boca Raton, FL 33487 USA Phone: 561.912.6440 djumbdenst...@tycoint.com From: emc-p...@ieee.org [mailto:emc-p...@ieee.org] On Behalf Of rehel...@mmm.com Sent: Tuesday

Record Retention in the EU

The FCC is specific in how long compliance records are to be kept. Is there a similar requirement in Europe? I have not been able to come up with EMC, LV, or RTTE record retention requirements (if they exist). Am I missing something or are there no records? Thanks in advance for your help,

Withdrawal of UL 913 edition 6

Is anyone familiar with the reasoning behind the withdrawal of this standard? Does it mean that edition 7 becomes mandatory now instead of 2012? What are the changes driving edition 7? Regards, Don Umbdenstock Manager Compliance Engineering Tyco Safety Products / Sensormatic 6600 Congress

RE: Safety regulations

LPS designated power supplies are specified for ITE when there is no fire enclosure (i.e., plastic enclosure not qualified for fire enclosure). Other standards achieve fire protection by specifying a maximum of 15W power source if there is no fire enclosure (IEC 60065). Don Umbdenstock

RE: EMC test table construction plans

Umbdenstock Sensormatic -- From: Pommerenke, David[SMTP:davi...@ece.umr.edu] Reply To: Pommerenke, David Sent: Thursday, November 01, 2001 4:15 PM To: 'POWELL, DOUG'; EMC-PSTC (E-mail) Subject: RE: EMC test table construction plans Doug, For emissions

RE: EMC test table construction plans

, Don Umbdenstock Sensormatic -- From: POWELL, DOUG[SMTP:doug.pow...@aei.com] Reply To: POWELL, DOUG Sent: Thursday, November 01, 2001 12:37 PM To: EMC-PSTC (E-mail) Subject: EMC test table construction plans Hello all, I plan to construct my own

RE: The Trouble with Convention, The Final Chapter

. For those still in the dark about 20 log () or 10 log (), my suggestion is to go straight to the source -- ask the FCC what they specify for your situation. Don Umbdenstock Sensormatic -- From: Ken Javor[SMTP:ken.ja...@emccompliance.com] Sent: Monday, October 29, 2001 2

RE: one more thing about duty cycle...

. Best regards, Don Umbdenstock Sensormatic -- From: John Shinn[SMTP:john.sh...@sanmina.com] Reply To: john.sh...@sanmina.com Sent: Tuesday, October 30, 2001 8:19 PM To: umbdenst...@sensormatic.com; emc-p...@majordomo.ieee.org; stu...@timcoengr.com Subject

RE: The Trouble with Convention, The Final Chapter

to the source -- ask the FCC what they specify for your situation. Don Umbdenstock Sensormatic -- From: Ken Javor[SMTP:ken.ja...@emccompliance.com] Sent: Monday, October 29, 2001 2:41 PM To: umbdenst...@sensormatic.com; emc-p...@majordomo.ieee.org; dmck

The Trouble with Convention

cycle is expressed as 20*log (y) for this situation. It appears in this case the FCC is looking for average voltage, not average power. Speaking of power, don't forget the power of the sanity check :-) Best regards, Don Umbdenstock Sensormatic -- From: Ken Javor[SMTP:ken.ja

duty cycle closure

[ref]) = 20 log (a) + 20 log (V[ref]) In the last equation one sees the duty cycle isolated as 20 log (a) when referring to power in terms of voltage. Best regards, Don Umbdenstock Sensormatic -- From: Doug McKean[SMTP:dmck...@corp.auspex.com] Reply

RE: Is This Right?

: UMBDENSTOCK, DON Sent: Thursday, October 18, 2001 5:03 PM To: UMBDENSTOCK, DON; emc-p...@majordomo.ieee.org; stu...@timcoengr.com; 'Ken Javor' Subject: RE: duty cycle correction factors Perhaps I oversimplified. The definitions may be conditioned by what the FCC

RE: duty cycle correction factors

: Thu, Oct 18, 2001, 2:37 PM I wasn't going to weigh in on this but... what was presented by Mr. Umbdenstock is equivalent to saying that since 2 + 2 = 4, then 2 x 2 = 4. It is tautological. The decibel scale is a power ratio. If a signal has a particular duty cycle then it is the total

RE: duty cycle correction factors

Umbdenstock -- From: Ken Javor[SMTP:ken.ja...@emccompliance.com] Sent: Thursday, October 18, 2001 3:37 PM To: umbdenst...@sensormatic.com; emc-p...@majordomo.ieee.org; stu...@timcoengr.com Subject: Re: duty cycle correction factors I wasn't going to weigh

RE: duty cycle correction factors

Stuart, Duty cycle in 15.231 is related to a voltage ratio, therefore 20 log(duty cycle) will provide the correct factor. Demonstrate it to yourself. Start with a given value (say 100V), multiply this by some duty cycle (say 15% or .15). Convert the result to dB. This is your reference

RE: EMI trouble shoot inquiry

environment? Good luck, Don Umbdenstock Sensormatic -- From: wmf...@aol.com[SMTP:wmf...@aol.com] Reply To: wmf...@aol.com Sent: Monday, October 15, 2001 2:43 PM To: emc-p...@ieee.org Cc: jim.gi...@hedus.com Subject: EMI trouble shoot inquiry Group: I

RE: 2 GHz Amplifiers

Derek, One would be Final draft, ETSI EN 301 489-1 V1.3.1 (2001-07). Best regards, Don Umbdenstock Sensormatic -- From: lfresea...@aol.com[SMTP:lfresea...@aol.com] Reply To: lfresea...@aol.com Sent: Tuesday, October 09, 2001 3:53 PM To: emc-p

RE: Allowable Sound Pressure/Power Levels

Ron, OSHA has limits; don't know if they apply to your question. See 29 CFR 1910.95 Regards, Don Umbdenstock Sensormatic -- From: Ron Pickard[SMTP:rpick...@hypercom.com] Reply To: Ron Pickard Sent: Friday, September 28, 2001 2:47 PM To: emc-p...@ieee.org

RE: Surges on shielded lines

to ground. Hope this helps, Don Umbdenstock Sensormatic -- From: Dave Wilson[SMTP:dwil...@alidian.com] Reply To: Dave Wilson Sent: Friday, September 28, 2001 1:28 PM To: 'emc-p...@ieee.org' Subject: Surges on shielded lines I'm trying to get surge testing

RE: Steel ball for impact tests

unsafely (and repeatably), i.e., hazardous voltages were exposed. This is something you want to discover prior to having a NRTL witness or perform the test. Searching for a new sport, Don Umbdenstock Sensormatic -- From: Scott Lacey[SMTP:sco...@world.std.com] Reply To: Scott Lacey

RE: Steel ball for impact tests

:-( Best regards, Don Umbdenstock Sensormatic -- From: Jon Jones[SMTP:jon.jo...@ascom.co.uk] Reply To: Jon Jones Sent: Monday, September 24, 2001 8:59 AM To: Emc-Pstc (E-mail) Subject: Steel ball for impact tests Can anyone detail a manufacturer

RE: Swiss RTTE implementation

the intervention of a NB? Best regards, Don Umbdenstock Sensormatic -- From: CE-test - Ing. Gert Gremmen - ce-marking and more...[SMTP:cet...@cetest.nl] Reply To: CE-test - Ing. Gert Gremmen - ce-marking and more... Sent: Tuesday, September 18, 2001 1:41 PM To: emc-p

RE: Swiss Web Site

of RTTE on the referenced site. It appears that this particular directive has been adopted by Switzerland. This site did not address the EMC Directive. Don Umbdenstock Sensormatic -- From: Andre, Pierre-Marie[SMTP:pierre-marie.an...@intel.com] Reply To: Andre

RE: 2 GHz Amplifiers

). AFI Comtech PST IFI Kalmus Comments appreciated. Best regards, Don Umbdenstock Sensormatic --- This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. Visit our web site

2 GHz Amplifiers

regards, Don Umbdenstock Sensormatic --- 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

RE: Swiss Web Site

Thank you, Pierre-Marie. The site is nicely organized. I perused the subject of RTTE on the referenced site. It appears that this particular directive has been adopted by Switzerland. This site did not address the EMC Directive. Don Umbdenstock Sensormatic -- From: Andre

RE: ETSI EN 300 330-X

Bob, My understanding is that EN 300330-1 is a basic standard; EN 300330-2 is the calling standard. Similar to other basic standards, only the calling standards need to be announced (e.g., EN 50082-1 needs to be announced, not EN 61000-4-3). Regards, Don Umbdenstock Sensormatic

EN 61000-3-2 Amendment 14

Hello Forum, In the event anyone has not updated their Agilent harmonic test system to A14, the address below provides the means. http://www.agilent.com/find/regulatoryupgrade Best regards, Don Umbdenstock Sensormatic Electronics Corporation

RE: Noise from flourescent light ballasts?

Umbdenstock Sensormatic Electronics Corporation -- From: Chris Maxwell[SMTP:chris.maxw...@nettest.com] Reply To: Chris Maxwell Sent: Thursday, September 06, 2001 11:37 AM To: EMC-PSTC Internet Forum Subject: Noise from flourescent light ballasts? Hi all

RE: Power Amplifier for 2 GHz Immunity

amended. For now, the product family standard due in 2003 is EN 301489-1. Don Umbdenstock Sensormatic Electronics Corporation -- From: Pettit, Ghery[SMTP:ghery.pet...@intel.com] Sent: Thursday, September 06, 2001 12:17 PM To: 'umbdenst...@sensormatic.com'; rehel

RE: Power Amplifier for 2 GHz Immunity

Bob, EN 301489-1 due in 2003 calls for radiated immunity testing to 2 GHz. EN61000-4-3 also indicates testing to 2 GHz due to the portable phone market. Best regards, Don Umbdenstock Sensormatic Electronics Corporation -- From: rehel...@mmm.com[SMTP:rehel...@mmm.com] Sent

Power Amplifier for 2 GHz Immunity

Hello Forum, I was wondering what amplifier you are using for the 2 GHz testing requirement of EN61000-4-3? Any comments regarding if I had to do it over again, I would have . . . relative to your 2 GHz setup? Best regards, Don Umbdenstock Sensormatic

RE: FCC rule interpretation (add'l info)

20 dB higher in peak detection. This does not mean you can add 20 dB to the average limit for any signal condition. Is this issue the origin of the question? Best regards, Don Umbdenstock Sensormatic -- From: Stuart Lopata[SMTP:stu...@timcoengr.com] Reply To: Stuart Lopata

RE: Radio Systems Including Approved Radio Modules

26, 2000, viewable on the web at http://www.fcc.gov/Bureaus/Engineering_Technology/Public_Notices/2000/da0014 07.txt Best regards, Don Umbdenstock Sensormatic -- From: IEEE-EMC User Group[SMTP:ieee-...@itl.co.il] Reply To: IEEE-EMC User Group Sent: Monday, August

RE: ETSI EMC Standard

am curious to hear where the rest of the industry stands on this issue. Best regards, Don Umbdenstock Sensormatic -- From: umbdenst...@sensormatic.com[SMTP:umbdenst...@sensormatic.com] Reply To: umbdenst...@sensormatic.com Sent: Tuesday, August 07, 2001 1:19 PM

RE: ETSI EMC Standard

-field probe * chamber lining modifications Perhaps we can develop a database of options and trade-offs before we need to spend the big bucks. Don Umbdenstock Sensormatic ? -- From: wo...@sensormatic.com[SMTP:wo...@sensormatic.com] Reply To: wo...@sensormatic.com

RE: EN 61000-4-2 ESD Requirements

regards, Don Umbdenstock Sensormatic Electronics Corporation -- From: Brent DeWitt[SMTP:bdew...@ix.netcom.com] Reply To: Brent DeWitt Sent: Tuesday, July 31, 2001 11:24 PM To: Sandy Mazzola; emc-p...@ieee.org; emc-p...@majordomo.ieee.org Subject: RE: EN 61000-4

RE: FCC Standards

://www.fcc.gov/oet/info/rules/part15/part15_may24_01.pdf I have not found a similar site for Part 68. Hope this helps. Don Umbdenstock Sensormatic Electronics Corporation -- From: Muriel Bittencourt de Liz[SMTP:mur...@eel.ufsc.br] Reply To: Muriel Bittencourt de Liz Sent

RE: EN61000-3-2 +A14

volume), a case could be made for Class A. I strongly suggest anyone considering this route present this argument carefully to a Competent Body so as to provide justification in your files. My opinion only and not necessarily that of the Company. Don Umbdenstock Sensormatic Electronics Corporation

RE: CISPR Compliant Spectrum analyzer/receiver

The EMC-30 is spec'd for 75% relative humidity -- and they mean it. If you operate the instrument in RH above this, you will loose control, i.e., seems to be some shorting between front panel control functions. -- From: Ken Javor[SMTP:ken.ja...@emccompliance.com] Reply To:

RE: EMC-PSTC List Archive Site

New address: http://www.cfont.com/ -- From: Peter G Schreiner III[SMTP:p...@sciatl.com] Reply To: Peter G Schreiner III Sent: Friday, May 04, 2001 9:09 AM To: emc-p...@ieee.org Subject: EMC-PSTC List Archive Site Being new to the list, I would

RE: 2. 4 GHz cordless telephone, question of general interest

in the glazes or substrate. This will definitely warm up the fajita platter. :-) Don Umbdenstock -- From: Ken Javor[SMTP:ken.ja...@emccompliance.com] Reply To: Ken Javor Sent: Monday, April 23, 2001 9:50 AM To: dinst...@uk.xyratex.com Cc: emc-p...@ieee.org Subject

RE: IEC 61000-4-3

volume characteristics for emissions, but no one claimed more than a plane for immunity. For what its worth . . . Best regards, Don Umbdenstock Sensormatic Electronics Corporation -- From: michael.sundst...@nokia.com[SMTP:michael.sundst...@nokia.com] Reply To: michael.sundst

RE: commercial surveillance video cameras

, Don Umbdenstock Sensormatic Electronics Corp. -- From: Kirincic, Mark[SMTP:mark.kirin...@compaq.com] Reply To: Kirincic, Mark Sent: Thursday, April 05, 2001 12:31 PM To: 'John Coyle'; emc-p...@majordomo.ieee.org Subject: RE: commercial surveillance video

RE: PFC

; other equipment considered commercial and industrial equipment is Class A irrespective of the waveform. This is why so many people were eager to see A14 implemented as soon as possible. Best regards, Don Umbdenstock Sensormatic -- From: Steve Austin[SMTP:aus...@cassindustries.com

EMC software for pcb layout

Hello friends, Our PCB staff is looking for layout tools to enhance EMC compliance. Any suggestions? Best regards, Don Umbdenstock Sensormatic --- This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list

Product Robustness -- ESD

similar to this? If so, do you still do it today? Do you use other over-stressing test devices? Our PA dept would like to hear about your experiences in this area. Best regards, Don Umbdenstock Sensormatic Electronics Corporation --- This message is from

Basic Standards

it. Can someone point me to such a source? Best regards, Don Umbdenstock Sensormatic Electronics Corporation --- This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. To cancel your subscription, send mail

Agilent Support, A14 EN 61000-3-2

for A14 Donald J. Umbdenstock Senior Principal Engineer Compliance Engineering Sensormatic Electronics Corporation Dear Mr. Umbdenstock, Thank you for taking the time to so eloquently express your concern regarding our recent announcement to discontinue the Agilent 6843A Regulatory Testing

RE: Shielded Room

get our money's worth. The reflections are much less than a shielded room and ballpark results for initial measurements can be observed. Good luck, Don Umbdenstock Sensormatic -- From: Gorodetsky, Vitaly[SMTP:vgorodet...@canoga.com] Reply To: Gorodetsky, Vitaly Sent

RE: Calibration labs

We schedule in advance and usually get 1 week turnaround on cal plus shipping time. We specify 2nd day Fedex. This makes the disruption to our lab scheduling a minimum. Winter can pose some unexpected delays due to weather conditions on the open area test site. Plan your cals for summer when

Surge Testing per EN 50130-4

? Best regards, Don Umbdenstock Sensormatic --- 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 line: unsubscribe emc

RE(2): Which Antenna?

mitigation in the chamber and then final compliance measurements at the OATS. Hope this insight helps. Don Umbdenstock Sensormatic -- From: Tudor, Allen[SMTP:allen_tu...@pairgain.com] Reply To: Tudor, Allen Sent: Wednesday, November 15, 2000 11:36 AM

RE: Which Antenna?

measurements at the OATS. Hope this insight helps. Don Umbdenstock Sensormatic -- From: Tudor, Allen[SMTP:allen_tu...@pairgain.com] Reply To: Tudor, Allen Sent: Wednesday, November 15, 2000 11:36 AM To: emc-p...@ieee.org Subject: Which Antenna? Greetings

RE: SAR Measurements

that they would have knowledge of the limitations if any TCB did. If you wish to go straight to the source for exposure issues, that would be a Mr. Kwok Chan at the FCC. I know this did not answer your question directly, but I hope it helped. Don Umbdenstock -- From: Wismer, Sam

RE: Electron Flow

I came across an interesting reference. It appears that charge flow is both directions. See http://www.ee.ic.ac.uk/eee2proj/rtal97/physics.html especially Figure 5 at the bottom of the webpage. -- From: Lichtenstein, Ross[SMTP:ross.lichtenst...@owenscorning.com] Reply To:

RE: 900 MHz for industrial use

do not know about heavy industrial environment. Hope this helps, Don Umbdenstock Sensormatic Electronics Corp -- From: JENKINS, JEFF[SMTP:jeff.jenk...@aei.com] Reply To: JENKINS, JEFF Sent: Tuesday, September 26, 2000 4:59 PM To: emc-p...@ieee.org Subject

RE: Near Field Versus Far Field

Hello Joe, Consider the following -- in the far field (3 or 10 meters), a plane wave is monitored. In the near field, using either commercial or lab built near-field probes, either E field or H field emissions will be monitored separately. The E, H components will be isolated. The emission

RE: EN 61000-3-3

does dip, you need to worry about dmax, d(t), dc at a minimum; if it dips repetitively you also need to be concerned about Plt and Pst. Forum, does this sound like a reasonable approach? Regards, Don Umbdenstock -- From: Gary McInturff[SMTP:gary.mcintu...@worldwidepackets.com

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

for these 2 points at frequencies below about 10 MHz. What has been your experience in this regard? Even more curious, Don Umbdenstock -- From: Chris Collin[SMTP:globalass...@altavista.com] Sent: Tuesday, August 01, 2000 7:12 PM To: umbdenst...@sensormatic.com Cc

EN 61000-4-6 CDNs for a high speed bus.

Hello Friends, We are getting into faster interconnects that can be affected by the CDNs called out by EN 61000-4-6. Has anyone tested a system consisting of an EUT connected to various peripherals by USB, Firewire, 10 Base T or other bus configurations considered high speed today? It seems

RE: EFT/Burst

were able to observe the same type of failures in the lab when common mode EFT signals were applied. So this test does represent some real world possibilities. Don Umbdenstock -- From: Georg M. Dancau[SMTP:dan...@compuserve.com] Reply To: Georg M. Dancau Sent

CCTV Testing

Has anyone performed immunity testing on BW cameras? Kind regards, Don Umbdenstock Sensormatic --- This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. To cancel your subscription, send mail

RE: EFT/Burst

, not a regulatory issue. Good luck, Don Umbdenstock -- From: Roncone Paolo[SMTP:paolo.ronc...@compuprint.it] Reply To: Roncone Paolo Sent: Wednesday, June 07, 2000 11:45 AM To: 'emc-p...@ieee.org' Subject: EFT/Burst Group, we are currently discussing

CCTV EMC -- EN50132-2-1

of limiting resolution? Is that where the image is no longer discernable in low light? The clause states if resolution limit occurs at low light . . . would not all cameras limit at low light? As you can see, I am an amateur in this area. Any help would be appreciated. Kind regards, Don Umbdenstock

EN61000-4-6, shortening the test

anything. We have already reduced system cycle time to the 3 sec minimum. Any thoughts on how to reduce the test time of a conducted immunity test? Don Umbdenstock Sensormatic --- This message is from the IEEE EMC Society Product Safety Technical Committee emc

Alarm Systems Compliance

, the screen is so obliterated with sparkles that the image is indeterminate. What defines the cross-over point? How does one establish a repeatable, non-subjective criteria? Or is that beyond the intent of this standard? Your interpretations are appreciated. Don Umbdenstock Sensormatic

RE: EMC vs. Exi equipment

Amund, My feeling is that the test validates the protection. If devices are not correctly rated for the application or applied correctly for the intended use, the product may still be vulnerable. Regards, Don Umbdenstock -- From: Westin, Amund[SMTP:amund.wes...@dnv.com

Microwave Cables

would be appreciated. Also, a brief description, such as flexible, rigid, diameter, loss characteristics, typical connector system, etc would help. Any cable (or measurement) tips would be appreciated. Thanks, Don Umbdenstock Sensormatic

RE: Surge

and should have a negligible effect. It sounds like you have a case for a TCF. All you need is your Competent Body sign-off. Don Umbdenstock Sensormatic -- From: Dale Albright[SMTP:dale.albri...@flextronics.com] Reply To: Dale Albright Sent: Thursday, May 04, 2000 5:03

RE: Receivers and spectrum analysers

. If a situation such as the fm band is not your problem, maybe you should try one. Demos are free. If you are worried about harmonics of a huge ambient, a preselector will help that. Hope this helps some. Don Umbdenstock Sensormatic -- From: Colgan, Chris[SMTP:chris.col

RE: Steel Ball For Impact Test

We bought ours from a bearing manufacturer several years ago. It met the spec and was very cost effective ($6.00 rings a bell). -- From: jim_bac...@mail.monarch.com[SMTP:jim_bac...@mail.monarch.com] Reply To: jim_bac...@mail.monarch.com Sent: Tuesday, March 21, 2000

RE: Antenna factors to be used for NSA measurement

ever ongoing NSA studies. Don Umbdenstock . -- From: Robert Bonsen[SMTP:rbon...@orionscientific.com] Reply To: Robert Bonsen Sent: Wednesday, March 15, 2000 7:02 PM To: emc-p...@majordomo.ieee.org Subject: RE: Antenna factors to be used for NSA

RE: Antenna factors to be used for NSA measurement

on the answers you are getting and how much time you have. Just my $.02 worth, Don Umbdenstock Sensormatic -- From: Robert Bonsen[SMTP:rbon...@orionscientific.com] Reply To: Robert Bonsen Sent: Wednesday, March 15, 2000 1:47 PM To: paolo.ronc...@compuprint.it

RE: broad band EM noise

not be your friend's problem, but I could not help but notice the similarity in the humid conditions compared to the dry conditions. Your friend should try contacting the utility company. They do come out and check things out eventually, at least in Florida they do. Good luck, Don Umbdenstock Sensormatic

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

Jim, Does your product connect to any auxiliary equipment that has an earth connection, whether directly or indirectly? Don Umbdenstock Sensormatic -- From: Jim Hulbert[SMTP:hulbe...@pb.com] Reply To: Jim Hulbert Sent: Wednesday, March 01, 2000 10:32 AM

RE: conducted emissions test setup

Ken, Commonly available shielded rooms are made from galvanized steel panels. Does your comment mean that these chambers are not very good for the ground reference for conducted emissions tests? Don Umbdenstock -- From: Ken Javor[SMTP:ken.ja...@emccompliance.com] Reply

RE(2): Question on 15.31, Near-field

-field Hello group. I substantially agree with the comments of Allen Tudor Don Umbdenstock. My own view is : I believe the 40 dB / decade (of distance) is a questionable approximation for extrapolating the measurement antenna location being reduced from 10 meter to 3 or possibly 1

RE: Question on 15.31

substantiating higher roll-offs. This is probably more than you asked for; hope it helped. Don Umbdenstock . -- From: rehel...@mmm.com[SMTP:rehel...@mmm.com] Reply To: rehel...@mmm.com Sent: Friday, January 21, 2000 6:51 AM To: emc-p...@majordomo.ieee.org Subject

RE: Carpet tiles on ferrite tiles?

Why glue? Just roll out a piece of carpet. It won't move. If you are using the chamber for emissions precompliance and uniform field immunity, the impact of say a 10' x 10' piece of carpet should be insignificant. Don -- From: Tony J. O'Hara[SMTP:tonyoh...@compuserve.com]

RE: 3 meter lab

Brent, It depends. (Do you cringe when a response begins with it depends?). Do you have a lab nearby so that you can establish a baseline for improvement? In the past we developed products with a spectrum analyzer and a couple of antennas in the lab, but you had to get to know your lab

RE: Chamber and OATS Correlation

, but this correlated to within 1 dB of what was predicted by the REFRAD. I admit our sample universe is small at this time with only a handful of emissions to compare to. But these first results are promising. Don Umbdenstock Sensormatic -- From: Barry Ma

RE: Chamber and OATS Correlation

in the chamber was 7 dB off from the OATS value, but this correlated to within 1 dB of what was predicted by the REFRAD. I admit our sample universe is small at this time with only a handful of emissions to compare to. But these first results are promising. Don Umbdenstock Sensormatic

RE: Chamber and OATS Correlation

REFRAD -- Reference Radiator, a comb generator that puts out pulses at 10 kHz or 1 MHz or 5 MHz spacing. EMC Test Systems sells it under the model number REFRAD Model 4630B. The pulse amplitude is not specified, but the output is amplitude and frequency stable. Battery operated, can

RE: Chamber and OATS Coorelation

with only a handful of emissions to compare to. But these first results are promising. Don Umbdenstock Sensormatic -- From: Barry Ma[SMTP:barry...@altavista.com] Reply To: Barry Ma Sent: Tuesday, January 11, 2000 5:55 PM To: mmate...@foxboro.com Cc: emc-p

RE: EN61000-4-11

without the battery installed. Don Umbdenstock Sensormatic Statements are my own and not necessarily representing those of the Company. -- From: Morse, Earl[SMTP:earl.mo...@compaq.com] Reply To: Morse, Earl Sent: Tuesday, January 04, 2000 12:28 PM To: 'emc-p

RE: A-t/m vs A-t/cm

Notice that the multiplier is 4*pi and a power of 10 if you are looking for precision. I use 79.6 for meaningful engineering work that I deal with. -- From: Robert Macy[SMTP:m...@california.com] Reply To: Robert Macy Sent: Monday, November 22, 1999 10:45 PM To:

RE: NRTL acceptance

(documented) for the standards applicable to your product. Don Umbdenstock Sensormatic -- From: goedd...@sensormatic.com[SMTP:goedd...@sensormatic.com] Reply To: goedd...@sensormatic.com Sent: Friday, November 19, 1999 2:07 PM To: emc-p...@ieee.org Subject

RE: Reflector for Radiated Immunity Testing

are given. Total cost: $96 less rivets. Don Umbdenstock Sensormatic -- From: Matejic, Mirko[SMTP:mmate...@foxboro.com] Reply To: Matejic, Mirko Sent: Wednesday, October 27, 1999 11:05 AM To: emc-p...@majordomo.ieee.org Subject: RE: Reflector for Radiated

Printed Circuit Board Grounding

reference. The argument is that carving up the ground plane is justified by eliminating the coupling of dirty ground to other circuits in an overlap situation. I would like to hear what you do for pcb grounding and why you do it. Don Umbdenstock Sensormatic - This message is coming from

RE: Schaffner ESD gun Calibration

Hello Randall, We have the same model. We have ours calibrated at Liberty Labs (www.liberty-labs.com). They are responsive and price competitive. Hope this helps. Don Umbdenstock Sensormatic -- From: randall.flind...@emulex.com[SMTP:randall.flind...@emulex.com] on behalf

OATS Survey

inputs. Don Umbdenstock Sensormatic 561-989-7454 - 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 ed.pr...@cubic.com, jim_bac

RE: Average Measurements above 1 GHz

that was pulse modulated. The FCC required a mathematical average based on duty cycle instead of allowing the average detection of the spectrum analyzer. It was simple enough to do for our product so I did not fight it. Just thought I might raise a caution flag. Don Umbdenstock Sensormatic

RE: Immunity Problems ??

failed at 18 kV. The protection was improved to 20 kV and the problem was solved. Bottom line, specs only give an indication of expectations. Your assessment of your environment is the final word. Some members have given some good suggestions on diagnostics. Good luck. Don Umbdenstock Sensormatic

FW: OATS Rework Results

. Don Umbdenstock Sensormatic -- From: valer...@aol.com[SMTP:valer...@aol.com] Sent: Monday, August 30, 1999 6:21 PM To: umbdenst...@sensormatic.com Subject: Re: OATS Rework Results Don: I read your OATS Rework Info with great interest. I do not have anything

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