The picture I have in my mind is that there's a (or several) relatively small
hot spot(s) - you could say will-o'-the-wisp(s) - that dart around the test
chamber as the paddles move. Therefore my understanding is that a large system
isn't simultaneously illuminated by the reverb method.
Luke
Hi All
Can any one provide a data sheet for an IFI EFG-2 Antenna.
Regards
Andy
Andrew P. Price
Principle Environmental Engineer, (EMC Specialist)
SELEX ES, A Finmeccanica Company
Sigma House
Basildon
Essex
SS14 3EL
* Tel EMC LAB : +44 (0)1268 883308
*Mobile : +44 (0)7507 854888
email :
Well, an area of constructive or destructive interference is going to have
dimensions on the order of a half-wavelength. That sets the upper bound on
the illumination spot-size. Clearly, the spot size decrease with increasing
frequency.
Ken Javor
Phone: (256) 650-5261
From: Luke Turnbull
A little background first. I am testing single phase commercial soft serve ice
cream machine similar to what you might find at a fast food restaurant or a
local ice cream vendor. The unit normally draws less than 1A of current until
the compressor and motors turn on, at that point the current
I have a client who is looking for a low volume contract manufacturer
located in Asia (preferably Taiwan or China) who has a EN 80079-34
registered quality system in place.
Any suggestions?
Regards,
Tom Smith, P.Eng
Principal Engineer
TJS Technical Services Inc.
Tel: +1 403-612-6664
Email:
I hear that there is a new EMC Directive being put forward. (The current
directive is Directive EMC 2004/108/EC.)
Does anyone know what changes this proposed new EMC Directive implements.
Jim
__
James L. Knighten, Ph.D.
EMC Engineer
Teradata Corporation
17095 Via Del
In message
2d77bd88981bd243829b548acfc608bb01d1c...@uusnwe1k.na.utcmail.com,
dated Thu, 9 May 2013, Wiseman, Joshua E
joshua.e.wise...@carrier.utc.com writes:
With this type of machine I have been referring to A.14 of IEC
61000-3-3 for the test criteria. There are a couple of items in A.14
I view the power density concentrations as varying density little clouds,
chimera, moving regularly in 3 dimensions, and continuously changing their
dimensions as they move. The presence of the ground plane, stirrer supports,
antenna and EUT would have the motions not always linear. The motions
Gregory,
I find reference to it on the Internet.
http://www.metlabs.com/blog/tag/euanb/
Jim
__
James L. Knighten, Ph.D.
EMC Engineer
Teradata Corporation
17095 Via Del Campo
San Diego, CA 92127
858-485-2537 - phone
858-485-3788 - fax (unattended)
From: Popp, Greg -
Will you provide details as to where you obtained your information?
Thanks,
Gregory Popp
gp...@ysi.commailto:gp...@ysi.com
www.ysi.comhttp://www.ysi.com/
From: Knighten, Jim L [mailto:jim.knigh...@teradata.com]
Sent: Thursday, May 09, 2013 12:17 PM
To: EMC-PSTC@LISTSERV.IEEE.ORG
Subject: [PSES]
There is a nice little demo that one can usually see at the EMC Symposium
where someone (don¹t recall who) has a small reverb chamber with some
fluorescent lamps that come on and go off as the paddle is stirred.
Ken Javor
Phone: (256) 650-5261
From: Ed Price edpr...@cox.net
Date: Thu, 9 May
They, a grouping of 'them', met in December. Here is a synopsis:
http://www.metlabs.com/blog/emc/proposed-emc-directive-revision-has-new-not
ified-body-requirements/
Perhaps the EMC experts of this august body can expound for the corps of
unwashed compliance engineers.
In a similar conspiracy,
That would be great to see; do you make us look in through a shielded window
or do we get to go inside and hold one of the fluorescent tubes?
Ed Price
WB6WSN
Chula Vista, CA USA
From: Frank Krozel [mailto:fr...@electronicinstrument.com]
Sent: Thursday, May 09, 2013 10:23 AM
To:
You will find information on the New Legislative Framework (NLF) alignment for
the EMC Directive at the following link.
http://ec.europa.eu/enterprise/sectors/electrical/emc/index_en.htm
If your e-mail accepts embedded links, you can find the draft
I received an email from NIST this morning. They (EUANB) have met again on
May 3rd in Dublin, Ireland.
The information I have is the revision will be adopted in October 2013,
publication by the end of the year, and then they will prepare guidelines
for the transition period between the current
Yes that is correct.
Respectfully, Frank Krozelt: 1-630-924-1600 f: 630-477-0321 e:
fr...@electronicinstrument.com
BSEE, AASEET, Lic# PG-18-19178, KG9H
~~
Electronic Instrument Associates-Central, Inc since 1971
w:
Thanks for the links, Ted.
Some context on the EU legislative process - The document Ted provided the
links to is the input proposal from the EU Commission to the Council and the
Parliament. As those two houses debate things, amendments to the Commission
proposal will be put forward and argued
Ed,
Reminds me of when I first read up on a Gigawatt laser. I tried to image how
the measured the output. Did they put the worst performing technican on the
range and have him hold up the photometer and yell - Okay turn it on!
In checking their website I didn't notice any new technician
In message
d250d01e39356a4e9cc3b4b459d66550951a0...@ms-cda-01.advanced-input.com,
dated Thu, 9 May 2013, McInturff, Gary gary.mcintu...@esterline.com
writes:
Reminds me of when I first read up on a Gigawatt laser. I tried to
image how the measured the output. Did they put the worst
I was then and am still the casual observer of reverb testing, but have noticed
over the course of a number of conversations on MIL-STD testing there seems to
be an oxymoronic appearance to the processes without a detailed definition or
explanation of how a particular process came about.
And
The large size you mention rings a faint bell of memory...
There was some caution about using a chamber at frequencies above its first
resonance which is based on size.
The peaks and nulls of the multi-modal chamber then skew the reverb pattern
along those peaks and nulls.
Do I remember
Don¹t understand the post below. The original post starting this thread only
asked for definitions. My initial response cited the fact that MIL-STD-461
only allows mode-tuned, not mode-stirred testing. A later post seemed to
imply that the higher the frequency, the more paddle positions would be
In the spirit of the changes and on a slim chance this was not brought up
before,
there will be updated LVD and new RE Directive, formerly known as RTTE
Directive coming to your neighborhood theater.
RE is a new Radio Equipment directive, dropping Telecom and Terminal out of
it.
Main idea is
Brian,
Based on a quick reading, I think that for the case of manufacturers who take
responsibility to self-declare compliance, the draft new directive makes few
changes to the current rules. For the use of 3rd party experts (Conformity
Assessment Bodies or Notified Bodies) who are used to
Bill:
I was responding with the best anecdotal experience that I had on the subject,
but what I described was actually a big “science project.” I was testing,
actually, investigating might be a better term, the shielding effectiveness of
various compartments of what became the AGM-109
Way back once upon a time, we had tested a shielded chamber, that needed,
according to the spec's, a SE higher than some number like you mention. Our
initial testing revealed a few weak points. The several re-designs fixed
those, but the purchase spec for the interface panel to the outside
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