Richard,
Thanks for your advice. The products include battery-operated audio, video or
photographic devices, i.e., MP3 players, portable media players, digital
cameras, etc., and most of pc peripherals, i.e., pc cards, USB hubs, mouses,
etc., attached to card slots inside personal computer or U
That's the place!
From: Knighten, Jim L [mailto:jk100...@ncr.com]
Sent: Tuesday, March 15, 2005 2:30 PM
To: Pettit, Ghery; Grasso, Charles; khar...@lexmark.com;
emc-p...@ieee.org
Subject: RE: OATS Ground Plane Material
Aloha
_
James L. Knighten, Ph.D.
Teradata, a division of
Aloha
_
James L. Knighten, Ph.D.
Teradata, a division of NCR http://www.ncr.com
17095 Via del Campo
San Diego, CA 92127
tel: 858-485-2537
fax: 858-485-3788
From: owner-emc-p...@listserv.ieee.org
[mailto:owner-emc-p...@listserv.ieee.org] On Behalf Of Pettit, G
Thanks to all of you who took the time to reply.
That was very considerate.
I was able to reach the appropriate person and receive an answer on my
question.
What I did find out was the phone system was just changed so most of the old
numbers are not good.
The number that did work is - - - 240
I fully agree with Chas, For further guidance on this issue please
check out ANSI C63.7:Para.6.3 (1992) "American National Standard Guide
for Construction of Open Area Test Sites for Performing Radiated
Emission Measurements".
It states: "Thick (several mm or more) dielectric material such as
S
Charles is right, the EMC Society does go back a bit, like to 1957.
We'll be celebrating our 50th Anniversary in 2007. Any guesses where
the symposium will be? Start making your plans to attend.
Ghery S. Pettit
From: owner-emc-p...@listserv.ieee.org
[mailto:owner-emc-p...@listserv.ieee.org] O
Raymond,
The answer depends on the type of products you supply. If you could be more
specific the replies you receive would be more focused.
Richard Hughes
In a message dated 15/03/2005 17:55:59 GMT Standard Time,
raymond...@omnisourceasia.com.hk writes:
The scope of LVD directive include
HI Keith - Well the EMC Society goes back a long way and
papers were written in the early days of the relative performace
of different OATS constructions.
The conclusion - do NOT cover the screen.
Best Regards
Charles Grasso
Senior Compliance Engineer
Echostar Communications Corp.
Tel: 303-706
I'm wondering if concrete would be a better "pavement" material than
asphalt for this application.
There are fiber reinforced "topping mixes" that may have the strength to
hold up in a thin layer over the top of the hardware cloth. Some of
these mixes are intended to be put down with no bond to t
khar...@lexmark.com asked
>> Has anyone attempted to imbed an OATS ground screen in asphalt? A new
parking lot is going in near our lab and I have a chance to install an
OATS. The stack-up will be gravel with 3" base asphalt and a 1" asphalt
...<<
Keith,
At one place I worked, we installed a g
-Original Message-
From: khar...@lexmark.com [ mailto:khar...@lexmark.com]
Sent: Tuesday, March 15, 2005 7:55 AM
To: emc-p...@ieee.org
Subject: OATS Ground Plane Material
Has anyone attempted to imbed an OATS ground screen in asphalt? A new parking
lot is going in near our lab an
The scope of LVD directive includes electrical products operating 50-1000
Vac/75-1500 Vdc. On the market, a lot of electrical products especially
electronic products are operating under 50 Vac/75 Vdc. Why doesn't LVD
Directive cover the products operating under such voltage? Can someone advise
Keith,
I would be concerned with using ground plane material that would not interact
with its intended
environment. If there is interaction, then site attenuation requirements would
likely become an
issue, certainly over time, or it might be an issue to begin with. Will there
be a well defined
gro
The EMI lab I used to work for in the late eighties had the ground plane
covered with a thin layer of asphalt on one of their sites. I believe they
still have the same setup, so obviously they are meeting the site attenuation
requirements even with ground plane under the asphalt.
Regards, Ravin
Has anyone attempted to imbed an OATS ground screen in asphalt? A new
parking lot is going in near our lab and I have a chance to install an
OATS. The stack-up will be gravel with 3" base asphalt and a 1" asphalt
cap. I have plenty of copper screen and was considering putting it between
the asph
Good morning group.
I need clarification on a technical issue from CDRH on a new product we have
in the works.
All the contact phone numbers I have for CDRH no longer work.
All I get are messages that "this mail box has not been set-up".
All my e-mail's have also gone unanswered.
I have tried
Pierre,
Out of over 2,800 electronics books in my personal library,
Grounding and Noise Reduction Practices, published by SDS Data
Systems in Pomona, California
immediately comes to mind. This book was sponsored by the Air Force
Rocket Propulsion Laboratory. I can't find a copyright date or
This (telecoms) isn't my field, so forgive me if I'm barking up
completely the wrong tree but is the following of any use?
BS EN 50310:2000
Application of equipotential bonding and earthing in buildings with
information technology equipment
Regards
Nick.
At 10:25 am + 15/3/05, John Allen wr
In article <001901c52949$4d6a7120$0301a8c0@johnallen>, John Allen
writes
>There used to be an ECMA standard or Technical Report on
>interconnections between buildings etc., which did address earthing
>of cables in such circumstances but it no longer seems to be
>available!
>
>C
I think you may be looking fr ECMA 97. The isolation requirements were then
inclused into an ISO/IEC standard under the responsability of JTC1. However,
I don't recall the number of the ISO/IEC standard...
Richard Hughes
This message is from the IEEE Product Safety Engineering Society
emc-pstc
Pierre & Friends
There used to be an ECMA standard or Technical Report on interconnections
between buildings etc., which did address earthing of cables in such
circumstances but it no longer seems to be available!
Can anyone identify which one that was?
John Allen
(from home - as I have now b
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