Why not achieve copper balance by adding extra grounded areas on the
surface; ie, copper fill pegged to the normal ground layer(s) at multiple
points? Large areas can be gridded in some fashion; it doesn't have to be
solid copper.
I'm one who does not like to see floating copper, of any size
No. Paul, there are none.
There are no exceptions in the EMC directive or the low voltage directive
for beta testing and no way of getting around the regulations by any label
of non-conformance. In the EMC directive any relevant apparatus placed
on the market or taken into service must meet the
I agree - what is it? I tried looking it up in some of my PC design books at
the start of this one and came up blank. Does it go by another name?
-Original Message-
From: rehel...@mmm.com [mailto:rehel...@mmm.com]
Sent: Thursday, January 18, 2001 8:15 AM
To: emc-p...@majordomo.ieee.org
All-
Thank you for the responses, I was able to read the scopes at this link:
http://ulstandardsinfonet.ul.com/scopes/
Interesting to note that it looks like UL split IEC 1010-1 into THREE
standards:
UL3101-1 STANDARD FOR SAFETY FOR ELECTRICAL EQUIPMENT FOR LABORATORY USE
UL3111-1 STANDARD FOR
forwarding for e...@euroconsult.com
Reply Separator
Subject:emc-pstc discussion list
Author: e...@euroconsult.com
List-Post: emc-pstc@listserv.ieee.org
Date: 1/18/01 1:37 PM
Art Michael, a member of the emc-pstc discussion list, forwarded to
me
I make them ground it with appropriately spaced vias.
-Original Message-
From: Perry Qu [mailto:perry...@alcatel.com]
Sent: Thursday, January 18, 2001 4:19 PM
To: Roman, Dan
Cc: 'Stephen Phillips'; rehel...@mmm.com; emc-p...@majordomo.ieee.org;
DORIN OPREA
Subject: Re: Copper Thieving
Gary,
The measurement is made with all power supplies in parallel, but
you can exceed the 3.5 mA limit if you provide a warning to ground equipment
before connecting. With standard power cords this is done by having the ground
pin slightly longer than the line and neutral.
David
David Gelfand
Hi! Dan:
I understand that EMC guys don't want to see the floating coppers on the PCB
because of ESD and/or emission problem. But on the manufacture side, they claim
that if you don't do copper balance on the layer where you have large area
without copper, you will sure have over-eching in that
In a message dated 1/17/01, Courtland Thomas write:
I have a question concerning coninuing compliance for Part 68. I believe
that we are required to submit units for testing every six months. If the
FCC audits and finds that the test reports aren't up to date, then there can
be problems. This
Chris,
Just be careful. Many labs say they will do it, but end up sub-contracting
the various tests to other labs. Depending upon the nature of your
equipment, not all labs will have the facilities to perform the fire tests,
earthquake, vibration, etc.. Thus, you may find out that your
Hey Derek - Don't be shy. Can't we be all party to
some of the dos donts??
---
This message is from the IEEE EMC Society Product Safety
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To cancel your subscription, send mail to:
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with
How does electrically floating copper interact with electromagnetic fields?
David
- Original Message -
From: Roman, Dan dan.ro...@dialogic.com
To: 'Stephen Phillips' step...@cisco.com; rehel...@mmm.com;
emc-p...@majordomo.ieee.org
Sent: Thursday, January 18, 2001 12:32 PM
Subject: RE:
I made an incorrect statement. GS marking is not mandatory, but compliance
is mandatory if the equipment is covered by the Equipment Safety Law.
However, you will find that many customers will demand the GS mark.
Richard Woods
--
From: WOODS, RICHARD
Sent: Thursday, January 18, 2001
The GS mark is mandatory for all equipment covered by the Equipment Safety
Law. The equipment must comply with all applicable national regulations
including worker health regulations. For example, PCs used as workstations
must comply with EN60950 as well as the German ergonomic standard ZH1 which
Hi Chris,
The correct response to this question is: Check with your prospective
customers. Each RBOC and CLEC has a different bent on who's tests they will
accept and there are always exceptions to the hard and fast operating
procedures proclaimed at the annual conferences. There are many labs
Attached is the Appendix BC of the previously send document.
APPENDIX B.doc
Richard Woods
APPENDIX B.doc
Description: MS-Word document
Attached is the Appendix A of the previously send document. Appendix BC
will follow.
appendix A.doc
Richard Woods
appendix A.doc
Description: MS-Word document
Dan,
Would you please point out what kinds of EMI headaches this would cause?
Thanks, Abbas
At 12:32 PM 1/18/01 -0500, Roman, Dan wrote:
Remember that you can also cause yourself all kinds of EMI headaches if you
have electrically floating copper areas or patterns on the board. It has
lead
Remember that you can also cause yourself all kinds of EMI headaches if you
have electrically floating copper areas or patterns on the board. It has
lead to many arguments with the CAD department over the years!
-- Dan
-Original Message-
From: Stephen Phillips
Attached is a Word file that describes the approval process in Australia.
The annex will be sent in a second e-mail due to size constraints.
explanatory notes.doc
Richard Woods
explanatory notes.doc
Description: MS-Word document
Dave, Think this is what you are looking for:-
http://www.tm.agilent.com/classes/MasterServlet?view=productdatasheetpro-It
emID=101990language=englocale=USFamilyTitle=Related%20Product
Phillip Godfrey - Manager, Product Safety
KTL Dallas, Inc.
802, N.Kealy,
Lewisville,
Texas 75057-3136
Tel
Hello all,
The reason why UL has split IEC 61010-1 into two standards (UL 3101-1 and
3111-1) has to do with the Instrument Society of America (ISA). The US
National Standard for Laboratory Equipment has been owned by UL while the US
National Standard for Test and Measurement Equipment has been
.. and to maintain even etching and plating distribution
over the whole board and thus avoid problems during PCB
manufacture
-Original Message-
From: Stephen Phillips [mailto:step...@cisco.com]
Sent: 18 January 2001 14:33
To: rehel...@mmm.com;
As I posted earlier, in theory any OSHA certified lab should qualify as
a NRTL. I find it interesting that they don't even have to have NEBS items
listed in their accreditation standards just be a OSHA NRTL. I don't have
the exact web address but you can check this who has what on the WEB. The
Ralph,
Is the EMCAB-1 to which you refer the one issued by Industry Canada, If so, it
is EMCAB-1 Issue 3
and can be downloaded (in PDF) for free at:
http://strategis.ic.gc.ca/SSG/sf01004e.html
Please note that as this document's title (EMC Advisory Bulletin) suggests,
this document is only
Testing
Legally privileged/Confidential Information may be contained in this message.
If you are not the addressee(s) legally indicated in this message (or
responsible for delivery of the message to such
Was reviewing a number of power supply specifications and would like
to parallel a couple, but the leakage/touch current on them is in the 2 mA
range. Isn't most of the leakage current produced (produced might not be the
word I want) in the upfront filter caps - W and Y capacitors and
...right from UL's web site:
http://ulstandardsinfonet.ul.com/scopes/311101.html
-Original Message-
From: Veit, Andy [mailto:andy.v...@mts.com]
Sent: Wednesday, January 17, 2001 6:45 PM
To: emc-p...@majordomo.ieee.org
Subject: UL 3111-1 vs. UL 3101-1
Folks-
Can
Dave:
See http://contact.tm.agilent.com/tmo/datasheets/English/85024A.html,
300Khz to 3 GHz
Ed
Ed Price
ed.pr...@cubic.com
Electromagnetic Compatibility Lab
Cubic Defense Systems
San Diego, CA. USA
858-505-2780 (Voice)
858-505-1583 (Fax)
Military Avionics EMC Services Is Our Specialty
Andy,
The complete scope of all UL standards is available on the UL web site. Just
go to http://ulstandardsinfonet.ul.com/ and click on Scopes of all Current
UL Standards.
Kurt Andrews
Compliance Engineer
Tracewell Systems, Inc.
567 Enterprise Drive
Westerville, Ohio 43081
voice:
Copper applied to the outer PCB layers, in a pattern,
to even out the copper placement so the board is less
likely to warp through soldering. Obviously, it would
be put where there is not etch, large open areas, to
somewhat offset where you might have planes of
copper elsewhere on the
Please excuse my lack of knowledge..what is copper
thieving?
---
This message is from the IEEE EMC Society Product Safety
Technical Committee emc-pstc discussion list.
To cancel your subscription, send mail to:
-- Forwarded by Robert E. Heller/US-Corporate/3M/US on
01/18/2001 08:07 AM ---
Robert E. Heller
01/18/2001 08:08 AM
3M Product Safety, St. Paul, MN 55107
76-1-01
Dave,
Here are all the specs from the 2000 Agilent catalog. I'm including all of
them in case you end up needing more than just the frequency range.
Input Capacitance (at 500 MHz): 0.7 pF (nominal)
Input Resistance: 1 M? (nominal)
Bandwidth: 300 kHz to 3 GHz (usable to 100 kHz)
Gain (at 500
Gentleman,
I also use these standards and I agree with Andys statement. but you
need to be aware that there are US and Canadian deviations added to these
standards and as far as I recall, the US and Canada have the only deviations
to the 1010 standard.
Bob Chaplis
Genrad
Hi All,
As it was told to me,
IEC 1010 encompasses several product types, with particular requirements for
several others. When UL was in the process of adopting 1010, they were not
allowed, by ANSI, to eliminate the seperate standards (according to the
descriptions in the scope of 3111 and
Andy
I use these two standards on a daily bases and you are right, they are pretty
much identical. Yet to find a difference.
UL3101-1 Electrical Equipment for Laboratory Use - General Requirements
UL3111-1 Electrical Measuring and Test Equipment - General Requirements.
UL3111-1 is the UL
Can anybody identify with below ?
Brian
Tellabs
-Original Message-
From: richard Murphy richard.mur...@ie.flextronics.com
[SMTP:richard Murphy richard.mur...@ie.flextronics.com]
Sent: Tuesday, January 09, 2001 10:41 AM
To: McMahon, Nuala
Cc: richard Murphy
-Original Message-
From: Dave Wilson
Sent: Wednesday, January 17, 2001 11:59 AM
To: 'emc-p...@majordomo.ieee.org'
Subject: HP probe
Can anyone tell me the frequency range of the HP85024A? I've looked on the
Agilent web-site but can't find a reference to it.
Can anyone direct me to the EC rules which govern beta site installations?
For example, what if a contract is signed with the beta site, specifying
that the unit is not yet evaluated, and specifying terms of beta testing and
timeframe. Would that qualify as under the control of the
Can anyone tell me the frequency range of the HP85024A? I've looked on the
Agilent web-site but can't find a reference to it.
Thanks,
Dave Wilson
Alidian Networks Inc.
www.alidian.com
---
This message is from the IEEE EMC Society Product Safety
Our magnetics guru had the answer. The ground reference plane forms a mirror
image of the loop. Instead of the field increasing as the bottom conductor
is approached, the image forces the field to be uniform right down to the
plane. This is actually shown in Figures D7 and D8. Note that it is not
Paolo,
Actually, we did give a damn about you. If you just follow for a couple of
paragraphs, maybe you'll see how. One of the problems with small
pre-compliance chambers is that it is sometimes hard if not impossible to
fit the DUT and all of its associated cabling into the chamber. Also,
I received the following reply from the Greek Ministry when I asked the
question.
National authority responsible for spectrum management:
- Mr. Nissim Benmayor (head of the section)
(+30 1) 650 85 71
ymera...@hol.gr
(+30 1) 650 85 70 fax
***Mss. Irini Athanasiou (+30 1) 650 85 54
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