Dear all,
FYI to interested parties, Further on Chinese characters. China is using
simplifed Chinese characters, where Taiwan and Hong Kong use the traditional
Chinese characters. The grammer is the same, only the way of writing is
different.
Paul Chan
From: Spicer, Keith
Hello All
I'm still groping my way around the 7th edition of IEC65 (EN60065:2002) and
would appreciate a little help with creepage and clearances.
A designer wants to place a ground plane above a mains track on a pcb,
contained within a 230V rated domestic type product. As far as I can tell,
Hello All
I'm still groping my way around the 7th edition of IEC65 (EN60065:2002) and
would appreciate a little help with creepage and clearances.
A designer wants to place a ground plane above a mains track on a pcb,
contained within a 230V rated domestic type product. As far as I can tell,
This is a multi-part message in MIME format.
Bill,
An ADSL modem is telecom terminal equipment and must comply with the RTTE
Directive.
Harmonised standards to comply with:
Art 3.1a) Safety and health: EN60950(-1)
Art 3.1b) EMC: EN55022, EN55024, EN61000-3-2, EN61000-3-3
Art 3.2 Radio: only
If you were purchasing a brand new, fully CISPR compliant EMC receiver/SA,
and wanted to obtain the best value at the lowest cost, what would you
choose and why? Likewise, if you decided to purchase a used receiver/SA,
what would you choose and why?
Richard Woods
Sensormatic Electronics
Tyco
Richard Woods wrote: Gerald, please explain why a Notified Body number
is required? I thought that a harmonized ETSI standard exists.
A Notified Body number is not required unless a Notified Body (NB or
CAB) is consulted for the job. Since there are Harmonized standards that
can be used for this
My company has notified many products to all of the EU and EFTA member
countries based upon using a harmonized standard and a non-harmonized band
and we have never needed to add a Notified Body number to the form. Indeed,
in the beginning when we left that part blank, some countries asked for the
Out of curiosity, I wrote NARTE directly regarding the
below, to see what benefit they believe NARTE certification
would offer someone who already has experience in product
safety and a PE Registration. It's been a week and they
have not responded. Perhaps that's their answer.
Regards,
Peter
In a message dated 7/2/2003 7:47:13 AM Central Daylight Time,
richwo...@tycoint.com writes:
If you were purchasing a brand new, fully CISPR compliant EMC receiver/SA,
and wanted to obtain the best value at the lowest cost, what would you
choose and why? Likewise, if you decided to purchase a
Out of curiosity...are there ANY harmonized frequencies in Europe?
Is 13.56 MHz harmonized?
Bob Heller
3M EMC Laboratory, 76-1-01
St. Paul, MN 55107-1208
Tel: 651- 778-6336
Fax: 651-778-6252
This message is from the IEEE EMC Society Product Safety
Technical Committee emc-pstc
Brent -
60601-1-1 has a requirement for use of an equipotential
bonding terminal when the equipment is either Category AP
Equipment or Category APG Equipment. These equipment types
are related to flammable mixtures that are used for gaseous
anesthetics and the requirement is intended to reduce
Group,
I am trying to find a cross reference between Nema ratings for
enclosures and IP ratings for enclosures. I have looked at three different
cross references and come up with three different answers.
Thanks,
Jim Sotherden
Agency Coordinator/Test Engineer
GE Fanuc Automation
My understanding is that where there is a harmonised standard, but the
spectrum usage is not harmonised, then there is no need to involve a
Notified Body for any of the testing, but you do need a Spectrum Usage
Report from a Notified Body to ratify the intended usage of the device in
the target
I responded to the website below (which does not seem to be related to
NARTE) and also got no response. I do believe this is a HOAX.
From: owner-emc-p...@majordomo.ieee.org
[mailto:owner-emc-p...@majordomo.ieee.org]On Behalf Of Peter L. Tarver
Sent: Wednesday, 02 July, 2003 7:03 AM
To:
I understand that Class 1 products use harmonized bands. 13.56 MHz is not
harmonized. Sigh!
Richard Woods
Sensormatic Electronics
Tyco International
From: rehel...@mmm.com [mailto:rehel...@mmm.com]
Sent: Wednesday, July 02, 2003 10:05 AM
To: emc-p...@majordomo.ieee.org
Subject: RE: RTTE
Yes there are harmonized bands
E.g. cellular bands for GSM in the 900 and 1800 MHz range, some satellite
services.
These are bands were the different member states didn't had other radio
services before. For this reason this was easy to harmonize. But if some
member states had radio services in
Hi Peter:
Out of curiosity, I wrote NARTE directly regarding the
below, to see what benefit they believe NARTE certification
would offer someone who already has experience in product
safety and a PE Registration. It's been a week and they
have not responded. Perhaps that's
Hi Pete,
Funny you should mention that - It has been a year since this was decided and
getting info is like pulling teeth. I have yet to hear back from this latest
ad also.
Website was cool!!
Scott
- Original Message -
From: Peter L. Tarver mailto:peter.tar...@sanmina-sci.com
To:
Morning folks..
I find myself wrestling with PC emissions again. No names this time :-)
Above 500 MHz, I'm seeing a bunch of reasonably stable harmonics with about a
33 MHz spacing. Any thoughts as to what they may be from?
I've played with all the case openings etc, and also added a ferrite
Neil Helsby wrote
if I am to include a bought in power supply (or any other module) in my
system I need to have a good idea that when I test my system an EMC failure
due to the design and/or construction of the power supply does not cause me
grief.
This is a problem for everyone whose product
Ah, you have hit upon a problem that I see with the Directive. When the
spectrum is not harmonized and Notification is required, who is responsible
for ensuring that the equipment operates according to the spectrum usage
requirements of the Notified country. Is it the responsibility of the
Bob,
Go to the ERO website www.ero.dk and download ERC report 25. It's a big
help when determining frequency allocation/use in the EU.
Bill Stumpf
William M Stumpf
DLS Electronics
166 South Carter St.
Genoa City WI 53128
ph: 262-279-0210
fx: 262-279-3630
email: bstu...@dlsemc.com
From:
As you are probably aware, there are no exact equivalencies between IP
NEMA/UL Type ratings since they are based on different standards/tests. The
only standard that I am aware of that provides a general comparison guide
between the two is the 2003 version of NFPA 79 (Table F.5.5).
Sincerely,
In a message dated 7/2/2003, Chris Colgan writes:
A designer wants to place a ground plane above a mains track on a pcb,
contained within a 230V rated domestic type product. As far as I can tell,
1) The minimum thickness of the pcb material between the ground plane and
track should be
-Original Message-
From: richwo...@tycoint.com [ mailto:richwo...@tycoint.com]
Sent: Wednesday, July 02, 2003 5:43 AM
To: emc-p...@majordomo.ieee.org
Subject: CISPR Receiver/SA
If you were purchasing a brand new, fully CISPR compliant EMC
receiver/SA,
and wanted to obtain the
Hi Derek,
33 MHz is a standard clock frequency for PCI bus. Possible sources are;
motherboard bridge to PCI connectors; motherboard bridge to PCI IC devices on
the motherboard such as on board LAN, USB or audio; sometimes a PCI card will
have an onboard bridge that redistributes the PCI bus to
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Hi Joe,
You're correct that the CE Mark is not applied, but there are marking
requirements. The WEEE Directive requires that producers place a crossed-out
wheely bin symbol on their equipment (or packaging/user guide/warranty where
this is not feasible), signifying separate collection. Also, the
Greetings,
It is my understanding that the WEEE and RoHS Directives are not New
Approach Directives. What is the difference between New Approach
Directives and other directives such as WEEE/RoHS?
In order to declare conformity to New Approach Directives, the manufacturer
places the CE mark on
Hi All,
Would you like to measure risetimes of internal signals on an IC in a
package? Something like this is possible using E-field coupling.
Most of my articles on noise touch on magnetic field coupling, but
this month's Technical Tidbit presents a simple method of measuring
E-field coupled
Hello Group,
Does anybody have a clue where I could locate User Manual for following
WISTRON Model,
6669M (40GHz Signal Gen.)
Thanks in advance.
Harpreet Sidhu
This message is from the IEEE EMC Society Product Safety
Technical Committee emc-pstc discussion list.
Visit our web site at:
In a message dated 7/2/2003 3:03:29 PM Central Daylight Time,
bstu...@dlsemc.com writes:
Derek,
All power supplies are supposed to be tested with a representative system.
They are primarily designed to filter the supply emissions, since line filters
typically do little filtering above 20 or 25
Derek,
All power supplies are supposed to be tested with a representative system.
They are primarily designed to filter the supply emissions, since line filters
typically do little filtering above 20 or 25 MHz. Also remember the old
saying, CE plus CE does NOT equal CE!
Bill
William M Stumpf
DLS
Derek,
Most of the PS manufacturers I've dealt with use passive
dummy loads or quiet active loads. These very handy
quiet active loads provide programmable loading, BUT IN NO
WAY SIMULATE THE SUPPLY'S ACTUAL USE. In other words, how
many quiet loads do you power? Almost every load is a
micro
Hi All,
Thanks for the great replies!
looks like the PCI bus is the problem.. But here's the quandry..
Now we are adding the cards back in, they should add little to the profile,
correct? After all, they all have the CE mark on them, and some have the FCC
sticker too.
This is not happening,
It took a little searching, but I found a web page on UL's
site that has this comparison at:
http://www.ul.com/hazloc/ref/conversion.htm
which matches the NEMA250:1997, Table A-1 conversions. The
web page refers to NEMA 250, for additional details, and
NEMA 250 makes the same reverse
I to responded to the organization and have yet to hear back. However, mine
request was only a few days ago.
Bryan.
From: Scott Barrows
To: Peter L. Tarver; 'emc-pstc'
Sent: 7/2/03 11:38 AM
Subject: Re: NARTE safety engineer certification
Hi Pete,
Funny you should mention that - It has been
Hi Scott and all,
The web site is reputable and the organization is run by Greg Kervill who may
be on vacation / travel and not responding to the emails right now.
Whomever is interested in this program I suggest you contact Greg and/or NARTE.
Regards,
Kurt
From: Scott Barrows
Derek,
Harmonics with a 33 MHz spacing would suggest a 33 MHz clock signal, even
though these are very high order harmonics. The PCI (not fast PCI) bus has a
33 MHz clock.
Jim
James L. Knighten, Ph.D.
Teradata, a divsion of NCR
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