What are the unique testing requirements for a power-line based LAN (i.e. the
information is transported on the powerlines within a home as an example) for
CE
mark? Would the power line harmonics be an issue? ANy unique set-up besides a
couple
of devices exchanging info?
Hans Mellberg
While on the topic of cameras, does anyone make a fiberoptic version of a
surveilance camera?
--- richwo...@tycoint.com wrote:
We enclosed our camera in screen mesh, but we had to verify that the
enclosure did not affect the calibration of the room. We test up to 10V/m
with no problems.
For a 2.4GHz SRD, I believe that this is now harmonized. Are individual country
notifications still required?
Thanks in advance
Hans Mellberg
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As a matter of fact the local SCV EMC society paper next week is about EM
radiation
from fiber optics. No, not from the glass or plastic itself!, but from the
metalized
reflector coating and also from the proximity of the Tx diode next to the
connector.
Actually measurable radiation!
--- John
No, 230V are not available in three phase. The 220/230/240V ARE derived from
three
phase voltages which are normally 380V or 415V and will converge somewhere
around
400V per phase.
--- rehel...@mmm.com wrote:
What three-phase voltages are commonly available in Europe? Is 230 VAC
three-phase
Aren't we already using symbols not in 417 such as the Hazard Warning
(exclamation
in a triangle) which is an international(except US) road hazard sign?
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National Instruments and others offer GPIB to F.O. adapters.
--- Luke Turnbull luke.turnb...@trw.com wrote:
Group,
Does anyone know where I can buy filtered bulkhead connectors for running
GPIB
cables through screened room walls. Approximate cost?
Alternatively, does anyone know
on his second book.
=
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Hans Mellberg
Regulatory Compliance EMC Design Services Consultant
By the Pacific Coast next to Silicon Valley,
Santa Cruz, CA, USA
408-507-9694
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Regrettably and out of respect for National events, the annual Social Event and
Festivities are hereby cancelled.
Our sincere condolences to those with affected families.
The Technical presentation program will resume as usual on the second Tuesday of
October.
Regards
Hans Mellberg
Chair
,
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Hans Mellberg
Regulatory Compliance EMC Design Services Consultant
By the Pacific Coast next to Silicon Valley,
Santa Cruz, CA, USA
408-507-9694
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Does anyone have the text of article 27.4 of IEC 61558-1? That is the only
portion I
beed. Its a transformer standard and about a hot filament test?
Thanks in advance
=
Best Regards
Hans Mellberg
Regulatory Compliance EMC Design Services Consultant
By the Pacific Coast next to Silicon
nature then there will be minimal
attenuation.
If the source resembles an electric field antenna (less likely at lower
frequencies)
then the usual shielding formulae may apply since they are primarily based on
E-fields to some extent and you will have attenuation.
=
Best Regards
Hans
Fellow listers;
If you are aware of a laboratory(ies) in the SF Bay Area that can perform safety
testing on transformers, please email me off-list with contact info.
An urgent situation warrants a quick turn-around.
Thanks in advance
=
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Hans Mellberg
Regulatory Compliance EMC
efficiency of the adopting staff. The benefits
seem
endless.
Bravo to a piece well written albeit some references of cities on the wrong
coast.
Best Regards
Hans Mellberg
Electromagnetic Compatibility Systems Design Consultant
In Beautiful Santa Cruz, California,
United States of America
dirty survey.
Granted we can only hit where engineers feel like making measurements,
when they do, but it would be interesting...
Daren A. Nerad
EMC Engineer
=
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Hans Mellberg
Regulatory Compliance Consultant
and Design Services
By the Pacific Coast next to Silicon Valley
Regards
Hans Mellberg
Regulatory Compliance Consultant
and Design Services
By the Pacific Coast next to Silicon Valley
Santa Cruz, CA, USA
408-507-9694
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Toy Directive is my guess!!!
Hans
--- David Gelfand gelf...@memotec.com wrote:
What directive covers this?
http://www.elderly.com/vintage/items/images/40U/40U-2712_headstock-back.jpg
David
---
This message is from the IEEE EMC Society
SCV EMC Society Meeting
Emerging standards for Europe
Tuesday, February 13, 2001
The February meeting of the Santa Clara Valley EMC Society will be held at SGI
in Mountain View, 1600 Amphitheatre Pkwy., building 40, in the Presentation
Center above the lobby.
The social gathering will start at
Tuesday 7:30pm, January 9th, 2001
at SGI, Mountain View, CA
(snacks and refreshments from 5:30pm)
The Basic Physics of Electromagnetics Without Abstract Mathematics
by:Scott Bennett (retired)
Please visit our website for details:
http://www.scvemc.org
At 01:40 PM 1/2/01 -0700, Kenneth McCormick wrote:
Thanks guys...BUT, I am not trying to convince UL that I am correct. This
is all internal to the company I am working with.
There are at least four chemical compositions that qualify for the term
petroleum spirits You can find their
. It is not usually referred
to as
by the order of; It simply is the first, second, third etc harmonic of the
fundamental. A harmonic frequency does NOT imply a multiplier of, but one that
sympathetically resonates with the fundamental.
=
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Hans Mellberg
Regulatory Compliance EMC
a
stinger)
Split phase (three or four wire)
Y (four and five wire)
Hope this stirrs the pot
=
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Hans Mellberg
Regulatory Compliance EMC Design Services Consultant
By the Pacific Coast next to Silicon Valley,
Santa Cruz, CA, USA
408-507-9694
our website for details:
www.scvemc.org
Hans Mellberg
Chair,
Santa Clara Valley Chapter of IEEE's EMC Society
=
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Hans Mellberg
Regulatory Compliance EMC Design Services Consultant
By the Pacific Coast next to Silicon Valley,
Santa Cruz, CA, USA
408-507-9694
on browse and then emc-pstc mailing list
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Hans Mellberg
Regulatory Compliance EMC Design Services Consultant
By the Pacific Coast next to Silicon Valley,
Santa Cruz, CA, USA
office:831-454-9450, cell:408-507-9694, fax:831-454-0755
areas of the polymer to coins of different voltages. While separating
two charged surfaces from each other, the voltage rises significantly
since the capacitance is being reduced and the conservation of charge
must be preserved which is the basis for tribolectric voltage
generation.
Hope that helps
Hans
A certain German sports car using a certain German fuel injection
system could be made to malfunction in an amuzing way (not to the
sports car operator though!) such as backfire, sputter, smoke, flames
from exhaust pipe, etc., by tractor-trailer operators with their CB
lin-amps when keying on and
The settop CATV and cable-modem I worked on a couple of years ago both
had tuners. Our client in Europe insisted on the EN50013 and ..20 as
they clearly met the requirements.
That was two years ago.
Hans
---Tommy le...@khgw.info.samsung.co.kr wrote:
Hellow Group.
I confuse the standard of
it would help to know where it is located
At 08:28 AM 12/21/00 -0800, Jim Bacher wrote:
I (not my employer) have a 8ft x 8ft x 9ft, copper screen room that I need
to get rid of. If you know of a University who would like to have one,
have them contact me. They are welcome to have it for
The HP application notes are pretty handy for that such as
95-1 S-parameter Techniques
154 S-parameter Design
and there are a lot more specific to network analyzers
They also have tutorials:
http://www.tm.agilent.com/classes/ProdSearch?md=brview=Tutorialsletter=al
Free food and soft-drinks will be available till theyre gone, starting at
5:30pm!
Everyone interested in the topis is invited to attend.
This month's meeting of the Santa Clara Valley Chapter of the IEEE EMC Society
is presenting:
Richard Nute, who will give us a presentation on
:
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For help, send mail to the list administrators:
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For policy questions, send mail to:
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Hans
For sale;
1) Single phase 15A LISN, 9kHz-80MHz
2) Tilt antenna tower base for square mast
3) Antenna holder trolley with air piston for h and v polarization for square
shaft mast.
4) Velonex V-3300 EFT and Burst generator.
Contact me off-list for more details.
I have been using Diala-X by Shell which was the
replacement for PCB dielectric oil. It has an MSDS.
=
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Hans Mellberg
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Could someone please give me the url of the archives
of this list? I used to have it but it got deleted a
while back. Thanks in advance
=
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Hans Mellberg
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based
semiconductors. If your product is specified at a
maximum ambient of 40C as most are, then you must
allow for the thermal rise above that. It may very
well have to be labeled and/or deemed inaccessible to
operator (meaning more labels, tool access etc.)
=
Best Regards
Hans Mellberg
EMC
frequency performance begins to deteriorate.
That particular type of coax is corugated and uses
closed cell dielectric material to minimize
hygroscopic affinity.
Another vendor of low loss coax cables is a German
manufacturer Rosenberger
=
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Hans Mellberg
EMC Consultant
(on a part-time basis) at
SFSU.
=
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Hans Mellberg
EMC Consultant
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.
--- Doug dmck...@gte.net wrote:
Perhaps it's because I've never understood ...
How exactly does one do ambient cancellation at an
OATS?
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Hans Mellberg
EMC Consultant
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University.
Bertram holds a Ph.D. in Engineering, as well as an MS
and BS in Mathematics, Chemistry and Computer Science,
and has published several textbooks, a multitude of
scientific research papers and has 2 patents pending.
=
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Hans Mellberg
EMC Consultant
at the Silicon
Graphics Café Iris, Building 5, on 2025 Stierlin
Court in Mountain View, CA.
For additional information and directions visit our
website:
www.scvemc.org
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Hans Mellberg
EMC Consultant
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The meeting is open to everyone and is free of charge.
Some food and drinks are offered for purchase prior to
the meeting.
visit our website for driving directions.
www.scvemc.org
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Hans Mellberg
EMC Consultant
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to the Electronics Packaging
Handbook, 1999 (CRC/IEEE Press).
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Hans Mellberg
EMC Consultant
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This message is coming from the emc-pstc
speaking of garbled use of units, How many buy
hardrives in bits? everyone I hear says bytes as in
a 10 megabyte HD. They even abbreviate is as 10 MB
when it should be called a 10 Megabit drive (10 Mb)
with little b as big B is for Byte.
=
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Hans Mellberg
EMC Consultant
suppressors) and power strip in the last
few years.
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Hans Mellberg
EMC Consultant
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Does anyone recall when the first hot-swap disk drive
was used? I recall something in the early 80's for
govt and industry by some company named phase-four? or
something like that.
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Hans Mellberg
EMC Consultant
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For those of you that missed the presentation by Dr.
Richard Wheeler and/or requested copies of his
presentation on Simultaneous Switching Noise in the
z-direction.. can view the paper on his website:
www.wheeler.com
=
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Hans Mellberg
EMC Consultant
.
-Bipolar and CMOS circuit, process and equipment
design.
-High-speed networking: physical layer and OS
interface.
-Authored 14 patents and a technical paper.
-Ph.D. in E.E. and Solid State Physics. He can be
located at: http://www.wheeler.com
=
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Hans Mellberg
EMC Consultant
There is somewhere a HP app note on how to perform CISPR average
measurements (by calculating the VBW vs frequency). It was written for
the 8566/8568 analyzers Its about 15 yrs old but someone on this list
should have it. I lost mine and I don't recall the exact title. What I
do, is to use a VBW
TEC in Mountain View is now producing a 1-6 GHz pre-amp for EMC
applications. SMA or N. Call John Fisher Jr. for details at 800-TEC-DOES
===
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Hans Mellberg
EMC Consultant
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--- Benoit Nadeau bnad...@matrox.com wrote:
Bonjour de Montreal,
In another life, I was working for a EMC Test lab
and we always used the
step by step procedure which was in the ESD
Standard. We tested using this
procedure for years and we did encounter some
products who failed at low
The most knowledgeable person on 40-200+ GHz is Mr. Chuck Oleson
(408-778-0491) of OLM Inc. in Morgan Hill CA. I suggest you contact him
for informed answers.
===
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Hans Mellberg
EMC Consultant
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Thank you Ron Pickard;
I find the Reference to EMC Books compilation extremely usefull and I
would like to seek your permission to publish it in our local chapter's
monthly publication, Spectral Lines serving the SF Bay Area IEEE EMC
community.
Best Regards
Hans Mellberg
Treasurer, Vice-Chair
the opportunity to work in your cutoffs,
and showing up to a
meeting with the suits dressed like this is always
good for a laugh!
Gary
snip
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EMC Consultant
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and Scott:
I agree that the fundamental is the First Harmonic.
Now, to muddy things up some more, how does all this
discussion square with calling the fundamental Fo?
;-)
Ed
snip
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Hans Mellberg
EMC Consultant
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,
generally our sources are
square- or modified-square waves.
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EMC Consultant
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conditions, the charge may not
even built up enough to create any effects.
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Hans Mellberg
Regulatory Compliance EMC Design Services Consultant
By the Pacific Coast next to Silicon Valley,
Santa Cruz, CA, USA
office:831-454-9450, cell:408-507-9694, fax:831-454-0755
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I am designing a PCI card that requires the use of several on-board dc-dc
converters
for 24V, 48V and a varialble V. Any suggestions to sources are greatly
appreciated,
Thanks in advance
=
Best Regards
Hans Mellberg
Regulatory Compliance EMC Design Services Consultant
By the Pacific
Maxwell, but can't be sure.
=
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Hans Mellberg
Regulatory Compliance EMC Design Services Consultant
By the Pacific Coast next to Silicon Valley,
Santa Cruz, CA, USA
office:831-454-9450, cell:408-507-9694, fax:831-454-0755
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Flexible circuit boards have been used in standard and hi-rel circuits
successfully
for at least two decades or more!
--- Brodie Pedersen brod...@nonin.com wrote:
I have a design team looking at using a bendable circuit board in order
for a certain fit in a plastic housing. Do any of you
But if you analyze the grammatical construction of :
and he or his authorised representative established within the Community
That can be interpreted as follows:
he is established within the community and in that absense, his authorized
representative is established within the community.
Question,
Can 2.4GHz wireless phones be marketed in EU as SRD? Is there a chart or
document
similar to FCC's part 2.106? for frequency allocations in EU?
Thanks in advance
=
Best Regards
Hans T. Mellberg, Consultant
Regulatory, High Speed, EMC and Power Design Services
By the Pacific
Meeting Notice:
The SCV IEEE/EMC and the Product Safety Society
present:
An Overview of Recent Developments in Nanotechnology.
Time: 5:30 Social, 7:00 Presentation
Place: Applied Materials Building 27,
3135 Kifer Road, Santa Clara CA.
All Welcome, No entrance fee, IEEE membership not
Does anyone know anything about this proposed standard? any weblinks?
Thanks in advance
Hans Mellberg
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Jim Bacher: j.bac...@ieee.org
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Regulatory Compliance EMC Design Services
What, if any, requirements does Vietnam have for EMC, Safety and telco for
DSL/E1/T1
type of products?
Thanks in advance
=
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Hans Mellberg
Regulatory Compliance EMC Design Services Consultant
By the Pacific Coast next to Silicon Valley,
Santa Cruz, CA, USA
408-507-9694
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Hans Mellberg
Regulatory Compliance EMC Design Services Consultant
By the Pacific Coast next to Silicon Valley,
Santa Cruz
MEETING LOCATION...
Meeting Place: Applied Materials Building 27,
3135 Kifer Road, Santa Clara, CA 5:30-8:00pm
=
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Hans Mellberg
Regulatory Compliance EMC Design Services Consultant
By the Pacific Coast next to Silicon Valley,
Santa Cruz, CA, USA
office:831-454
. Irving
Project Electrical Engineer
Lutron Electronics, Co. Inc.
+1 (610) 282 - 6468
+1 (610) 282 - 7324 [Fax]
=
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Hans Mellberg
Regulatory Compliance EMC Design Services Consultant
By the Pacific Coast next to Silicon Valley,
Santa Cruz, CA, USA
office:831-454-9450, cell:408
As I no longer will be doing testing from my house and will be using third party
labs instead, I will no longer have a need for these instruments and
components. If
interested, please view the list at:
www.members.aol.com/hmellberg/Instruments_for_sale.txt
=
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Hans Mellberg
often have to test beyond the limits if
your
clientel is to remain satisfied!
=
Best Regards
Hans Mellberg
Regulatory Compliance EMC Design Services Consultant
By the Pacific Coast next to Silicon Valley,
Santa Cruz, CA, USA
office:831-454-9450, cell:408-507-9694, fax:831-454-0755
always thought that money was power. Maybe you meant 63 dB$.
Ed
=
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Hans Mellberg
Regulatory Compliance EMC Design Services Consultant
By the Pacific Coast next to Silicon Valley,
Santa Cruz, CA, USA
office:831-454-9450, cell:408-507-9694, fax:831-454-0755
Milliard (F/Nrw/Dan.) or miljard (Sw.) stands for Billion.
--- Ken Javor ken.ja...@emccompliance.com wrote:
Excellent point. Don't the Brits refer to 1,000,000,000 as a milliard, or
is that continental usage only?
--
=
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Hans Mellberg
Regulatory Compliance EMC
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Hans Mellberg
Regulatory Compliance EMC Design Services Consultant
By the Pacific Coast next to Silicon Valley,
Santa Cruz, CA, USA
408-507-9694
and then emc-pstc mailing list
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Hans Mellberg
Regulatory Compliance EMC Design Services Consultant
By the Pacific Coast next to Silicon Valley,
Santa Cruz, CA, USA
408-507-9694
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