Some Ethernet history will explain the situation:
10BaseT Ethernet was designed to run on the same cable with telephone to
simplify connectivity to cubicles. Non-telco pins were selected for
Ethernet so RJ-45 jacks could accept either a telephone- or Ethernet plug.
This combination wiring
It's no different this side of the Pond.
--
From: John Woodgate j...@jmwa.demon.co.uk
To: emc-p...@majordomo.ieee.org
Subject: Re: EMC-related safety issues
Date: Wed, Jan 2, 2002, 3:19 PM
I read in !emc-pstc that Ken Javor ken.ja...@emccompliance.com wrote
(in
If they meant "radio compass," that is a different can of monkeys.
The radio compass was traditionally the indicator for the ADF set , pointing
to the ground station, and was usually mounted so as to revolve in front
of a scale which rotated with the aircraft's' magnetic heading. A noisy
Hi Ted,
Approval for ITE telecom equipment in Korea is issued by Radio Research
Laboratory (RRL), which is organized under Korea's Ministry of Information
and Communications (MIC).
Your memory's right: in-country testing will be required for EMC (emissions
and immunity) -- and for telecom
As already stated, the incident of the DC-10 has for years been used as an
example of personal electronics (laptops) interfering with avionics. The
only version I've ever heard (and the only one that makes sense) had to do
with interference to an ILS receiver operating somewhere between 108MHz and
My apologies if this is just too naive...
I am trying to explain to a collegue why there are so many cautions against
mixing water with electricity. He is not the type to accept common sense as
an answer. This is what I have reasoned so far...
MAL-OPERATION
Water is generally conductive. If
I totally agree with the sentiments expressed. My point was that IEE safety
guide seemed to give aid and comfort to those who feel otherwise and I think
this is a dangerous trend which needs to be opposed, not appeased.
--
From: Gary McInturff gary.mcintu...@worldwidepackets.com
To: Ken
Did the camera have proximal cause to the event that befell the child,
well not unless it fell of of the ceiling or the tripod fell over and hit the
infant, or the camera overheated and started a fire. Other than that the
Lawyers need to dig their heads out - juries as well. They are just
It appears that a lot depends on what we mean by the
word safety. If this means the elimination of
as-yet-unknown risks, why, nothing can be shown to
be safe. If we mean the prevention of hazards that
are reasonably predictable, we do that already. Or
should! The existence of standards which
Dear Ann Landers,
I've always had trouble with peripherals. Keyboards and mice that were
CE marked and looked like such good prospects have mostly turned out to
be fickle.
Well, I've been involved with a touchpad for about five months now.
When I first bought it, we were so happy. Whenever we
I read in !emc-pstc that richwo...@tycoint.com wrote (in 846BF526A205F8
4BA2B6045BBF7E9A6ABC4FD0@flbocexu05) about 'EN60529', on Wed, 2 Jan
2002:
It is referenced in
the OJ under the LVD, yet a reading of the standard indicates that it is a
basic standard intended to be referenced in product
I read in !emc-pstc that Cortland Richmond cortland.richm...@alcatel.co
m wrote (in 3c3365ca.d3acb...@alcatel.com) about 'EMC-related safety
issues', on Wed, 2 Jan 2002:
The citation for the referenced incident was Compliance
Engineering (CE magazine), the European edition, for
I read in !emc-pstc that Ken Javor ken.ja...@emccompliance.com wrote
(in 20020102192217.PBJZ20715.femail25.sdc1.sfba.home.com@[65.11.150.27]
) about 'EMC-related safety issues', on Wed, 2 Jan 2002:
What I have read on a paragraph by paragraph basis is fine, but I
find the overall
Hi all,
Happy New Year,
I just found out that we maybe shipping our product to Korea soon. I would
like to know the Korea EMC/Safety requirements for ITE equipment . I seem to
remember some requirement for in-country testing. Am I correct in this? What
if anything does this in-country testing
Personally, I could list a ton of stuff that would instill
fear and loathing amongst the fainest of EMC hearts.
Sitting in a jet airliner at the end of the runway readying
for take-off and watching the cabin lights dim slightly in
sync with the sweep of the main radar dish just a couple
of
Perhaps someone can clear up my confusion. EN60529 covers degrees of
protection (water, dust, etc.) provided by enclosures. It is referenced in
the OJ under the LVD, yet a reading of the standard indicates that it is a
basic standard intended to be referenced in product standards. However,
It is perhaps less than useful to depend on a third or fourth party report
of an incident to justify preventive measures. The mention in the
Guide, of an aircraft compass being changed ten degrees by a laptop computer,
is an example of a report which needs to be more completely reported. I
was
Hi Keith,
I do understand Ing. Gert Gremmen's comments, but still wonder how the
airplane compass I mentioned earlier was interfered with by the
passenger's laptop.
I really can't say about any specific airplanes compass but I can help try
to understand what can cause such an effect.
I have read a part of the IEE guide mentioned below. What I have read on a
paragraph by paragraph basis is fine, but I find the overall philosophy
deeply troubling. The tone of the document is that the manufacturer is
responsible for all uses or misuse of the equipment he sells in concert with
I read in !emc-pstc that cherryclo...@aol.com wrote (in
63.44c9e61.29648...@aol.com) about 'EMC-related safety issues', on
Wed, 2 Jan 2002:
Once again, John, you seem to be trying to give a negative impression
about
the IEE's guide on EMC and Functional Safety (which you now admit you
David:
The pertinent and defining specification is contained in the FCC Rules, 47
FR Part 68.
Everything else is a misuse of the original intent. An RJ11 is also defined
there. ALL
RJ designations are specified for use within the telephone industry. Is
is too bad that
the Networking groups
Just got back from Christmas vacation, but I'll wade in now...
There is nothing in CISPR 22 that refers to a 2 dB margin for compliance
when a single sample is tested. The only document I ever recall seeing that
requirement in is VDE 0871/6.78, paragraph 4.1.3.1. This document was
published in
Hi John and all,
I am currently writing a book about the subject of RF spectrum analysis,
which will be ready within the next 3 months. I started more than four
years ago, and now I have 322 pages and more than 250 drawings.
I cover the applications, theory and circuits used in five decades of
I believe there are great problems with the use of the phrase 'spurious
emissions' in any context save that of a standard or law which defines just
what that phrase means.
I sincerely hope I am not one of those who is ever ready to overstate the
importance of their station in life ! But I do
Once again, John, you seem to be trying to give a negative impression about
the IEE's guide on EMC and Functional Safety (which you now admit you haven't
read) instead of simply saying what it is that you think is wrong with it.
Of course I am passionate about the IEE guide - my colleagues and
I believe that your concept of spurious emission is independent of the
magnitude of the emission, and is only associated with the idea that the
emission is not an antenna-connected intentional rf link. So you
comfortably associate an rf welder and a laptop computer as both spurious
sources of rf
Hi,
The requirements for insulation between the Applied Part, F-type and the
Signal Input part is defined in clause 20.2, part B-d. You need Basic
insulation. The working voltage is at a minimum the rated supply voltage.
See clause 20.3, paragraph 6.
So, assuming 230 Vac input. The
I won't get into whether you were intending to impugn my truthfulness, and
shall assume you just used an unfortunate turn of phrase.
I had already said I was not aware of the previous communications on this
issue, so I could not have been aware that you were restricting the
discussion to the
We apply IEC950/EN60950/UL1950 to our anti-theft equipment.
Richard Woods
Sensormatic Electronics
Tyco International
-Original Message-
From: Constantin Bolintineanu [mailto:bolin...@dscltd.com]
Sent: Friday, December 21, 2001 2:01 PM
To: 'Oliver Su'; 'emc.p...@ieee.org'
Subject: RE:
Hi all,
Any people in this perfect discussion forum who have experience with the
USCG Type Approval programme for Fire Detection systems ?
Please take contact.
Best regards
Amund Westin, Oslo/Norway
---
This message is from the IEEE EMC Society Product
I read in !emc-pstc that Wan Juang Foo f...@np.edu.sg wrote (in
of9079e07a.37ec5220-on48256b35.0025a...@np.edu.sg) about 'Quasi-Peak
Measurements with Spectrum Analyzer WAS: Books about Spectrum Analyzer',
on Wed, 2 Jan 2002:
[big snip]
To all forum readers,
This got me interested and I am
Tim Foo
Thanks for your information.
There are not many books about SA, except by Engelson Morris and another one by
Mr. White. The Modern does have a good chapter about filter bandwidth for
different kinds of signal.
Best Regards
KC Chan
Wan Juang Foo f...@np.edu.sg 01/02/02 03:14pm
KC,
I suppose you have read CR Paul's section on this topic. I had a quick
filp through and the two books that you mention in the materials is indeed
aged. I recomend that you read Tim Williams's and Tihanyi's section on
this topic of detectors.
1.EMC for systems and installations / Tim
http://www.goreelectronics.com/products/cable_assemblies/micro_test.cfm
KC CHAN [PDD] wrote:
Hi all
I am looking for a K-type connector cable that is for measurement up to 26.5
GHz, any recommendation of the suppliers?
Try
Hi all
I am looking for a K-type connector cable that is for measurement up to 26.5
GHz, any recommendation of the suppliers?
By the way, does anyone know that if Horn antenna up to 40 GHz with SMA or
N-type connector available in the market? Such a high frequency range, I think
SMA or
Navigation aids are radios. They are designed to have these sensitivities.
The balance of the suite of avionics have their RE controlled to protect
these radios. It all works. If an on-board rfi source such as a portable
CD player or laptop interferes with the operation, this is not a
Tim Foo
Actually I am looking for something about the VBW setting and how it affects
the measurement. I got feedback from the group that the setting of the
Spectrum Analyzer (SA) shall be at linear mode instead of logarithmic mode, I
understand the explanation from the group, but I do find
KC,
I suppose you meant the other newer book:
Modern spectrum analyzer theory and applications / Morris Engelson.
Dedham, Mass. : Artech House, c1984.
My library have both copies, I can pop around the corner to take a look at
it. What kind of comments are you specifically looking for?
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