I just reviewed my copy of EN 61000-4-3 and can see where it replaces ENV
50140 but no mention of ENV 50204. What am I missing?
Dan Kinney
Horner APG
-Original Message-
From: Gert Gremmen [SMTP:cet...@cetest.nl]
Sent: Wednesday, September 06, 2000 1:54 PM
To: Helge Knudsen;
Are you sure you are reading that correctly. In the radiated portion in a
note to the side of the levels it says that the test level is prior to
modulation. I believe that is trying to say turn up the levels until 3 v/m
measured and once that is done then begin the modulation and start sweeping
Antonio,
The answer is that power is 180% greater (100% in the carrier, 40% in
the USB, and 40% in the LSB). Voltage (RMS) is the square root of 180%
(1.8) greater or 134% or 4.02 VRMS.
This value may not have much practical sense except as a rough
indicator of proper operation since
Hi Ken:
The standards specify the oil as being:
distillate fuel oil which is a medium volitile distillate having a mass
per
unit volume between 0.845 g/ml and 0.865 g/ml, a flash point between 43.5C
and 93.5C and an average calorific value of 38MJ/l.
I've found that this is
Mat,
For radio matters, contact the National Telecommunications Commission(NTC)
at: http://www.ntc.gov.ph/
Not sure if they also deal with EMI/EMC matters but I'm sure they will point
you in the right direction.
Best Regards,
~
Sam Wismer
RF Approvals Engineer
LXE, Inc.
Hello Group,
From EMC emissions point of view, any cable connected to any device
is prone to conducted emission problems. The is because grounding problems
in a PCB exist or enclosure currents flow between shielded connectors. This
leads to CM currents that will be measured.
The criterion for
Hello Helge, Richard and Group,
Any ENV is a temporary (pre) standard that immediately gets
withdrawn on the publication date of the replacement standard :
in this case the publication date of EN 61000-4-3.
It's existence is justified by the immediate need for a standard, where
no suitable
1.8 times or 5.4V/m
Ron Chernus
Antonio Cinquino cinqu...@cae.ca on 09/06/2000 08:33:47 AM
Please respond to Antonio Cinquino cinqu...@cae.ca
To: 'emc-p...@majordomo.ieee.org' emc-p...@majordomo.ieee.org
cc:(bcc: RON CHERNUS/LALAB)
Subject: Immunity Testing to EN55024
Hello
Hello Group,
Table 1 of EN55024 calls for a test specification of 3 V/m
(umodulated, r.m.s) radio-frequecny EM field for Immunity at the enclosure
port.
Does anyone know off-hand the value when the signal is 80% modulated
with an AM signal of 1kHz as called for in the same
I have been asked by one of our mechanical engineers to look into conducting
the Hot Flaming oil test of IEC60950 based standards (reference to Annex
A.5) Has anyone had experience with this test especially in conducting or
witnessing the test (first hand experience)?
The standards specify
Koh,
I agree with George, the ventilation openings must be blocked in order to
comply with the testing requirements of the standard, but there may be a way
to perform the test and not totally block the openings.
Depending on the orientation of the openings, you might be able to add some
Hi Richard and Group,
IEC/EN 61000-4-3/A1 is dealing with Radiated electromagnetic field from
digital radio telephones, but ENV 50204 is not withdrawn yet. I beleive this
will happen on dow for EN 61000-4-3/A1: 2001-05-01.
Regards
Helge Knudsen
EMC Engineer
Jyske EMC
Literbuen 16B
DK 2740
Mike,
I agree with you if there are surge arrestors to ground on the other lines.
But consider this common situation - a port with isolation transformers and
surge suppressors only between tip and ring pairs. The three lines surged have
high impedance to ground, so all 100A will pass
Pryor,
Unfortunately, I don't think the definition is in question. It specifically
states, that for the purposes of the standard, LANs are to be considered as
telecomms ports as per section 3.6. It probably would have been less ambiguous
if the standard defined Telecomms ports as Ports which
Universal Shielding Corp. 8 ft. x 8 ft. Model USC-44 in good condition with
power line filter and Instruction Manual including assembly instructions.
Construction is copper screen for the upper four feet of each side. Magnetic
attenuation is 40 dB at 15 kHz and electric field attenuation is
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