Don, and the group,
This is not so complex. As you surmise, parts of the house wiring are
being switched in and out by devices on it, and the broadcast RF present on
the wiring is being modulated by that switching.
While probing around the house with an untuned RF detector, I've found
power
Safety folks,
Assume testing according to IEC60065, which other tests / requirements will
be in addition for Canada (national requirements) ?
Best regards
Amund Westin, Oslo / Norway
I read in !emc-pstc that John Woodgate j...@jmwa.demon.co.uk wrote (in
hzkt6eaugh09e...@jmwa.demon.co.uk) about 'TC77b Rewrite of 61000-4-2
and 61000-4-4' on Wed, 13 Nov 2002:
Also, the boilerplate text for Normative References clauses has been
changed to:
QUOTE
The following normative documents
If the problem were emissions, the interference would be
very audible with the radio station off the air.
Just a rambling thought pattern ...
I'm not sure I necessarily agree with this. If the radio carrier
drops off, the front end stage and intermediate stages aren't
carrying an rf
They're usually VSWR tripped. I f you want one to operate with high vswr,
then you need a circulator or isolator to absorb the reverse power.
--
From: richwo...@tycoint.com
To: emc-p...@majordomo.ieee.org
Subject: Radiated immunity testing above 1 GHz
Date: Wed, Nov 13, 2002, 8:00 AM
Strongly suggest you consider using the IEC test from 1089, which is
supposed to be the primary environmental document anyway It's based on
IEC, simulators are readily available, and it's a realistic test with a lot
of precidence
Hope this is helpful,
Best Regards,
Mike Hopkins
Well,
In response to question 1, you may want to try for Class 1M. The new
measurement geometries allow many class 3B lasers to be reclassified as 1M.
I would assume (although I have no direct experience here) that the visible
spectrum lasers would also benefit from the new geometries (BTW,
In a message dated 11/13/2002 8:07:17 AM Central Standard Time,
gui...@cae.com writes:
I have an IFI (think it stands for Instruments For Industry) E-field probe,
purchased years ago. It still works fine. It comes with various probe tips
(antennas) tuned for low/high V/m, and it has its
I have an IFI (think it stands for Instruments For Industry) E-field probe,
purchased years ago. It still works fine. It comes with various probe tips
(antennas) tuned for low/high V/m, and it has its in-built attenuator.
It covers 25 to 500MHz and 1 to 100 V/m top of the scale; works on
I need to make a decision on an amplifier for radiated immunity testing in
the 1-2 GHz range. The choices appear to be a new solid state amplifier ( I
have not located a used one) or a used TWT amp. Is anyone using a TWT
amplifier for radiated immunity testing above 1 GHz? Do I need to be
HI Richard,
Running the risk of being commercial here... You know Schaffner maybe coming
out with their own probe?
Cheers,
Derek.
Mark,
Regarding question #1
Perhaps your question is based on the misconception that in Europe and
elsewhere we use IEC standards directly. This in fact is not the case. For
Europe we use ENs agreed by CENELEC and published by national standards
bodies, such as BSI. These ENs are frequently
I read in !emc-pstc that Ken Javor ken.ja...@emccompliance.com wrote
(in 0h5h004i9i0...@mtaout06.icomcast.net) about 'A Different Kind of
EMC Problem' on Tue, 12 Nov 2002:
I am going to guess that the three devices you list as culprits did not have
any requirement to meet a conducted emission
Wandel and Goltermann, and Narda both make field probes. I belive the WG
probes are fiber optically linked. The older Narda probes aren't and are not
suitable. I'm not sure what their latest products look like.
Luke Turnbull
richwo...@tycoint.com 11/12/02 05:11pm
I am seeking sources
Suggestion :
Wandel Goltermann
Regards,
Véronique
richwo...@tycoint.com wrote:
I am seeking sources for an E-field probe for radiated immunity testing
other than Holaday and Amplifier Research. Any suggestions?
Richard Woods
Sensormatic Electronics
Tyco International
Doug - we posted within a half-hour it seems. ;)
Actually the designers I worked-with liked the idea that the chips they
bought were tested, at least in some way, against the same standard the
end-product faced. I guess I would regard it as better than nothing
information.
Granted, it can
HI Eric and the group,
The main difference in the ESD test is in how the waveform is
specified. The waveform is not being changed, just a better
specification and calibration procedure for the simulator. Some ESD
simulators may need little or no change while others will need a
redesign.
Gary -- I just had the office email me a copy of the simulator description
from GR-78 and I'm amazed this is still in use. In the last few years, there
has been a lot of new data, and standards for ESD have evolved considerably
(BELLCORE GR 1089 is essentially the same as IEC 61000-4-2).
I read in !emc-pstc that don_borow...@selinc.com wrote (in OF685C23FA.C
efd2279-on88256c6f.006f0...@selinc.com) about 'A Different Kind of EMC
Problem' on Tue, 12 Nov 2002:
I have three devices in my house that cause problems with AM radio band
reception, but not due to emissions,
In each case,
I read in !emc-pstc that Gandler, Mark mgand...@ciena.com wrote (in
4fb204c0ca96d54aa7805b3715620bdd13b...@w2ksjexg02.oni.com) about
'Laser safety questions' on Tue, 12 Nov 2002:
According to the new revision of IEC 60825-1 (2001-08) , there are
following laser products classes: 1, 1M, 2, 2M ,
I read in !emc-pstc that Pettit, Ghery ghery.pet...@intel.com wrote
(in d9223eb959a5d511a98f00508b68c20c12515...@orsmsx108.jf.intel.com)
about 'TC77b Rewrite of 61000-4-2 and 61000-4-4' on Tue, 12 Nov 2002:
As a 3 year maintenance cycle was imposed on CISPR 24 in
September, there won't be any
I read in !emc-pstc that Luke Turnbull luke.turnb...@trw.com wrote (in
sdd0c5d9@mail2-shrluk.trw.com) about 'Directive 97/24/EC' on Tue,
12 Nov 2002:
Does anyone know where I might find a pdf version of this document. The text
is
public domain, but the version that is on the europa website
I read in !emc-pstc that Peter L. Tarver peter.tar...@sanmina-sci.com
wrote (in nebbkemlgllmjofmopleoehdebaa.peter.tar...@sanmina-sci.com)
about 'EN60950:2000 EN60950-1 last dates of manufacture' on Tue, 12
Nov 2002:
It would be a good thing (tm) if Subclause 4.5 of the Guide
to the
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