Hi All,
looking for a filter for a shield room. Needs to be 400 Hz capable, and good
for 230 Vac if possible. Anything above 30 Amps would be good.
Anyone have one lying about on the shelf?
Thanks,
Derek N. Walton
Owner, L F Research EMI Design and Test Facility
Poplar Grove,
IL 61065
Hi there,
can anyone tell me the difference between the two spectrum analysers?
Thanks,
Derek N. Walton
Owner, L F Research EMI Design and Test Facility
Poplar Grove,
IL 61065
In a message dated 11/23/2003 6:46:20 AM Central Standard Time,
richhug...@aol.com writes:
I would also advocate that it should be possible to obtain the complete scope
clause of standards from each standards body. Abstracts are all very well,
but they do not necessarily contain the fine
In a message dated 11/19/2003 3:12:16 PM Central Standard Time,
david.garn...@med.ge.com writes:
Hello,
Has anyone had any experiance with this receiver
that they would be willing to share with me (on or
off the listserve?) Interested, also if you are using
any other EMI control S/W package
-emc-p...@majordomo.ieee.org
[mailto:owner-emc-p...@majordomo.ieee.org]On Behalf Of POWELL, DOUG
Sent: Tuesday, November 11, 2003 2:49 PM
To: 'lfresea...@aol.com'
Cc: emc-p...@majordomo.ieee.org
Subject: RE: opinions, please
Derek,
Do you have a suggestion as to how the test should be performed
In a message dated 11/11/2003 12:05:00 PM Central Standard Time,
rehel...@mmm.com writes:
Is anyone (besides us) having any problems passing European Class B
radiated emissions on devices that use USB2 communications? Does anyone
know of a quiet USB2 laptop or PC? Any tips on isolating the noise
In a message dated 11/10/2003 2:34:28 PM Central Standard Time,
ralph.mcdiar...@xantrex.com writes:
Some have questioned whether 61000-3-2 is even an EMC standard!
Why would it not be.
In 25 years of working in EMC, I've seen EMC issues from DC to daylight...
Just because PC's are
In a message dated 11/11/2003 9:36:21 AM Central Standard Time,
john.radom...@modicon.com writes:
The EMC guidelines read: ... If the component is intended to be placed on
the market as a single commercial unit for distribution and/or final use
this function has to be available WITHOUT further
In a message dated 11/11/2003 3:51:21 AM Central Standard Time,
david.cole...@racalinst.co.uk writes:
My company designs and manufactures ATE systems and components for the
Military, Aerospace and Functional test markets. Often what we are supplying
is just an interface adapter (IA) that sits
In a message dated 10/22/2003 1:42:02 PM Central Daylight Time,
john_t...@bose.com writes:
I don't know what type of product you are trying to put a plan together for
but I would highly recommend you get a CB certification and report for the
products especially if you are planning to sell in the
In a message dated 10/17/2003 11:45:09 AM Central Daylight Time,
pat.law...@verizon.net writes:
Are you thinking about an immunity test to verify your products are
'robust', or a standard that describes ways to minimize ESD on the
bench?
I'm concerned about the hazards of making proto units.
Hi all,
I've been asked to advise on ESD standards to impose on a development lab, not
a manufacturing area. Are there such Standards?
Thanks,
Derek N. Walton
Owner, L F Research EMI Design and Test Facility
Poplar Grove,
IL 61065
In a message dated 10/9/2003 1:20:42 PM Central Daylight Time,
swis...@acstestlab.com writes:
I am getting the impression that if you do use this method that a
competent body should be involved especially since the entire band is
not being covered. Someone of some higher authority will have to
In a message dated 10/9/2003 9:48:19 AM Central Daylight Time,
swis...@acstestlab.com writes:
My question is, is this method allowed only for in-situ testing, or can it be
used when the EUT is so large that it cannot fit in the chamber?
Hi Sam,
I faced the same problem testing injection
In a message dated 10/3/2003 12:34:57 PM Central Daylight Time,
bstu...@dlsemc.com writes:
This points out one of the weaknesses of the self-declaration (DOC). The
responsible party can self declare for whatever standards they feel suite
their needs.
Hi Bill,
Not really, I have to disagree. I
Hi all,
while reviewing a clients competitors D of C, I was surprised to see that only
Immunity and Low voltage were address, there were no emissions requirements
called out.
The product is a professional arcade game. Is this product exempt? Any
thoughts why this could be allowed?
Cheers,
Hi all,
I'm looking into the best way to perform the magnetic field from equipment
test in DO-160. I'm currently using a compass, but has any one got a better
idea?
If I have to stick with a compass, has anyone go a preferred Vendor/model?
Thanks,
Derek N. Walton
Owner, L F Research EMI
Hi Kevin,
there is a version of Ethernet called Industrial Ethernet. One of the leaders
is Contemporary Controls. I've tested their hubs and they are very good...
Talk to George Karones His e-mail is:
gkaro...@ccontrols.com
Cheers,
Derek N. Walton
Owner, L F Research EMI Design and
In a message dated 9/22/2003 1:10:21 PM Central Daylight Time,
tdonne...@act-sys.com writes:
Group,
I have an application where I need to load an actuator, and monitor the
load, during EMI testing. I have to meet DO-160D, and MIL-STD-461E, which
will include 200 V/m Radiated Susceptibility.
Hi,
I'm looking for sources of flexible Ferrite sleeving. Can anyone help?
Thanks,
Derek Walton
In a message dated 9/9/2003 10:29:03 AM Central Daylight Time,
don_borow...@selinc.com writes:
When I think of a network analyzer, I think of a device that injects a
signal into a network, and then receives the signal after processing by the
network using a receiver tuned to the original
Hi folks,
I was wondering if anyone had looked into using a network analyser for
measuring current harmonics?
I have an analyser that will go down to 5 Hz, it seems a perfect instrument
for this.
Thoughts welcome.
Thanks,
Derek Walton.
Hi all,
As you may know, I support the Schaffner Complaince 3 software here in the
USA. I have a new driver written for a HP 8566B and QP adaptor, but I have no
instrument to test it on.
Is there anyone within 200 miles of Rockford IL that has one and would be
prepared to rent it for a few days.
Hi all,
well, I have found myself involved with an interesing problem. I'm testing an
aircraft system, that only has a few wires... 8 or so, that interface with the
outside world. 28 volt dc power, an programming loop, a manually operated
switch and an indicator.
Well, evey time the push
In a message dated 8/27/2003 6:55:38 PM Central Daylight Time,
gary_mcintu...@msn.com writes:
Just a small heads up John.
I don't have the specs on the instruments that you are discussing but one
of the many things that the NIST folks want to know about your site are the
qualifications of
Hi All,
I'm chatting with a client that manufacturers high end telescopes. Not usually
found in Walmart, Currys etc. but they may find their way into richer family
homes. These chaps are great for observing Mars at the moment!
We are trying to decide which EMC product standard may apply for
Hi folks,
I'm writing a software driver for the HP 8566/8 Spectrum analysers, and I have
the manuals for these two instruments. However, I now need to control the
Quasipeak Adapter and Preselector, but I don't have the manuals for these two.
Can anyone point me to them, ideally in .pdf. Failing
In a message dated 7/16/2003 8:27:47 AM Central Daylight Time,
rehel...@mmm.com writes:
Can someone point me in the direction of a company or information on
constructing a reverberation (mode-stirred) chamber. We would like to use
it as a precompliant diagnostic facility/resource. Any
Hi All,
recently I posted about my tribulations with a noisy motherboard.
I was testing with just the bare minimum of components, which included cards
in the slots. For grins I loaded up the PCI slots with cards, and the system
got quieter. Note, there were no cables, just the cards plugged in.
Morning folks,
At the risk of mentioning names... I was informed that Intel made a very quiet
Motherboard But I've gone and lost the darned e-mail with the details!
Can the person who told me this resend the e-mail?
Very sorry to everyone else,
Thanks,
Derek N. Walton
Owner L F Research
Hi all,
I've determined that the Motherboard I have, is very noisy. Does anyone have a
suggestions for a supplier that makes quiet Motherboards. Looking for a bog
standard 1GHz clock board.
Also, after testing several power supplies with a network analyser, I've
determined that they have almost
In a message dated 7/8/2003 4:57:55 PM Central Daylight Time,
croni...@hotmail.com writes:
Hi
I have a requirement to log the screens from a spectrum analyser over a period
of between one day and one week. I have been using the DDDA software from
Stanford research with some success.
In a message dated 7/7/2003 4:17:29 PM Central Daylight Time,
j...@jmwa.demon.co.uk writes:
I'm looking for a high power transorb ( NOT MOV ). Currently the
biggest I can find is 5kW. Can anyone point me to a higher power
device?
5 kW for how long? Isn't it the total energy that is
Hi all,
I'm looking for a high power transorb ( NOT MOV ). Currently the biggest I can
find is 5kW. Can anyone point me to a higher power device?
Thanks,
Derek N. Walton
Owner L F Research EMC Design and Test Facility
Poplar Grove,
Illinois, USA
www.lfresearch.com
In a message dated 7/7/2003 9:05:57 AM Central Daylight Time,
jim.bac...@paxar.com writes:
Charles, I have used three labs over the last two years. Every single one of
them maximized the cables. One of the labs was part of a large company, the
other two were smaller privately owned labs. In
In a message dated 7/2/2003 11:23:03 PM Central Daylight Time,
j...@jmwa.demon.co.uk writes:
Where did you get the idea that 'CE stops at 30 MHz'? The test for
*conducted emissions on the mains lead* goes up to 30 MHz. Emissions at
higher frequencies are controlled by the requirements for
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
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
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
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,
Hi All,
Can anyone point me to a source for HP equipment manuals, ideally, downloadable
Thanks,
Derek N. Walton
Owner L F Research EMC Design and Test Facility
Poplar Grove,
Illinois, USA
www.lfresearch.com
Hi Bob,
this is something that my lab does. We use network analyzers for NSA, and
Field uniformity from 26 MHz to 4 GHz if you need that.
While we are not A2LA accredited yet, we hope to be soon.
Sincerely,
Derek N. Walton
Owner L F Research EMC Design and Test Facility
Poplar Grove,
Illinois,
Hi All,
I'm looking at plotting the response of devices on a polar plot, either 2D or
3D. In this cases it's the response of a field probe. Several plots will be
used for different frequencies.
Does anyone have suggestions of what package to use? I know or Origin, but
it's very expensive.
In a message dated 5/14/2003 8:56:31 PM Central Daylight Time,
ed.pr...@cubic.com writes:
I wonder if these amplifiers might be adaptable to our conducted immunity
amplifier needs? Those McIntosh amplifiers are too expensive for me.
I use a QSC amp for the low end, it will really drive a
In a message dated 5/11/2003 4:38:57 PM Central Daylight Time, jde...@nas.com
writes:
Given a choice, I'd recommend buying a proper Haefely-Trench Generator
(absolutely the best gun on the market, in my opinion). Otherwise, visit your
local market and get a BBQ Lighter.
Hi Jim,
have
In a message dated 5/8/2003 8:53:56 PM Central Daylight Time,
ywle...@vtc.edu.hk writes:
Can anyone provide some information about I want to make a low cost ESD gun
for ESD test, the peak voltage about 4 or 8 k volt ( if it can induced + and -
poloarity will be more better), the waveform
Hi all,
at the IEEE symposium last year I sat through a presentation that showed
changes to the Part 15 limits. Can anyone point me to where I can get the
numbers? I've searched around the FCC site, but not been very successful.
Thanks,
Derek N. Walton
Owner L F Research EMC Design and Test
In a message dated 4/29/2003 9:01:17 AM Central Daylight Time,
pierre-marie.an...@intel.com writes:
You can visit : http://www.access.gpo.gov/nara/cfr/waisidx_01/47cfr15_01.html
Good luck
Pierre-Marie Andre
Senior Approval Engineer
Thanks,
but this is the old limits. The new
Hi folks,
I've been asked by a US manufacturer who's signature if any should appear on
the D of C, and should they be located on European soil.
Is there a clear consensus?
Thanks,
Derek N. Walton
Owner L F Research EMC Design and Test Facility
Poplar Grove,
Illinois, USA
www.lfresearch.com
Hi all,
Can anyone share with me what they are paying for radiated immunity testing.
80 MHz to 1 GHz, as well as 100 MHz to 18 GHz up to 200 v/m.
Please reply off line!!!
Thanks,
Derek.
In a message dated 4/1/2003 3:05:32 AM Central Standard Time,
alex.mcn...@ingenicofortronic.com writes:
As you said we do not want to continue this thread but as a final word I
feel I must state that I totally agree with your email.
So the problem continues to be unresolved?
I do not
In a message dated 3/27/2003 9:34:03 AM Central Standard Time,
peter.tar...@sanmina-sci.com writes:
While I can't speak for all OEM pc manufacturers or intend
to contradict your personal experience
My personal experience has only had me visit 2 OEM's Both were exceptional.
You don't
In a message dated 3/28/03 10:05:02 AM Central Standard Time,
rsto...@lucent.com writes:
what do you do to the company that passes site A
oats,then fails site B...go to site C?...best 2 out of 3?
HI Richard..
As an assessor, we have been taking great steps to get this problem down to
In a message dated 3/27/2003 8:34:58 AM Central Standard Time,
rsto...@lucent.com writes:
Mark mentioned reports,
a paper trail...or is it?
Vendors doing the EMC/EMI ?,
who might a vendor be for say IBM or Dell?
would think the mfr'r would have an associate
there during testing like most of
Hi all,
This e-mail has been prompted because of a number of things that have all come
together. This may take a little reading, but please stick with it.
Last note... this is not intended to pick on any individuals, or organization,
but I do want to stir the pot.
I operate an engineering lab,
In a message dated 3/25/2003 4:11:56 PM Central Standard Time,
drcuthb...@micron.com writes:
most interesting data. I have two questions: What software are you exercising
the PC's with and is the spread spectrum enabled? I assume you are using an
RBW of 120 kHz and using Quasi-peak detection.
Hi Alex,
talk to Sensormatic, the are in Florida, but great folks to deal with.
Don Umbdenstock would be the chap.
djumbdenst...@tycoint.com
They have a remarkable camera that can sit in the roof and zoom quite hi.
While I was at his lab, I didn't see it respond to fields up to 10 v/m. The
In a message dated 3/25/2003 8:49:04 PM Central Standard Time,
cgrassospri...@earthlink.net writes:
So the next obvious question is: Are the majority of
the PC failures clones??
So far, from what I've seen... no.
Derek.
In a message dated 3/25/2003 8:28:40 PM Central Standard Time,
cgrassospri...@earthlink.net writes:
Question to Derek: Do the PCs have the infamous
assembled from FCC compliant components
label??
The clones do, the others do not.
Little more news.. 2 laptops, an older Micron, 350 MHz,
In a message dated 3/25/2003 5:10:12 PM Central Standard Time,
randall.flind...@emulex.com writes:
I am sure you also addressed this but since I have 2 cents to add...
A front-end overload condition on the receiver/analyzer, or an overload at
the pre-amplifier, can cause errors in
In a message dated 3/25/2003 7:27:32 PM Central Standard Time,
ken.ja...@emccompliance.com writes:
What bands were the outages in?
Sorry Ken... got to stop you here.
When I assess, I do so to the standard. The FCC make the rules, we either
comply or we don't. No need to second guess the
In a message dated 3/25/2003 4:31:09 PM Central Standard Time,
drcuthb...@micron.com writes:
Derrick,
I'm sure you used the antenna factors correctly but I'll put in my 2 cents
worth anyway. Were the AF's used correctly? You need the TX AF and the RX AF.
If the receive antenna factor was used
In a message dated 2/6/2003 4:10:16 PM Central Standard Time, emcp...@aol.com
writes:
Also, does anyone recommend where to buy these ferrite tubes?
Hi Tim,
Schaffner makes these. Call John Parnell on 1-800-367-5566 He's on Ext 225 ( I
think )
I'm sure there are others...
Cheers,
Derek
In a message dated 1/28/03 6:32:49 PM Central Standard Time,
drcuthb...@micron.com writes:
A1 to EN55022:1998 requires the use of ferrite clamps on all cables leaving
the table-top EUT for a connection outside the test site. Are there any
other manufacturers of these clamps other than Fischer
In a message dated 1/23/2003 3:37:38 PM Central Standard Time,
shbe...@rockwellcollins.com writes:
Now that DO-160D, change 3 is published, does anyone have suggestions for
test labs that can perform mulitple burst multiple stroke lightning? I
believe that TUV in Minn, MN and Lightning
In a message dated 1/15/03 12:30:26 PM Central Standard Time,
smcen...@ustech-lab.com writes:
We are in the process of purchasing video cameras for monitoring EMC Immunity
testing up to 10V/M. Pricing for cameras designed to withstand 20V/M is way
high
do any of you successfully
66 matches
Mail list logo
