The last time I had a spam attack it was the middle of the night. It
was quickly solved with a frying pan, butter, two slices of bread and
some mustard :-)
From: owner-emc-p...@listserv.ieee.org
[mailto:owner-emc-p...@listserv.ieee.org] On Behalf Of Rich Nute
Sent: Thursday, May 19, 2005
is interested in finding a lab in that area, let
me know off list and I’ll forward you the list of responses that I get.
Hopefully, that will keep the groups’ collective email inboxes unclogged.
Thanks,
Chris Maxwell
Design Engineer
Nettest
chris.maxw...@nettest.com
In article 39f7060a00b5e946b516261c077441c02ea...@utexch1w.gnnettest.co
m, Chris Maxwell chris.maxw...@nettest.com writes
No, I meant monel. I put the question mark after it because I knew
that it was available as a shielding material; but unsure of its
permeability. According to Laird
, if you need some serious shielding, you'll probably need to
look at a wire mesh window insert. If you need some serious magnetic
field shielding, then try to find a wire mesh window insert with a high
permeability.
Of course, these are just my own opinions.
Chris Maxwell
Nettest
This message
.
Chris Maxwell | Design Engineer - Instruments Group
email chris.maxw...@nettest.com | dir +1 315 266 5128 | fax +1 315 797 8024
NetTest | 6 Rhoads Drive, Utica, NY 13502 | USA
web www.nettest.com | tel +1 315 797 4449 |
-Original Message-
From: owner-emc-p...@majordomo.ieee.org
applied these guidelines to European compliance as well.
Chris Maxwell | Design Engineer - Instruments Group
email chris.maxw...@nettest.com | dir +1 315 266 5128 | fax +1 315 797 8024
NetTest | 6 Rhoads Drive, Utica, NY 13502 | USA
web www.nettest.com | tel +1 315 797 4449 |
-Original
I have a sample of a flexible ferrite material from a company called Tokin.
It is not a sleeving; but it is a thin (about .040) sheet, flexible enough to
be rolled into a tubular shape. Personally, I haven't found an application
for this stuff.
Chris Maxwell | Design Engineer - Instruments
that the subassemblies could be hipot tested, then the main
assembly could have a low voltage hipot just to check for the ubiquitous
dropped screw?
Chris Maxwell | Design Engineer - Instruments Group
email chris.maxw...@nettest.com | dir +1 315 266 5128 | fax +1 315 797 8024
NetTest | 6 Rhoads
and then reinstalled
after hipot.
So...are there any alternative test or inspection methods that can be used on
this product?
Thanks in advance,
Chris Maxwell | Design Engineer - Instruments Group
email chris.maxw...@nettest.com | dir +1 315 266 5128 | fax +1 315 797 8024
NetTest | 6 Rhoads Drive, Utica
Intuitively, I would think that any measures taken to de-synchronize the
switching of the power supplies would also improve conducted emissions.
-Original Message-
From: Pat Lawler [SMTP:pat.law...@verizon.net]
Sent: Wednesday, July 30, 2003 10:31 AM
To: EMC-PSTC
Subject:
And they said that there wasn't any application for the technology in an
Etch-a-Sketch.
Hopefully, the computer has figured out how to go diagonally. I always had
trouble with that.
Chris Maxwell | Design Engineer - Optical Division
email chris.maxw...@nettest.com | dir +1 315 266 5128 | fax
Thank you everyone for your replies.
I attached one below for anybody else who may be interested.
I'm all set. Again, I thank all of you for your help.
Chris Maxwell | Design Engineer - Optical Division
email chris.maxw...@nettest.com | dir +1 315 266 5128 | fax +1 315 797 8024
NetTest | 6
familiar with these?
Thanks,
Chris Maxwell | Design Engineer - Optical Division
email chris.maxw...@nettest.com | dir +1 315 266 5128 | fax +1 315 797 8024
NetTest | 6 Rhoads Drive, Utica, NY 13502 | USA
web www.nettest.com | tel +1 315 797 4449 |
This message is from the IEEE EMC Society
to this standard. I'm just
trying to get an idea of what kind of testing would be involved.
adTHANKSvance
Chris Maxwell | Design Engineer - Optical Division
email chris.maxw...@nettest.com | dir +1 315 266 5128 | fax +1 315 797 8024
NetTest | 6 Rhoads Drive, Utica, NY 13502 | USA
web www.nettest.com
I won't argue with that. I'm still glad that I asked for clarification. Very
informative.
-Original Message-
From: Mike Hopkins [SMTP:michael.hopk...@thermo.com]
Sent: Tuesday, June 24, 2003 12:18 PM
To: Chris Maxwell; Mike Hopkins; don_borow...@selinc.com;
emc-p
standpoint, that ESD testing would be a
good thing to do.
One point that I'm sure of agreement/disagreement is indirect ESD testing. I
think that, regardless of how you treat the surfaces; this product still needs
indirect ESD testing. Do you agree with this?
Best regards,
Chris Maxwell | Design
in a locked, grounded, metal cabinet,
2.5m from the floor; then that's a different story! That doesn't sound like
the case (no pun intended).
Chris Maxwell | Design Engineer - Optical Division
email chris.maxw...@nettest.com | dir +1 315 266 5128 | fax +1 315 797 8024
NetTest | 6 Rhoads Drive
the GBICs would be if we
tried to re-label them and sell them under a Nettest part number, which we
don't.
Does anybody see a hole in this reasoning?
Thanks,
Chris Maxwell | Design Engineer - Optical Division
email chris.maxw...@nettest.com | dir +1 315 266 5128 | fax +1 315 797 8024
NetTest
of the equipment attached to it from its
battery.
If the surge suppressor were after the UPS; then blowing a fuse or tripping
the surge suppressor would prevent the UPS from powering its outputs.
Chris Maxwell | Design Engineer - Optical Division
email chris.maxw...@nettest.com | dir +1 315 266
To me, this whole thread begs the question: Why not put the surge supressor
in front of the UPS?
Chris Maxwell | Design Engineer - Optical Division
email chris.maxw...@nettest.com | dir +1 315 266 5128 | fax +1 315 797 8024
NetTest | 6 Rhoads Drive, Utica, NY 13502 | USA
web www.nettest.com
. We radiate heat through our skin, not our clothes. Dark skin
radiates better, hence the dark coloring of people with African ancestry.
I hope that I've helped you.
Chris Maxwell | Design Engineer - Optical Division
email chris.maxw...@nettest.com | dir +1 315 266 5128 | fax +1 315 797 8024
that it's working.
Chris Maxwell | Design Engineer - Optical Division
email chris.maxw...@nettest.com | dir +1 315 266 5128 | fax +1 315 797 8024
NetTest | 6 Rhoads Drive, Utica, NY 13502 | USA
web www.nettest.com | tel +1 315 797 4449 |
-Original Message-
From: Pommerenke, David
to Chassis.
Is there a Y rated TVS, MOV, Sidactor... out there?
I'm tempted to try some 4700pF Y caps that I have around to see if they'll
soak up the surge a little bit.
Chris Maxwell | Design Engineer - Optical Division
email chris.maxw...@nettest.com | dir +1 315 266 5128 | fax +1 315 797 8024
From a previous message
Could I say we meet Criteria A, but in a few frequencies we meet criteria
B, call for more details.
[Chris Maxwell]
I'm wondering if the average user would understand Criterion A or
Criterion B.
Why not use a statement something
Yes, wouldn't it be good. IMHO, it's slightly less feasible than a
combined 3D photocopier and perpetual motion machine.
Someday, they'll be invented too. Although I don't want to be the guy that
has to test the perpetual motion machine :-)
Chris Maxwell | Design Engineer - Optical Division
scrapes by the EMC standards so my company can
ship, I can collect a paycheck and my kids can have their soccer cleats and
two boxes of corn flakes next week :-)
Chris Maxwell | Design Engineer - Optical Division
email chris.maxw...@nettest.com | dir +1 315 266 5128 | fax +1 315 797 8024
NetTest
from 48VDC
3. An AC powered, stand-alone unit.
Anybody have any suggestions? I was half hoping that someone in the group
worked for a company that made such an animal.
Thanks in advance for any leads you may be able to provide.
Chris Maxwell | Design Engineer - Optical Division
email chris.maxw
the 0.016 distance between an SELV
and hazardous trace on the same internal layer. Can anybody see a problem
with that?
Thanks in advance for any assistance.
Chris Maxwell | Design Engineer - Optical Division
email chris.maxw...@nettest.com | dir +1 315 266 5128 | fax +1 315 797 8024
NetTest | 6 Rhoads
Amp fuses installed. Can anybody see a compliance
problem with this (considering EN 61010-1).?
Thanks for your collective time.
Chris Maxwell | Design Engineer - Optical Division
email chris.maxw...@nettest.com | dir +1 315 266 5128 | fax +1 315 797 8024
NetTest | 6 Rhoads Drive, Utica, NY
-medical-expert bystander; but I hope
it helps.
Chris Maxwell | Design Engineer - Optical Division
email chris.maxw...@nettest.com | dir +1 315 266 5128 | fax +1 315 797 8024
NetTest | 6 Rhoads Drive, Utica, NY 13502 | USA
web www.nettest.com | tel +1 315 797 4449 |
-Original Message
Homologation Services
San Jose, CA
peter.tar...@sanmina-sci.com
-Original Message-
From: Chris Maxwell
Sent: Tuesday, February 04, 2003 5:32 AM
Exactly!
Chris Maxwell
-Original Message-
From: drcuthbert [SMTP:drcuthb...@micron.com]
Sent: Monday
the fusing
characteristics (I^2)(t) slightly different as well.
Chris Maxwell | Design Engineer - Optical Division
email chris.maxw...@nettest.com | dir +1 315 266 5128 | fax +1 315 797 8024
NetTest | 6 Rhoads Drive, Utica, NY 13502 | USA
web www.nettest.com | tel +1 315 797 4449 |
-Original
. It
seems to me, (just an opinion now) that a Earth ground system made to handle
the worst case current of your worst case power input cable (along with some
design margin) would stand a good chance of passing any regulatory test.
Can any of the gurus see a problem with this?
Chris Maxwell | Design
and buys ferrites ala carte, remember; I'm not on
any CISPR commitees; I'm just throwing out a little bit of Math and some
assumptions and suggesting that this could be done.
Chris Maxwell | Design Engineer - Optical Division
email chris.maxw...@nettest.com | dir +1 315 266 5128 | fax +1 315 797
like alot to some; but it
adds up after a few cables. Besides; we went to college to learn all of that
math; why not use some of it? I don't mind paying for stuff that I can't
make; but this one seems possible to me.
Chris Maxwell | Design Engineer - Optical Division
email chris.maxw
with fruit salad.
Chris Maxwell | Design Engineer - Optical Division
email chris.maxw...@nettest.com | dir +1 315 266 5128 | fax +1 315 797 8024
NetTest | 6 Rhoads Drive, Utica, NY 13502 | USA
web www.nettest.com | tel +1 315 797 4449 |
This message is from the IEEE EMC Society Product Safety
Dave,
What you say is absolutely true (see attached message)
From Halliday and Resnick's Fundamentals of Physics, a decibel is
referenced to 1 picoWatt/square meter. Since I had used this book for three
semesters of physics; I always assumed it was the Bible.
Alas, it is just another
For sound, the worst case would be to add 3dB for each shelf. However, in
the real world, the noise probably won't all add together (there will be
power/phase/frequency differences).
SNIP
Chris Maxwell | Design Engineer - Optical Division
email chris.maxw...@nettest.com | dir +1 315 266 5128
for each shelf. However, in the
real world, the noise probably won't all add together (there will be
power/phase/frequency differences).
I saw Paul Hare's response which said to add 13dB for 20 chassis. That
sounds about right to me ;-)
Chris Maxwell | Design Engineer - Optical Division
email
-1
for products is more appropriate.
However, don't let me steer you off course if I've made a bad assumption.
Regards
Chris Maxwell | Design Engineer - Optical Division
email chris.maxw...@nettest.com | dir +1 315 266 5128 | fax +1 315 797 8024
NetTest | 6 Rhoads Drive, Utica, NY 13502
-
From: Juhasz, John (IndSys, GE Interlogix) [SMTP:john.juh...@ge.com]
Sent: Friday, January 10, 2003 2:07 PM
To: drcuthbert; Chris Maxwell; emc-p...@majordomo.ieee.org
Subject: RE: Fiber optic cable testing per EN 55022:1998 ?
While there are VERY good points here, I believe
forgot, a line
cord would be helpful.
I just want to make sure that we test for the fully configured worst case.
You can never be too careful you know.
Chris Maxwell | Design Engineer - Optical Division
email chris.maxw...@nettest.com | dir +1 315 266 5128 | fax +1 315 797 8024
NetTest | 6
,
storage safety, ease of update, coherence of storage and just about any other
category that I can think of.The only time paper wins out over electronic
is during a power outage.
Chris Maxwell | Design Engineer - Optical Division
email chris.maxw...@nettest.com | dir +1 315 266 5128 | fax +1 315
. This
allowed me to create a snapshot of the test sample, as tested by only creating
the list of assembly numbers and revisions. So, I'll only charge 0.5M. Come
on! It's a bargain :-)
Chris Maxwell | Design Engineer - Optical Division
email chris.maxw...@nettest.com | dir +1 315 266 5128 | fax +1 315 797
opinions and interpretations. I haven't had to
tell them to a judge (does CENELEC have a judge?); but I believe that the
reasoning is sound.
Chris Maxwell | Design Engineer - Optical Division
email chris.maxw...@nettest.com | dir +1 315 266 5128 | fax +1 315 797 8024
NetTest | 6 Rhoads Drive
tested the port with
a one meter dummy cable and no traffic. However, at least they were good
enough to show me their complete test report so that I could at least replicate
what they did.
Chris Maxwell | Design Engineer - Optical Division
email chris.maxw...@nettest.com | dir +1 315 266 5128
with the specific aspects of your
product.
If there was no directive or standard to apply; then putting on a CE mark would
simply be for show and give a false sense of security.
Chris Maxwell | Design Engineer - Optical Division
email chris.maxw...@nettest.com | dir +1 315 266 5128 | fax +1 315
make sure
that it works.
Chris Maxwell | Design Engineer - Optical Division
email chris.maxw...@nettest.com | dir +1 315 266 5128 | fax +1 315 797 8024
NetTest | 6 Rhoads Drive, Utica, NY 13502 | USA
web www.nettest.com | tel +1 315 797 4449 |
Chris Maxwell | Design Engineer - Optical Division
The windscreen? Isn't that right behind the bonnet?
Chris
-Original Message-
From: Ken Javor [SMTP:ken.ja...@emccompliance.com]
Sent: Thursday, October 24, 2002 10:48 AM
To: lisa_cef...@mksinst.com; emc-p...@majordomo.ieee.org
Subject: Re: Definition ?
Screen is the
Filtered D-subs can be purchased from Conec, Spectrum Control and Amphenol
(maybe not any more).
A rubber insert with filter caps can be purchased from Metatech.
Chris Maxwell | Design Engineer - Optical Division
email chris.maxw...@nettest.com | dir +1 315 266 5128 | fax +1 315 797 8024
and no transients; and if you know that your inputs
can withstand 30mV of ripple and no transients; then you could claim due
diligence and not test.
If the power supply manufacturer didn't test to Criterion A with detailed
record keeping; then how could you trust the overall system without testing?
Chris
Laird Technologies (formerly Instrument Specialties) has a part number 97-720
or 97-721 that may fit the jellyfish description that John gives below.
From: John Woodgate [SMTP:j...@jmwa.demon.co.uk]
Sent: Thursday, October 10, 2002 4:10 AM
To: emc-p...@majordomo.ieee.org
Subject: Re:
lines.
Chris Maxwell | Design Engineer - Optical Division
email chris.maxw...@nettest.com | dir +1 315 266 5128 | fax +1 315 797 8024
NetTest | 6 Rhoads Drive, Utica, NY 13502 | USA
web www.nettest.com | tel +1 315 797 4449 |
-Original Message-
From: Brench, Colin [SMTP:colin.bre
.
Chris Maxwell | Design Engineer - Optical Division
email chris.maxw...@nettest.com | dir +1 315 266 5128 | fax +1 315 797 8024
NetTest | 6 Rhoads Drive, Utica, NY 13502 | USA
web www.nettest.com | tel +1 315 797 4449 |
-Original Message-
From: Jim Bacher [SMTP:jim.bac
; Darnell Group has the information for a small fee :-)
Chris Maxwell | Design Engineer - Optical Division
email chris.maxw...@nettest.com | dir +1 315 266 5128 | fax +1 315 797 8024
NetTest | 6 Rhoads Drive, Utica, NY 13502 | USA
web www.nettest.com | tel +1 315 797 4449
Some low profile AC-DC manufacturers:
Martek
Vicor
Lambda
Pico
None of them are cheap; but if you want low profile, PCB mount, high
reliability; then these are some viable suppliers.
Chris Maxwell | Design Engineer - Optical Division
email chris.maxw...@nettest.com | dir +1 315 266 5128 | fax
.
Chris Maxwell | Design Engineer - Optical Division
email chris.maxw...@nettest.com | dir +1 315 266 5128 | fax +1 315 797 8024
NetTest | 6 Rhoads Drive, Utica, NY 13502 | USA
web www.nettest.com | tel +1 315 797 4449 |
A friend is a person who knows the song in your heart because they stopped
Rich,
Have you tried relativity...perhaps accelerating your load to nearly the speed
of light would dilate time enough to make the period of your 1Ghz generator
seem much shorter :-)
Maybe a laugh will jar a few brain cells and help someone find you a real
solution
Best regards,
Chris
; then the nuetral/Earth connection in your isolation transformer may
not simulate the real world. This is due to the fact that many 220/230/240VAC
circuits do not have a nuetral bonded to ground.
Chris Maxwell | Design Engineer - Optical Division
email chris.maxw...@nettest.com | dir +1 315 266 5128 | fax +1
them divide the saved thickness among the other layers in order to
even things out a bit.
Can anyone see any pinholes in my reasoning? Can anyone recall the thread
regarding multiple layers of thin insulation?
Chris Maxwell | Design Engineer - Optical Division
email chris.maxw...@nettest.com
high (something like
14 Ohms/Square Inch). It has been about 6 years since I have dealt with them;
but the catalog that I have has a phone number of 44-1476-590600 listed for
Europe.
Chris Maxwell | Design Engineer - Optical Division
email chris.maxw...@nettest.com | dir +1 315 266 5128 | fax
at a circuit that needs 8mm of
creepage on a surface layer (.314). Would I be safe in allowing 0.8mm
(0.0314) of distance on an inner layer?
Anybody have any thoughts on this one.
Chris Maxwell | Design Engineer - Optical Division
email chris.maxw...@nettest.com | dir +1 315 266 5128 | fax +1 315
.
Thanks,
Chris Maxwell | Design Engineer - Optical Division
email chris.maxw...@nettest.com | dir +1 315 266 5128 | fax +1 315 797 8024
NetTest | 6 Rhoads Drive, Utica, NY 13502 | USA
web www.nettest.com | tel +1 315 797 4449 |
---
This message is from
nm, 1310nm, 1550nm, 1625nm), you may
be able to use power meters from NetTest (the company I work for), Fotec, Exfo,
Agilent, Corning, Wilcom, Acterna...take your pick.
Thanks
Chris Maxwell | Design Engineer - Optical Division
email chris.maxw...@nettest.com | dir +1 315 266 5128 | fax +1 315
Chuck,
Your email brought up a point that I hadn't considered: i.e. variability of ESR
causing unequal division of ripple current, thus overloading one capacitor.
I can see the reasoning for using the equalizing resistors (ensuring that the
ripple currents balance across the paralleled
piece of knowledge
out there that would help us tell the difference?
Chris Maxwell | Design Engineer - Optical Division
email chris.maxw...@nettest.com | dir +1 315 266 5128 | fax +1 315 797 8024
NetTest | 6 Rhoads Drive, Utica, NY 13502 | USA
web www.nettest.com | tel +1 315 797 4449
.
Thanks,
Chris Maxwell | Design Engineer - Optical Division
email chris.maxw...@nettest.com | dir +1 315 266 5128 | fax +1 315 797 8024
NetTest | 6 Rhoads Drive, Utica, NY 13502 | USA
web www.nettest.com | tel +1 315 797 4449 |
---
This message is from
on the standards knowledge that they have combined with the
product knowledge that you have.
Chris Maxwell | Design Engineer - Optical Division
email chris.maxw...@nettest.com | dir +1 315 266 5128 | fax +1 315 797 8024
NetTest | 6 Rhoads Drive, Utica, NY 13502 | USA
web www.nettest.com | tel +1 315 797
Jeffery,
Check out standard EN 60825-2.
EN 60825-1 deals with the products (transmitters) themselves. EN 60825-2 deals
with their integration into a Fiber Optic system.
Chris Maxwell | Design Engineer - Optical Division
email chris.maxw...@nettest.com | dir +1 315 266 5128 | fax +1 315 797
Wiseman [SMTP:jwise...@printronix.com]
Sent: Wednesday, June 19, 2002 6:27 PM
To: Chris Maxwell; John Juhasz; Davis, Mike; Emc-Pstc (E-mail)
Subject: RE: Two Questions concerning the subject of Laser Safety
Chris,
As I recall Laser Notice 50 does not exempt you from the record
the technical aspects (laser
classification, labeling...) of the CDRH requirements. This greatly simplifies
the technical aspects of laser compliance. It also means that your copy of EN
60825 will help you with foreign and US laser safety compliance.
Chris Maxwell | Design Engineer - Optical Division
Kazimier,
I tried the website in your reply below and got You are not authorized to view
this site.
Is there some kind of login method that must be used?
Chris Maxwell | Design Engineer - Optical Division
email chris.maxw...@nettest.com | dir +1 315 266 5128 | fax +1 315 797 8024
NetTest
that
you bring up an important point that engineers need to focus on proper ESD
design as well as ESD testing.
So, I consider your message to be worthwhile; even while I consider the
criticism in its first sentence to be off target.
Chris Maxwell | Design Engineer - Optical Division
email chris.maxw
that are not repeatable with 8KV air
discharge. So it is worth the time to test at lower levels until you get up
to the compliance level that you are shooting for.
Chris Maxwell | Design Engineer - Optical Division
email chris.maxw...@nettest.com | dir +1 315 266 5128 | fax +1 315 797 8024
NetTest
metals. We have the
A version from 1972. Perhaps there is a newer one.
Chris
-Original Message-
From: Chris Maxwell
Sent: Friday, June 07, 2002 10:11 AM
To: duncan.ho...@snellwilcox.com; emc-p...@majordomo.ieee.org
Subject: RE: Electrochemical potentials
Duncan
. I have used it
before; but, I don't have it here in front of me. I believe that it is
available on the web from astimage.daps.dla.mil/quicksearch/
Best regards,
Chris Maxwell | Design Engineer - Optical Division
email chris.maxw...@nettest.com | dir +1 315 266 5128 | fax +1 315 797 8024
Hi Susan,
Your response makes it much clearer. Sorry about the Ferrites 101 in my
previous response. Hope I didn't insult your intelligence.
Now that I see the true nature of your question, I only have one tidbit to
offer from experience.
In one telecom circuit we had (starting from the
; but such rambliness typifies my
thoughts on this subject; hence my appeal to the group for some insight. Any
thoughts are appreciated.
Chris Maxwell | Design Engineer - Optical Division
email chris.maxw...@nettest.com | dir +1 315 266 5128 | fax +1 315 797 8024
NetTest | 6 Rhoads Drive, Utica, NY
Susan,
I was just recently looking up ferrites for a different application and have
stumbled over a few manufactures not included in other responses.
AEM: www.aem-usa.com
Murata:
Top Magnetics: www.topmagnetics.com
WorldProducts: www.worldproducts.com
Ferrishield
Ferrite itself has both
and other gory details if you want to contact me offline.
Hope this helps.
Chris Maxwell | Design Engineer - Optical Division
email chris.maxw...@nettest.com | dir +1 315 266 5128 | fax +1 315 797 8024
NetTest | 6 Rhoads Drive, Utica, NY 13502 | USA
web www.nettest.com | tel +1 315 797 4449
Robert,
Perhaps your take on the situation is indeed on target. I'm not sure myself if
I would use the formula in the situation that you describe.
The original poster stated that he was trying to determine the change
of
temperature in a connector, caused by increased
formula that
you apply.
To twist an old proverb: Believe half of what you see, none of what your hear
and about 10% of the formulae that can be reproduced by an ASCII email :-)
Chris Maxwell | Design Engineer - Optical Division
email chris.maxw...@nettest.com | dir +1 315 266 5128 | fax +1 315 797
just listen to George Jones... or
something else that is slow enough to keep he speed safe :-)
Chris Maxwell | Design Engineer - Optical Division
email chris.maxw...@nettest.com | dir +1 315 266 5128 | fax +1 315 797 8024
NetTest | 6 Rhoads Drive, Utica, NY 13502 | USA
web www.nettest.com | tel +1
keeps us all
employed :-)
Chris Maxwell | Design Engineer - Optical Division
email chris.maxw...@nettest.com | dir +1 315 266 5128 | fax +1 315 797
8024
NetTest | 6 Rhoads Drive, Utica, NY 13502 | USA
web www.nettest.com | tel +1 315 797 4449 |
-Original Message-
From: Gordon,Ian
field.
Could that be what the standard is safeguarding against? Any medical
device gurus care to comment?
Chris Maxwell | Design Engineer - Optical Division
email chris.maxw...@nettest.com | dir +1 315 266 5128 | fax +1 315 797
8024
NetTest | 6 Rhoads Drive, Utica, NY 13502 | USA
web
amendments to EN 61326-1 that would
add signal line conducted emissions? If so, is there any expectation of
when the amendment is due to be processed?
Thanks,
Chris Maxwell | Design Engineer - Optical Division
email chris.maxw...@nettest.com | dir +1 315 266 5128 | fax +1 315 797
8024
NetTest | 6 Rhoads
of the Raychem parts are available from
Digi-Key (www.digikey.com).
Chris Maxwell | Design Engineer - Optical Division
email chris.maxw...@nettest.com | dir +1 315 266 5128 | fax +1 315 797
8024
NetTest | 6 Rhoads Drive, Utica, NY 13502 | USA
web www.nettest.com | tel +1 315 797 4449
driving device would make
our Ethernet link seem more robust during the test. What do you mean by
a lxia box?
Chris
-Original Message-
From: Gary McInturff [SMTP:gary.mcintu...@worldwidepackets.com]
Sent: Friday, April 19, 2002 1:18 PM
To: Pommerenke, David; Chris Maxwell; emc-p
in general or to the Ethernet
protocol in general.
Best regards,
Chris Maxwell | Design Engineer - Optical Division
email chris.maxw...@nettest.com | dir +1 315 266 5128 | fax +1 315 797
8024
NetTest | 6 Rhoads Drive, Utica, NY 13502 | USA
web www.nettest.com | tel +1 315 797 4449
to the area immediately around the
processor. If you can keep the harmonics within a small area, perhaps
they won't radiate very effectively andmaybe your product can live
for another few months.
Here's hoping that you find a solution.
Chris Maxwell | Design Engineer - Optical Division
email
are dealing with lower frequency AC such as 60Hz,
1Khz... I have already seen some replies that provide some decent
guidance on how to perform this measurement.
Best Regards
Chris Maxwell | Design Engineer - Optical Division
email chris.maxw...@nettest.com | dir +1 315 266 5128 | fax +1 315
Well,
What's legal?
What's smart?
What gets by unnoticed?
What is practical?
What's legal:
If a product is Class 1 (needs Earth Ground) then legally it needs to
have its ground conductor plugged in. That's regardless of if it's the
US, UK, U(anywhere).I say legally in the sense that you
electrodes is much less than the breakdown distance between two
round balls.
A great reference for intuitively sketching field lines around
conductors can be found on pages 53-55 of Fields and Waves in
Communication Electronics, second edition by Ramo, Whinnery and Van
Duzer.
Chris Maxwell | Design
I believe that OSHA enforces the CDRH laser safety guidelines in the
workplace. I'm not sure about consumer goods...Possibly the Consumer
Product Safety Commission?
Penalties for non-compliance would be the typical fines, recalls ...
handed out by OSHA or CPSC.
-Original Message-
]
Sent: Friday, March 01, 2002 5:19 PM
To: emc-p...@majordomo.ieee.org
Subject: Re: Pencil erasers for pre-EMI cleaning? (cleaning
mating surfaces, chassis, )
I read in !emc-pstc that Chris Maxwell chris.maxw...@nettest.com
wrote
(in 83d652574e7af740873674f9fc12dbaaf7d...@utexh1w2
If you're worried about galvanic corrosion. An excellent (and free)
source of information is the Instrument Specialties Catalog and Design
Guide.The back cover is a foldout which has a very nice color coded
chart that shows metal compatibility while taking into account the
environment.
to you guys out there. John already suffered
so that others may learn :-)
Chris Maxwell | Design Engineer - Optical Division
email chris.maxw...@nettest.com | dir +1 315 266 5128 | fax +1 315 797
8024
NetTest | 6 Rhoads Drive, Utica, NY 13502 | USA
web www.nettest.com | tel +1 315 797 4449
at www.rfi.co.uk which had a technical document explaining
this directive.
Hope this helps.
Best regards.
Chris Maxwell | Design Engineer - Optical Division
email chris.maxw...@nettest.com | dir +1 315 266 5128 | fax +1 315 797
8024
NetTest | 6 Rhoads Drive, Utica, NY 13502 | USA
web
. They were designed before the EMC directive came to
be. So, they fail ESD, EFT, Surge... miserably.When in doubt, I
hook one of them up. If it fails, then I at least have some confidence
in my test equipment.
Hey mon, got to get to work.
Chris Maxwell | Design Engineer - Optical Division
as well.
There may be some other variations that I can't remember. Anyone care
to blow a few minutes on a Friday afternoon to explain which symbol
means what?
Thanks,
Chris Maxwell | Design Engineer - Optical Division
email chris.maxw...@nettest.com | dir +1 315 266 5128 | fax +1 315 797
8024
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