Alex,
It won't pass the UL (or CSA) overvoltage testing. You need the 600V part for
that.
Dan
From: owner-emc-p...@majordomo.ieee.org
[mailto:owner-emc-p...@majordomo.ieee.org]On Behalf Of Alex McNeil
Sent: Monday, December 01, 2003 6:00 AM
To: emc-p...@majordomo.ieee.org
Subject: US Modem
The Product Safety Engineering Society's web site has been updated with
some news items pertaining to the new society as well as a convenient
applet to log you into the IEEE Communities site to access EMC-PSTC
archives (use the EMC-PSTC Email Forum link in the sidebar). Visit the
PSES web site
Ned,
You are right, I could not find anything in recent ITE standards specifically
stating that hinges are not allowed. Older standards like UL1459 did
specifically state that bearings and hinges can not be used. I believe
however that the onus would be on the manufacturer to prove that the
All renewing IEEE members and those considering membership in the IEEE
who have an interest in Product Safety have a new society to consider,
the Product Safety Engineering Society (PSES). Visit the PSES web site
at www.ieee-pses.org.
This new Society includes the theory, design, development
Alex,
Assuming your talking about 60950 and the signal lines are SELV you only need
basic insulation, not reinforced, between TNV-3 and SELV. Distance through
insulation does not come into play, just the dielectric test and voltage
rating of the wire in this case.
Dan Roman
dan.ro...@ieee.org
Hello list,
Does anyone know if there is a difference between what some call J1 for
Japan and ISDN running on T1 lines (e.g. NTT ISDN) in Japan? Is J1 used to
refer to a non-ISDN line or T1 leased line? What's the typical J1
application? Are both covered by the Green Book? I looked around on
Doug,
You could attach a process tag that goes with the board and have the
inspectors and testers stamp that instead. I'm sure you could make your
manufacturing processes accommodate the change and still maintain
traceability. The product at the customer's site does not need the stamps
on the
Yes, with apparently only one user of this word on the face of the planet!
:-)
TLAs are bad enough, 10LAs I can't handle (guess that would be a TLA as
well).
Dan
-Original Message-
From: Rich Nute [mailto:ri...@sdd.hp.com]
Sent: Tuesday, November 05, 2002 12:44 PM
To:
All,
When Verizon installed my ADSL service a couple years back they put in what
they called a whole house filter, but it is actually a splitter/filter. I
don't recall any Listing marks of any kind on the device. It was installed
on the network side of the gray box on the side of my house, not
Brian,
I use a Hot Spot welder from DCC Corp. Works quite well and even comes
with green tinted safety glasses (as suggested by an earlier poster). Here
is a link to a description of it, I think they give company contact info as
well:
http://www.thomasregister.com/olc/dcc/hot2.htm
Dan
NEBS Gurus,
Do the 1089 bonding and grounding DC short circuit tests apply down to the
component level in a system or are they limited to the power supply or some
other demarcation point? If it applies anywhere in the system it seems to
me that you'd never finish testing. You'd have to test
I guess these sets are essentially computers with an RF input so why not
Class B? Throw in TiVo (sp?) and they're even have hard drives.
If the FCC wants to speed deployment have them force my cable company to
carry HDTV signals!
Dan
-Original Message-
From: Gary McInturff
I was looking into this a few weeks ago also and found similar results
experimentally as other posters have mentioned. The only voltage per inch
spec I was able to come up with was in the IPC specs but they were way out
of whack! 0.12 mils per volt or more meaning that 2121 Vdc distance that
George,
The ACTA for Part 68 has issued an advisory for Customer Information
documentation for Part 68 devices. It suggests a warning be included
suggesting the use of an AC surge arrestor. This is on page 7 of 8 of a PDF
file downloadable from http://www.part68.org/.
It claims that telephone
Thanks, makes sense, but they do not mention what CB stands for even once on
their web site, at least no place that I could find.
Dan
-Original Message-
From: geor...@lexmark.com [mailto:geor...@lexmark.com]
Sent: Tuesday, February 12, 2002 10:15 AM
To: Roman, Dan
Subject: RE: CE
My understanding also but here is one I've never figured out, what does CB
stand for in the CB Scheme of things?
Dan
-Original Message-
From: Alan E Hutley [mailto:nutwoo...@nutwood.eu.com]
Sent: Tuesday, February 12, 2002 3:37 AM
To: am...@westin-emission.no;
I agreed completely with Scott. A 6 to 9 foot 18AWG cord will handle well
in excess of 20A for a short period of time without starting to smoke (heck,
it'll handle close to in excess of 60A for a very very short time without
bursting into flames--not that it was a good experience finding this
If there aren't standards there probably should be. I remember seeing a
NOVA episode in which Dr. Harold Edgerton, inventor of the strobe,
demonstrated a strobe similar to that used during WWII to photograph German
positions from the air at night. He fired the strobe at a newspaper 3 feet
away
Brent,
You'd find a paper titled Constructing the Lagrangian of VLSI Devices from
Near Field Measurements of the Electric and Magnetic Fields on page 129 of
the IEEE 2000 Symposium record volume one very interesting. It lists some
results using just such a measuring device. A description I
In a past job (10 years ago) another compliance engineer and myself were
discussing how nice it would be to have EMI sunglasses while working on
fixing a particularly noisy and troublesome piece of equipment. The idea
was inspired by the X-ray glasses sold on the back cover of comic books.
Is that McDonald's below sea level? Just wondering how far over 212F/100C
they could get the water to go! Anything over around 150F is scalding isn't
it? Anything under 150F and coffee drinkers would complain the coffee is
cold. Let's sue the coffee producers for coming up with a product that
Peter,
Here is a link to the MSDS data sheet from the company I buy chemicals from.
They have numerous other data sheets but only for the chemicals they sell.
It lists synonyms for Kerosene which may help you locate other sources that
go by another name.
Capacitively. If your floating structure ends up being resonate at a
fundamental or one of the harmonics it will become a very effective
unintentional radiator.
Dan
-Original Message-
From: David Gelfand [mailto:gelf...@memotec.com]
Sent: Thursday, January 18, 2001 2:34 PM
To:
I make them ground it with appropriately spaced vias.
-Original Message-
From: Perry Qu [mailto:perry...@alcatel.com]
Sent: Thursday, January 18, 2001 4:19 PM
To: Roman, Dan
Cc: 'Stephen Phillips'; rehel...@mmm.com; emc-p...@majordomo.ieee.org;
DORIN OPREA
Subject: Re: Copper Thieving
Remember that you can also cause yourself all kinds of EMI headaches if you
have electrically floating copper areas or patterns on the board. It has
lead to many arguments with the CAD department over the years!
-- Dan
-Original Message-
From: Stephen Phillips
I use either epoxy or a cement made out of water glass and kaolin powder.
I have a thermocouple welder so I'm not too concerned about keeping them
intact while removing them.
--
Dan Roman, Compliance Engineer
Dialogic®, an Intel Company
1515 Rt. Ten, Parsippany, NJ 07054
Here's your chance to join Dialogic, an Intel subsidiary, in Parsippany New
Jersey. As the leader in open computer telephony (CT), Dialogic provides the
critical building blocks and technical services that enable customers to
develop solutions serving the converging Internet and
One thing not mentioned in all the posts on this subject is that if the
document was scanned and not captured then the text is really graphics and
would not be selectable as text. Thankfully most documents these days are
created directly from the source document into a PDF using PDF Writer which
I also have been following this thread with interest, but even more
practical and technically less challenging alternate methods of testing take
too long for acceptance in my opinion. Forget near-field measurements with
probes, I'd like to see quicker movement on acceptance of standards like
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