Hi Tony,
I was in the same position last year. Dell Dimension 500 MHz was
recommended to me. I bought mine refurbished and ended up with a faster
motherboard. I ordered two of them which was a good thing because the
shield was bad on one of the keyboards. For a monitor I used a NEC MultiSync
Tony,
When we had to test a 100MHz video two board system, weaknesses in grounding
structures of the PC's became extremely evident. Two stood out as the best
(best internal motherboard grounding) Gateway (best) and Dell (very close 2nd
best). No other PC's yielded a compliant system. [ Even
To be pedantic, you are mixing units of two different quantities there
Mike. Tesla and gauss are units of magnetic flux density, the B field
Ampere/metre and oersted are units of magnetic field strength, the H field.
Only in a vacuum does 1A/m generate a flux density of exactly 0.4 pi µT
In air
Hi, Folks -
We have noticed that not everybody is using the same formula for calculating
E-field inside of a TEM cell.
Does anyone out there have practical formulas (and/or any other useful
information...) relating power to the E-field?
Many thanks in advance,
Cheers,
Kate
Kathy M.
Tony,
When I was in the computer business, we looked for clean _peripherals_. But
merely having one that has few emissions of its own is not enough. You also
need to get one that neither sends any down its peripheral connections, nor
passes those peripherals contribute to be radiated. This turns
Hello,
I am looking to find a clean Class B test bed (PC) for radiated emission
testing. If anyone knows of such a thing please post the manufacturer,
model number, any other information I would need to acquire one for use
here.
Thanks for the help.
Tony Rayman
Topic: COST EFFECTIVE PCB DESIGN
Speaker:John Howard
When: Tuesday 12 February
5:30PM social, meeting at 7 PM
(Food and soft drinks provided)
Where: SGI (Silicon Graphics)
1600 Amphitheater Parkway
Building 40, Ozone Cafe
Mountain View, CA
Abstract
The meaning of TUV per TUV Product Service web site.
Independent TUV's (Technischer Uberwachungsverein, English translation:
Technical Inspection Association) were founded in the 1870's by the German
steam boiler industry. These regional organizations helped regulate and
supervise the safety of
Hi,
The Hitachi Europe website has a app note on
flat panel displays called APPS/043/1.0, titled
flat panel displays - emi considerations.
I have a copy on my hard drive that I would be
willing to send.
dave garnier
-Original Message-
From: XU,CATHERINE (HP-SanDiego,ex1)
George,
I forgot!!! Sorry!!! The Best translations for GS are: Tested Safety
Approved Safety
Proved Safety
I have spoken to many of the German engineers. It appears that there is
not a Direct Translation as I get a
To all,
TUV is Technischer UeberwachungsVerein
The best English Translation is Technical Inspection Association/ Club
To gain more information regarding the translations and history go to
www.tuv.com. Click on Germany - About Us - Our History
Bill Ronzio
Southeast Area Manager
TUV
I think the units you're looking to compare to would be Amps/meter. The
conversion from Tesla to A/m is:
1 A/m = 1.26 uT = 0.0126 Gauss
Therefore, a field of .7 mT converts to 555 A/m !!! (it is also equivalent
to 10 Gauss)
Assuming that your customer is referring to power frequency magnetic
It occurs to me that many folks are not aware that there are many
different TUV agencies authorized to issue the German GS certificate.
In other words, not all agencies with TUV in their title have the
same country laboratory recognition.
The Standards Council of Canada lists TUV Rheinland of
Hi all,
I like to use a spectrum analyser more for diagnostics, and a receiver for
compliance work.
Of course I'm biased, but the Schaffner receiver currently covers 1 GHz, and
the new version about to hit the streets goes to around 20 GHz. Both are
CISPR 16 compliant. I personally feel
There are a series of ENs, 50121, relating to EMC
requirements for railway equipment.
That's all I know - I just noted in my records back
in 1997 that they were starting to appear.
I also note in EN 61000-4-8 Power frequency magnetic
field immunity, that 1 A/m corresponds to a free space
Divine,
I do know that Mexico uses 127V nominal, and standard U.S. type plugs,
both two blade and two blade with ground pin. You do NOT have to
provide three pin plugs unless device is Class I. See Mexico at:
http://www.panelcomponents.com/guide.htm
NOM is more of an import certification
We use TUVRNA for NRTL very successfully.
Paul J. Smith, Teradyne, Boston
richwo...@tycoint.com@majordomo.ieee.org on 02/07/2002 02:17:45 PM
Please respond to richwo...@tycoint.com
Sent by: owner-emc-p...@majordomo.ieee.org
To: emc-p...@majordomo.ieee.org
cc:
Subject: TUV NRTL
Richard,
We have had great experience using the Rohde Schwarz ESI-7. (20Hz -
7GHz)
This receiver takes measurements very quickly, and is very friendly over
the GPIB bus. If you're concerned about price, this unit may not be for
you, but if you are willing to spend some money, you will get
See attached file.
I assume that this is the latest published OJ for EMC standards. I can't
find EN61000-6-1 listed. For the moment I don't have any information if
there are any problems with this standard. But I have seen that DOP will be
April 1 2002. Could it mean that the Commission do not
I checked the OJ a couple of days ago (not just the reflist, I searched all
documents after the latest reflist for EMC stuff) and it was not mentioned.
Chris
-Original Message-
From: John Woodgate [SMTP:j...@jmwa.demon.co.uk]
Sent: 07 February 2002 23:45
To:
Dear All,
Is anybody know about the NOM Mark? What is the applicable standard for an
AC Operated Desk Lamp? In order to get the NOM Approval, does it need to
have the power plug a 3 pin type of plug even though there's no earth
grounding connected. Any feedback from you all regarding this
I read in !emc-pstc that Robert Macy m...@california.com wrote (in
013301c1b033$eed45cc0$69e10...@robert.macy.california.com) about
'Teslars???', on Thu, 7 Feb 2002:
I don't believe those numbers. We have light rail train go by here which is
powered by 600Vac (I believe it's 600 Vac) I haven't
I read in !emc-pstc that Robert Macy m...@california.com wrote (in
013301c1b033$eed45cc0$69e10...@robert.macy.california.com) about
'Teslars???', on Thu, 7 Feb 2002:
If you're English, 1 tesla is 10,000 gauss.
It is, but electronic engineers in Britain use SI units. Magnetic
materials
Martin,
I believe they were saying Tesla (units of magnetic flux density)
1 Tesla = 10,000 gauss so 1 mTesla = 10 gauss
There is a relationship between flux density (B) and magnetic field (H) in A/m
B = mu H (Greek letter mu represents permeability of the material)
EN 61000-4-8 for power
In the MKS system of units, also known as SI(International System), 1 Tesla
= 1 Weber per square meter. Relating it to more usual units, 1 T = 10,000
Gauss, which was the unit in the older cgs measurement system.
The equation defining the relationship between magnetic field and the
currents
I did a search on Hotbot to see what a Teslar is. Some interesting
references come up about watches and protection against EMFs.
Here is an example: http://www.lessemf.com/schumann.html
Regards,
+=+
|Ronald R. Wellman
Hi,
The following paper might be a good references on this topic:
EMC analysis of an 18 LCD monitor
Zeeff, T.M.; Hubing, T.H.; Drewniak, J.L.; Dussroff, R.E.; Van Doren, T.P.
Electromagnetic Compatibility, 2000. IEEE International Symposium on ,
Volume: 1 , 2000
Page(s): 169 -173 vol.1
That's Tesla, which is a weber per sq meter. It is a measure of the B
field, flux per area. If you're English, 1 tesla is 10,000 gauss.
I don't believe those numbers. We have light rail train go by here which is
powered by 600Vac (I believe it's 600 Vac) I haven't seen the fields from
the
Hi Joe:
We have a customer that is concerned about how our product, laboratory
equipment, will respond to electromagnetic disturbances from a high speed
train that runs close to their lab. The customer states that the
disturbance will be around 0.7-1.2 m Teslar.
I believe you
I read in !emc-pstc that am...@westin-emission.no wrote (in LFENJLPMMJB
mhpeibnilceleccaa.am...@westin-emission.no) about 'SV: Immunity
Standards', on Thu, 7 Feb 2002:
CENELEC has proposed DOW July 1 2004. But first it must be published in the
Official Journal.
Are you sure that it has not
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