I think the spurious emissions would be a big problem. You would be
amazed at the levels of EMI emitted by phones when they are in certain
modes. While looking at some dual tri-mode digital phones from 3
different manufacturers (while placing digital calls in the 1800± MHz
range?? or
Absolutely correct. I ASSUMED that what was meant was that shielding the
cable resulted in no better than a 6 dB reduction in cable-sourced
emissions. Something you could check with a current probe. If an entire
system is being tested then clearly other emission sources could mask any
I have been asked the following question:
Does anybody have any experience with pacemakers and multiple spark
discharge ignitions? We would like to know if there is any trouble with a
pacemaker when it gets close to a high powered ignition.
If there is anyone who is racing cars and has a
Dear All,
I am looking for an inexpensive AC to DC power supply with an ADJUSTABLE
0-80 V dc and up to 125 A output. I am sure many of these power supplies exist
now that the telecom industry is not doing too well.
Peter
_
Do you Yahoo!?
Yahoo! Tax Center http://rd.yahoo.com/
-Original Message-
From: John Woodgate [mailto:j...@jmwa.demon.co.uk]
Sent: Saturday, February 22, 2003 12:05 AM
To: emc-p...@majordomo.ieee.org
Subject: Re: IEC 61010 requirements
I read in !emc-pstc that peter merguerian pmerguerian2...@yahoo.com
wrote (in
The fact that going from unshielded to shielded cable cut emissions by 6 dB
does not necessarily mean that the shield cut cable emissions by only 6 dB. It
could mean that the cable emissions have been greatly reduced but another part
of the system has emissions that are 6 dB below the original
Dear All,
I am looking for an inexpensive AC to DC power supply with an ADJUSTABLE
0-80 V dc and up to 125 A output. I am sure many of these power supplies exist
now that the telecom industry is not doing too well.
Peter
_
Do you Yahoo!?
Yahoo! Tax Center http://rd.yahoo.com/
If he had a LOW EMI Phone, how was he able to transmit out of the
OR? It is not the incidental radiation that is the problem, it is the
transmitter. Also, how was he able to answer the phone and maintain
sterilization?
John Shinn
From: owner-emc-p...@majordomo.ieee.org
EMC-PSTC'ers,
My article Designing Electronic Systems for ESD Immunity just came out
in the February 2003 Conformity magazine, pages 18-27. If you don't
receive the magazine you can download the article from their web site at
http://www.conformity.com/
Enjoy!
John Barnes
Maybe he had a special low EMI cell phone? But seriously, a useful product
would be a cell phone detector with an audible alarm, or a silent alarm to
alert security.
Dave Cuthbert
From: John Woodgate [mailto:j...@jmwa.demon.co.uk]
Sent: Saturday, February 22, 2003 1:05 AM
To:
Many good Sorenson, HP, Agilent, and other units always seem to be available
on ebay. Be careful how you pay.
Search for Surplus Test Equipment on google.
good luck,
Brian
I am looking for an inexpensive AC to DC power supply with an ADJUSTABLE
0-80 V dc and up to 125 A output. I am sure
Hi Folks
The end of the URL appears to have wrapped, so add umentALT to it from
the 2nd line.
Regards
John Allen
From: John Allen [mailto:john.al...@era.co.uk]
Sent: 24 February 2003 13:16
To: 'Nick Williams'; emc-p...@majordomo.ieee.org
Subject: RE: GOST standards
Nick
Try the GOST Stds
To Jan Vercammen and Michael Nagel and the whole forum,
If a decent shield only provides 6 dB of shielding effectiveness at best,
that is an indictment of the termination impedance(s) and Doug Smith is
right, other techniques need to be investigated for reducing emissions and
immunity.
Ken
I currently have a conformally coated board that I need to be tested according
to EN 60730-1. The certification agency requires that my conformal coat be a
Type A conformal coat according to EN 60730-1. (In other words it must fufill
annex P and Annex Q of EN 60730-1)
I currently am
Nick
Try the GOST Stds Search Engine on
http://www.gost.ru/sls/gost.nsf/PVP/1762244D53B86C4AC32566DE0038560E?OpenDoc
umentALT
Regards
John Allen
Technical Consultant
Safety and Risk Management
ERA Technology Ltd
Cleeve Rd
Leatherhead
Surrey KT22 7SA
Tel:+44 (0) 1372-367025 (Direct)
I read in !emc-pstc that Nick Williams nick.willi...@conformance.co.uk
wrote (in p05200f07ba7fa37407a5@[192.168.1.29]) about 'GOST standards'
on Mon, 24 Feb 2003:
Is there anywhere I can identify some sort of cross reference between
the GOST standard numbers and the EN standards (if indeed such
I've been asked to look at a piece of equipment which is made in
Russia and which has numerous certifications to various GOST
standards.
Is there anywhere I can identify some sort of cross reference between
the GOST standard numbers and the EN standards (if indeed such a
comparison is
This is a multi-part message in MIME format.
Dear Cheng-Wee Lai
For EU you will need an E marking, since 1/10 2002 the CE marking is not longer
enough for this kind of equipment. This approval process is not very good
implemented in EU. You are free to choose any national authority within EU but
Hello,
I can confirm Doug's remarks, a badly designed Ethernet system shielding
can behave much
worse than an unshielded one. I have don EMC tests with foil-shielded TWP
and unshielded TWP.
If the shield and/or the connector are not connected properly then radiated
emissions and
susceptibility
Hi Doug and the group,
I think the issue is a bit more complex than that. The cables can be an
effective antenna
in both cases but the reasons are not the exactly the same.
Speaking for shielded cables the failures you have seen are (from my
experience) the already
mentioned pigtails, the
Dear Brian,
most European approval agencies accept an CSA approved blower also for
Europe. It means, that the f
- fammability
- motor blocking
- motor overlaod is checked already.
For CE-mark (= self declaration) above is sufficient.
With best regards
Horst
INNOVA Product Service GmbH
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