RE automotive standards, think about the multitude of susceptible devices now
found in a automobiles, many on a 2-wire, AC coupled data bus. So when I
drive by transmitting at 500V/m (near field), what happens? Hmm,
IIRC MIL-STD-462d said the radiated susceptibilty level was selected by
reference to radiated emissions.
I had to take a 1.5 KW Amateur linear to work a few weeks ago so our lab could
reach 100V/m. But they don't normally do RS testing..
Cortland
KA5S
----- Original Message -----
From: Bill Owsley <mailto:[email protected]>
To: MarkoRadojicic <mailto:[email protected]> ;Ken Javor
<mailto:[email protected]> ;[email protected];Gary Wong
<mailto:[email protected]>
Sent: 10/30/2009 6:58:17 PM
Subject: RE: Where does 3V/m & 10V/m in RI come from?
The automotive guys are having a bit of a chuckle.
Their immunity levels are somewhat higher due to field surveys of what field
strengths the cars might be driven through.
At one point a few years ago one car manufacturer was asking for 600 V/m. I
think they settled on 200 V/m. Do car drivers complain more about their cars
than the house stereo??
- Bill
In the event of a national emergency, click on the following links to provide
directions to your duly elected mis-representative.
http://www.usa.gov/Contact/Elected.shtml
or...
https://writerep.house.gov/writerep/welcome.shtml
http://www.senate.gov/general/contact_information/senators_cfm.cfm
--- On Fri, 10/30/09, Gary Wong <[email protected]> wrote:
From: Gary Wong <[email protected]>
Subject: RE: Where does 3V/m & 10V/m in RI come from?
To: "Radojicic, Marko" <[email protected]>, "Ken Javor"
<[email protected]>, [email protected]
Date: Friday, October 30, 2009, 5:24 PM
Marko:
I remembered the RI levels were based on field strength survey of the
populated areas close to the radio transmitter towers.
There are lots of field survey papers about the RI limits presented to
and
reviewed by the committees for ballot.
One famous case was the kitchen fan playing radio music because the
house
close to the AM transmitter tower was exposed to 10V/m field strength.
Cheers,
Gary Wong
Technical Leader
H/W Engineering
[email protected] <http://us.m
396.mail.yahoo.com/mc/[email protected]>
Direct: 925.474.2244
Phone: 925.474.2200
Fax: 925.251.0642
----------
Privileged/Confidential Information of Belden may be contained in this
message. If you are not the addressee of this message, you may not read, copy
or use this message, or deliver this message to anyone. In such event, you
should destroy the message and kindly notify the sender by reply e-mail.
It is understood that opinions or conclusions that do not relate to
official
business of Belden are neither given nor endorsed by Belden.
________________________________
From: [email protected] [mailto:[email protected]] On Behalf Of
Radojicic,
Marko
Sent: Friday, October 30, 2009 12:59 PM
To: Ken Javor; [email protected]
Subject: RE: Where does 3V/m & 10V/m in RI come from?
Hi Ken,
From your response, you probably don’t know Alvin very well if at all.
You can say a lot of things about Alvin (and I probably have :-) ) but
embarrassing the profession isn’t one of them.
But backing off from the personal issues, your response didn’t really
address the question of where the limits come from. Having participated in
standards making committees, I would have to say that there is as much
political posturing as engineering going on. I seriously doubt that there is
any scientific investigation that points to 1, 3, 10 V/m providing adequate
protection for certain environments. I always assumed that the standards
committee picked these numbers because they looked good on a logarithmic
chart.
It would be informative if someone on the forum was actually a member
of the
original CISPR committee and could refute my [perhaps] jaded experience.
…Marko
-
----------------------------------------------------------------
This message is from the IEEE Product Safety Engineering Society
emc-pstc
discussion list. To post a message to the list, send your e-mail to
<[email protected] <http://us.mc396.mai
.yahoo.com/mc/[email protected]> >
All emc-pstc postings are archived and searchable on the web at
http://www.ieeecommunities.org/emc-pstc
Graphics (in well-used formats), large files, etc. can be posted to
that URL.
Website: http://www.ieee-pses.org/
Instructions: http://listserv.ieee.org/request/user-guide.html
List rules: http://www.ieee-pses.org/listrules.html
For help, send mail to the list administrators:
Scott Douglas <[email protected] <h
tp://us.mc396.mail.yahoo.com/mc/[email protected]> >
Mike Cantwell <[email protected] <htt
://us.mc396.mail.yahoo.com/mc/[email protected]> >
For policy questions, send mail to:
Jim Bacher <[email protected] <http://
s.mc396.mail.yahoo.com/mc/[email protected]> >
David Heald <[email protected] <http://
s.mc396.mail.yahoo.com/mc/[email protected]> >
-
----------------------------------------------------------------
This message is from the IEEE Product Safety Engineering Society
emc-pstc
discussion list. To post a message to the list, send your e-mail to
<[email protected]>
All emc-pstc postings are archived and searchable on the web at
http://www.ieeecommunities.org/emc-pstc
Graphics (in well-used formats), large files, etc! . can be posted to
that
URL.
Website: http://www.ieee-pses.org/
Instructions: http://listserv.ieee.org/request/user-guide.html
List rules: http://www.ieee-pses.org/listrules.html
For help, send mail to the list administrators:
Scott Douglas <[email protected]>
Mike Cantwell <[email protected]>
For policy questions, send mail to:
Jim Bacher <[email protected]>
David Heald <[email protected]>
-
----------------------------------------------------------------
This message is from the IEEE Product Safety Engineering Society
emc-pstc
discussion list. To post a message to the list, send your e-mail to
<[email protected]>
All emc-pstc postings are archived and searchable on the web at
http://www.ieeecommunities.org/emc-pstc
Graphics (in well-used formats), large files, etc. can be posted to
that URL.
Website: http://www.ieee-pses.org/
Instructions: http://listserv.ieee.org/request/user-guide.html
List rules: http://www.ieee-pses.org/listrules.html
For help, send mail to the list administrators:
Scott Douglas <[email protected]>
Mike Cantwell <[email protected]>
For policy questions, send mail to:
Jim Bacher <[email protected]>
David Heald <[email protected]>
-
----------------------------------------------------------------
This message is from the IEEE Product Safety Engineering Society
emc-pstc
discussion list. To post a message to the list, send your e-mail to
<[email protected]>
All emc-pstc postings are archived and searchable on the web at
http://www.ieeecommunities.org/emc-pstc
Graphics (in well-used formats), large files, etc. can be posted to
that URL.
Website: http://www.ieee-pses.org/
Instructions: http://listserv.ieee.org/request/user-guide.html
List rules: http://www.ieee-pses.org/listrules.html
For help, send mail to the list administrators:
Scott Douglas <[email protected]>
Mike Cantwell <[email protected]>
For policy questions, send mail to:
Jim Bacher <[email protected]>
David Heald <[email protected]>
-
This message is from the IEEE Product Safety Engineering Society emc-pstc
discussion list. To post a message to the list, send your e-mail to
<[email protected]>
All emc-pstc postings are archived and searchable on the web at
http://www.ieeecommunities.org/emc-pstc
Graphics (in well-used formats), large files, etc. can be posted to that URL.
Website: http://www.ieee-pses.org/
Instructions: http://listserv.ieee.org/request/user-guide.html
List rules: http://www.ieee-pses.org/listrules.html
For help, send mail to the list administrators:
Scott Douglas <[email protected]>
Mike Cantwell <[email protected]>
For policy questions, send mail to:
Jim Bacher <[email protected]>
David Heald <[email protected]>
