Never had to do that bulk current injection test (except some NEBS GR-1089
stuff). Is it with modulated RF, or merely
swept? Keying on and off can be much more severe in its effect than a
continuous carrier, or a gradual increase and
decrease with sweeping frequencies as cables resonate.
I read in !emc-pstc that Rich Nute ri...@sdd.hp.com wrote (in
200201102027.maa26...@epgc264.sdd.hp.com) about 'Switch Inrush
Ratings', on Thu, 10 Jan 2002:
Taking John Woodgate's usual response to such
an inquiry, I did a Google search on inrush.
I don't think I use that response any more often
In a closer-to-safety example, I've seen mobile radio affect screening devices
at a courthouse doorway
(I was parking for jury duty). Key down; lights up. Key up, works normally (40
meter band, about 10
meters away).
I've seen a poorly wired burglar alarm go off 30 meters from my car when I
Yes Ken, I agree.
My humor only provided a grain of truth. Thanks for providing the whole
pound :-)
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
A lot of humor is based on a deliberate misinterpretation of a common phrase
or common wisdom. Take my wife, PLEASE, Or the cute stress relief advice
I got the other day. To relieve a headache, fetch a bottle of aspirin and
follow the directions: Take two aspirin and keep away from children.
I have a little different experience than the other respondents to date, who
pretty much said no extrapolation is possible from one band to another.
My experience and analytical training tell me that if field intensity and
modulation are held constant, then above 1 GHz coupling to wires running
I belive emissions standards were designed to allow proper operation of radios
and televisions with minimal irritation. This would include sound and video
quality. I heard this story a long time ago with respect to FCC limits.
On the other hand, immunity standards were developed so equipment
Taking John Woodgate's usual response to such
an inquiry, I did a Google search on inrush.
Surprisingly (to me), there is a wealth of
reasonably good info on the web under the subject
of inrush, including switches rated for inrush
current.
Best regards,
Rich
If I assume that the top loaded antenna acts as a quarter wave stub, that is
it is extremely efficient at radiating all the power presented at the base
and not reflecting any back, and if I further assume this is CB band or
higher (essentially at or above 30 MHz), then 600 Watts 5 meters away
Duncan,
You might want to get all the info you can get on
contact ratings for mechanical relays and contactors.
Then, use that information by analogy.
DC operation of a switch is the more destructive by
orders of magnitude than AC operation. Since the
normal cycle of AC will quench any
A worst case -- real world -- is probably just behind a radio equipped car,
mounting a capacitively top-loaded
antenna at its rear edge, and about 600 watts of RF.
With rather less power, 100 watts, I've occasionally seen adjacent cars'
engines stop when I transmit. It would be
interesting to
To all,
I have left my post as Business Development Manager of Flextronics and have
taken on the position of Southeast Area Manager for TUV Rheinland of N.A.
If you need to contact me, my new information is below.
Bill Ronzio
Southeast Area Manager
TUV Rheinland of N.A., Inc.
762 Park Avenue
I have to agree with Peter - just because it passes in one band doesn't mean
it
will pass in another. For argument's sake in one instance, consider the loop
area
of a signal and it's return - it's effective at specific
frequencies/frequency bands.
Also consider why the new standard(s) added the
From: Douglas Beckwith@MITEL on 01/10/2002 11:17 AM
Aha, a man after my own heart. Now you are talking about real cars. As an ex
South African living in Canada, I still can't get used to the idea of driving on
the the wrong side of the road.
Doug Beckwith
Veit, Andy andy.v...@mts.com on
Interesting - What was intended to be a humorous remark actually
received some serious response!
John
-Original Message-
From: owner-emc-p...@majordomo.ieee.org
[mailto:owner-emc-p...@majordomo.ieee.org]On Behalf Of Veit, Andy
Sent: Thursday, January 10, 2002 5:29 AM
To:
Try putting a mobile phone next to your computer mouse! Even more fun if the
computer has speakers!
Peter
-Original Message-
From: ari.honk...@nokia.com [mailto:ari.honk...@nokia.com]
Sent: Thursday, January 10, 2002 1:23 PM
To: am...@westin-emission.no
Cc: emc-p...@majordomo.ieee.org
I read in !emc-pstc that Veit, Andy andy.v...@mts.com wrote (in
421e2204a588d111b8bf00a0c995f26801be9...@smtpgate.mts.com) about
'radar', on Thu, 10 Jan 2002:
I can think of at least one good reason to take a RHD car out of the UK -
its called the Lotus Super 7.
There, its out in the open now.
Keith,
I thought of you because of previous statements that the automotive industry
wasn't testing hard enough and this seemed to me a counter-example of
massive unjustified overkill. My apologies, in the future I will only
respond to direct postings.
Ken Javor
on 1/10/02 8:52 AM,
Why would someone want to take a car out of UK with the
steering wheel on the wrong side?
I can think of at least one good reason to take a RHD car out of the UK -
its called the Lotus Super 7.
There, its out in the open now. I am a British car nut. :)
Rerards,
Andrew Veit
Systems Design
Hi,
today I heard about a case where an ISDN terminal was susceptible to a
DECT phone next to it while a 900 MHz GSM did not cause anything. This
was in the field, not in test lab.
In test lab my experience is that if it passes below 1 G it does it also
above it.
However, as the 1.4-2 GHz sweep
Hi Ed,
in Germany you have speed ratings for your tires, beginning at 160 KPH
(100 mph)and then on to 190, 220 and 250 and beyond (some cars really go
that fast, take a Porsche or a Ferrari). BMW and Mercedes have a
gentleman agreement that these cars can't exceed 250 KPH (abt 156
mph).
But of
Imagine that, holding someone accountable for their own actions!
What a novel concept.
I doubt it would ever be accepted in the US.
MOO
J.Feldhaar j.feldhaar%telejet...@interlock.lexmark.com on 01/10/2002
08:00:52 AM
Please respond to J.Feldhaar j.feldhaar%telejet...@interlock.lexmark.com
Ken and others,
Yes, we have witnessed some very interesting deviations (as you may guess)
in product performance due to the intense RF Fields/Currents seen during
testing. Our designs are impacted by this test on a regular basis. We
would definitely entertain the idea of making the
RF immunity testing in the frequency range 80-1000MHz has been common in EU
for several years. Now, new standards also include testing in the 1-2GHz
band (3V/M or 10V/m, 1kHz sine, 80% AM)
We have done a lot of testing in the 80-1000MHz band and quite often the
EUTs failed. We have also done
Darren
Please look at www.int-app.tuv.com.
Best regards
Glenn Moffat
TUV International UK
Tel: +44 121 634 8000
Fax: +44 121 634 8080
Hi every one,
I am currently trying to get a radio device approved in China,
Can any one tell me who the authority is in China, or help with a contact
e
Hi Folks.
At the moment I'm examining as a generic case, the potential for
interference with Item A (tested to comply with 3V/m radiated immunity)
caused by Item B (tested to comply with FCC or EN Class A [industrial]
emissions).
Using simple inverse distance ( E2 = E1 x d1/d2 ) extrapolation
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