I couldn't speak for the automotive limit specifically mentioned in this
thread because I don't have a copy, but every BCI limit I have seen and the
similar IEC 1000-4-6 technique requires some kind of amplitude modulation.
The test is a low frequency radiated susceptibility/immunity requirement
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.
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
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
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
...@emccompliance.com writes:
Subj:FW: ISO 11452-4 Bulk Current Injection Test Requirements
List-Post: emc-pstc@listserv.ieee.org
Date:09/01/02 21:49:17 GMT Standard Time
From:ken.ja...@emccompliance.com (Ken Javor)
Sender:owner-emc-p...@majordomo.ieee.org
Reply-to: ken.ja...@emccompliance.com (Ken
:
owner-emc-pstc@majordomSubject: FW: ISO 11452-4
Bulk Current Injection Test Requirements
o.ieee.org
to be completely revised.
Ken Javor
--
From: Ken Javor ken.ja...@emccompliance.com
List-Post: emc-pstc@listserv.ieee.org
Date: Wed, 09 Jan 2002 16:23:21 -0500
To: scott@jci.com, emc-p...@majordomo.ieee.org
Subject: Re: ISO 11452-4 Bulk Current Injection Test Requirements
Scott,
I am
Scott,
I am not familiar with the standard you cite, but am quite familiar with BCI
testing in general and the equipment used specifically. The injection clamp
used to 400 MHz is only good to 400 or 450 MHz, depending upon manufacturer.
The current probe used to monitor CUT-injected current
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