Captain Obvious here:

I would run an ambient survey to see what's out there, and given a broadband
antenna like that, you likely need a preselector to to protect from strong
out-of-band signals.

If you have strong FM signals, you might want to consider a logperiodic that
include the entire FM BCB so that the antenna can be oriented with the
transmitter behind it to take advantage of a logperiodic's front-to-back
ratio.  A preselector only helps out-of-band, and you will need to measure
in the FM-band.

The above paragraph only really pertains if you have strong directionality
in the broadcast. If your parking lot is in the middle of a city with
buildings all over the place, that likely won't be the case.

Ken Javor
Phone: (256) 650-5261


> From: Ralph McDiarmid <ralph.mcdiar...@schneider-electric.com>
> Reply-To: Ralph McDiarmid <ralph.mcdiar...@schneider-electric.com>
> Date: Tue, 19 Jul 2016 17:00:31 +0000
> To: <EMC-PSTC@LISTSERV.IEEE.ORG>
> Conversation: [PSES] outdoor EMC testing - questions
> Subject: Re: [PSES] outdoor EMC testing - questions
> 
> Dear group,
> 
> We are planning to do radiated emissions on a large EUT (a large power
> converter) and use a portion of our outdoor, asphalt parking lot as an open
> area test site.
> We plan to walk an antenna around the EUT, since the EUT and its cabling are
> too large to rotate on a platform.   It will be installed in a way very
> similar to actual use in the field, so I think this is quite close to in-situ
> testing.
> 
> 1. has anyone tried this?
> 2. apart from a site attenuation test, and perhaps a ground plane metal mesh,
> what else would be needed?
> 
> We have facility filters for AC and for DC and voltage probe, current probe,
> one "BiConilog" antenna and a nice new SA.  We are working with a US EMC
> company, and they are a Notified Body under the MRA.
> 
> Thanks,
> 
> Ralph McDiarmid
> Product Compliance
> Engineering
> Solar Business
> Schneider Electric
> 
> 
> 
> 
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