who understand binary and
those who don't. J. Paxman
From: Bill Owsley [mailto:wdows...@yahoo.com]
Sent: 29 October 2010 23:26
To: EMC-PSTC@LISTSERV.IEEE.ORG
Subject: Re: [PSES] Different Radiated Emissions results at different labs
*** WARNING *** This message
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--- On Fri, 10/29/10, Derek Walton wrote:
From: Derek Walton
Subject: Re: Different Radiated Emissions
I'd look more to the test software, EUT set up and the
operators technique.
Sincerely,
Derek Walton
L F Research
-Original Message-
From: Charlie Blackham
To: EMC-PSTC@LISTSERV.IEEE.ORG
Sent: Fri, Oct 29, 2010 2:04 am
Subject: Different Radiated Emissions results at different
EE.ORG
Subject: RE: [PSES] Different Radiated Emissions results at different labs
You should be using a different test lab.
We have never had that much of a variation on the same EUT. I attribute that
to using a true EMI receiver, which has much better amplitude accuracy then a
spectrum anal
In message
,
dated Fri, 29 Oct 2010, Larry Stillings
writes:
>I have seen products leave the lab and come back and have the same
>profile within 1 dB or less.
It's reasonable to think that the repeatability is dependent on the fine
details of the product and its AEs and cables.
--
OOO - Ow
a challenge J
#Amund
Fra: Charlie Blackham [mailto:emcp...@sulisconsultants.com]
Sendt: 29. oktober 2010 09:04
Til: EMC-PSTC@LISTSERV.IEEE.ORG
Emne: [PSES] Different Radiated Emissions results at different labs
Group
Testing a product to CISPR11 class B and seeing quite
Seen as much as 12 dB at test labs which have performed site testing with
less than 0.5dB variation between them.
1.8dB was traced to spectral regions using conservative antenna factor
table, and part [at least to my thinking] was caused by the choice of GND
plane which interacts with the variatio
Fra: Charlie Blackham [mailto:emcp...@sulisconsultants.com]
Sendt: 29. oktober 2010 09:04
Til: EMC-PSTC@LISTSERV.IEEE.ORG
Emne: [PSES] Different Radiated Emissions results at different labs
Group
Testing a product to CISPR11 class B and seeing quite a difference in results
below 1 GHz when
In message <00f201cb7737$825fe3a0$871faae0$@com>, dated Fri, 29 Oct
2010, Charlie Blackham writes:
>Testing a product to CISPR11 class B and seeing quite a difference in
>results below 1 GHz when tested at two different labs.
How much is 'quite a difference'? It's quite normal to find differen
Group
Testing a product to CISPR11 class B and seeing quite a difference in results
below 1 GHz when tested at two different labs.
I don’t wish to discuss why this is being done, but would be very grateful
for any Quantitative data people have on differences between different OATS or
betwee
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