Doug
You say "Domestic 3 meter..". I believe Class A devices are intended for
industrial use only and not domestic.
Anyway, as far as the FCC and the European EMC directive is concerned then a
3m test distance is acceptable. However, in the event of dispute then
measurements at 30m take precedence.
To correct for the shorter measurement distance the limit line should be
raised by approximately 20dB for Class A devices. However, ensure that the
test distance is greater than:
(2D^2)/lambda Where D = maximum EUT dimension
and lambda = shortest wavelength
to be measured.
The Japanese also accept a 3m measurement distance. However I believe that
Taiwan insist on 10 and 30m measurements.
Thanks
Ian Gordon
Thanks
Ian Gordon
BOC Edwards
15 Marshall Road
Eastbourne
East Sussex BN22 9BA
Tel: 01323 501147
Fax: 01323 509824
-----Original Message-----
From: Doug McKean [mailto:[email protected]]
Sent: 09 August 2002 18:19
To: EMC-PSTC Discussion Group
Subject: Domestic 3 meter chamber emissions testing for the world ...
Importance: High
What's the bottom line with Class A emissions testing in a 3 meter
chamber in the US for emissions approval anywhere in the world?
Does the FCC accept such testing for the US?
What about for European CE marking under the EMC Directive?
How about Taiwan?
How about Japan?
Been a while since I've had to deal with this issue.
Any input here or offline will be appreciated.
Thanks in advance.
Regards, Doug McKean
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