Monrad,
The floor standing issue come about from an EUT where the radiating element
(slot or antenna) is below the absorber material. It's not possible or
practical in many cases to raise a large EUT above the absorber material.
Earlier this year I read a position paper that explained there may be up to
18dB of error with large floor standing systems. The absorber material
"blocks" or absorbs the direct wave from the EUT.
Additionally with large floor standing EUT's (for example a 6 meter X 2 meter
rectangle) the test will have to be performed much like a radiated immunity
test; that is, rather than rotating the turntable, the antenna must be moved.
For each measurement position, based on the beam-width of the antenna, the
antenna will have to be moved in both the X and Y axis to maximize the
emission.
An emissions test which took a few hours now would take well over a day to
perform.
Regards,
David Spencer
EMC Engineer
Xerox Corp
________________________________
From: [email protected] [mailto:[email protected]]
Sent: Friday, August 21, 2009 2:39 PM
To: Spencer, David H
Cc: [email protected]
Subject: Re: EN55022:1998, +A1:2000, +A2:2003 Extended
You can view the clean PDF of 2009/C 197/03 issued today at the
following web
address:
http://eur-lex.europa.eu/LexUriServ/Le
UriServ.do?uri=OJ:C:2009:197:0003:0003:EN:PDF
Based on the 2009/C 197/03, it appears that manufacturers are granted an
extra year before their products must meet the requirements of
EN55022:2006+A1:2007 which requires testing in 1-6GHz with the 4dB tighter
limits compared to FCC in the frequency range 1-3GHz. The new deadline is 1
October 2011.
I haven't heard of any issues about floor-standing equipment. We have
floor-standing equipment and the testing goes smoothly. However, every
information technology manufacturer was under a lot of time pressure to test
already released products to the new test methodology and limits -- especially
if you have a big product line. With the limits at 1-3GHz being 4dB tighter
than FCC, some products may require fixes or an accelerated End-of-Life (EOL)
decision. This one year delay gives manufacturers more time to perform the
testing and make those decisions.
I have some related questions:
1. Will Japan VCCI delay its 1 October 2010 deadline to match Europe?
2. Will China CCC delay its 1 March 2011 deadline to still give an
extra
five months time after the Europe deadline to go through the in-country test
and bureaucracy effort to update the CCC approvals? I would hope the 1-6GHz
test requirement would be delayed to at least 1 March 2012.
3. Will China CCC delay its 1 September 2010 deadline to upgrade CCC
approvals to include the testing of telecommunications ports? Unfortunately,
if this deadline is not extended, we will still have to rush to send all our
products to China for testing even if the 1-6GHz test requirement is delayed.
Thanks.
Monrad L. Monsen
Worldwide Compliance Officer
Sun Microsystems
[email protected]
Spencer, David H wrote:
I'm assuming this has is due to the huge issues with floor
standing EUT's
and testing >1GHz.
Text From OJ. Aug 21, 2009
"Commission communication in the framework of the
implementation of
Directive 2004/108/EC of the European Parliament and of the Council on the
approximation of the laws of the Member States relating to electromagnetic
compatibility and repealing Directive 89/336/EEC
(Text with EEA relevance)
(Publication of titles and references of harmonised standards
under this
directive)
(2009/C 197/03)
The date of cessation of presumption of conformity for ‘EN
55022:1998
Information technology equipment — Radio disturbance characteristics —
Limits and methods of measurement (CISPR 22:1997 (Modified))’ and its
amendments ‘A1:2000 to EN 55022:1998 (CISPR 22:1997/A1:2000)’ and
‘A2:2003 to EN 55022:1998 (CISPR 22:1997/A2:2002)’ which was set out in
the Commission communication published in the Official Journal of the European
Union C 126 of 5 June 2009, is postponed until 1 October 2011.
Commission communication in the framework of the implementation
of Directive
1999/5/EC of the European Parliament and of the Council on radio equipment and
telecommunications terminal equipment and the mutual recognition of their
conformity
(Text with EEA relevance)
(Publication of titles and references of harmonised standards
under this
Directive)
(2009/C 197/04)
The date of cessation of presumption of conformity for ‘EN
55022:1998
Information technology equipment — Radio disturbance characteristics —
Limits and methods of measurement (CISPR 22:1997 (Modified))’ and its
amendments ‘A1:2000 to EN 55022:1998 (CISPR 22:1997/A1:2000)’ and
‘A2:2003 to EN 55022:1998 (CISPR 22:1997/A2:2002)’ which was set out in
the Commission communication published in the Official Journal of the European
Union C 280 of 4 November 2008, is postponed until 1 October 2011."
Regards,
David Spencer
EMC Engineer
Xerox Corp
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