I am surprised we have heard nothing from Mr Woodgate on this issue - I think
he has very strong views on the whole PLT issue!
-----Original Message-----
From: [email protected] [mailto:[email protected]] On Behalf Of Mark
Gandler
Sent: 17 May 2010 19:35
To: [email protected]; [email protected]
Subject: RE: CE Standard for Power Lines data Transmission System
David,
controversial as it could be (I fully agree, just go to these Ofcom and
Europa links for some fun read http://w
w.ofcom.org.uk/radiocomms/ifi/enforcement/plt/
http://www.europarl.europa.eu/sides/ge
AllAnswers.do?reference=E-2009-3813&language=EN) you still need to test it
and to satisfy EMC Directive.
As you know, the only tricky part/test is Conducted Emission on AC port.
Regardless of attenuation techniques one might employ, if data Tx is on, you
will fail EN55022 test om AC port.
Underlying issue is what your AC port becomes Telecom port at this
instance.
There were numerous attempts by CISPR to provide an adequate test methodology
to address this issue, but all of them are either failed, delayed and yet to
be published. Original idea was to measure CE on AC port against power port
limits with Tx is OFF and against Telecom port limits with Tx is ON. Another
one was to introduce new limits with new setup, using T-ISN. This setup could
be found in CISPR/I/257CD document. Again, this document is just one of
Committee Drafts, which was either shelved already or will not see the
daylight.
The best path to proof your compliance and to satisfy EMC Directive
will be:
1. Test to all currently harmonized standards for ITE product
2. Apply your own engineering judgement as to why you believe
using one or
another test methods is appropriate to your product and write this
justification in TCF
3. Try to get NB opinion. This could be as difficult as bridging
between HAM
enthusiasts and PLC vendors. Very few NB's wants to touch this subject, but
you can shop for some.
Mark
________________________________
Subject: CE Standard for Power Lines data Transmission System
Date: Mon, 17 May 2010 17:48:33 +0300
From: [email protected]
To: [email protected]
Does anyone know what CE/EU standard can be used for testing a power
lines
0.15-30MHz band, data transmission system?
Thanks in advance for any help.
Regards
David Shidlowsky
Technical Writer
EMC Laboratory
ITL (Product Testing) Ltd.
Lod/Kfar Bin Nun
Israel
Tel: +972-8-918-6113
Fax: +972-8-915-3101
Email: [email protected]/[email protected]
<mailto:[email protected]/[email protected]>
http://www.itl.co.il <http://www.itl.co.il/>
http://www.i-spec.com <http://www.i-spec.com/>
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