Re: Fiber optic cable testing per EN 55022:1998 ?

2003-01-12 Thread John Woodgate 

I read in !emc-pstc that Gary McInturff  wrote (in <917063bab0ddb043af5faa73c7a835d401de2...@windlord.wwp.C
OM>) about 'Fiber optic cable testing per EN 55022:1998 ?' on Sun, 12
Jan 2003:

>Its during the immunity portion that is under question, and throwing a fiber 
>cable into a trench to inject noise isn't purposeful.

I'm sure you know what you mean, but I don't.
-- 
Regards, John Woodgate, OOO - Own Opinions Only. http://www.jmwa.demon.co.uk 
Interested in professional sound reinforcement and distribution? Then go to 
http://www.isce.org.uk
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new paper posting

2003-01-12 Thread Doug Smith 

Hi Everyone,

I have just posted one of my recent papers titled "Sources of 
Impulsive EMI in Large Server Farms" on my website at:

http://emcesd.com

The link is near the top of the index page with the "News Note." The 
paper is on pdf format and about 770K in length.

Doug

 ___  _   Doug Smith
  \  / )  P.O. Box 1457
   =  Los Gatos, CA 95031-1457
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  /  /\  \ ] /  /\  \ Mobile:  408-858-4528
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RE: Fiber optic cable testing per EN 55022:1998 ?

2003-01-12 Thread Gary McInturff 

I'm not sure anybody is arguing about having the cables in place during
emissions testing. They have to be there to exercise the equipment. Its during
the immunity portion that is under question, and throwing a fiber cable into a
trench to inject noise isn't purposeful.
Gary


From: John Woodgate [mailto:j...@jmwa.demon.co.uk]
Sent: Saturday, January 11, 2003 5:31 AM
To: emc-p...@majordomo.ieee.org
Subject: Re: Fiber optic cable testing per EN 55022:1998 ?



I read in !emc-pstc that Juhasz, John (IndSys, GE Interlogix)
 wrote (in <4606624A2A8ABE41AFBA5F8306F2ECB203611C@F
TWMLVEM01.e2k.ad.ge.com>) about 'Fiber optic cable testing per EN
55022:1998 ?' on Fri, 10 Jan 2003:

>Is there anyone subscribed to this forum who is on 
>the EN 55022 committee who could possibly shed light on this?

Emission testing according to CISPR 22 requires the product to be
configured in an attempt to maximise emissions. This means that all or
most cables are connected, since most emission normally comes from
cables. If some of these cables are fibre-optic, so be it.
-- 
Regards, John Woodgate, OOO - Own Opinions Only. http://www.jmwa.demon.co.uk 
Interested in professional sound reinforcement and distribution? Then go to 
http://www.isce.org.uk
PLEASE do NOT copy news posts to me by E-MAIL!


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