Cameron,
If you are looking for a measure of the conducted RF coming off the
board the standard AC LISN works for DC power as well. The voltage probe
per CISPR 16 will also work and gives a standardized impedance that can be
probed from point to point (or if you are looking for a "down and dirty"
measurement just put a capacitor in series with your probe to block the
DC).
Paul McCoy
"Cameron O'phee" <O'p...@ali.com.au>@ieee.org on 09/27/2000 07:59:24 PM
Please respond to "Cameron O'phee" <O'p...@ali.com.au>
Sent by: owner-emc-p...@ieee.org
To: "'EMC - PSTC Forum'" <emc-p...@majordomo.ieee.org>
cc: Roman Seifert <seif...@ali.com.au>
Subject: Probing power plane with analyser.
Hello All,
I have been asked by one of our design engineers if I can measure the RF
signature on the 3v plane on one of our PCB designs. The purpose of this
is
to compare it to proposed changes for cost reduction, ie removal of bypass
caps. I would assume I need some sort of CDN but I have no designs for
this
application. Does anyone have any ideas on how I can safely probe a 3v DC
power rail with an EMC analyser (HP8591E)?
Regards,
Cameron O'Phee.
EMC & Safety Precompliance.
Aristocrat Technologies Australia.
Telephone : +61 2 9697 4420
Facsimile : +61 2 9663 1412
Mobile : 0418 464 016
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