RE: [SI-LIST] : Fwd: Probing power plane with analyser.

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From: Nitin Bhandari (nbhandari@extremenetworks.com)
Date: Thu Sep 28 2000 - 10:12:22 PDT


You might want to try to use a DC blocking capacitor in series with the
probe.
This will protect your analyzer input and still provide you with the
information that you want - the noise spectrum.

Regards,
Nitin

> -----Original Message-----
> From: Barry Ma [mailto:barry_ma@altavista.com]
> Sent: Thursday, September 28, 2000 9:02 AM
> To: si-list@silab.eng.sun.com
> Subject: [SI-LIST] : Fwd: Probing power plane with analyser.
>
>
> ------- Start of forwarded message -------
>
> To: "'EMC - PSTC Forum'" <emc-pstc@majordomo.ieee.org>
> Cc: Roman Seifert <Seifert@ali.com.au>
> Subject: Probing power plane with analyser.
> From: "Cameron O'phee" <O'phee@ali.com.au>
> Date: Thu, 28 Sep 2000 11:59:24 +1100
>
>
> 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
>
>
> Thanks.
> Best Regards,
> Barry Ma <bma@anritsu.com>
> ANRITSU www.anritsu.com
> Morgan Hill, CA 95037
> Tel. 408-778-2000 x 4465
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