[SI-LIST] Re: ground planes at top / bottom layer
- From: "Todd Hubing" <HUBING@xxxxxxxxxxxxxxxxxxxx>
- To: <si-list@xxxxxxxxxxxxx>
- Date: Wed, 7 Jan 2009 10:37:37 -0500
The main board of the XBox is housed in a shielded enclosure. Most PC
housings have so many significant seams and apertures that it is
difficult to classify them as shielded enclosures. These enclosures
capture stray electric fields, but do not prevent re-radiation at
enclosure resonances. This is also true for most automotive and consumer
electronics.
Well designed metal enclosures can make a significant difference in
radiated emission and immunity levels, but there are many examples of
PCs and peripherals that are designed well enough that they do not
require a metal housing.
Todd Hubing
Clemson Vehicular Electronics Lab
http://www.cvel.clemson.edu
-----Original Message-----
... I also noticed that virtually every PC has a metal case,
which is a second level of costly shielding.
(Not sure if this also true for the XBox)
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