[geeks] Re: 802.11x speeds

wa2egp at att.net wa2egp at att.net
Mon Mar 24 07:48:41 CST 2003


> No - it can't be done. Cellphones have some of the most advanced DSP
> filtering technology available. When I was studying physics at uni, I did
> some work in a high-voltage testing lab (basically a room-sized faraday
> cage). My cellphone used to ring even with the doors sealed!
> 
> That room was rated for something insane like 90+ db attenuation so the
> cell-phone must have been literally reaching down into the noise and
> picking out the signal. At the time I thought that the room sheilding must
> be faulty, but it turned out that the cell-phone was just extraordinarily
> sensitive.

Betcha there was a leak somewhere or they had holes in the shielding which
the RF to come in.  90+ db attenuation at what frequency?


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