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Date: Wed, 27 Sep 2006 11:50:45 -0300
From: "Eduardo Meyer" <dudu.meyer@gmail.com>
To: "Pete French" <petefrench@ticketswitch.com>, stable@freebsd.org
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Cc: 
Subject: Re: 802.11 RSSI value displayed from ifconfig(8)
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How bad. But no big deal since I use mainly atheros and senao (prism) cards.

Is this paper's information accurate regarding atheros?

Say, RSSI = 23 is -72dbm?

On 9/27/06, Pete French <petefrench@ticketswitch.com> wrote:
> > Hello, I would like to convert RSSI to dBm (in fact I would love if
> > ifconfig cound display SNR in dBM), so I would like to know if this
> > formula is any right:
>
> Take a look here:
>
> http://www.wildpackets.com/elements/whitepapers/Converting_Signal_Strength.pdf
>
> Especially at the top of page 5. RSSI isn't defined to be in particular
> units, so the formula will be different for each piece of radio hardware
> you have. Unless you have a way of calibrating your specific interface
> then you probably cant do it in any meaningful way.
>
> -pete.
>


-- 
===========
Eduardo Meyer
pessoal: dudu.meyer@gmail.com
profissional: ddm.farmaciap@saude.gov.br