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 Subject: Re: 802.11 RSSI value displayed from ifconfig(8) Message-ID: <d3ea75b30609270750q1664c29dl8f458eb4783e58ed@mail.gmail.com> In-Reply-To: <E1GSaLC-000EQI-L6@dilbert.firstcallgroup.co.uk> References: <d3ea75b30609270710u19d01124n6cae749a943bde99@mail.gmail.com> <E1GSaLC-000EQI-L6@dilbert.firstcallgroup.co.uk>
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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
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