From: Vincas Ciziunas (winkie_at_faceprint.com)
Date: 2002-07-03 14:09:47 UTC
Well, I found an email on another list that says what the range of values is for signal. So maybe this might help?? it goes from 0x1b to 0x9a. If this were evenly distributed, that would mean that 0 dBm is at 0x27. Thoughts, ideas anyone?
On Wed, 3 Jul 2002, Tiebing Zhang wrote:
> I am using a PC card on my laptop, and it returns value from -24dBm to
> -80dBm. The closer I am to an AP, the smaller the numbers(abs value)
> go. I did not test this with any MiniPCI card.
>
> --Tiebing
>
> On Tue, 2 Jul 2002, Gerald Britton wrote:
>
> > On Tue, Jul 02, 2002 at 03:00:44PM -0400, Tiebing Zhang wrote:
> > > This is what in the driver:(well, the driver uses +0x100 instead of *(-1))
> > >
> > > #define LEVEL_TO_dBm(v) (((v) * 100 / 255 - 100)*(-1))
> > >
> > > And I found this usefule.
> >
> > This is very clearly wrong for the signal strength information I get in the
> > rx header on my card (MiniPCI card in an IBM Thinkpad), you endup with it
> > saying -140 dBm signal, -200 dBm noise level about 4ft away from the AP.
> > or something roughly that insane.
> >
> > -- Gerald
> >
>