Date: Tue, 9 Aug 2011 13:53:23 +0400 From: Lev Serebryakov <lev@serebryakov.spb.ru> To: Adrian Chadd <adrian@freebsd.org> Cc: freebsd-wireless@freebsd.org Subject: Re: Bad host-vased AP performace -- and qouple of questions about FreeBSD WiFi stack tuning Message-ID: <7764247.20110809135323@serebryakov.spb.ru> In-Reply-To: <CAJ-VmokAuF6rmN=x1oTE5jksrbf2Psew7-4Qb%2BWd-=kZS1svaQ@mail.gmail.com> References: <1151152206.20110808220720@serebryakov.spb.ru> <201108090829.18712.bschmidt@freebsd.org> <1681554189.20110809132747@serebryakov.spb.ru> <CAJ-VmokAuF6rmN=x1oTE5jksrbf2Psew7-4Qb%2BWd-=kZS1svaQ@mail.gmail.com>
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Hello, Adrian.
You wrote 9 августа 2011 г., 13:35:52:
> There's a dBm to mW chart.
You've forgot link or attache?
I'm looking at:
http://en.wikipedia.org/wiki/DBm
And according to this table my "30" is 1W, which is not believable
(too high). Datasheet says "21.5dBm at 54Mbit", which means ~140mW,
which is in contradiction with "600mW" from same datasheet (or 400mW,
according to other, as I'm not sure about exact version of my card --
it has protection shield from one version and additional power header
from other).
And "15" for iwn card is 32mW, which is not believable (too
low).
> Don't forget antenna gain.
9dBm or 10dBm in my case, oh my. So, result is ~30+10 = 40dBm = 10W?! I don't
understand something here!
--
// Black Lion AKA Lev Serebryakov <lev@serebryakov.spb.ru>
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