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 =C1=D7=C7=D5=D3=D4=C1 2011 =C7., 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 =3D 40dBm =3D 10W?!= I don't understand something here! --=20 // Black Lion AKA Lev Serebryakov <lev@serebryakov.spb.ru>
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