From owner-freebsd-wireless@FreeBSD.ORG Tue Aug 9 10:14:21 2011 Return-Path: Delivered-To: freebsd-wireless@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id 149491065672 for ; Tue, 9 Aug 2011 10:14:21 +0000 (UTC) (envelope-from adrian.chadd@gmail.com) Received: from mail-gx0-f182.google.com (mail-gx0-f182.google.com [209.85.161.182]) by mx1.freebsd.org (Postfix) with ESMTP id C433B8FC26 for ; Tue, 9 Aug 2011 10:14:20 +0000 (UTC) Received: by gxk28 with SMTP id 28so1351641gxk.13 for ; Tue, 09 Aug 2011 03:14:19 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=mime-version:sender:in-reply-to:references:date :x-google-sender-auth:message-id:subject:from:to:cc:content-type :content-transfer-encoding; bh=LoOXeQkE7dgXpI58cRVmNi17H6USycL0jvJ9T/MmB1o=; b=MvHuH4Zjlcvuo1Mi9uzuXMCjk887vOhcd5qHIKHDcaMl8xHj14N7Ni/sIEAjwM3PfM ZUoRjakc33NX4+wsT5w+5kzVTs0+cmq12T1raLmYGSvCJrQdcL0t6Dk+jLecB+/+MMQb RIf3vM3TkpIaI3udSx1YIwS7CFLU47Wxp/sjI= MIME-Version: 1.0 Received: by 10.151.118.1 with SMTP id v1mr3523480ybm.386.1312884859696; Tue, 09 Aug 2011 03:14:19 -0700 (PDT) Sender: adrian.chadd@gmail.com Received: by 10.151.26.14 with HTTP; Tue, 9 Aug 2011 03:14:19 -0700 (PDT) In-Reply-To: <7764247.20110809135323@serebryakov.spb.ru> References: <1151152206.20110808220720@serebryakov.spb.ru> <201108090829.18712.bschmidt@freebsd.org> <1681554189.20110809132747@serebryakov.spb.ru> <7764247.20110809135323@serebryakov.spb.ru> Date: Tue, 9 Aug 2011 18:14:19 +0800 X-Google-Sender-Auth: -YlUohOBzTjSHYQlS9bPmJogUzo Message-ID: From: Adrian Chadd To: Lev Serebryakov Content-Type: text/plain; charset=KOI8-R Content-Transfer-Encoding: quoted-printable Cc: freebsd-wireless@freebsd.org Subject: Re: Bad host-vased AP performace -- and qouple of questions about FreeBSD WiFi stack tuning X-BeenThere: freebsd-wireless@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: "Discussions of 802.11 stack, tools device driver development." List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 09 Aug 2011 10:14:21 -0000 txpower 15 is actually 15dBm. Ie, try "ifconfig wlan0 txpower 1.5" :-) Adrian 2011/8/9 Lev Serebryakov : > Hello, Adrian. > You wrote 9 =C1=D7=C7=D5=D3=D4=C1 2011 =C7., 13:35:52: > >> There's a dBm to mW chart. > =9AYou've forgot link or attache? > > =9A =9AI'm looking at: > =9Ahttp://en.wikipedia.org/wiki/DBm > > =9AAnd 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). > > =9AAnd "15" for iwn card is 32mW, which is not believable (too > low). > >> Don't forget antenna gain. > =9A9dBm or 10dBm in my case, oh my. So, result is ~30+10 =3D 40dBm =3D 10= W?! I don't > =9Aunderstand something here! > > -- > // Black Lion AKA Lev Serebryakov > >