From mboxrd@z Thu Jan 1 00:00:00 1970 Return-path: Received: from mailout01.t-online.de ([194.25.134.80]:60721 "EHLO mailout01.t-online.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751324Ab1FJTT1 (ORCPT ); Fri, 10 Jun 2011 15:19:27 -0400 Message-ID: <4DF26E39.80701@t-online.de> (sfid-20110610_211937_551945_546761FA) Date: Fri, 10 Jun 2011 21:19:21 +0200 From: =?ISO-8859-1?Q?Richard_Sch=FCtz?= MIME-Version: 1.0 To: Daniel Halperin CC: linux-wireless@vger.kernel.org, wwguy , Stevie Trujillo Subject: Re: Fwd: iwlagn: is tx_power_device_lmt a regulatory limit or a hardware limit? References: <201105251813.36804.stevie.trujillo@gmail.com> <1306352560.20732.0.camel@wwguy-ubuntu> <201105252154.06204.stevie.trujillo@gmail.com> <1306376938.20732.2.camel@wwguy-ubuntu> <4DDE1458.9090004@t-online.de> <1306419109.20732.6.camel@wwguy-ubuntu> <4DF246D1.9000107@t-online.de> <1307727083.13397.57.camel@wwguy-huron> <4DF26175.2010506@t-online.de> In-Reply-To: Content-Type: text/plain; charset=ISO-8859-1; format=flowed Sender: linux-wireless-owner@vger.kernel.org List-ID: Am 10.06.2011 20:42, schrieb Daniel Halperin: > On Fri, Jun 10, 2011 at 11:24 AM, Richard Schütz wrote: >> >> According to [1] there are no countries that forbid tx power values lower than 20dBm in the 2.4 GHz band. The lowest value for the 5 GHz band listed is 17 dBm. So why are the Intel cards limited to 15dBm then for both bands? This value absolutely makes no sense in my view. >> >> [1] http://git.kernel.org/?p=linux/kernel/git/linville/wireless-regdb.git;a=blob;f=db.txt;hb=HEAD >> > > Are you forgetting to account for the 3 dBi--7 dBi antenna gain? > Dan We are talking about wireless devices that are primarily used in portable computers. These do not have directional antennas usually. So there should be almost no antenna gain in most cases. -- Regards, Richard Schütz