From owner-freebsd-mobile Tue Oct 22 8:47:35 2002 Delivered-To: freebsd-mobile@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id B531837B43F for ; Tue, 22 Oct 2002 08:47:33 -0700 (PDT) Received: from harmony.village.org (rover.bsdimp.com [204.144.255.66]) by mx1.FreeBSD.org (Postfix) with ESMTP id 260A343E6A for ; Tue, 22 Oct 2002 08:47:33 -0700 (PDT) (envelope-from imp@bsdimp.com) Received: from localhost (warner@rover2.village.org [10.0.0.1]) by harmony.village.org (8.12.3/8.12.3) with ESMTP id g9MFlTpk080437; Tue, 22 Oct 2002 09:47:30 -0600 (MDT) (envelope-from imp@bsdimp.com) Date: Tue, 22 Oct 2002 09:46:58 -0600 (MDT) Message-Id: <20021022.094658.104604595.imp@bsdimp.com> To: agapon@excite.com Cc: freebsd-mobile@FreeBSD.ORG Subject: Re: WMP11 and txpower From: "M. Warner Losh" In-Reply-To: <20021022111541.Q29633-100000@edge.foundation.invalid> References: <20021022111541.Q29633-100000@edge.foundation.invalid> X-Mailer: Mew version 2.1 on Emacs 21.2 / Mule 5.0 (SAKAKI) Mime-Version: 1.0 Content-Type: Text/Plain; charset=us-ascii Content-Transfer-Encoding: 7bit Sender: owner-freebsd-mobile@FreeBSD.ORG Precedence: bulk List-ID: List-Archive: (Web Archive) List-Help: (List Instructions) List-Subscribe: List-Unsubscribe: X-Loop: FreeBSD.org In message: <20021022111541.Q29633-100000@edge.foundation.invalid> Andriy Gapon writes: : From what I was able to find on the Internet, it seems to be possible to : control output power of WMP11. Is there any way to do this on FreeBSD ? : Linux (hostap?) driver control utility seems to have txpower option for : this purpose. In -current the kernel part of this are in the tree. The userland parts are in my tree, but haven't been committed yet. I'll be merging it into -stable soonish. Also, the Linux driver gets the power wrong. The numbers that you give it are pure fiction. It seems to think that these cards have 60dB of dynamic range, when the actual range is closer to 10-20dB. My cards seem to do about 100mW at max power, and about 5mW or 10mW at the low end, but these numbers are judged based on the link quality that we're seeing at the other end. 60dB of power control is pure fiction, since at the lowest power we're still transmitting power. Also, if you are looking to REDUCE power, you are likely OK. If you are looking to INCREASE power, you are putting yourself at risk of exceeding FCC spectrum regulations. This can result in very bad things happening to you if you are caught. Warner To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-mobile" in the body of the message