From owner-freebsd-wireless@FreeBSD.ORG Thu Aug 23 07:07:02 2012 Return-Path: Delivered-To: freebsd-wireless@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [69.147.83.52]) by hub.freebsd.org (Postfix) with ESMTP id 62D84106564A for ; Thu, 23 Aug 2012 07:07:02 +0000 (UTC) (envelope-from adrian.chadd@gmail.com) Received: from mail-pb0-f54.google.com (mail-pb0-f54.google.com [209.85.160.54]) by mx1.freebsd.org (Postfix) with ESMTP id 2FD268FC08 for ; Thu, 23 Aug 2012 07:07:01 +0000 (UTC) Received: by pbbrp2 with SMTP id rp2so827204pbb.13 for ; Thu, 23 Aug 2012 00:07:01 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=mime-version:sender:in-reply-to:references:date :x-google-sender-auth:message-id:subject:from:to:cc:content-type; bh=K8nxuprWYTc68j5KMSr6bupD7zklKbsEBn3ImM44ICg=; b=mVVfw55C/ECMxV+Xe2Wpt55aeYckY9UDx3uSwCKu3dYerWjFd+1U2saao8sQlNH1hi lvv8mIN1uaqpx+o98r1xTdIBorMEB4WTaCsiy3wFVBWNusLg8milEUJ4cthLNd6c71Py lXN3YKklFejwRWaoET2HgrhprFuEc3DbbvcrEhoDN2xjFLTc/CU9x7xgg41jMsqK5Ytu ZOaGi7vX91sKHKJrXGOfMIpN4193vYK4X0px6MVnLMnrsTXc1LO94IiuAJDIs9zhjeof 5nnIj2GFSvDLoc3RTTsicf/t1nrIU3iPqAkJdcfi6MnPdF/OsmSl+WLszWdQQP92fBHG 18Mg== MIME-Version: 1.0 Received: by 10.68.231.233 with SMTP id tj9mr2327637pbc.39.1345705621732; Thu, 23 Aug 2012 00:07:01 -0700 (PDT) Sender: adrian.chadd@gmail.com Received: by 10.68.36.106 with HTTP; Thu, 23 Aug 2012 00:07:01 -0700 (PDT) In-Reply-To: <475A4E02EFF4724A9E58F55A56AC13160661F137@APEVS1.ap.ci.root> References: <475A4E02EFF4724A9E58F55A56AC13160641D618@APEVS1.ap.ci.root> <475A4E02EFF4724A9E58F55A56AC13160661E6AC@APEVS1.ap.ci.root> <475A4E02EFF4724A9E58F55A56AC13160661F137@APEVS1.ap.ci.root> Date: Thu, 23 Aug 2012 00:07:01 -0700 X-Google-Sender-Auth: Gz04O-3HkSGI8-1XsFsfxF8ZDo4 Message-ID: From: Adrian Chadd To: "Wright, Brett" Content-Type: text/plain; charset=ISO-8859-1 Cc: freebsd-wireless@freebsd.org, Kim Culhan Subject: Re: Atheros DFS radar detection 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: Thu, 23 Aug 2012 07:07:02 -0000 On 22 August 2012 18:09, Wright, Brett wrote: > They appear to have no duration. I only get them while transferring data > (iperf). Right. What happens when you adjust prssi by itself then? >> It also means if the NF value is higher for some >> reason, the RSSI values will change and the parameters will also >> change. > Actually the noise floor seems to be settling around -87dBm on these > cards... Right. That's going to lower the RSSI values that the hardware reports/sees and muck things up a bit. Either there's a spur somewhere, the boards are noisy, or there's some external amplifier attached on the input side. I'll ask one of the baseband guys tomorrow and see what they think. This is a really old chip though. They may not remember. :-) Adrian