From mboxrd@z Thu Jan 1 00:00:00 1970 Return-path: Received: from mail.candelatech.com ([208.74.158.172]:33947 "EHLO ns3.lanforge.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751824Ab2JERpD (ORCPT ); Fri, 5 Oct 2012 13:45:03 -0400 Message-ID: <506F1C99.6060404@candelatech.com> (sfid-20121005_194509_114035_968A9DA0) Date: Fri, 05 Oct 2012 10:44:57 -0700 From: Ben Greear MIME-Version: 1.0 To: Julian Calaby CC: "linux-wireless@vger.kernel.org" Subject: Re: Questions on direct-cabling 3x3 MIMO systems (ath9k) References: <506DDA1D.1090106@candelatech.com> <506E10B7.4060406@candelatech.com> <506E155E.3030405@candelatech.com> In-Reply-To: Content-Type: text/plain; charset=ISO-8859-1; format=flowed Sender: linux-wireless-owner@vger.kernel.org List-ID: On 10/04/2012 04:48 PM, Julian Calaby wrote: > Hi Ben, > >>> Pretty graphs are always useful. It'd be nice to compare other brands >>> / models of card too, but I'm guessing that's outside the scope of >>> what you're planning to achieve. >>> >>> Are you planning to open-source any of the software / hardware you're >>> making to do this? >> >> >> I'm going to publish the code for the attenuator (including >> eagle layout & gerber files for the Arduino shield). Will market them >> for sale as completed units too. Will publish a simple command-line >> tool to adjust the attenuation, and unit will have knobs to turn >> so you don't really need a computer to control it anyway. > > Nice! I wish I had a good reason to build one =) > >> We'll be able to test various APs..but on the client side, >> I doubt we'll test other than ath9k anytime soon, although >> I think our software would support other WiFi NICs if you didn't >> try to do any of the virtual interface stuff. > > Makes sense. Ok, here's a link that has some pics of the attenuator and a graph showing link speed, throughput rate, and rx-signal quality. I have lots more testing of various combinations, but plan to spend more time on automating it before I do much more manual testing. I'll not spam the list further with such links, but feel free to check back on my blog...I plan to post more results there as I get the time. http://bens-workshop.blogspot.com/2012/10/programmable-attenuator-arduino-shields.html If anyone else has any similar data, I'd love to see it posted somewhere. Thanks, Ben -- Ben Greear Candela Technologies Inc http://www.candelatech.com