From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-wm0-x229.google.com (mail-wm0-x229.google.com [IPv6:2a00:1450:400c:c09::229]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by lists.bufferbloat.net (Postfix) with ESMTPS id 8CBE43B315 for ; Fri, 19 Feb 2016 18:35:52 -0500 (EST) Received: by mail-wm0-x229.google.com with SMTP id a4so91190351wme.1 for ; Fri, 19 Feb 2016 15:35:52 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=broadcom.com; s=google; h=mime-version:in-reply-to:references:date:message-id:subject:from:to :cc:content-type; bh=oK4k1Ob+bjLVmYqFVWsQM5yLVaj2FWQD40UU9ZBJZYk=; b=P4I69vD0rxM6WdaG9emX9GJoTQO69sK8ZKaJs9HiotmpcroNQ6Kynx0Q0asP6nMRV7 BQRyifXf2cm4MpFiJEGWvsSXjlgYKQ27mq+r+WcJ+mVGMda+uRXCcUogKExCwkG+63SY 7UPrPt+KjAJ4LwcH4ZiZ0PQtmkdOMzLtcBvkY= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; h=x-gm-message-state:mime-version:in-reply-to:references:date :message-id:subject:from:to:cc:content-type; bh=oK4k1Ob+bjLVmYqFVWsQM5yLVaj2FWQD40UU9ZBJZYk=; b=ISz10i9u2UCn6V4c6jqAVxuHIM9fsVjNhIPP9BcF3gerHg79SaevCTwqgyqoS16M4H MV/VqkLRKMQoO2xoy39U078QHapzwzG+oRxWy/OlL6G5KkWYX9QqfePoeVhp0l05qgwO uB0aK2aUB2pAvl/FrMOFOD5zEuBr57cAcsuOQVMEKHbA+dUgmolQ5sX+qpRx38bBLTTc gQyHjx/3O0kHQs7d8QE+iGQj7B5FcrXjvAHSfGwzh9Ry2Jqv9+sIEwjkiXU3/WvuRE8l fOWmQu9oSZTSKqo0kVifC1nADy6zMiMxyLx+CW9xwkZAz3EqoLZrrxl/qCskoRiU3MCa 4M5A== X-Gm-Message-State: AG10YOQEW06JhIjVnMJZVhOIW/02RFBqYN9tIGc+PjY8NBzUKIjaY0BW/elrYI2dypL3voA1sGs5F0dHN+aUPAaw MIME-Version: 1.0 X-Received: by 10.28.104.87 with SMTP id d84mr448979wmc.56.1455924951351; Fri, 19 Feb 2016 15:35:51 -0800 (PST) Received: by 10.194.249.100 with HTTP; Fri, 19 Feb 2016 15:35:51 -0800 (PST) In-Reply-To: References: <56BF78C2.1050108@taht.net> Message-ID: From: Bob McMahon To: David Lang Cc: =?UTF-8?Q?Dave_T=C3=A4ht?= , make-wifi-fast@lists.bufferbloat.net, cerowrt-devel@lists.bufferbloat.net Content-Type: multipart/alternative; boundary=001a114b2f328c0fc7052c27f1f8 X-Mailman-Approved-At: Wed, 16 Mar 2016 11:41:57 -0400 Subject: Re: [Make-wifi-fast] It's hardware eval time again (basic hardware selection) X-BeenThere: make-wifi-fast@lists.bufferbloat.net X-Mailman-Version: 2.1.20 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Date: Fri, 19 Feb 2016 23:35:52 -0000 X-Original-Date: Fri, 19 Feb 2016 15:35:51 -0800 X-List-Received-Date: Fri, 19 Feb 2016 23:35:52 -0000 --001a114b2f328c0fc7052c27f1f8 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: quoted-printable Just an FYI for those testing wi-fi. Telemakus makes a combo attenuator (0-65 dB) and phase shifter (0-410 degree) that might be of interest. It's not shown on their web site http://wwww.telemakus.com so contact them directly if this is of interest. For traffic, iperf 2.0.8 has UDP end/end latency (+ more, including RTT/CWND) though assumes all the clocks are synched with something like PTP. A quality oscillator to act as PTP grandmaster helps much. I use a GPS disciplined TCXO but a free wheeling OCXO would work just as well. https://sourceforge.net/projects/iperf2/ Also, one may want to see if the wi-fi cards can provide phy chan information so one can plot magnitude/phase/condition numbers with something like gnu octave. This can help isolate any phy related issues particularly when calibrating a controlled environment. Bob On Fri, Feb 19, 2016 at 11:43 AM, David Lang wrote: > On Sat, 13 Feb 2016, Dave T=C3=A4ht wrote: > > I have an increasing desire to build (or buy if one exists) a couple >> boxes that can "aircap" packet capture across as many bands as possible, >> in these locations (and elsewhere, if people here are interested) >> > > while they won't do -ac, the wndr3800 is available for <$30 each on ebay, > you just need a remote disk to stream the capture data to. > > the number of channels you can listen to is limited to how many you want > to have running in a stack :-) > > David Lang > _______________________________________________ > Make-wifi-fast mailing list > Make-wifi-fast@lists.bufferbloat.net > https://lists.bufferbloat.net/listinfo/make-wifi-fast > > --001a114b2f328c0fc7052c27f1f8 Content-Type: text/html; charset=UTF-8 Content-Transfer-Encoding: quoted-printable
Just an FYI for those testing wi-fi.=C2=A0 Telemakus makes= a combo attenuator (0-65 dB) and phase shifter (0-410 degree) that might b= e of interest.=C2=A0 It's not shown on their web site =C2=A0http://wwww.telemakus.com = so contact them directly if this is of interest.

For tra= ffic, iperf 2.0.8 has UDP end/end latency (+ more, including RTT/CWND) thou= gh assumes all the clocks are synched with something like PTP.=C2=A0 A qual= ity oscillator to act as PTP grandmaster helps much.=C2=A0 I use a GPS disc= iplined TCXO but a free wheeling OCXO would work just as well. =C2=A0https://so= urceforge.net/projects/iperf2/ =C2=A0

Also,= one may want to see if the wi-fi cards can provide phy chan information so= one can plot magnitude/phase/condition numbers with something like gnu oct= ave.=C2=A0 This can help isolate any phy related issues particularly when c= alibrating a controlled environment.

Bob

On = Fri, Feb 19, 2016 at 11:43 AM, David Lang <david@lang.hm> wrote:=
On Sat, 13 Feb 2016, Da= ve T=C3=A4ht wrote:

I have an increasing desire to build (or buy if one exists) a couple
boxes that can "aircap" packet capture across as many bands as po= ssible,
in these locations (and elsewhere, if people here are interested)

 while they won't do -ac, the wndr3800 is available for <$30 each on = ebay, you just need a remote disk to stream the capture data to.

the number of channels you can listen to is limited to how many you want to= have running in a stack :-)=

David Lang
_______________________________________________=
Make-wifi-fast mailing list
Make-wifi-fast@list= s.bufferbloat.net
https://lists.bufferbloat.net/listinfo/make-wif= i-fast


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