From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mout.perfora.net (mout.perfora.net [74.208.4.195]) by huchra.bufferbloat.net (Postfix) with ESMTP id 41DC220024C for ; Mon, 12 Mar 2012 19:29:53 -0700 (PDT) Received: from [192.168.83.5] (c-76-97-152-51.hsd1.ga.comcast.net [76.97.152.51]) by mrelay.perfora.net (node=mrus3) with ESMTP (Nemesis) id 0Lwrjc-1SQy8s3i1Y-016pVL; Mon, 12 Mar 2012 22:29:52 -0400 Message-ID: <4F5EB11D.8050207@c3energy.com> Date: Mon, 12 Mar 2012 22:29:49 -0400 From: "Ron Frazier (NTP)" User-Agent: Mozilla/5.0 (Windows; U; Windows NT 6.1; en-US; rv:1.9.1.9) Gecko/20100722 Eudora/3.0.4 MIME-Version: 1.0 CC: thumbgps-devel@lists.bufferbloat.net References: <20120312210345.GC17357@thyrsus.com> <20120312212608.GC17895@thyrsus.com> <20120312213946.GE17895@thyrsus.com> In-Reply-To: Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit X-Provags-ID: V02:K0:yq7NMUvRgISErNisot1KkrsDeAGoK184sY0XkT47jgl hvtQy/Elel4DBuoCFNUN+LgSxa945XHM0K1zU2Z8HuNdNwUs9Z 8hokky+k/gx5t3bJ3ofh56jiabl9t55XCiZE9ktfyB9rl1/JtK mo52m2P5C+9p+Y6KRA7ygiXfAy8M5/DgykZpUFAE2XXlZuZ2LV I/BSg/hwqn7iAGmXFAjb5FUeDEjvO5YYyL8clVDv2od5T8LV9P 03QQLMMba+1PVRrv7JFxIYf8ltT6z6TPEJSo/2S0F2rtYT1BRy unwrlivFHuJQQSXerpTwA4gyUtaCCp5q/5sHHWZ4fqqqcdR30O /QtVWK5Y+oWN+hA7Dqay+9skwFhpdsJGn6WcdHtFd Subject: Re: [Thumbgps-devel] Build vs. modify vs. what should we be doing anyway? X-BeenThere: thumbgps-devel@lists.bufferbloat.net X-Mailman-Version: 2.1.13 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 13 Mar 2012 02:29:53 -0000 Hi all, Regarding the sky view. Maybe you can route the RF from an external antenna, or even an amplified antenna, after disconnecting the patch antenna. I have a Globalsat BU-353 USB GPS, which is a Sirf III product. It happily runs inside in a residential wood framed home. It's 10 feet away from the nearest window. Except, it goes phycho every few days with large offsets for a few hours, then resumes normal operation. The point being, the chipset is very sensitive and the patch antenna can do a pretty good job. It would probably not work in a data closet in a commercial building. The other point being, if you set up an external antenna, you can put your logic board where ever you want. Sincerely, Ron On 3/12/2012 6:23 PM, tz wrote: > OK, it is a 2 sided board, but you would have to find the 1PPS pin > (and it looks hard to solder to), attach a wire and and route it > somewhere - it is a SiRF III so has the larger jitter. > > Since the GPS patch antenna is on the board, the board would have to > be in the sky view so you would have to run the PPS all the way to the > router if one of the pins isn't DCD, CTS or some other line. > > On Mon, Mar 12, 2012 at 6:10 PM, Patrick Maupin wrote: > >> On Mon, Mar 12, 2012 at 4:39 PM, Eric S. Raymond wrote: >> >>> Sorry, my eyes aren't educated enough. (I'm an ex-mathematician; what >>> relatively little I know about electronics design I've picked up by >>> osmosis doing software). What does it say? >>> >> It says: >> >> I am a very simple board. My major components are: >> >> - USB module >> - USB patch antenna >> - Small PL2303 clone (fitting in with your lawsuit theory) >> - Simple 5v -> 3.3v voltage regulator >> - Coin cell battery >> - Diode so as not to drain battery during operation >> - USB connector >> >> There is nothing there that would require 4 layers, and all the >> traces seem to "go somewhere". >> -- (PS - If you email me and don't get a quick response, don't be concerned. I get about 300 emails per day from alternate energy mailing lists and such. I don't always see new messages very quickly. If you need a reply and have not heard from me in 1 - 2 weeks, send your message again.) Ron Frazier timekeepingdude AT c3energy.com