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 993A3200252 for ; Fri, 23 Mar 2012 23:38:39 -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 0LlUml-1SjqI71xRP-00adie; Sat, 24 Mar 2012 02:38:38 -0400 Message-ID: <4F6D6BEB.1070606@c3energy.com> Date: Sat, 24 Mar 2012 02:38:35 -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 To: questions@lists.ntp.org, "thumbgps-devel@lists.bufferbloat.net" References: <4F6CE652.2010309@c3energy.com> <4F6D285C.1070505@c3energy.com> <4F6D3E94.4080902@c3energy.com> In-Reply-To: <4F6D3E94.4080902@c3energy.com> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit X-Provags-ID: V02:K0:56zUPZPZGKgUBKkvWCF4ocb8saH1Z2JSwcZSK3s6jIo wlHheMTr8bb8+9O64Yzm7PeczD1gQfF6rrAwkhKSN5gMaOU3VQ MGWd9OSCTeTGE8DT1MRi3nvb2dNN0uvS1V8p3ZONE8klvg/U5N Ozg/ikplXZpR/Ms4LiwQBuM9wyb/HbGSADq8uP11C3sno5vtLt 9uCyhP4PAb2syGk/8QMFmIY2TkN1Pl0T7ExUsywYdY8WTZ4u8R bBKcIvhqQAOWfpwlsAo02W9uFdQDIReqliTfJY+UhARqkBpDkI 5ZKrTzj40oz7yrJ0iZNxL7kHMIRQYhkWqR6pvt2Nj4Fp3pFmDG A5+zIbZ952ziNXp5Sq6llam6vnFpf1//jzvksCzN3 Subject: Re: [Thumbgps-devel] YEA! My Sure Electronics GPS just arrived. 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: Sat, 24 Mar 2012 06:38:39 -0000 I now have the PPS circuit working on the Sure board. I have not soldered it yet. I just taped a jumper wire between the PPS test point at the edge of the board and the DCD pin 1 on the RS-232 port. The serial data is coming in through the Trendnet TU-S9 serial - USB converter, which is passing DCD. I'm getting + .5 / - 1.5 ms offsets. The PPS is nowhere to be seen on the statistics screen, but it is obviously working. I don't know why it's not more centered around zero, and maybe that will change. However, my total peak to peak range of offset variance is 2 ms, and that's coming through USB. If I can maintain that level of accuracy, and it's consistent with UTC, then I'm very happy. That's plenty good for my purposes. I still may try to run it through a real serial port on another machine just for kicks. Sincerely, Ron -- (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