Return-Path: X-Spam-DCC: paranoid 1481; Body=2 Fuz1=2 Fuz2=2 X-Spam-Checker-Version: SpamAssassin 3.1.3 (2006-06-01) on lipkowski.org X-Spam-Level: X-Spam-Status: No, score=-0.7 required=5.0 tests=BAYES_00,DNS_FROM_AHBL_RHSBL, RATWARE_GECKO_BUILD,SPF_PASS autolearn=no version=3.1.3 Received: from post.thorcom.com (post.thorcom.com [195.171.43.25]) by paranoid.lipkowski.org (8.13.7/8.13.7) with ESMTP id u9QLriPb020224 for ; Wed, 26 Oct 2016 23:53:44 +0200 Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1bzW4h-00015i-06 for rs_out_1@blacksheep.org; Wed, 26 Oct 2016 22:49:31 +0100 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1bzW4N-00015Z-Uv for rsgb_lf_group@blacksheep.org; Wed, 26 Oct 2016 22:49:11 +0100 Received: from mout1.freenet.de ([2001:748:100:40::2:3]) by relay1.thorcom.net with esmtps (TLSv1.2:ECDHE-RSA-AES256-GCM-SHA384:256) (Exim 4.87) (envelope-from ) id 1bzW4L-0003fx-69 for rsgb_lf_group@blacksheep.org; Wed, 26 Oct 2016 22:49:10 +0100 Received: from [195.4.92.141] (helo=mjail1.freenet.de) by mout1.freenet.de with esmtpa (ID dl4yhf@freenet.de) (port 25) (Exim 4.85 #1) id 1bzW4H-0008T3-G8 for rsgb_lf_group@blacksheep.org; Wed, 26 Oct 2016 23:49:05 +0200 Received: from localhost ([::1]:34581 helo=mjail1.freenet.de) by mjail1.freenet.de with esmtpa (ID dl4yhf@freenet.de) (Exim 4.85 #1) id 1bzW4H-0002xN-BQ for rsgb_lf_group@blacksheep.org; Wed, 26 Oct 2016 23:49:05 +0200 Received: from mx17.freenet.de ([195.4.92.27]:38781) by mjail1.freenet.de with esmtpa (ID dl4yhf@freenet.de) (Exim 4.85 #1) id 1bzW1l-00028h-Ld for rsgb_lf_group@blacksheep.org; Wed, 26 Oct 2016 23:46:29 +0200 Received: from x4d025da5.dyn.telefonica.de ([77.2.93.165]:55253 helo=[192.168.178.26]) by mx17.freenet.de with esmtpsa (ID dl4yhf@freenet.de) (TLSv1.2:DHE-RSA-AES128-SHA:128) (port 587) (Exim 4.85 #1) id 1bzW1l-00074E-GQ for rsgb_lf_group@blacksheep.org; Wed, 26 Oct 2016 23:46:29 +0200 To: rsgb_lf_group@blacksheep.org References: <157b3bf43d2-111e-bfa3@webprd-a11.mail.aol.com> <0f1b59cf-e10d-1daf-125b-ad4aca471a06@gmail.com> <580205DC.80508@posteo.de> <58020BE2.1020107@posteo.de> <289454467.20161015210855@chriswilson.tv> <5808C23D.6060006@posteo.de> <580CE812.40500@posteo.de> <580CEA96.2010200@posteo.de> <4e343fa907bf9f2652ce9f25fe56d62a@smtp.hushmail.com> <580E12A9.9070309@posteo.de> <026a01d22e2e$883c9250$98b5b6f0$@comcast.net> <02d901d22e86$708649f0$5192ddd0$@comcast.net> From: =?UTF-8?Q?Wolfgang_B=c3=bcscher?= Message-ID: Date: Wed, 26 Oct 2016 23:46:28 +0200 User-Agent: Mozilla/5.0 (Windows NT 6.3; WOW64; rv:45.0) Gecko/20100101 Thunderbird/45.4.0 MIME-Version: 1.0 In-Reply-To: <02d901d22e86$708649f0$5192ddd0$@comcast.net> X-Originated-At: 77.2.93.165!55253 X-Scan-Signature: 87966b345956c8ef3389b993f6a18f4e Subject: Re: LF: Idiot's guide to receiving Ebnaut? - Tutorial part2 Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit X-SA-Exim-Scanned: Yes Sender: owner-rsgb_lf_group@blacksheep.org Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group X-SA-Exim-Rcpt-To: rs_out_1@blacksheep.org X-SA-Exim-Scanned: No; SAEximRunCond expanded to false X-Scanned-By: MIMEDefang 2.56 on 10.1.3.11 Status: O X-Status: X-Keywords: X-UID: 9244 Hello Jim, I wouldn't give up on the Thunderbolt E yet. A double-ovenned 10 MHz sounds intriguing, you should have a very low phase noise which other GPSes (clocked by a cheap 'computer grade' oscillator) cannot achieve. It will be interesting if you use the Thunderbolt to trigger a digital oscilloscope, and measure the PPS signal from the chinese unit at a resolution of a 10 ns or so. With a simple pulse-shaping network (CMOS 4093 wired as a crude 10 us monoflop), the pulse digitized with an E-MU0202 look good enough to be used as a timebase with SL. I will play with a modified algorithm, and see how it compares with the edge-interpolation on the 100 ms pulse from the Garmin - also at lower sampling rates (with sampling intervals longer than 10 us). Cheers, Wolf .