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=-1.4 required=5.0 tests=BAYES_00,DNS_FROM_AHBL_RHSBL, NO_REAL_NAME,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 u9RFsPZn022659 for ; Thu, 27 Oct 2016 17:54:25 +0200 Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1bzmx0-0003ED-RV for rs_out_1@blacksheep.org; Thu, 27 Oct 2016 16:50:42 +0100 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1bzmx0-0003E4-97 for rsgb_lf_group@blacksheep.org; Thu, 27 Oct 2016 16:50:42 +0100 Received: from resqmta-po-02v.sys.comcast.net ([2001:558:fe16:19:96:114:154:161]) by relay1.thorcom.net with esmtps (TLSv1.2:ECDHE-RSA-AES256-GCM-SHA384:256) (Exim 4.87) (envelope-from ) id 1bzmwx-00082U-Ho for rsgb_lf_group@blacksheep.org; Thu, 27 Oct 2016 16:50:41 +0100 Received: from resomta-po-20v.sys.comcast.net ([96.114.154.244]) by resqmta-po-02v.sys.comcast.net with SMTP id zmvrbtU3G1zBdzmwtb1d8r; Thu, 27 Oct 2016 15:50:35 +0000 X-DKIM-Result: Domain=comcast.net Result=Signature OK DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=comcast.net; s=q20140121; t=1477583435; bh=81PDedy6C1zbauYO/FJg2jMXP22R76VDV+QvE3mlUNY=; h=Received:Received:From:To:Subject:Date:Message-ID:MIME-Version: Content-Type; b=Ut4rZduDpYqm4VQnc6DBigwKPXOXNtFZflGreQMJoSBT4chsNEhI/IPXgMa98vovQ 4TJwsfAzqjNDGq1JonyllfFV1Y1tLGywTOpW1ct/4qSlzC5zJRlEB8P1bkuxiq6b4t Jd21spb/MvcIzjNBpl0aF/urz2jf1SrMcRWI6iftOsxdTTh8iHsppewQHeNCzsBfxt 82WKPG6JZDfKNbtG1Lcv8EB/1B4BTjSUHOt92GhMRlclVnBnngH+U4lHIyQpA7BMiF B1o0knVhcm7pbUT3IzjReMxPn2/N51gf7WnWCTQeeAsrRFcT45IyJMgom0FHfd2Gx6 lpxSfAKI1w4Kw== Received: from Owner ([IPv6:2601:141:0:bec5:4923:e0b6:1687:f994]) by resomta-po-20v.sys.comcast.net with SMTP id zmwqblvKBtFAnzmwrbnYnE; Thu, 27 Oct 2016 15:50:34 +0000 From: To: 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> In-Reply-To: Date: Thu, 27 Oct 2016 11:50:26 -0400 Message-ID: <055c01d23069$d6a6ca40$83f45ec0$@comcast.net> MIME-Version: 1.0 X-Mailer: Microsoft Outlook 14.0 Thread-Index: AQJCSQmwcJoZm+Ii8X/BmppHMnOUmAHsj2/hAkiqmgQCLxBjugHjxA+qAXWKgw0CI6nTQwK0pTGuAkcejkwBku9cHQHNc5+YAfgjvsABjw2SxgIatvLfAia91xqe/A4y4A== Content-Language: en-us X-CMAE-Envelope: MS4wfCqgXg6QzD8RK++xVL6b6tQ/C0yCiqCZE3Q84e2AGl6BTPGqrOULUQILPGc+LMnfmuUb6PJu994v2RFB5yGXq2K7Bu+yZpdEGNi5bsLemeptFZK+sqSy XD6AadDfQBGpiA+9bF6HZaKFBkKmr1+IM1g= X-Scan-Signature: 4b5b5ebe37a4c4f430f59bc35c1947b0 Subject: RE: LF: Idiot's guide to receiving Ebnaut? - Tutorial part2 Content-Type: text/plain; charset="utf-8" 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 Content-Transfer-Encoding: 8bit X-MIME-Autoconverted: from quoted-printable to 8bit by paranoid.lipkowski.org id u9RFsPZn022659 Content-Length: 1551 Status: O X-Status: X-Keywords: X-UID: 9258 Wolf, Thank you, I will capture per your suggestion some images (and rms measurements) of jitter between the Thunderbolt E and other GPSDOs at four or five time intervals in case this information is of interest to the group. Thank you also for the CMOS 4093 10 us monoflop /E-MU0202 information, and for any info on your prospective comparison with the 100ms Garmin pulse. Very grateful for the considerable benefits that SpecLab regularly provides. 73, Jim AA5BW -----Original Message----- From: owner-rsgb_lf_group@blacksheep.org [mailto:owner-rsgb_lf_group@blacksheep.org] On Behalf Of Wolfgang Büscher Sent: Wednesday, October 26, 2016 5:46 PM To: rsgb_lf_group@blacksheep.org Subject: Re: LF: Idiot's guide to receiving Ebnaut? - Tutorial part2 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 .