Return-Path: X-Spam-DCC: paranoid 1290; 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=-0.5 required=5.0 tests=BAYES_00,DNS_FROM_AHBL_RHSBL, FORGED_RCVD_HELO,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 u29E01bI002308 for ; Wed, 9 Mar 2016 15:00:01 +0100 Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1adeVO-0006CC-1t for rs_out_1@blacksheep.org; Wed, 09 Mar 2016 13:50:26 +0000 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1adeVN-0006C3-CW for rsgb_lf_group@blacksheep.org; Wed, 09 Mar 2016 13:50:25 +0000 Received: from brian.netcom.co.uk ([217.72.171.64]) by relay1.thorcom.net with esmtp (Exim 4.86) (envelope-from ) id 1adeVJ-0003G6-HK for rsgb_lf_group@blacksheep.org; Wed, 09 Mar 2016 13:50:24 +0000 Received: from sb.abelian.org (i-194-106-52-83.freedom2surf.net [194.106.52.83]) by brian.netcom.co.uk (Postfix) with ESMTP id 3007D32008C for ; Wed, 9 Mar 2016 13:03:40 +0000 (GMT) Received: from [127.0.0.1] (localhost [127.0.0.1]) by sb.abelian.org (Postfix) with ESMTP id C802B28A0451 for ; Wed, 9 Mar 2016 13:50:19 +0000 (UTC) Message-ID: <56E02A1B.9020309@abelian.org> Date: Wed, 09 Mar 2016 13:50:19 +0000 From: Paul Nicholson User-Agent: Mozilla/5.0 (X11; Linux i686; rv:17.0) Gecko/20130329 Thunderbird/17.0.5 MIME-Version: 1.0 To: rsgb_lf_group@blacksheep.org X-Scan-Signature: f38d515a9cad1e977fcfe251941a8120 Subject: LF: Another GPSDO Content-Type: text/plain; charset=ISO-8859-1; 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: 7269 I received one of these from China, http://www.ebay.co.uk/itm/GPS-DISCiPLINED-CLOCK-GPSDO-10MHz-10M-OUTPUT-SQUARE-WAVE-RS232-OUTPUT-GPS-NMEA-s-/252011014153 and it works nicely. The GPS is a U-Blox NEO-6M, https://www.u-blox.com/en/product/neo-6-series The NEO-6 series doesn't do GLONASS, only GPS. The OCXO is an Oscilloquartz 8663-XS which apparently is quite a good one. RS232 (DCE: tx on pin 2) outputs NMEA at 9600 baud and has a PPS on CTS pin 8 which is detected by gpsd and used by ntpd. PPS width is 100mS. The device can probably be switched to U-blox binary protocol for more info and better control but I haven't tried that. 10MHz output is vaguely square, 4.5V peak. I bought from the cheapest listing on Ebay and it came with an active antenna with a good cable length but it seems a little deaf compared to other antennas I have. Power required is 12VDC 15W and the PSU supplied doesn't fit UK mains sockets and in any case is only rated 1A. Under test with gpsd -D5 http://abelian.org/vlf/tmp/160309a.gif -- Paul Nicholson --