Return-Path: Received: (qmail 20673 invoked from network); 14 Feb 2001 11:58:53 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by 10.226.25.101 with SMTP; 14 Feb 2001 11:58:53 -0000 Received: (qmail 13239 invoked from network); 14 Feb 2001 11:58:53 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 14 Feb 2001 11:58:53 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 14T0Ux-0001JS-00 for rsgb_lf_group-outgoing@blacksheep.org; Wed, 14 Feb 2001 11:53:27 +0000 X-Priority: 3 Received: from d12lmsgate-3.de.ibm.com ([195.212.91.201]) by post.thorcom.com with esmtp (Exim 3.16 #1) id 14T0Uq-0001JN-00 for rsgb_lf_group@blacksheep.org; Wed, 14 Feb 2001 11:53:21 +0000 X-MSMail-Priority: Normal Received: from d06relay02.portsmouth.uk.ibm.com (d06relay02.portsmouth.uk.ibm.com [9.166.84.148]) by d12lmsgate-3.de.ibm.com (1.0.0) with ESMTP id MAA26004 for ; Wed, 14 Feb 2001 12:50:52 +0100 Received: from usa.net (ss9.bld.socks.ibm.com [9.14.4.75]) by d06relay02.portsmouth.uk.ibm.com (8.8.8m3/NCO v4.95) with ESMTP id LAA174558 for ; Wed, 14 Feb 2001 11:50:32 GMT X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Message-ID: <3A8A70E9.241F523B@usa.net> Date: Wed, 14 Feb 2001 12:50:01 +0100 From: "Alberto di Bene" Organization: Undisclosed X-Mailer: Mozilla 4.76 [en] (Win95; U) X-Accept-Language: en MIME-Version: 1.0 To: rsgb_lf_group@blacksheep.org Subject: LF: Re: GPS-Disciplined BPSK References: <004301c09608$05ddca60$1b0d97d4@oemcomputer> Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 8bit Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Johan Bodin wrote: > > Another alternative is Motorola Oncore UT+ which was designed specifically > for timing applications. It has a "Site Survey" function which, if started, calculates > the average of 10000 position measurements and then enters "position hold mode". > When in position hold mode, it delivers accurate time with as little as one satellite > in view. The 1PPS output is specified to be within 50ns of "true time" (GPS time > or UTC, selectable) with SA on. Now that SA is gone, the accuracy is even better > (there is always a ~30ns sawtooth error due to finite resolution in the software/hardware). > [snip] I remember having read that the Oncore has been discontinued by Motorola. I have been suggested the following GPS OEM unit as a valid (or better) alternative when the primary interest is the 1PPS pulse : http://www.laipac.com/msg4.htm 73 Alberto I2PHD