<p dir="ltr">Hello Berndt,</p>
<p dir="ltr">The design is in layout - I have been busier than expected with my job and have had little time to devote to Khronos in the past months. But , that should change shortly and I will be able to finish this soon.</p>
<p dir="ltr">I have an updated block diagram - I probably should update the Wiki with that.</p>
<p dir="ltr">I got an Altium license during this time and have converted the design to Altium. I had started with OrCAD and Eagle.</p>
<p dir="ltr">Thanks for your e-mail.</p>
<p dir="ltr">73's,<br>
John<br>
AJ6BC</p>
<div class="gmail_quote">On Mar 25, 2013 8:39 AM, "Berndt Josef Wulf" <<a href="mailto:wulf@ping.net.au">wulf@ping.net.au</a>> wrote:<br type="attribution"><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
G'day,<br>
<br>
what is the current status of the development for a timing reference<br>
board (Khronos?)? There hasn't been much discussion nor any noticeable<br>
updates on the Wiki for some time.<br>
<br>
I've been successfully using the Jackson Labs' GPSTCXO in conjunction<br>
with Excalibur as a timing reference for HPSDR and Hermes, via external<br>
reference out port, using a breadboard interface design. It was hoped<br>
that we eventually see a replacement for Excalibur that uses GPSDO<br>
technology.<br>
<br>
73, Berndt<br>
VK5ABN<br>
<br>
On Thu, 2012-04-26 at 16:26 -0700, John Westmoreland wrote:<br>
> ***** High Performance Software Defined Radio Discussion List *****<br>
><br>
> HPSDR,<br>
><br>
><br>
> I have updated the Wiki Page with the following files provided by<br>
> George 'Said' of Jackson Labs:<br>
><br>
><br>
> <a href="http://openhpsdr.org/wiki/index.php?title=GPSTCXO" target="_blank">http://openhpsdr.org/wiki/index.php?title=GPSTCXO</a><br>
> Some File Updates:<br>
><br>
> PDF Schematic of EVB<br>
><br>
> GPSTCXO Eval Board Gerbers<br>
><br>
> GPSTCXO Eval Board Mechanical Dimensions<br>
><br>
><br>
> 73's,<br>
> John<br>
> AJ6BC<br>
><br>
> On Thu, Apr 26, 2012 at 10:40 AM, John Westmoreland<br>
> <<a href="mailto:john@westmorelandengineering.com">john@westmorelandengineering.com</a>> wrote:<br>
> Open HPSDR,<br>
><br>
><br>
> Just some 'news' regarding the Jackson Labs GPSTCXO.<br>
><br>
><br>
> I have been able to calibrate Excalibur with the GPSTCXO with<br>
> J1 removed from Excalibur (since the JL EVB outputs to a<br>
> High-Z).<br>
><br>
><br>
> That seems to work OK. There are a few errors in the docs -<br>
> like the module is 3.3V not 5V. The EVB has a 5V to 3.3V<br>
> converter on it. Also there is a 1PPS output on the EVB (just<br>
> some slight rework that isn't reflected in the docs nor the<br>
> schematic).<br>
><br>
><br>
> Said has given me updated files, schematic plus gerbers for<br>
> the EVB. I will update the Wiki later today with links.<br>
><br>
><br>
> Overall I think this looks like a good/great candidate<br>
> solution. The console program provided by JL works fine plus<br>
> I downloaded GPS CON and that works fine as well.<br>
><br>
><br>
> If anyone else is interested in acquiring a unit, which<br>
> contains the module, antenna, EVB board, USB cable, and<br>
> software CD - please let me know and I will e-mail you the<br>
> information.<br>
><br>
><br>
> 73's,<br>
> John<br>
> AJ6BC<br>
><br>
><br>
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<br>
<br>
</blockquote></div>