[hpsdr] Jackson Labs GSPTCXO 'News'

[Berndt Josef Wulf]

G'day,

what is the current status of the development for a timing reference
board (Khronos?)? There hasn't been much discussion nor any noticeable
updates on the Wiki for some time.

I've been successfully using the Jackson Labs' GPSTCXO in conjunction
with Excalibur as a timing reference for HPSDR and Hermes, via external
reference out port, using a breadboard interface design. It was hoped
that we eventually see a replacement for Excalibur that uses GPSDO
technology. 

73, Berndt
VK5ABN

On Thu, 2012-04-26 at 16:26 -0700, John Westmoreland wrote:
> ***** High Performance Software Defined Radio Discussion List *****
> 
> HPSDR,
> 
> 
> I have updated the Wiki Page with the following files provided by
> George 'Said' of Jackson Labs:
> 
> 
> http://openhpsdr.org/wiki/index.php?title=GPSTCXO
> Some File Updates:
> 
> PDF Schematic of EVB
> 
> GPSTCXO Eval Board Gerbers
> 
> GPSTCXO Eval Board Mechanical Dimensions
> 
> 
> 73's,
> John 
> AJ6BC
> 
> On Thu, Apr 26, 2012 at 10:40 AM, John Westmoreland
> <john at westmorelandengineering.com> wrote:
>         Open HPSDR,
>         
>         
>         Just some 'news' regarding the Jackson Labs GPSTCXO.
>         
>         
>         I have been able to calibrate Excalibur with the GPSTCXO with
>         J1 removed from Excalibur (since the JL EVB outputs to a
>         High-Z).
>         
>         
>         That seems to work OK.  There are a few errors in the docs -
>         like the module is 3.3V not 5V.  The EVB has a 5V to 3.3V
>         converter on it.  Also there is a 1PPS output on the EVB (just
>         some slight rework that isn't reflected in the docs nor the
>         schematic).
>         
>         
>         Said has given me updated files, schematic plus gerbers for
>         the EVB.  I will update the Wiki later today with links. 
>         
>         
>         Overall I think this looks like a good/great candidate
>         solution.  The console program provided by JL works fine plus
>         I downloaded GPS CON and that works fine as well.
>         
>         
>         If anyone else is interested in acquiring a unit, which
>         contains the module, antenna, EVB board, USB cable, and
>         software CD - please let me know and I will e-mail you the
>         information.
>         
>         
>         73's,
>         John
>         AJ6BC
> 
> 
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