[hpsdr] Jackson Labs GSPTCXO 'News'

[John Westmoreland]

Hello Berndt,

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.

I have an updated block diagram - I probably should update the Wiki with
that.

I got an Altium license during this time and have converted the design to
Altium.  I had started with OrCAD and Eagle.

Thanks for your e-mail.

73's,
John
AJ6BC
On Mar 25, 2013 8:39 AM, "Berndt Josef Wulf" <wulf at ping.net.au> wrote:

> 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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>
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