[time-nuts] Oscilloquartz Star-4 GPSDO (was: Thermal impact on OCXO)

Didier Juges shalimr9 at gmail.com
Sun Nov 27 00:04:32 EST 2016

Re: Manual uploads to my site:

I have limited internet access for another week. Uploads will be processed the week of December 5th.

Didier KO4BB

On November 19, 2016 7:05:52 PM GMT+01:00, Mark Sims <holrum at hotmail.com> wrote:
>There was a copy uploaded to EEVBLOG.   I uploaded it  and another one
>that Atilla found to ko4bb.com  I don't know if they are out of
>quarantine yet.
>The device does not provide any PPS/OSC info to plot (only a 0.03C res
>temperature reading).   You can set the PLL time constant,  satellite
>elevation mask,  enter manual holdover.    It does track SBAS
>satellites.  It also sees sat PRN 4,  which is not-active.
>The BG7TBL Star-4 GPSDO does not make the management interface
>available on the RS-232 connector.  I wired an external RS-232
>converter to the management port (he breaks out the 26-pin Star-4
>connector to pads).  I will probably re-wire his RS-232 signals (which
>are tapped off an internal Ublox serial interface) to the management
>port and get rid of my kludge.  His output normally sends out NMEA
>data, but once you talk to the management port, it switches to Ublox
>binary data.  Sending commands to the Ublox does not appear to do
>anything.  The BG7TBL device uses the ATDC version of the Star-4 which
>is the highest spec'd version.
>I may also bring out the Star-4 TOD (time of day) signal (which is a
>4800 BPS NMEA port) to the connector so NTP has something to get time
>messages from.
>> Are Oscilloquartz's Star-4 commands described somewhere? I can't find
>them in the wild...
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Sent from my Moto-X wireless tracker while I do other things.

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