Thanks, Chris. After three years of downtime and an extraordinarily
painful nanoBSD upgrade from version 4.x to 9.0, I'm just getting my
herd of Soekris 4501s running again and thought I might add a
Thunderbolt to the mix since I'm no longer going to be able to use
LORAN-C as one of my time sources. :-(
John
----
Chris Albertson said the following on 08/19/2012 01:26 PM:
On Sun, Aug 19, 2012 at 7:16 AM, John Ackermann N8UR <[email protected]
<mailto:[email protected]>> wrote:
The documentation at
http://www.eecis.udel.edu/~__mills/ntp/html/drivers/__driver29.html
<http://www.eecis.udel.edu/~mills/ntp/html/drivers/driver29.html>
indicates that support for the Trimble Thunderbolt GPSDO may be
incomplete, but the page was last updated in January, 2007.
Has anything been done since then to improve the Trimble support, or
are the problems noted there ones that don't affect normal
operation, such that I can plug the TBolt in and get good NTP
performance with the driver as-is?
I'm using the t-bolt. It seems to work. I guess there might be more
functions the driver could implement. Perhaps better support for
self-survey or logging or whatever. I'd like to see internal
temperature logged. But for normal NTP use it works fine.
If you only have one GPS the t-bolt is the one to have. But if you can
afford two there are lower priced GPSes that use less power that work
well with NTP. I have the t-bolt and two UT+ units.
Whatever you get make sure it is a TIMING gps. The Garmin units and the
Sure Electronic board at not timing GPS although they do have PPS
outputs. They work but they are "uSec" level devices. I'd look for
100ns or better.
Chris Albertson
Redondo Beach, California
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