[time-nuts] Rollover: Thunderbolt

[Anders Wallin]

FWIW UNAVCO now lists some actual hardware models with issues/no-issues and
links to further material:
https://kb.unavco.org/kb/article/preparing-gps-gnss-receivers-and-hardware-for-the-april-6-2019-gps-week-number-rollover-wnro-867.html


On Sun, Mar 31, 2019 at 10:00 PM Bob kb8tq <kb8tq at n1k.org> wrote:

> Hi
>
> Pretty much all of the GPSDO’s on eBay are long past their “end of
> support” date. In a lot of cases, even
> when “in support” free updates were not available, even to OEM customers.
> The simple answer with the
> TBolt is to run it into something (like Lady Heather ) that understands
> what’s going on. The display software
> then corrects for the issue and (more or less) all is well.
>
> In some cases a manual “update the date” process will fix the problem.
> That generally holds as long as
> power to the unit is not lost. Once power cycles, you get to manually
> enter the date again. My preference
> is to let LH deal with this sort of stuff.
>
> In this case “all is well” includes that the TBolt keeps putting out a
> proper PPS at the top of each second.
> The 10 MHz is properly disciplined. What happens around a leap second is
> up to LH since the PPS really
> does not care about UTC / GPS time.
>
> Bob
>
> > On Mar 31, 2019, at 1:05 PM, John Reilly <reillyjf at comcast.net> wrote:
> >
> > I have an elderly Trimble Thunderbolt that I use primarily as a
> frequency reference. The date has never been correct (today, it reads Aug
> 15, 1999), which probably resulted from the last rollover. Should I
> anticipate any additional problems with the upcoming rollover?
> >
> > This Thunderbolt has Application software version 3.0, and GPS Core
> version 10.02. The Board serial number is 81737225, date of manufacture is
> 10/26/4. Are there updates that fix the date?
> >
> > Thanks,
> >   - John
> >
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