[time-nuts] Trimble Thunderbolt no longer determines the correct date

Mike Cook michael.cook at sfr.fr
Fri Jul 28 16:51:14 EDT 2017

> Le 28 juil. 2017 à 17:36, Dave B via time-nuts <time-nuts at febo.com> a écrit :
> Interesting.
> What about NTPD implementations, when using a TB as the reference time
> source?  Does that handle the week count roll over as well?  If that was
> added, from what version?

   Which driver are you using? Palisade? I had a look at that code and there is no correction that I can see.  So you will need to either find/write a patch, remove the refclock altogether or configure NTP to use just the 1PPS signal,  which won’t be affected, by using the ATOM driver. You will need to define a separate preferred source (internet for example) for naming the seconds. 

> I suspect I may have some updating to do!   I use a TB as a frequency
> ref' and local NTP/NTPD server reference.
> The local TB here is showing "week 1959" top left of LH's display window
> (Rev 5.01)
> Cheers.
> Dave G0WBX.
> ------------------------------------------------------------------------
> On 28/07/17 08:14, time-nuts-request at febo.com wrote:
>>> Well quite an unpleasant surprise. So after the 30th do the TBolts stop
>> Paul,
>> This topic has been covered a number of times over the years. Some time-nuts have even run TBolt's under GPS simulators to verify that the 10 MHz and 1PPS outputs will be fine. So apparently the only effect is that the date & time (in binary TSIP messages) are off by 1024 weeks. This rollover-related effect is by now a "common" issue with many GPS receivers.
>> The current version of Mark's Lady Heather program has code to detect this and fix it so you're good to go for the next 19.6 years.
>> /tvb
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