[time-nuts] Trimble Thunderbolt no longer determines the correct date
Mike Cook
michael.cook at sfr.fr
Fri Jul 28 20:51:14 UTC 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
>
> _______________________________________________
> time-nuts mailing list -- time-nuts at febo.com
> To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
> and follow the instructions there.
"The power of accurate observation is commonly called cynicism by those who have not got it. »
George Bernard Shaw
More information about the Time-nuts_lists.febo.com
mailing list