[time-nuts] Best GPS 1PPS Accuracy

[Brian Kirby]

I use TAC32 Plus with my Motorola M12+ receiver.  You can set TRAIM 
between 250 to 1000 nanoseconds.  Default is 500 nS.  I have had mine 
set at 250 nS for years and have not noticed any problems - but, that is 
a somewhat wide window.

Brian N4FMN

Randy Warner wrote:
> Said, 
>
> Based on what I have read from the Motorola side of things setting the
> limits down that low will be problematic due to the constant threat of
> spurious alarms. My concern would be that the "good" 1PPS time
> accuracies might suffer if the receiver is constantly cycling. If the
> software filters are not allowed to settle out between alarms and
> tossing SVs out of the solution you might get all sorts of erroneous
> stuff. I guess it would ultimately come down to how the receiver
> firmware was written. 
>
>
> Randy 
>
> ________________________________________________________________________
> _______________
>
> Hi guys,
>  
> "enough RAM" is a keyword here! Doing outlier detection using  i.e.
> median filters etc seems prudent...
>  
> Part of my question was if anyone had any experience with setting the
> TRAIM limits really tight, to say +-20 or +-50ns and let TRAIM do the
> work. I rather  have no pulses than bad pulses.
>  
> Thanks,
> Said
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