[time-nuts] Newbie question about GPS

[Matthias Welwarsky]

On Montag, 2. März 2020 22:37:02 CET Björn wrote:
> Hi Mattias,
> 
> Then if you lock and control the 48MHz.  You can also control the 1PPS edge
> to the accuracy of the computed time...  add 1s drift and lock uncertainty.
> 
> Read the beginning of the Tbolt manual. The Tbolt lets it’s locked 10MHz
> tick the whole receiver.

Yep, you can do that. Any chance for getting that scheme to work with one of 
the stand-alone timing receivers?

> 
> /Björn
> 
> Sent from my iPhone
> 
> > On 2 Mar 2020, at 22:14, Matthias Welwarsky <time-nuts at welwarsky.de>
> > wrote:
> > 
> > On Montag, 2. März 2020 13:14:55 CET Anton Moehammad via time-nuts wrote:
> >> 2. In the UCenter or almost any software
> >> control for GPS module/receiver we can find data for next pps, why if the
> >> software can calculate the PPS should be they do not use it to adjust the
> >> PPS output so the PPS jitter is minimal ?
> > 
> > There are no clocks in a GPS receiver with picoseconds resolution and
> > everything the GPS outputs will be naturally restricted to its internal
> > clock granularity. The time pulse signal from a Ublox module can
> > therefore only be accurate to tens of nanoseconds (around 20ns assuming
> > an internal 48MHz clock). However, the time solution calculated by the
> > receiver will be much better. The quantization error reported in the TP5
> > message can simply be added to the timestamp of the received pulse to
> > calculate its true arrival.
> > 
> > BR,
> > Matthias
> > 
> >> _______________________________________________
> >> time-nuts mailing list -- time-nuts at lists.febo.com
> >> To unsubscribe, go to
> >> http://lists.febo.com/mailman/listinfo/time-nuts_lists.febo.com and
> >> follow
> >> the instructions there.
> > 
> > _______________________________________________
> > time-nuts mailing list -- time-nuts at lists.febo.com
> > To unsubscribe, go to
> > http://lists.febo.com/mailman/listinfo/time-nuts_lists.febo.com and
> > follow the instructions there.
> 
> _______________________________________________
> time-nuts mailing list -- time-nuts at lists.febo.com
> To unsubscribe, go to
> http://lists.febo.com/mailman/listinfo/time-nuts_lists.febo.com and follow
> the instructions there.