[time-nuts] New timing receivers?
hmurray at megapathdsl.net
Mon Apr 28 03:43:44 UTC 2014
jim at jtmiller.com said:
> I spent some time reading the uBlox-6 documentation. I found the TIM-TP ubx
> message and format. I see that there is also the ability to feed back to the
> uBlox-6 time shift info for the PPS in 1ns increments.
> Does it make sense to feed the TIM-TP info back this way to provide
(I'm reading between the lines, so this may be totally wrong.)
The uBlox-6 has a free running osc. If it wasn't free running, it would be a
There is an adjustment for antenna cable length.
If you tweak the antenna length adjustment, you can make the sawtooth offset
be 0 at any particular sample. But then the osc will drift and the sawtooth
will tell you how much it has drifted.
> Or is an external delay line or TIC plus software the only way?
If it was as simple as you would like, the uBlox guys would have done it
These are my opinions. I hate spam.
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