[time-nuts] Re: Can Ublox GPS NEO provide 10MHz signal?

[John Ackermann N8UR]

Hi Mauro --

Yes, the u-blox TIMEPULSE signal can be set for 10 MHz (and beyond that 
on new units).  However, the spectral quality of the output is 
horrendous because the receiver drops or adds pulses each second as 
needed to maintain the long-term frequency which creates lots of jitter. 
  So for any sort of analog application you need to have a clean-up loop 
(e.g., an XO/TCXO/OCXO stable enough to support a multi-second time 
constant at the desired stability) following it.

John
----

On 1/18/23 05:20, Mauro Fiacco via time-nuts wrote:
> Hi All,
> 
> I would like to drive a GPSDO from an off the shelf GPS receiver, like the
> Ublox NEO.
>  From the documentation, it seems that the TIMEPULSE pin can be configured
> from 0.25Hz to 10MHz. Is this correct? (the documentation is a bit
> confusing!)
> 
> Am I correct that this option (if indeed is possible) should be
> available on the "SparkFun GPS Breakout - NEO-M9N" board?
> 
> Many thanks,
> 
> Mauro
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