[time-nuts] Ublox GPS board

Magnus Danielson magnus at rubidium.dyndns.org
Tue Dec 21 05:17:18 UTC 2010


On 12/20/2010 05:02 PM, John Green wrote:
> I recently bought 4 older UBLOX GPS boards on eBay for $15 with free
> shipping. I hooked one up to my 1992 and comparing it with the Z3801,
> I am seeing it jump all over the place. I am using the 10 MHz output
> from the 3801 to start and the 1 PPS from the UBLOX to stop. I will
> have to bring in a TBolt just to verify the test set up. Has anyone
> here ever made any measurements on the UBLOX TIM-LF-0-000? These are
> not timing grade, by the way. The spec. sheet says the accuracy of the
> time pulse is 50 nSec. If that is +/- 50, then what I am seeing might
> be OK.

I would let the low-frequency PPS act as start and the 10 MHz as stop, 
unless you want to measure the PPSes directly.

Cheers,
Magnus



More information about the time-nuts mailing list