[time-nuts] Low cost GPS module for < 100ns timestamping error

"Björn Gabrielsson" bg at lysator.liu.se
Mon May 12 13:57:35 UTC 2014

> On Mon, May 12, 2014 at 3:03 AM, Tony <tnuts at toneh.demon.co.uk> wrote:
>> Unfortunately they use way too much power - 800mW maximum compared to
>> 50mW
>> for a UBLOX MAX-7c which are around $15. It also is specified at 50ns
>> rms,
>> 99% < 100ns.  It appears that most, if not all, the timing type modules
>> are
>> higher power as well as more expensive; unless anyone has any better
>> suggestions it looks like I'll have to stick to navigation type modules.
> I think they use more power because a timing mode GPS is used at a fixed
> location and so is likely to have AC mains power available and if a backup
> battery is needed it can be a large gell cell type

More likely its lower power needs is because the uBlox tech is 10+ years
more recent than the old Motorola stuff.



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