[time-nuts] ✘NEO-M8N vs. NEO-M8T

Bob kb8tq kb8tq at n1k.org
Sun May 20 19:26:33 EDT 2018


The “big deal” features on the T series are the ability to do single satellite 
timing and the auto output of the sawtooth correction information. Cranking 
sawtooth correction into your data will move the line down most of the way 
to the “JL” line.


> On May 20, 2018, at 7:03 PM, Gary E. Miller <gem at rellim.com> wrote:
> Time-nuts!
> I have heard for a long time to use the u-blox Time Sync products, instead
> of the basic GPS products, for precisin time.
> So I ordered a NEO-M8T and compared it against a plain NEO-M8N.  Tests
> done using a TAPR-TICC and a JL GPSDO for reference.  All tests using the
> same antenna and 12 hours of data.
> The results were disappointing.  See attached.  For 8x the price all I
> see is a slightly flatter ADEV curve.
> The M8T also support raw data, so I can try to use it for RINEX files.
> ---------------------------------------------------------------------------
> Gary E. Miller Rellim 109 NW Wilmington Ave., Suite E, Bend, OR 97703
> 	gem at rellim.com  Tel:+1 541 382 8588
> 	    Veritas liberabit vos. -- Quid est veritas?
>    "If you can’t measure it, you can’t improve it." - Lord Kelvin
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