David J Taylor wrote:
"Richard B. Gilbert" <[email protected]> wrote in message
news:[email protected]...
[]
If you have a GPS timing receiver (different from navigation
receiver), with a PPS output, one edge of that pulse should be
accurate to within 50 nanoseconds. A serial output will tell you
which second is marked by the pulse.
.. although the very popular GPS 18x LVC specifies:
"Accuracy: Measurement Pulse Output Time: +/- 1 microsecond at [the]
rising edge of the pulse."
so not quite as good as 50 nanoseconds.
Cheers,
David
The difference is not significant unless you can somehow take advantage
of the greater accuracy! The difference in price between the Motorola
device whose specifications I was citing and the GPS 18x LVC is quite
significant; ISTR that I paid about $300 for mine. If I had to replace
it, I'd go with the GPS 18X LVC.
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