> That sucks severely - NONE of the common units have the PPS output?!
>
> Barf.  Oh well.

        Many of them do, but it's still not meant for precision timekeeping and the
exact relationship between its PPS pulse edges and UTC's second boundaries
may not be precisely specified. It's not a good idea to use a GPS unit not
specifically made for timing as an NTP reference clock.

        Sorry to plug myself, but I offer a GPS timing unit that is made
specifically for timing use. It's $375 (quantity one) and more info is
available at http://www.gpsclock.com/ PPS output is specified as +/- 1 us of
UTC second boundary.

        DS



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