Looking around, it appears that Meinberg offer some PCIe cards nowadays
(rather than serial connected units) but I can't seem to find anyone who
has
configured these or similar as a stratum 0 source. They appear to offer
Windows and Linux drivers.
We are very satisfied with Meinberg GPS170PCI card on a PC with Centos7. I
tried several possible ways to use this card and I ended up at SHM refclock.
Using software temperature compensation the offset rms moves around 0.6
microseconds (see http://lxn.ujf.cas.cz/ntp/). Both computer and GPS170PCI
are several years old.
Karel
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