Alexandre Carrausse wrote:
"Wolfgang S. Rupprecht"
<[EMAIL PROTECTED]> wrote in
message news:[EMAIL PROTECTED]
If you are allowed to have fiber-optical signals go into the room (but
not out) you might be able to run a GPS in some not quite so secure
area and send only the NMEA and/or PPS into the secure area.
I agree but the link between the GPS antenna and the secure area will be
coper, not fiber.
Are you aware of a GPS solution that would use fiber?
If you are allowed to have a fiber optic link but not a copper link you
could run NTP over the fiber link! I'm not aware of any refclock that
uses a fiber optic output but if you can put a fiber optic Ethernet NIC
in a PC outside and a PC inside and connect the two. . . . If the
inside machine runs a firewall that only allows the NTP protocol to and
from port 123 only. . . . Fiber optic NIC's are rare and expensive but
there are, or were, such things.
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