MANUAL P/N 900000165 REV H
15
4
NTP80plus Connections
4.1
GPS Antenna Connections (GPS Version)
The antenna is connected to the BNC port marked Antenna on the rear of the NTP80. The
antenna connector is a BNC Socket (50 ohm) and its connections are;-
Inner: GPS Signal 1.6GHz (& +5v antenna amplifier power)
Outer: GPS Return.
4.2
GPS Head-End
A remote GPS head-end option is available where the GPS receiver and antenna are combined
at the antenna location. The NTP80plus is fed with a CAT 5 cable connection from the head-
end.
4.3
1 PPS
The 1 Pulse per second (1PPS) output is derived from the NTP80 internal clock. If you have a
requirement for a 1 PPS you may connect your equipment to this port.
The 1PPS has a positive going on-time edge, at a TTL level.
Note
The 1PPS output will be available from initial power on, although it should be noted until
the NTP80 has synchronised the 1 PPS will not be within the quoted accuracy specifications.
Upon synchronisation of the NTP80, the 1PPS will be accurate to the quoted specifications.
The 1 PPS connector is a BNC Socket (50 ohm) and its connections are:
Inner: 1 PPS, Positive going, on time edge, TTL level. (0v to +5v)
Outer: 1 PPS Return.
Summary of Contents for NTP80plus
Page 10: ...MANUAL P N 900000165 REV H 10 ...
