25
GPS Network Time Server
TECHNICAL: 0118 965 6000
"IRIG" output
The major characteristics of these signals are:
Standardized time of day message:
•
Transmission
mode:
Series
link;
•
Transmission level:
0 dBm over 600 ? ;
•
Frequency carrier:
1 kHz ;
•
Repetition frequency:
1 s ;
•
Information content:
current date and time, from second to year;
•
Coding: amplitude
modulation,
0.317
ratio;
•
Synchronization:
identification bit of the synchronous start of
second
rollover.
Connectors:
•
Type:
BNC
female
receptacle.
"AUI" output
The AUI is used to connect the GPS Network Time Server to an Ethernet network at 10 MHz
and to broadcast over this network the time reference, in accordance with NTP V3
Recommendation.
Connecting this connector to the network prevents simultaneous connection to the 10BaseT
connector.
The output connector is a DB15 male receptacle.
The connection complies with the connection standard for matching to the physical layer of
an IEEE 802.3 network.
"10BaseT" output
The 10BaseT is used to connect the GPS Network Time Server to a shielded pair network at
10 MHz and to broadcast the time reference over this network in accordance with NTP V3
Recommendation.
Connecting this connector to the network prevents simultaneous connection to the AUI
connector.
The output connector is a RJ45 female receptacle.
The connection complies with the physical connection standard for shielded twisted pair per
IEEE 802.3.
