User's Manual

Operation of more systems in the same area
Operation of more than one system in the same area is possible in the following situations:
•
Vessels have their own work sector and are not ’crossing’ each other. See below.
•
Vessels work in the same direction, but with different frequency pairs. See right.
In the diagram below, the beam sectors do not come within 10° of each other and no interference
will occur.
Installing a Fixed Station (Continued)
System 1 System 2
Frequency
pair
Frequency
Mobile
Station
(MHz)
Frequency
Fixed
Station
(MHz)
Frequency
pair
Frequency
Mobile
Station
(MHz)
Frequency
Fixed
Station
(MHz)
0 9200 9230 1 9300 9270
2 9230 9200 3 9270 9300
In the diagram to the right, the best combination of frequency pairs is pair 0 for system 1 and pair
1 for system 2, while these pairs give the largest difference between the frequencies of the Mobile
Stations.
To avoid influencing each other, the two Fixed Stations should be located at least two metres from
each other in the vertical plane and no more than six metres apart in the horizontal plane. The best
position for two Fixed Stations working in the same direction is above each other with at least two
metres difference in height.
Two vessels using Artemis systems in different sectors
Frequency separation of two Artemis systems
Mounting the Fixed Station
See Mounting the Mobile Station on page 16.
Closing the Vent
See Closing the Vent on page 17.
Connecting the Antenna Unit
See External Connections to an Artemis Sensor on page 15.
Two vessels using Artemis systems working in the same direction
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