98-175666-A
B-1
Appendix B
Dual antenna solution
B
This appendix has the following sections:
•
•
Installation of the dual antenna solution
•
Configuration of the dual antenna solution
•
Flow chart for installation of the dual antenna solution
B.1 Introduction
The SAILOR XTR Ka Dual antenna solution has the following features:
• Simple installation due to single cable antenna system.
• Both antennas share the same modem.
• Ensures maximum system uptime.
• Fully automatic switching to other VSAT antenna, no user intervention needed.
• Switching upon programmed blocking zones.
• Switching if tracking signal strength drops 4 dB below the signal strength in the idle
antenna.
• Switching if the ADU is malfunctioning.
• Configured using the built-in web server user interface.
B.2 Installation of the dual antenna solution
B.2.1 System overview
You can use the SAILOR XTR Ka in dual antenna mode with 2 ADUs, 2 BDUs and the dual-
antenna accessories kit. The kit consists of two 75 Ohm RF cables, an RF splitter and an RF
combiner plus a modem keyline splitter cable. In case one antenna enters a blocking zone,
the other antenna of the dual-antenna system takes over and the system continues
working.
There is a Master BDU and a Slave BDU. The VSAT modem is connected to and configured
in the Master BDU. The Slave BDU is configured as a slave unit, using a Master BDU as VSAT
profile. The slave BDU is connected with an Ethernet cable to the Master BDU from which it
gets all satellite information. You can use any LAN port as long as the Master and the Slave
are in the same IP subnet. The system switches from one antenna to the other based on the
programmed blocking zones in the two antennas and actual signal blockages from vessel
structures, cranes etc.