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Appendix B: Dual antenna solution
B-7
Configuration of the dual antenna solution
B.3.5
To make an OTC for dual antenna systems
Prerequisites
1. Make an azimuth calibration with both antenna systems (master and slave) using
manual azimuth calibration mode and one of the GX satellites,
Make sure you have
line-of-sight
..
2. Make a TX calibration for the master antenna system and for the slave antenna system.
The entire dual antenna system is now ready for OTC.
1. Turn on the modem
power.
The first time the modem is turned on it will perform an OTC both on the master and the
slave antennas. During this process the modem will restart several times before pointing
towards the satellite and establish the link.
2. Be patient. The OTC procedure will take at least 16 minutes.
3. If for some reason you make a TX cable calibration again, the system will request the
operator to initiate a manual OTC procedure. You can start the OTC procedure from the
modem dashboard.
Figure B-6: Dual-antenna mode, blocking zones — azimuth and elevation
1
2
3
1
3
2
Important
Do not power up the GMU at this point in time.
Important
Interrupting the process before it has completed will cause the process to
restart.
