Nera F33 User Manual page 46

SYSTEM DESCRIPTION
Antenna search pattern
Azimuth sweep
A 360° rotation of the antenna in azimuth at a fixed
elevation angle.
Hemispheric search
A hemispheric search is constituted by azimuth
sweeps at elevation angles 5°, 25°, 45°, 65° and 85°.
The antenna searches on the NCS Common TDM
channel frequency (NCSC), initiated by the Nera F33
Main Communication Unit (MCU).
When finding the satellite signal, it completes the
hemispheric search and moves to the position where
the strongest signal was detected.
The Antenna reports back to the MCU for verification
of valid NCSC.
If no valid signal is detected, no further automatic
action occurs until the MCU initiates a new search.
A search request from the MCU may contain channel
frequency and an order to make a full 360° search at
a specific elevation, calculated from map and GPS
information. If no satellite is found, a hemispheric
search will be performed.
Tracking
At the end of a search, Nera F33 performs a fine-
tuning of the antenna position around the strongest
detected signal. The fine-tuning is obtained by a
squinting function based on satlite signal quality.
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CONT D
Note! Nera F33 remembers the last used Ocean
Region when when switching the terminal off/on.
USER GUIDE
Nera F33