v240M – Marine Satellite Communication System
80
-3°
-2°
-1°
0°
1°
2°
3°
1 5 10 15 20 3025
Search1
(Gyro-Free
Search Pattern )
Revolution (AZ direction)
EL direction
A search pattern 1 or 3 initiates according to the existence of a gyrocompass input
and which GYRO TYPE is selected.
Search 1: a search pattern 1 automatically initiates when the ship’s heading
input does not exist / fails.The antenna will go to the relative azimuth
position 0°at the calculated elevation and search in the azimuth CCW direction
and search up + 0.5° & down -0.5° with a total 6 (±3°) in elevation. The search
cycle will repeat until the antenna receives a lock signal from the modem or the
DVB transponder of the target satellite is decoded by the antenna. If the desired
signal is found and is higher than the predened detect level, the ACU will then
initiate Search 3. However, although ACU initiates Search 3 with the detection of the
desired signal, the antenna will not initiate Search 3 pattern but go into TRACKING
mode immediately. If the detected signal is below the predened tracking threshold
level, the search 1 will repeat and start 3° away from the current position.
To Next Page
Loading...
Need help?
General
