Intellian v240C, Installation And Operation Manual

Page: 78 / 177

v240C – Marine Satellite Communication System
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Search 3 pattern
Search 3: a search 3 pattern will automatically be initiated when AGC / SIG falls
below the current tracking level threshold value. If the desired signal is found and
above the predefined tracking level, the ACU will terminate Search 3 and go into
TRACKING Menu. A search pattern will automatically be initiated when AGC / SIG
falls below the current threshold setting (this indicates that satellite signal has been
lost). The search patterns are conducted in a two-axis pattern consisting of alternate
movements in azimuth (AZ) and elevation (EL) (like its forming an expanding square
indicated within the diagram below).
Search 1 antenna motion
Elevation
(EL) Range
0.5˚
Azimuth (AZ) Range
Target EL Angle 0°
Turn 1
Target EL Angle 0°
Turn 3
Target EL Angle + 0.5°
Turn 2
Target EL Angle - 0.5°
Turn 4