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1. MOUNTING
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Installation precaution for S-band antenna unit
If an S-band antenna unit is mounted near the end of a platform to provide sufficient rotation
clearance for the radiator, the antenna unit, because of its weight, swings up and down by
ship’s vibration and rolling. This exerts excessive levels of stress at the base of the radiator,
which can damage the radiator. To prevent this, relocate the antenna unit, or if relocation is
not possible, reinforce the platform.
Mast for
DF, etc.
Mount the antenna unit
directly on the mast or on
the platform, as near as
possible to center of the
mast.
Mast for DF
Remarkable vibration
(pitching)
Mounting
position
EXAMPLE
Mounting precaution for S-band antenna unit