Furuno FAR-3230SW-BB, Installation Manual

Page: 21 / 169

1. INSTALLATION
1-7
1.1.3 How to assemble, mount the antenna unit for FAR-3330SW,
FAR-3230SW-BB
Installation location
If an S-band antenna unit ins installed 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 an-
tenna unit or, if relocation is not possible, reinforce the platform.
How to assemble the antenna unit
The antenna unit consists of the antenna radiator (w/antenna support) and the
antenna unit chassis, and they are packed separately. Fasten the antenna radiator to
the antenna unit chassis as follows:
1. Remove the protective waveguide cap
from the waveguide on the radiator brack-
et.
2. Put the radiator on the radiator bracket so
the guide pins of the antenna support fit in
the guide pin holes on the radiator brack-
et. (Orient the logo of the radiator to the
side with the bow mark on the bracket. If reversely oriented the radiator cannot be
set to the bracket.)
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.
Remarkable
vibration
(pitching)
Mounting
position
EXAMPLE
Mast for DF, etc.
Waveguide cap
Radiator
bracket
Antenna
chassis
Antenna radiator
Antenna unit chassis
Antenna support
Front
Bow Bow
Bow mark Bow mark
Guide pin holes