Furuno FR-8045, Installation Manual, Page: 10 / 48

1. HOW TO INSTALL THE SYSTEM
5
1.2 Antenna Unit Installation
How to select the location for the antenna unit
• The antenna unit is installed either on top of the wheelhouse or a platform on the
radar mast. Install the antenna unit where there is a good complete view. Any ob-
struction causes blind sectors. For example, a mast with a diameter smaller than
the horizontal beamwidth of the radiator causes only a small blind sector. A horizon-
tal spreader or crosstrees in the same horizontal plane creates a large obstruction.
Install the antenna unit above, or below a horizontal spreader or crosstrees.
• You cannot put the antenna unit where there is a completely clear view in all direc-
tions. Make sure you check for blind sectors on the radar screen after you have in-
stalled the radar.
• To reduce the electrical interference, do not run the signal cable near other electri-
cal equipment. Also do not run the cable in parallel to power cables.
• A magnetic compass gives error if the antenna unit is installed near the magnetic
compass. See SAFETY INSTRUCTIONS for the compass safe distances to prevent
the interference to a magnetic compass.
• Do not apply paint to the radiator aperture. The radar wave cannot be transmitted if
there is paint on the radiator.
• If this radar is installed on a large vessel, follow the points shown below:
• The length of the signal cable between the antenna unit and the display unit is
max. 30 m.
• The output from a funnel or exhaust vent decreases aerial performance and hot
gases can damage the radiator. The antenna unit must not be installed where the
temperature is more than 55°C.
• The antenna unit can be installed on the bridge, a common mast, or the radar mast.
(a) On bridge
(c) Radar mast
(b) Common mast