Furuno 1834C-BB User Manual

 

•  The antenna unit is generally installed either on top of the wheelhouse or on the radar 

mast on a suitable platform. Locate the antenna unit where there is a good all-round 
view. Any obstruction will cause shadow and blind sectors. A mast for instance, with a 
diameter considerably less than the horizontal beamwidth of the radiator, will cause only 
a small blind sector, but a horizontal spreader or crosstrees in the same horizontal plane 
as the antenna unit would be a much more serious obstruction; you would need to place 
the antenna unit well above or below it. 

•  It is rarely possible to place the antenna unit where a completely clear view in all 

directions is available. Thus, you should determine the angular width and relative 
bearing of any shadow sectors for their influence on the radar at the first opportunity 
after fitting. 

•  To lessen the chance of picking up electrical interference, avoid where possible routing 

the signal cable near other onboard electrical equipment. Also avoid running the cable in 
parallel with power cables. 

•  A magnetic compass will be affected if the antenna unit is placed too close to it. Observe 

the compass safe distances mentioned in the SAFETY INSTRUCTIONS to prevent 
interference to a magnetic compass. 

•  Do not paint the radiator aperture, to ensure proper emission of the radar waves. 
•  When this radar is to be installed on larger vessels, consider the following points: 

•  The signal cable run between the antenna and the display units comes in lengths of 

10 m, 15 m, 20 m and 30 m. 

•  Deposits and fumes from a funnel or other exhaust vent can adversely affect the 

aerial performance and hot gases may distort the radiator portion. The antenna unit 
must not be mounted where the temperature is more than 70°C. 

As shown in the figure below, the antenna unit may be installed on the bridge, on a common 
mast or on the radar mast. 

(a) On bridge

(b) Common mast

(c) Radar mast