Furuno 1942 Unpacking the antenna unit, Where the temperature is more than 70 C, Mounting Model

6. INSTALLATION

This chapter provides the procedures neces- sary for installation. Installation mainly con- sists of the following:

¡siting and mounting the display unit and antenna unit

¡connection of the signal cable and the power cable

¡establishing the ground

¡checking the installation, and

¡adjustments.

6.1 Antenna Unit Installation

Siting, handling considerations

¡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 rigging intercepting the scanning beam. Any obstruction will cause shadow and blind sectors. A mast for instance, with a diameter considerably less than the width of the radicator, will cause only a small blind sec- tor, 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 direction 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. (The method of determining blind and shadow sectors appears later in this chapter.)

¡If you have a radio direction finder on your boat, local its antenna clear of the antenna unit, to prevent interference to the direction finder. A separation of more than two meters is recommended.

¡To lessen the chance of picking up electri- cal interference, avoid where possible rout- ing the signal cable near other onboard electrical equipment. Also avoid running the cable in parallel with power cables.

¡The compass safe distance should be ob- served to prevent deviation of the magnetic compass.

Model	Standard compass	Steering compass
1832	0.9 m	0.7 m
1932	1.1 m	0.8 m
1942	1.0 m	0.74 m

¡Do not paint the radome (Model 1832) or radiator aperture (Model 1932, 1942), to ensure proper emission of the radar waves.

¡When this radar is to be installed on larger vessels, consider the following points:

(1)The signal cable run between the an- tenna and the display comes in lengths of 10 m, 15 m, 20 m and 30 m. What- ever length is used it must be unbro- ken; namely, no splicing allowed.

(2)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.

Mounting (Model 1832)

Figure 6-1 Typical antenna unit location

Unpacking the antenna unit

1.Open the antenna unit packing box care- fully.

2.Unbolt the four bolts at the base of the ra- dome to remove the radome cover.

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