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¡ 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.
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.