Furuno 841, 821 manual Antenna Unit Installation

5. INSTALLATION

This chapter covers installation. Installation mainly consists of the following:

•siting and mounting the display unit and the antenna unit

•connection of the signal cable and the power cable

•establishing the ground

•connecting optional equipment, and

•adjustments.

NOTICE

The installation of this equipment requires certain electrical and mechanical skills. If the owner of the equipment has doubts about his or her technical abilities, we recommend that the equipment be installed by a qualified technician.

5.1 Antenna Unit Installation

Mounting considerations

When selecting a mounting location for the antenna unit keep in mind the following points.

•Install the unit on top of the wheelhouse or on the radar mast on an appropriate platform. It should be placed where there is a good all-round view with, as far as possible, no part of the ship’s superstruc- ture or rigging intercepting the scanning beam. Any obstruction will cause shadow and blind sectors.

•Locate the unit at least two meters away from a direction finder antenna to prevent interference to the direction finder.

•In order to minimize the chance of pick- ing 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 placed too close to the antenna unit. Ob- serve the minimum compass safe dis- tances to prevent deviation of a magnetic compass:

Table 5-1 Compass safe distances

Model	Standard	Steering
	compass	compass
821	1.7 m	1.4 m
841	1.4 m	1.1 m

•Typical mounting location for a sailboat and power boat are shown in Figure 5-1.

Figure 5-1 Typical antenna unit mounting

location for sailboat and power boat

29