Furuno GP-31, Руководство оператора

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9-1
9. INSTALLATION
9.2 Installation of Antenna Unit
Mounting considerations
Install the antenna unit referring to the an-
tenna installation diagram at the end of this
manual. When selecting a mounting loca-
tion for the antenna unit, keep in mind the
following points:
• Do not shorten the antenna cable.
• Select a location out of the radar beam.
The radar beam will obstruct or prevent
reception of the GPS signal.
• The location should be well away from a
VHF/UHF antenna. A GPS receiver is in-
terfered by a harmonic wave of a VHF/
UHF antenna.
• There should be no interfering object
within the line-of-sight to the satellites.
Objects within line-of-sight to a satellite,
for example, a mast, may block recep-
tion or prolong acquisition time.
• Mount the antenna unit as high as pos-
sible. Mounting the antenna unit as high
as possible keeps it free of interfering
objects and water spray, which can in-
terrupt reception of GPS satellite signal
if the water freezes.
• The length of the whip antenna for the
GPA-018 (for GP-36) should be no
longer than 1.2 meter to prevent antenna
damage. Do not use a 2.5 meter whip
antenna.
• If the antenna cable is to be passed
through a hole which is not large enough
to pass the connector, you may unfas-
ten the connector with a needle nose
pliers and 3/8-inch open-end wrench.
Refasten it as shown in Figure 9-2, after
running the cable through the hole.
Center pin (soldered)
Clamp nut
Connector shell
Gasket (reddish brown)
Washer
Shield
Figure 9-2 How to assemble the connector
9.1 Installation of Display Unit
Mounting considerations
The display unit can be installed on a table-
top, on the overhead, or in a panel (optional
flush mounting kit required). Refer to the
outline drawings at the end of this manual
for installation instructions. When selecting
a mounting location, keep in mind the fol-
lowing points:
• Locate the unit away from exhaust pipes
and vents.
• The mounting location should be well
ventilated.
• Mount the unit where shock and vibra-
tion are minimal.
• Locate the unit away from equipment
which generates electromagnetic fields
such as a motor or generator.
• Allow sufficient maintenance space at
the sides and rear of the unit and leave
sufficient slack in cables, to facilitate
maintenance and servicing.
• Observe the following compass safe dis-
tances to prevent deviation of a magnetic
compass. Standard compass, 0.5 m,
Steering compass, 0.3 m.
Tabletop and overhead mounting
Tabletop Overhead
Figure 9-1 Tabletop and overhead
mounting methods
Flush mounting
There are two types of flush mounting kits.
For details, see the outline drawings at the
end of this manual for details.