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Garmin GPSMAP 4008 - Marine GPS Receiver 取付説明書
You have one of two types of GPS antennas in your product box. Use the illustrations to identify the included antenna and follow the correct
installation procedures.
GPS 17
•
Can be surface mounted or pole mounted. See
•
Uses a separate template for surface mounting. See
•
Connects to the chartplotter using NMEA 0183. See
CAutIoN: Be sure to follow the correct mounting directions and the correct wiring directions for the antenna included with your chartplotter.

Choosing a location for the GPS antenna

You can surface mount the GPS 17 and GPS 17x antennas, attach them to a standard 1 in. OD pipe-threaded-pole marine mount (14 threads-
per-inch—not included), or even install a GPS 17x antenna under fiberglass.
Select a suitable location for the GPS antenna on your boat. To ensure the best reception,
mount the GPS antenna in a location that has a clear, unobstructed view of the sky in all
directions.
•
Avoid mounting the GPS antenna where it is shaded by the superstructure of the boat, a
radome antenna, or mast.
•
On a sailboat, avoid mounting the GPS antenna high on the mast, to prevent inaccurate
speed readings caused by excessive heeling.
•
The GPS antenna provides more-stable readings when located nearer to water level.
Mount the GPS antenna at least 3 ft. (1 m) away from (preferably above) the path of
•
any radar beam or a VHF radio antenna.
•
Temporarily secure the antenna in the preferred mounting location and test it for correct
operation. If you experience interference with other electronics, try a different location.
When you verify correct operation, permanently mount the antenna.
GPSMAP 4000/5000 Series Installation Instructions

Mounting the GPS Antenna

GPS 17x
page
6.
•
page
23.
•
page
9.
•
Can be surface mounted, pole mounted, or mounted under a
fiberglass surface. See
page
Does not use a separate template for surface mounting. See
Connects to the chartplotter using NMEA 2000. See
EMI
EMI
EMI (Electromagnetic Interference)
EMI (Electromagnetic Interference)
Above - best
Above - best
GPS 17x Placement Considerations
GPS 17x Placement Considerations
7.
page
Better
Better
Good
Good
from engine components
from engine components
Below - OK
Below - OK
Radar
Radar
VHF Radio Antenna
VHF Radio Antenna
page
7.
10.
Best
Best
ft.
ft.
(1 m)
(1 m)
5