4
GDL 40 Installation Instructions
Mounting the Antenna with the Cable
Routed through the Pole
1. Select a mounting location for the
antenna, and verify correct operation at
the mounting location (
2. Temporarily position a standard marine
pole mount (not included) in the
mounting location you selected (
).
3. Mark the approximate center of the pole.
4. At the marked location, use a
3
/
4
in.
(19 mm) bit to drill a hole for the cable
to pass through.
5. Fasten the marine pole mount to the boat
(hardware not included).
6. Thread the pole-mount bracket
➊
onto
the marine pole mount.
Do not overtighten the bracket.
➋
➊
➌
7. Route a NMEA 2000 drop cable through
the pole-mount bracket and the pole, and
connect the cable to the antenna.
8. Place the antenna on the pole-mount
bracket, and twist it
➋
to lock it in
place.
9. Secure the antenna to the bracket with
the included M3 set screw
➌
.
10. Route the NMEA 2000 drop cable away
from sources of electronic interference.
11. Connect the antenna to your NMEA
).
12. After the antenna is installed on the pole
mount, fill the vertical cable slot with a
marine sealant (optional).
Mounting the Antenna under a
Surface
NOTICE
When choosing a location to install the
under-deck-mounting bracket, make sure
the included screws are not too long for
the surface thickness. If the screws are not
appropriate for the surface, you must supply
the correct length of M4 screws to avoid
damage to the top of the mounting surface.
The antenna can be mounted under a
fiberglass surface. Because the antenna has
difficulty acquiring cellular signals through
metal, it is recommended that you use the
under-deck mount under a fiberglass surface.
1. Identify the mounting location on the
fiberglass surface
➊
, and verify correct
operation at the mounting location
).
➌
➊
➋
➐
➎
➏
➍
2. Using the under-deck-mounting bracket
➋
as a template, mark three pilot-hole
locations
➌
on the surface.
3. Use a
1
/
8
in. (3.2 mm) bit to drill the
three marked pilot holes.
4. Place the antenna in the bracket, and
twist it clockwise to lock it in place.
5. Secure the antenna to the bracket with
the included M3 set screw
➍
.
6. Remove the backing from the adhesive
pads
➎
on the under-deck mounting
bracket.
7. Make sure that the bracket aligns with
the pilot holes, and adhere the under-
deck mounting bracket to the surface.
8. Using screws of the appropriate length,
fasten the bracket to the surface.
9. Connect a NMEA 2000 drop cable to the
antenna
➏
.
10. If you are using an external cellular
), connect it to the
GDL 40 antenna
➐
.