2
Screw the pole-mount adapter onto a standard 1 in. OD, 14
threads per inch, pipe-threaded pole (not included).
Do not overtighten the adapter on the pole.
3
Connect the cable to the antenna.
4
Place the antenna on the pole-mount adapter and twist it
clockwise to lock it in place.
5
Secure the antenna to the adapter with the included M3 set
screw
Â
.
6
With the antenna installed on the pole mount, fill the
remaining gap in the vertical cable slot with a marine sealant
(optional).
7
Attach the pole to the boat if it is not already attached.
8
Route the cable away from sources of electronic
interference.
Mounting the Antenna Under the Deck
NOTICE
Before attaching the under-deck mounting bracket to the
surface, verify the supplied screws will not penetrate the
surface. If the supplied screws are too long, you must purchase
surface-appropriate screws to complete the installation.
Before you permanently mount the antenna, you must test the
mounting location for correct operation (
Antenna Mounting
Considerations
).
Because the antenna cannot acquire signals through metal, it
must be mounted under a fiberglass surface only.
Even when mounted under fiberglass, mounting this antenna
below deck decreases SiriusXM signal reception. If you are
operating off-shore, an above-deck mounting location free of
obstructions is recommended.
1
Place the adhesive pads
À
on the under-deck mounting
bracket
Á
.
2
Place the antenna in the under-deck mounting bracket.
3
Adhere the under-deck mounting bracket to the mounting
surface.
4
Secure the under-deck mounting bracket to the mounting
surface with screws.
5
Connect the cable to the antenna
Â
.
6
Route the cable away from sources of electronic
interference.
NMEA 2000 Connection Considerations
The antenna connects to a NMEA 2000 network on your boat.
The NMEA 2000 network provides power to the antenna and
shares data with other NMEA 2000-compatible devices on the
network. The included NMEA 2000 cable and connector allow
you to connect the device to your existing NMEA 2000 network.
If you do not have an existing NMEA 2000 network on your
boat, you must create one.
If you are unfamiliar with NMEA 2000, you should read the
“NMEA 2000 Network Fundamentals” chapter of the
Technical
Reference for NMEA 2000 Products
. To download this
document, select
Manuals
on the product page for your device
at
www.garmin.com
.
Item
Description
À
GXM antenna
Á
Garmin device
Â
Ignition or in-line switch
Ã
NMEA 2000 power cable
Ä
12 Vdc power source
Å
Audio cable connection
Æ
NMEA 2000 drop cable
Ç
NMEA 2000 terminator or backbone cable
È
NMEA 2000 T-connector
É
NMEA 2000 terminator or backbone cable
Connecting the Audio Cable
If you have a subscription to SiriusXM radio, you must connect
the audio adapter cable to the antenna and to the stereo on
your boat. The adapter cable connects to the antenna using the
included NMEA 2000/audio cable.
1
Connect the audio adapter cable to the included NMEA
2000/audio cable and route it away from sources of electrical
interference.
2
Refer to the stereo owner's manual to identify the correct
audio input connectors.
3
Connect the audio adapter cable to your stereo.
3
