Garmin GPS 17x NMEA 2000 Installation Instructions - Page 4

EN Step 1: Mount the GPS 17x Antenna You can surface mount the GPS 17x antenna, attach it to a standard 1 in. OD pipe-threaded-pole marine mount (14 threads-per-inch-not included), or even install the antenna under fiberglass. Select a suitable location for the GPS 17x antenna on your boat. To ensure the best reception, mount the GPS 17x antenna in a location that has a clear, unobstructed view of the sky in all directions. • Avoid mounting the GPS 17x antenna where it is shaded by the superstructure of the boat, a radome antenna, or mast. EMI Better Best Good SS BARNETT EMI (Electromagnetic Interference) from engine components Above - best • On a sailboat, avoid mounting the GPS 17x antenna high on the mast, to prevent inaccurate speed readings caused by excessive heeling. • The GPS 17x antenna provides more-stable readings when located nearer to water level. Below - OK Radar 3 ft. (1 m) VHF Radio Antenna GPS 17x Placement Considerations • Mount the GPS 17x 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. Surface-mounting the GPS 17x Antenna 1 Use the surface-mount bracket as your mounting template. • Use a center punch to mark the three screw locations on the surface. • Use a pencil to trace the cable-hole in the center of the bracket. • Set the surface-mount bracket aside. Do not drill through the surface-mount bracket. 2. Drill the three 1 1/8 in. (3.2) pilot holes. Note: If you are mounting the GPS 17x on fiberglass, it is recommended to use a countersink bit to drill a clearance counterbore through the top gelcoat layer (but no deeper). This will help to avoid cracking in the gelcoat layer when the screws are tightened. 3. Use a 1 in. (25 mm) hole saw to cut the cable hole in the center. 4. Place the seal pad on the bottom of the surface-mount bracket. Make sure that the screw holes align. ➊ ➋ GPS 17x antenna 5. Use the included M4 screws to attach the surface-mount bracket to the mounting surface. 6. Route the NMEA 2000 cable through Surface-mount the 1 in. (25 mm) cable hole and bracket connect it to the GPS 17x. Seal pad 7. Make sure the large gasket is in Mounting place on the bottom of the GPS 17x surface antenna, place the antenna on the surface-mount bracket ➊, and twist it clockwise to lock it in place ➋. ➌ Rubber gasket 8. Secure the antenna to the mounting bracket with the included M3 set screw ➌. 9. Route the NMEA 2000 cable away from sources of electronic interference, and connect it to your NMEA 2000 network.  GPS 17x NMEA 2000 Installation Instructions