Garmin GXM 51 GXM 51 Installation Instructions - Page 2

Packing List, Accessories, and Tools Needed Before installing your unit, confirm that your package includes the following items. If any parts are missing, contact your Garmin dealer immediately. Standard Package • GXM 51 Antenna • Surface-mount bracket • Pole-mount bracket • Under-deck mount bracket • Mounting hardware (screws and adhesive pads) • NMEA 2000 T-connector • NMEA 2000/audio cable 19 ft., 8 in. (6 m) • Audio adapter cable 1 ft. (30.5 cm) • Installation instructions Optional Accessories • Additional NMEA 2000 network components • Audio adapter cable extensions Tools Needed • Drill • Drill bits-1/8 in. (3 mm) and 3/4 in. (19 mm) • Hole saw, 1 in. (25 mm)-surface-mount cable hole • Screwdriver-surface-mount screws • Pencil (to mark surface-mount pilot holes) • Countersink bit (when mounting on fiberglass) • Marine sealant (for some mounting options) Step 1: Mount the GXM 51 Antenna You can surface mount the GXM 51 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 GXM 51 antenna on your boat. To ensure the best reception, mount the GXM 51 antenna in a location that has a clear, unobstructed view of the sky in all directions. • Avoid mounting the GXM 51 antenna where it is shaded by the superstructure of the boat, a radome antenna, or a mast. EMI Better Best Good SS BARNETT EMI (Electromagnetic Interference) from engine components Above - best • On a sailboat, avoid mounting the GXM 51 antenna high on the mast. • The GXM 51 antenna provides more-stable reception when located nearer to water level. Below - OK Radar 3 ft. (1 m) VHF Radio Antenna GXM 51 Placement Considerations • Mount the GXM 51 antenna at least 3.3 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. After verifying correct operation, permanently mount the antenna.  GXM 51 Installation Instructions