Furuno SC-120 manual Dgps antenna unit, Mounting the Dgps antenna

2. INSTALLATION

2.2.2DGPS antenna unit

Choose a mounting location for the DGPS antenna considering the points mentioned below. DPGS is not necessary for heading determination, however it can improve the accuracy of GPS position fixing

•Separate the DGPS antenna at least three meters from a radio antenna.

•Do not install the DGPS antenna within the radar beam.

1.Mount the DGPS antenna by one of the methods below.

•Screw it into a one-inch threaded pipe.

•Fasten it to a steel post (φ 35-φ90) with stainless steel hose clamps (local supply).

CAUTION

Ground the antenna to prevent receiving problems.

DGPS Antenna (preamp)

GR-800-SC-1-S

Whip Antenna

Spring Washer

50

Witt Threads (W25-14) Pitch: 1.8143 Qty: 14

Antenna cable

Hose

Clamp

Pipe f27.2

Ground to the ship’s body

as shown the right figure.

Post

(f35-f90)

Ground Wire (0.3 m)

Note: Screw the pipe into the preamp BEFORE mounting the pipe.

Tap M4 threads in mast. Fasten ground wire with an M4 screw.

Mounting onto a threaded pipe Mounting with hose clamps

Mounting the DGPS antenna

2.Set the spring washer to the whip antenna (local supply) and screw the whip antenna into the antenna housing. Coat the washer with silicone sealant to prevent loosening.

3.Drill a tapping hole in the post for an M4 screw and fasten the ground wire there.

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