Operator's Manual

1. INSTALLATION
1-6
1.5 GPS Antenna
Install the GPS antenna unit referring to the outline drawing at the back of this manual.
When selecting a mounting location for the antenna, keep the following in mind:
• Select a location out of the radar and inmarsat beams. The radar beam will obstruct
or prevent reception of the GPS satellite signal.
• There should be no interfering object within the line-of-sight to the satellites. Objects
within line-of-sight to a satellite, for example, a mast, may block reception or prolong
acquisition time.
• Mount the antenna unit as high as possible to keep it free of interfering objects and
water spray, which can interrupt reception of GPS satellite signal if the water freez-
es.
• The location should be well away from a VHF antenna. VHF antenna emits harmon-
ic waves which can interfere with the GPS receiver.
How to extend the antenna cable
Use the cable type RG-10/UY (shipyard supply) to extend the antenna cable.
Note: The length of this cable should be less than 20 m to prevent signal loss. The
coax. coupling cable assy.(type: NJ-TP-3DXV-1, code no. 000-123-809), coaxial con-
nector (N-P-8DFB; supplied), vulcanizing tape and vinyl tape are required. Fabricate
both ends of the cable as shown in the figure below.
How to attach the connector N-P-8DSFA for cable 8D-FB-CV
CAUTION
Do not connect the GPS antenna connector to ground.
Short circuit can result.
5050
1515
3030
1010
Outer sheath
Cover with heat-shrink
tube or vinyl tape.
Inner
sheath
Braided
shield
Armor
Nut Washer Gasket
Clamp
Core
Core (Adjust
the length.)
Center pin
Fold back the shield. Remove the
shield that hangs over the gasket.
Center pin
(Soldering)
Apply solder to core.
Twist the shield and pass the clamp.
Set the shell to the cable then turn the nut to tighten.