Marine GPS System User Manual

2-2
Antenna unit
Connect the antenna cable to the ANT connector.
Ground
The display unit contains several CPUs.
While they are operating, they radiate
noise, which can interfere with radio
equipment. Ground the unit to prevent
interference. The grounding wire should
be 1.25 sq or larger and as short as
possible. Connect the grounding wire
to ship's ground. On a fiberglass boat,
it is best to install a ground plate that measures about 20 cm by 30 cm on the
outside of the hull bottom to provide a ground point. If this is not practical, the
engine block can be used.
Also, the antenna unit GPA-018S type antenna units should be grounded.
Note: Use a “closed” lug to make the ground connection at the display unit. Do not
use an “open-type” lug ( ).
Extending antenna cable length
The standard cable is 10m long. For extension, in case of the GPA-016, GPA-
018S, GPA-019S an antenna cable set of 15m, 30m or 50m is available. Exten-
sion cable cannot be used with the GPA-017 or GPA-018.
◆ Extension cable line-up (in case of 30 m or 50 m)
Fabricate the end of the antenna cable and attach the co-
axial connector. Details are shown on next page.
Antenna Unit
GPA-016
GPA-018S
GPA-019S
1 m
Antenna Cable
30 m or 50 m 1 m
Fabricate locally. (See next page.)
To display unit
: Connector
Conversion
Cable Assy.
Figure 2-3 Cable extension
◆ Waterproofing connector
Wrap connector with vulcanizing tape and then vinyl tape.
Bind the tape end with cable-tie.
Figure 2-4 Waterproofing connector
Ground the equipment to
prevent electrical shock
and mutual interference.
CAUTION