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Antenna unit
Connect the antenna unit cable to the ANT connector.
Ground
The display unit con-
tains several CPUs.
While they are oper-
ating, they radiate
noise, which can in-
terfere 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(option) type antenna units should
be grounded.
Note: Use a “closed” lug to make the ground connection at the dis-
play 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-018or GPA-018S, an antenna cable set of 30m or 50m is
available. Extension cable cannot be used with the GPA-017 or GPA-
018.
◆ Extension cable line-up
Fabricate the end of the antenna cable and attach the coaxial con-
nector. 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