Antenna Unit; Extending Antenna Cable Length; Extension Cable Line-Up; Waterproofing The Connector - Furuno GP-80 Installation Manual

3.

ANTENNA UNIT

Mounting
Install the antenna unit referring to the installation diagram on page D-4. When selecting a
mounting location for the antenna unit, keep in mind the following points.
Select a location out of the radar beam. The radar beam will obstruct or prevent reception
of the GPS satellite signal.
Be sure the location offers a clean line-of-sight to satellite. Objects within line-of-sight to
a satellite, for example, a mast or funnel, block reception and cause prolonged acquiring time
or interruption of position fix.
Mount the unit as high as possible. Mounting the antenna as high as possible keeps it free
of water spray, which can intercept reception of GPS satellite signal, if water spray is frozen.
The antenna unit GPA-018S must be grounded. Connect ground wire of 1.25 sq or larger
(local supply) between unit and a stainless steel screw fastened to the mast.

Extending Antenna Cable Length

The standard cable is 15m long. 30m and 50m long extension cable sets are optionally
available. See page 4.

!Extension cable line-up

Fabricate the end of antenna cable and attach the coaxial connector. Details are shown
on next page.
Antenna Unit
GPA-019S
GPA-018S GPA-017S
20cm

!Waterproofing the connector

Wrap connector with vulcanizing tape and then vinyl tape. Bind the tape end with
cable-tie.
Conversion
Cable Assy.
Antenna Cable
1 m
30 m or 50 m
Extension Cable Line-up
How to waterproof the antenna
: Connector
1 m
Fabricate locally. (See the next page.)
To display unit
3