Chapter 4 KGP-920
Installation
4-4
0093121662-08
4.6 Antenna unit installation
4.6.1 Selecting the best site of GPS / Beacon antenna
Make sure to install the antenna unit at a location where nothing shades the antenna of a view above
the horizon. Objects placed above the antenna unit or too close to the antenna unit may cause signal to
noise ratio to degrade and shorten measuring time.
(1) As far away from any metallic objects as possible.
(2) At least 4 meters (13.2 feet) away from the MF/HF reversed L-type TX antenna, VHF or HF whip
antenna.
(3) At least 1.5 meter (4.9 feet) above the MF/HF reversed L-type TX antenna.
(4) At least 1 meter (3.3 feet) away from the receiving antenna.
(5) Outside radar transmitting beam (30° to 40°).
(6) At least 1 meter (3.3 feet) away from the radar antenna.
(7) At least 5 meters (16.5 feet) away from the Inmarsat antenna.
(8) At least 3 meters (9.8 feet) away from the loop antenna.
(9) At least 0.5 meters (1.6 feet) above the large metal surface.
4 m (13.2 ft) or more 4 m (13.2 ft) or more
VHF whip antenna
LOOP antenna
1 m (3.3 ft)
3 m (9.8 ft) or more
Or more
Inmarsat antenna
Receiving antenna
HF whip antenna
4 m (13.2 ft) or
more
MF/HF reversed
L-type TX antenna
Main beam
Outside the radar beam
30
o
to 40
o
1.5 m (4.9 ft) or more
GPS / Beacon antenna
5 m (16.5 ft) or more
* AT least 0.5 m (1.6 ft) above the large metal surface
Figure. 4.4 Recommended GPS / Beacon Antenna installation