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GX1256S Page 11
4 INSTALLATION
4.1 LOCATION
The radio can be mounted at any angle. Choose a mounting location that:
• is far enough from any compass to avoid any deviation in compass
reading due to the speaker magnet
• provides accessibility to the front panel controls
• allows connection to a power source and an antenna
• has nearby space for installation of a microphone hanger
• the antenna must be mounted at least 3 feet from radio
4.2 ELECTRICAL CONNECTIONS
CAUTION
Reverse polarity connections will damage the radio!
Connect the power cord and antenna to the radio. Antenna and Power Sup-
ply connections are as follows (see Figure 1):
1. Mount the antenna at least 3 feet away from the radio. At the rear of the
radio, connect the antenna cable. It must have a PL259 connector. RG-
8/U coaxial cable must be used if the antenna is 25 feet or more from the
radio. RG58 cable can be used for distances less than 25 feet.
2. Connect the red power wire to a 13.8 VDC ±20% power source. Connect
the black power wire to a negative ground.
3. If an optional remote extension speaker is to be used, refer to section
4.3 for connections.
4. It is advisable to have a Certified Marine Technician check the power
output and the standing wave ratio of the antenna after installation.
Figure 1. General Installation
GPS Navigation Receiver
Accessory Cable
Optional Speaker
Antenna
Fuse
Red
Power Source
Black
Water proof
Deck Outlet