Antenna (Option) - Furuno DSC-60 Installation Manual

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Antenna (option)

Performance of this unit is directly related to the antenna installation. In general, the antenna
should be installed as high as possible on the boat, free from the influence of nearby antennas,
rigging and masts.
The antenna commonly used for the DSC-60 is a 6 m whip antenna (local supply), long wire or
optional whip of 2.6 m length with preamp unit (optional supply).
The antenna input on this unit is automatically protected against strong induction by a protective
circuit. For better performance, however, we recommended use of the preamp unit FAX-5.
Antenna cable (option)
Connect the antenna to the unit with any 50 ohm coaxial cable (RG-10U/Y or equivalent).
Connect the center conductor of the coaxial cable using the junction box (type: AJB1-1A, code
no.: 000-870-284, order from FURUNO).
Preamp unit (option)
The body of the preamp unit can be mounted two ways;
1. The bottom of the preamp unit is designed to accept a threaded extension mast of 1 inch
diameter. The pitch of the thread should be 14 threads per inch. To prevent undue flexing of
the mast in heavy winds, the mast should not be longer than 5 feet (1.5 m).
2. The side of the preamp unit has a molded channel so that it may be mounted directly to a
stub mast with two stainless steel hose clamps. Hose clamps must be arranged locally.
Screw the 2.6 m whip antenna tightly onto the preamp unit and waterproof the junction and other
exposed metallic parts with sealing compound (silicone rubber, putty, etc.).
Note that a wire antenna of 2 to 3 meters length may be used instead of the whip antenna.
Note: The preamp unit requires about 9 VDC power. See page 20.
AJB1-1A
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