Operation Manual

b) internal and external

speakers

c) external speakers only

9.7. Antenna Connection and Earthing

The antenna socket is designed to be fitted to a coaxial cable

connection with a BNC plug and impedance of 50:. No

provision has been made for the connection of high impedance,

unshielded antennæ.

The reception quality depends, to a high degree, on the quality

of the antenna used. A good antenna guarantees good

reception.

We recommend the use of a well-tuned passive antenna or a

high performance active antenna. Cheap active antennæ do

not provide the desired results due to bad cross-modulation

characteristics.

Long wire antenna (e.g. on the back-stay) should be used in

connection with an impedance matching balun transformer.

Important for good reception is of course good earthing of the

ship's power supply and the FMD55. An adequately dimensioned

grounding sponge and properly matched antenna will result in

optimum performance.

For installation recommendations, see the following pages: