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INSTALLATION ANTENNA INSTALLATION
4 - 6
PASSIVE ANTENNA (Wire Antenna)
If the vessel is large enough, install a long-wire or whip antenna of 6 meters or longer. If the
NAVTEX receiver board (option) is not incorporated, it is possible to share the antenna with an
all wave receiver by using an Antenna Multicoupler. Do not share the antenna with the
transmitter.
ACTIVE ANTENNA (Preamp Unit; option)
If your vessel is small and you can not provide space for such a long antenna, it is recommended
to install the preamp unit FAX-5 (or NX-5) and whip antenna of 2.6 meter (or 1.2 meter), respectively.
For 1.2 meter whip antenna, the taping is necessary (see page 4-17).
1. Clamp the Preamp Unit tightly on a stub
mast with to stainless steel hose clamps.
(Hose clamps must be arranged locally.)
2. Screw the whip antenna tightly onto the
Preamp Unit.
3. Secure the earth lead of the Preamp Unit to
the nearest grounding spot.
4. Waterproof
the antenna junction and other
exposed metallic parts with sealing compound
(silicone rubber, putty, etc).
Instead of using the whip antenna, an antenna wire
of 2 to 3 meter long may be connected as shown
right.
NOTE
Whip
Antenna
Spring
Washer
Hose
Clamp
Mast
Grouding Spot
Antenna Wire
Coupling
Nut
Wire Antenna
Fixture
Preamp Unit
I
f the Preamp Unit is installed, change the settings of switches (S1/S2) inside th
e
recorder unit to supply 9Vdc to the Preamp Unit. Refer to page 4-13.
I
f receiver sensitivity is insufficient on preamp unit-equipped sets, ground the preamp
unit referring to page C-1.