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ENGLISH
4.7.a Power Supply
The transceiver power supply must be 12Vdc (see specifics in par. 14). The red cable must be
connected to the positive pin, the black to the negative pin.
Warning! A faulty connection may seriously damage the radio!!
The power cable is equipped with a protection fuse. If the fuse shorts, look for its reason
before substituting the cable with a new one of the same type and value. Never short-
circuit it, as this may damage the radio.
4.7.b GPS device
If your NEPTUNE transceiver is connected to a GPS resceiver, such as the GPS 200, you can
obtain and view NMEA information relative to the current position the vessel (latitude and longitu-
de) and the local time with respect to Greenwich Mean Time (GMT).
4.7.c Antenna
The antenna is an extremely important part of the device and noticeably influences the settings
of any telecommunications device. Contact your supplier regarding the antenna and request
advice about how to mount and best connect it to your transceiver.
Warning! Ensure the antenna is in perfect working order. It may otherwise seriously
damage the radio! A periodical measurement of the stationary waves is advised using a
suitable SWR metre.
5 BASIC OPERATION
5.1 Turning NEPTUNE on/off
To turn the transceiver on, rotate the OFF/VOLUME knob clockwise until it clicks on. You will
hear a beep (acoustic signal) and the LCD display will come on: the device is turned on to VHF
mode.
To turn the transceiver off, rotate the knob counter-clockwise until you hear further click: the LCD
display will turn off.
If your transceiver is not connected to a GPS resceiver, it is necessary to insert manually your
coordinates, otherwise an alarm will continue to sound. For further details, see par.7.1.
5.2 Volume regulation
Bring the OFF/VOLUME knob first to medium volume. Once the transceiver picks up a signal,
adjust the volume to a comfortable level. If no signal is picked up, use the squelch control as
described in the following paragraph and regulate the volume using background noise.
5.3 Squelch Regulation
Squelch is used to eliminate the annoying background noise you hear when no signal is being
picked up. If the squelch is adjusted correctly, there should be silence in between calls as well
as a reduction in battery consumption. To regulate squelch:
1. Rotate the SQ knob completely counter-clockwise until you hear background noise (if you don’t
hear anything, turn up the volume) and bring up RX on the LCD display.
2. If no signal is being received (only noise), slowly rotate the SQ knob clockwise, stopping as
soon as the noise and RX disappear stably.
