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vehicle vibrates. The car mounting bracket can be installed over or below the radio and
the radio may be inclined as desired according to the specific type of installation (under
dashboard or track cabin roof installation).
Installation of the main unit
Before connecting the radio to the vehicle electric system, please make sure the
radio is powered off with the OFF/VOL (6) knob completely turned anticlockwise at
OFF position. The DC power cable of the radio includes a fuse holder with fuse located
on the red positive (+) wire. Please connect the DC power cable to the vehicle electric
system with special attention to correct polarity, even if the radio is protected against
polarity inversion. Connect the red wire to the positive (+) pole and the black wire to
the negative (-) pole of the vehicle electric system. Please make sure that the wires and
terminals are firmly connected, to prevent cables from disconnecting or causing short
circuits.
Installation of the antenna
A specific mobile antenna adjusted for 27 MHz frequency range must be used. The
antenna installation must be done by a qualified technician or service centre. Please
install the antenna carefully on the vehicle with proper connection to ground. Before
connecting the antenna to the radio, it is necessary to check the correct operation of the
antenna with low standing wave ratio (S.W.R.) via adequate instruments. If not, the
transmitter circuit of the radio could be damaged. The antenna usually must be installed
on the highest part of the vehicle, free from obstacles and as far away as possible from
any source of electric or electromagnetic noise. The RF antenna coaxial cable must not
be damaged or pressed on its way between antenna and the radio. The correct operation
of the antenna and the low standing wave ratio (S.W.R.) must be checked periodically.
Connect the RF antenna coaxial cable to the antenna connector (15), located on the rear
side of the radio.
Checking operation of the radio
Once radio has been connected to the vehicle electric system and to the antenna, the
correct operation of the system should be checked. Please proceed as following:
1) Check that the power cable is correctly connected.
2) Check that the RF antenna coaxial cable is properly connected.
3) Connect the microphone to the connector (1) that is on the front side of the radio.
4) Rotate the SQUELCH (4) knob anticlockwise.
5) Turn radio on by the OFF/VOL (6) knob and adjust volume to the desired level.
6) Select the desired channel with the up/down key on the front side of the radio.
7) Rotate the SQUELCH (4) knob clockwise to cut the background noise.
8) Press the PTT key to transmit and release it to receive.