Retevis Ailunce HS4 - Page 5

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a) Antenna selection:
For the best signal radiation, a well-calibrated antenna length is ve impoant, on the other hand, there are other factors to be
considered: the size of the vehicle and its usual speed.
b) Mobile antenna:
-Must be xed to the vehicle where there is a maximum of metallic suace (ground plane) away from windscreen mountings.
-There are two types of antennas: Pre-Regulated Antenna which should be used on a good ground plane (e.g. car roof or lid of the
boot), and Adjustable Antenna which oers a much wider frequency range and can be used over a smaller ground plane. For an
antenna that must be xed by drilling, you will need a good contact between the antenna and the ground plane. To obtain this, you
should lightly scratch the suace where the screw and tightening star are to be placed.
-Be careful not to pinch or atten the coaxial cable (as this runs the risk of breakdown and/or sho-circuiting).
-Connect the antenna to location (B).
c) Fixed antenna:
A xed antenna should be installed in a predominant area, possibly emerging over the entire surrounding topography, including the
canopies of trees. Normally the antenna is raised and xed on the top of a mast. In some areas, especially urban ones, it may be
necessa to obsee the regulations in force in the specic region. To avoid unnecessa inconvenience, it is advisable to check this
matter with the authorities entrusted.
3. POWER CONNECTION ON THE CAR
Your radio is protected against an inversion of polarities. However, before switching it on, you are requested to check all the
connections. Your equipment must be supplied with a voltage of 12 volts DC(Direct Current). Today, most cars and trucks are negative
eah. You can check this by making sure that the negative terminal of the batte is connected either to the engine block or to the
chassis. If this is not the case, you should consult your dealer.
WARNING: trucks generally have two batteries to supply a voltage of 24 volts, in which case it will be necessa to inse a 24/12-volt
inveer into the electrical circuit. The following connection steps should be carried out with the power cable disconnected from the set.
a) Check whether the batte is 12 volts.
b) Locate the positive and negative terminals of the batte (+ is red and – is black). Should it be necessa to lengthen the power
cable, please use the same or a superior type of cable.
c) It is necessa to connect your radio to a permanent (+) and (-). We advise you to connect the power cable directly to the batte (as
the connection of the cable to the wiring of the car radio or other pas of the electrical circuit may, in some cases, increase the
possibilities of inteerence).
d) Connect the red wire (+) to the positive terminal of the batte and the black (-) wire to the negative terminal of the batte.
e) Connect the power cable to your radio.
WARNING: Never replace the original fuse (10A) by one of a dierent value.
4. BASIC OPERATIONS TO BE CARRIED OUT BEFORE USING
YOUR SET FOR THE FIRST TIME (without transmitting or using the <<Push-To-Talk>> switch on the microphone)
a) Connect the microphone
b) Check the antenna connections
c) Turn the set on by rotating the volume knob clockwise
d) Rotate the squelch knob to minimum
e) Adjust the volume to a comfoable level
f) Tune to channel 20 at the D bank by using either the UP or DN key on the microphone or the rota knob.