OUTPUT RADIUS PATTERNS
2) ANTENNA INSTALLATION
a)
Choosing your antenna
- For radios, the longer the antenna, the better its results. Your dealer
will be able to help you with your choice of antenna.
b)
Mobile antenna
- Must be fixed to the vehicle where there is a maximum of metallic
surface (ground plane), away from windscreen mountings.
- If you already have a radio-telephone antenna installed, the PRESI-
DENT antenna should be higher than this.
- There are two types of antenna: pre-regulated which should be
used on a good ground plane (e.g. car roof or lid of the boot), and
adjustable which offer a much larger range and can be used on
a smaller ground plane
(see § 5 page 7,
Adjustment of SWR
)
.
- For an antenna which must be fixed by drilling, you will need a good
contact between the antenna and the ground plane. To obtain
this, you should lightly scratch the surface where the screw and
tightening star are to be placed.
- Be careful not to pinch or flatten the coaxial cable (as this runs the
risk of break down and/or short-circuiting).
- Connect the antenna (
B
).
c)
Fixed antenna:
- A fixed antenna should be installed in a clear a space as possible. If it is
fixed to a mast, it will perhaps be necessary to stay it, according to the
laws in force (you should seek professional advice). All PRESIDENT antennas
and accessories are designed to give maximum efficiency to each radio
within the range.
3) POWER CONNECTION
Your PRESIDENT JFK II A+ ASC is protected against an inversion
of polarities. However, before switching it on, you are advised to
check all the connections. Your equipment must be supplied with
a continued current of 12 volts (
A
). Today, most cars and lorries are
negative earth. You can check this by making sure that the negative
terminal of the battery 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 and an electrical
installation of 24 volts, in which case it will be necessary to insert a
24/12 volt converter (type CV 24/12 PRESIDENT) into the electrical
circuit. The following connection steps should be carried out with
the power cable disconnected from the set.
a)
Check that the battery is of 12 volts.
b)
Locate the positive and negative terminals of the battery (
+
is red
and
-
is black). Should it be necessary to lengthen the power cable,
you should use the same or a superior type of cable.
English
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