Acom 03AT Operating Manual page 6

hole. If you prefer a smaller hole, you should thread the whole cable length through
the wall, beginning from its bared end and leaving the connector in the room. In
such a case you would need only 8mm (5/16") for this cable and another hole of
7mm (9/32") diameter for the optic cable.
The coaxial cable needed for a connection between the remote unit and the station
is not supplied but you should foresee its installation, too (unless it has been
installed previously). Normally you will need a 11mm (7/16") diameter hole or 20mm
(25/32") should you want to thread the cable with the PL-259 connectors installed.
To avoid disaster, the AATU installation and connection to the grounding and to the
antenna should be carried out only in serene quiet and sunny weather, when no risk
for thunders or atmospheric electricity activity exists. Not only a direct lightning hit
but also nearby strokes, as well as electricity induced by storm-clouds or a dusty
wind can cause voltages in either the antenna or the cables you are installing, that
are dangerous for life!
Do not begin installing the AATU before you have prepared a proper and safe
lightning grounding installation! Never use the AATU unless it is grounded to
guard you against lightning strokes! Do not use casual ground connections!
Installation of the remote unit must be accomplished in the order described below, before you connect the RCU and
the cables to your station.
a) Mount the AATU installation console to the antenna mast at a height at least 80cm (2.6 feet). This is needed in
order that winter snow cannot reach the height of the unit. Use both U-bolts M6 and the fixing screw M6x70mm
(supplied) – see fig.2-1,a,b & 2-2,f,g. Do not miss the fixing screw that avoids turning the unit around the mast.
b) Place the remote unit on the installed console and orient it with the hood head upward and the connectors
downward (see fig.2-1 and 2-2). You may need an assistant for the next operation.
When outdoors installed, the unit must be positioned with its hood head upward,
and with the connectors and the cable glands – vertically down. Never install the
remote AATU unit inclined to the vertical for outdoors usage in order to prevent it
from precipitation-water leaking into the unit as this may lead to damage, not
covered by warranty!
Settle carefully the unit onto the console and align its four installation blind holes (M6 threaded – see fig.2-4) to the
corresponding console holes.
An assistant may be needed at this point to hold the unit steady while you screw in the four screws М6х16mm (fig.2-
1,c) loosely. Tighten them properly using a 5mm (0,2") Allan key.
After having finished the above mount operations please check the strength and reliability of the installation.
N O T E
W A R N I N G HIGH VOLTAGE!
W A R N I N G HIGH VOLTAGE!
C A U T I O N
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