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User's Manual | ACOM 04AT | Remote Automatic Antenna Tuner and Switch
Check if the antenna cables and grounding system of your radio station are installed as described in Section
1.5.1 Lightning protection when the tuner is installed in a building
of the tuner labeled GROUND (see
) to the main grounding plate of the radio station (see Point
connectors
After connecting the grounding terminal, connect the antenna feeders (up to 4 coaxial cables) to the
respective connectors (Pos. 6) ANTENNA 1 through ANTENNA 4 on the tuner (see
and
to a desk
Figure 2-4 Tuner rear view with connectors
Without powering up the amplifier, use a coaxial cable to connect the tuner input (Pos. 7) labeled 50Ω RF
+26 VDC POWER & CONTROL (see
)
to the ACOM transistor amplifiers output labeled RF OUTPUT.
connectors
2.4. Installation and Connection for Outdoor Operation
The wall and tower mounting brackets, provided with your tuner, allow the tuner to be remotely mounted,
reducing losses, installation costs and installation complexity. This option should always be preferred if
applicable. Remote operation drastically reduces feedline losses, resulting from operating a mismatched
coaxial line, leaving only the inherent losses of the cable, operated in a source-feedline-load matched mode.
For installation and connection for indoor operation see Section
Connection for Indoor Operation
Before commencing tuner installation, carefully consider and map out the way the coaxial
cables run from the amplifier to the tuner and from the tuner to the antennas, as well as
the manner in which they will enter the shack.
To prevent accidents, tuner installation and connection to the grounding and antennas
should only be carried out in clear, quiet and sunny weather, when there is no danger of
lightning and static discharges.
Life threatening voltages and electrostatic charges may occur in the antenna and the
cables you install, both as a result of a direct lightning strike or by induction after a
lightning strike on adjacent objects, and may also be statically induced by charged clouds
or energized by dust storms!
May 2021
Figure 2-3 Securing the tuner to a desk
).
Figure 2-3 Securing the tuner to a desk
.
DANGER
. Next, connect the grounding terminal (Pos. 5)
and
Figure 2-4 Tuner rear view with
in Appendix 1).
9)
Figure 2-3 Securing the tuner
and
Figure 2-4 Tuner rear view with
2.3 Installation and
S e c t i o n INSTALLATION | Page 23 of 72
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