Acom AOM 04AT User Manual page 35

User's Manual | ACOM 04AT | Remote Automatic Antenna Tuner and Switch
When you use ACOM 04AT with ACOM 2020S amplifier do not use antennas with SWR
above 2.5! Always observe section
Check if the antenna cables and grounding system of your radio station are installed as described in Section
1.9.1 Lightning protection when the tuner is installed in a building
Please, see
Figure 2-9 | Tuner bottom view with connectors
Next, connect the grounding terminal (Pos. 1) of the tuner labeled GROUND to the main grounding plate of
the radio station (see Point
After connecting the grounding terminal, connect the antenna feeders (up to 4 coaxial cables) to the
respective connectors (Pos. 2) ANTENNA 1 through ANTENNA 4 on the tuner.
Verify that the amplifier master power ON/OFF switch on the back panel is in the OFF position, and the plug
is pulled out of the mains socket.
Before connecting the coaxial cable from the tuner to the amplifier output, make sure
that the cable and amplifier are securely grounded to the grounding system of the radio
station. Using a voltmeter, check the cable coming from the tuner to verify there is no AC
or DC voltage above 12 V from the pin and the ring of the cable connector to the grounding
terminal of the amplifier and between the connector pin and ring!
Without powering up the amplifier, use a coaxial cable to connect the tuner input (Pos. 3) labeled 50Ω RF
+26 VDC POWER & CONTROL to the ACOM transistor amplifiers output labeled RF OUTPUT.
Besides RF power, the tuner will be supplied with DC power from the amplifier (+26 VDC with consumption
up to 25 W), and bidirectional control data (60 kHz FSK), all combined on the same cable.
October 2023
NOTICE
8.1.3 Maximum Allowed Input Power
in Appendix 1).
9)
DANGER
!
.
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S e c t i o n INSTALLATION | Page 35 of 88