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User's Manual | ACOM 04AT | Remote Automatic Antenna Tuner and Switch
8.1.5. Antenna Outputs Characteristics, Antenna 1 to Antenna 4
Rated impedance: 50 Ohm unbalanced;
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Maximum antenna output SWR: 3:1 (up to 10:1 with RF power limitations (see Section
•
Maximum Allowed Input Power
Output connectors type: UHF/PTFE (SO-239A) - 4 pcs.
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8.1.6. Full Tuning Duration (Basic Cycle)
Basic cycle for preparation of user full tuning settings, with automatic storage in the non-volatile memory:
In the range of 1.8 to 10 MHz: No more than 5 seconds (2-3 seconds typically);
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In the range of 10 to 54 MHz: No more than 3 seconds (1-2 seconds typically).
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8.1.7. Input Signal Needed to Prepare User Tuning Settings
Non-modulated carrier power 25 W +3/-3 dB (12.5 to 50 W).
8.1.8. Power Supply
+26 VDC +10/-15%, consumption of 25 W at most;
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Supplied by an amplifier of the ACOM transistor series over the input RF coaxial cable.
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8.1.9. Remote Control
The remote control and indication from an amplifier of the ACOM transistor series is provided over the input
RF coaxial cable of the tuner using a 60 kHz / 4800 bps bidirectional FSK modem.
8.1.10. Maximum Length of the Input Coaxial Cable
The maximum length of the RF coaxial cable between the amplifier output and the tuner input (see Sections
8.1.4 RF Input Characteristics
) is 100 m (330 ft) for a cable of RG213 type or similar. The cable characteristic impedance should be
Station
50 Ohm and the DC resistance should be below 1 Ohm for inner and outer conductors altogether.
To achieve maximum distance the coaxial cable must be of copper, not steel conductors
(even though silver plated).
8.1.11. Size & Weight (operating, excluding fastening elements and connected cables)
WxDxH: 345x250x190 mm, 4.2 kg (13.6x9.9x7.5 inches, 9.3 lbs.).
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October 2023
);
,
,
8.1.8 Power Supply
8.1.9 Remote Control
NOTICE
and
8.2.9 Cable Required from the Radio
S e c t i o n SPECIFICATIONS | Page 75 of 88
8.1.3
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