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General| Type | Automatic Antenna Tuner |
|---|---|
| Input Impedance | 50 ohms |
| Power Supply | 13.8 V DC |
| Frequency Range | 1.8-30 MHz |
| Tuning Speed | 2 to 3 seconds |
| Power Consumption | 1A (max.) |
Matches various antennas, stores tuning data, and offers quick tune-up.
Low power tuning and durable, weather-resistant construction.
Instructions for unpacking, checking, and selecting a location.
Lists installation types and provides mounting advice.
Covers soldering PL-259, coaxial, and control cable connections.
Steps for securing cover, ground system, and final cable connections.
Step-by-step guide to operate the tuner with the IC-M700.
How to operate the tuner with radios other than the IC-M700.
Explains the PRESET function and its limitations.
Identifies main components visible on the top of the AT-120.
Shows side view with water drain and ground terminal.
Overview of the AT-120's microprocessor control and detector circuits.
Explains forward power and SWR detector circuits.
Details phase and impedance detector circuits.
Describes the logic circuit and LED status indicators.
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