In which position should the ANT switch be during maintenance?

During maintenance procedures for radio equipment, the ANT (Antenna) switch should be set to the dummy load position. The reason for this is primarily to prevent potential damage to the transmitter and to ensure safe operation. When maintenance is being performed, connecting the transmitter directly to the antenna can result in unintended transmission, which could lead to interference, potential accidents, or damage to the equipment.

In the dummy load position, the transmitter's output is redirected to a load that simulates the antenna without broadcasting a signal. This allows technicians to safely perform checks and repairs on the transmitter while adequately protecting other components and the operational environment.

Using this configuration ensures that while the equipment is being serviced, no actual signals are emitted, maintaining compliance with regulations and safety protocols associated with radio frequency transmission.