ARRL Technician Practice Exam

Which of the following actions may help to address a radio frequency interference issue?

1. All of these choices are correct

2. Retuning the receiver

3. Adjusting the antenna orientation

4. Changing the power settings

The correct answer is: All of these choices are correct

Addressing radio frequency interference (RFI) can be a multifaceted process, as various factors can contribute to the interference. Retuning the receiver can help by allowing the device to hone in on the desired signal more precisely, effectively minimizing unwanted signals that could be causing interference. This involves adjusting the frequencies the receiver is set to, which can lead to a clearer sound or data transmission. Adjusting the antenna orientation is also a valuable action, as RFI can come from different directions. By changing the orientation of the antenna, you can potentially reduce the reception of unwanted signals. This can significantly improve the overall performance of the radio equipment, as the antenna is designed to pick up signals from certain angles, and a small adjustment can help mitigate interference from other sources. Changing the power settings may also play a role in addressing RFI. Reducing the transmission power can lessen the interference created by your own signals, which is especially important in situations where there are nearby devices operating on similar frequencies. Alternatively, increasing power may help if the signal is weak and struggling to overcome interference, but it must be done carefully to avoid worsening the situation. Given that each of these actions can independently contribute to reducing RFI, choosing all of these choices as a comprehensive approach is