What is Electrical Disturbance?

What is Electrical Disturbance?

• A. It does not affect the ADF at all
• B. The ADF performance is slightly improved
• C. The antenna tends to 'home' in on the direction of the electrical disturbance
• D. It reduces the accuracy of the bearing

Answer: (C)

Electrical disturbances inject unwanted RF energy into the ADF receiver, biasing what the indicator “sees.” The ADF’s loop antenna and detector respond to the strongest signal component it picks up, so a localized disturbance can resemble a strong signal coming from a particular direction. The result is a bearing indication that shifts toward the disturbance source, making the antenna seem to home in on that direction. This is why the correct choice describes the antenna tending to home in on the disturbance. Such interference also degrades overall bearing accuracy, but the standout effect described is the bias toward the disturbance source.

Electrical disturbances inject unwanted RF energy into the ADF receiver, biasing what the indicator “sees.” The ADF’s loop antenna and detector respond to the strongest signal component it picks up, so a localized disturbance can resemble a strong signal coming from a particular direction. The result is a bearing indication that shifts toward the disturbance source, making the antenna seem to home in on that direction. This is why the correct choice describes the antenna tending to home in on the disturbance. Such interference also degrades overall bearing accuracy, but the standout effect described is the bias toward the disturbance source.