FM Strong Signal Capture and AM Overloading

FM capture is an unusual condition that occurs when traveling in the vicinity of a broadcast tower.
- If listening to a weak FM station when passing the broadcast tower, a stronger station may interfere without changing the tuning control.
- When passing the tower, the station may switch back and forth a few times before returning to the station originally tuned.

A localized condition which will not harm the receiver is known as overloading.

When several broadcast towers are present (common in metropolitan areas), several stations may overload the receiver resulting in considerable station changing, mixing and distortion.
- Some overloading may also be noticed on AM but usually to a lesser degree.