In plain language: Electromagnetic interference is unwanted electromagnetic energy that degrades, interrupts, or corrupts the operation of equipment or a radio service.
Why the station behaves this way
The source may conduct along power and signal wiring or radiate through space. The victim, coupling path, frequency, duty cycle, and installation determine the symptom.
A common wrong turn
Calling every received noise “RF interference” skips the investigation; the source may be inside the station, elsewhere in the building, or part of the radio itself.
What to do at the radio
Describe the symptom, frequency, timing, and affected equipment, separate conducted from radiated paths, change one variable at a time, and document evidence before applying a fix.
Operating boundary
Use current equipment instructions, legal operating limits, the exact signal path, and observed conditions. A connector, software label, transformer ratio, or forecast value does not prove complete-system performance.
