FM — Frequency Modulation. VHF and UHF voice.
What repeaters and handhelds use. Clean audio, but it needs a strong signal — FM either works well or drops out entirely.
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Related words
- SSB — Single Sideband. HF voice.
- FT8 — A weak-signal digital mode.
- K index — How disturbed the earth's magnetic field is.
- Wavelength — The physical length of one radio wave.
- CW — Continuous Wave. Morse code.
- Offset — The gap between transmit and receive frequency.
- SWR — Standing Wave Ratio.
- Band — A range of frequencies set aside for a purpose.