SWR — Standing Wave Ratio.
A measure of how well your antenna system matches your radio. A high SWR means power is bouncing back instead of radiating, and modern radios cut power to protect themselves when they see it.
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Related words
- Watts — Transmit power.
- Frequency — How fast a radio wave oscillates.
- K index — How disturbed the earth's magnetic field is.
- Propagation — How your signal travels.
- Solar flux — A number that tracks solar activity.
- CW — Continuous Wave. Morse code.
- FM — Frequency Modulation. VHF and UHF voice.
- FT8 — A weak-signal digital mode.