RTTY — Radio Teletype.
An older digital mode using shifting tones. Still popular in contests.
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Related words
- FM — Frequency Modulation. VHF and UHF voice.
- Band — A range of frequencies set aside for a purpose.
- Watts — Transmit power.
- FT8 — A weak-signal digital mode.
- Offset — The gap between transmit and receive frequency.
- Solar flux — A number that tracks solar activity.
- CW — Continuous Wave. Morse code.
- Ionosphere — The layer that bounces HF signals back to earth.