FT8 — A weak-signal digital mode.
Your computer sends and decodes short structured messages. It works when signals are far too weak for voice, and it now accounts for a huge share of all HF activity.
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Related words
- Ionosphere — The layer that bounces HF signals back to earth.
- Simplex vs duplex — One frequency versus two.
- RTTY — Radio Teletype.
- FM — Frequency Modulation. VHF and UHF voice.
- K index — How disturbed the earth's magnetic field is.
- CTCSS / PL tone — A sub-audible tone that opens a repeater.
- Sporadic E — Sudden short-lived openings.
- APRS — Automatic Packet Reporting System.