CTCSS / PL tone — A sub-audible tone that opens a repeater.
A low tone sent under your voice. If a repeater will not respond to you, a missing or wrong tone is the most likely reason.
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Related words
- FM — Frequency Modulation. VHF and UHF voice.
- K index — How disturbed the earth's magnetic field is.
- SSB — Single Sideband. HF voice.
- Band — A range of frequencies set aside for a purpose.
- CW — Continuous Wave. Morse code.
- Simplex vs duplex — One frequency versus two.
- Ionosphere — The layer that bounces HF signals back to earth.
- Frequency — How fast a radio wave oscillates.