Key up — Transmit.
Pressing the transmit button. From the old telegraph key.
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Related words
- Picket fencing — A fluttering, choppy signal.
- Stand by — Wait. Pause.
- Monitor — Listen.
- Elmer — A ham radio mentor.
- Back to you — Your turn to talk.
- Unkey — Stop transmitting.
- Full quieting — No background noise at all.
- Rig — Your radio.