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Beeps and melodies in two-way radio
2019-03-23T02:52:51.8487475Z - Oona Räisänen / Hacker News
Roger beepThe roger beep is a short melody sent by many hand-held radios to indicate the end of transmission. The end of transmission must be indicated, because two-way radio is 'half-duplex', which means only one person can transmit at a time. Roger beeps are especially common in consumer radios, but I've heard them in ham QSOs as well, especially if repeaters are involved. False positives are rare; most of them are detections of very short tone signatures that only consist of one or two beeps. Naming and classificationBecause I love classifying stuff I've had to come up with a system for naming these roger tones as well.

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