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RepeaterBook Wiki - downlink_tone #wiki

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downlink_tone

By kd6kpc

Downlink Tone These tones have many names: * PL tone * CTCSS * sub-audible tone Tones are often attached to a repeater's uplink frequency to control access or limit noise/interference. In the commercial radio applications and invented by Motorola, the term is known as PL, which was short for