RepeaterBook Wiki - downlink_tone #wiki Integration <repeaterbook@...>


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