CTCSS tones and DCS Codes help reduce interference by filtering out transmissions from others who are using the same channel or frequency. When used with repeaters, these tones and codes serve as sort of an “access key” to allow communications by radio operators who are granted permission to use the repeater system. So, what is the difference between them?
In this episode of Radio 101, Tommy explains the difference between CTCSS tones and DCS codes in a two way radio and how they work.
