Susquehanna Valley Amateur Radio Club

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D-STAR

by | Aug 10, 2026

Digital Smart Technologies for Amateur Radio. A digital voice and data system developed specifically for amateur radio.D-STAR repeaters can be linked through networks, allowing operators in different locations to communicate through connected systems.

DMR

by | Aug 10, 2026

Digital Mobile Radio. A digital voice system used in amateur radio as well as commercial radio systems.Amateur DMR networks can connect repeaters and individual operators over large geographic areas, often with internet-connected infrastructure.

CTCSS / PL Tone

by | Aug 10, 2026

A low-frequency tone transmitted along with an FM signal and commonly used to access repeaters or control a receiver’s squelch.You might see a repeater listing show something like Tone: 100.0 Hz. PL is another commonly used name for this kind of tone. Your radio...