Digital communications

DMR

• What is DMR and how it works — timeslots, Color Code Last updated Sep 23, 2026 DMR is an ETSI digital mobile radio standard with two-slot TDMA on 12.5 kHz. Learn timeslots, Color Code, talkgroups, simplex, repeaters and amateur DMR networks.

APRS

• What is APRS — Automatic Packet Reporting System Last updated Sep 23, 2026 APRS exchanges packet data over RF and the internet: position, messages, objects, digipeaters, IGates and APRS-IS — a clear guide for radio amateurs.

Meshtastic / LoRa

• What is Meshtastic and LoRa — differences and basics Last updated Sep 23, 2026 LoRa is a modulation technology; Meshtastic is an open-source mesh project on LoRa devices. Range, power use and starter concepts explained clearly.

Articles

• FT8 without magic — what really happens in a QSO Last updated Sep 23, 2026 FT8 through the official WSJT-X QSO flow: 15-second T/R cycles, structured messages, grid, SNR, RRR/RR73, LDPC and the operator’s role versus the software.