Digital modes

Digital modes encode information so a receiver or computer can decode it. They range from keyboard conversations to packet networks, image transmission and short weak-signal messages.

Many computer-assisted modes use a transceiver, a computer and an audio or data interface. Important setup details include audio levels, transmit control, frequency settings and the time synchronisation required by the selected mode.

• FT8 and FT4: structured, short-message modes provided by WSJT-X.
• WSPR: weak-signal beacon reporting, used to observe propagation paths.
• RTTY and PSK: families of keyboard communication modes.
• Packet radio: data communication organised into packets, used for several amateur applications.

Digital modes have different purposes and operating conventions. Document the exact software version, settings and mode when describing a result.

• WSJT-X project and user documentation.
• APRS information.