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Multi-mode Digital Voice Modem (MMDVM) SDR++ - multiplatform, open-source software defined radio receiver; SDRangel - multiplatform, open-source software defined radio receiver/transmitter; OpenWebRX - web-based software defined radio receiver; mrefd - M17 reflector [22] rpitx - general radio frequency transmitter for Raspberry Pi [23]
An Agilent Modulation Domain Analyzer 53310A showing the narrow band 4-FSK signal produced by a Raspberry Pi. Occupied bandwidth is about 6 Hz; Synchronization is via a 162 bit pseudo-random sync vector. Each channel symbol conveys one sync bit (LSB) and one data bit (MSB). Duration of transmission is 162 × 8192 ⁄ 12000 = 110.6 s.
Morse code is called the original digital mode. Radio telegraphy, designed for machine-to-machine communication is the direct on / off keying of a continuous wave carrier by Morse code symbols, often called amplitude-shift keying or ASK, may be considered to be an amplitude modulated mode of communications, and is rightfully considered the first digital data mode.
D-STAR (Digital Smart Technologies for Amateur Radio) is a digital voice and data protocol specification for amateur radio. The system was developed in the late 1990s by the Japan Amateur Radio League and uses minimum-shift keying in its packet -based standard.
Logging, Transceiver control, Callbook lookup, QSL handling (Hardcopy / LoTW / eQSL / Club Log), Awards, DX Spots, Digital Modes DXLab by AA6YQ Freeware Windows Logging, Transceiver control, Rotor control, Callbook lookup, QSL handling (Hardcopy / LoTW / eQSL / Club Log), Awards, DX Spots, Digital modes Emacs QSO Logger: Open-Source (GPL-3.0)
Fldigi (short for Fast light digital) [4] is a free and open-source program which allows an ordinary computer's sound card to be used as a simple two-way data modem.The software is mostly used by amateur radio operators who connect the microphone and headphone connections of an amateur radio SSB or FM transceiver to the computer's headphone and microphone connections, respectively.
PACTOR is a radio modulation mode used by amateur radio operators, marine radio stations, military or government users such as the United States Department of Homeland Security, and radio stations in isolated areas to send and receive digital information via radio. [citation needed]
Quantized radio modulation modes (1 C, 57 P) Pages in category "Digital amateur radio" The following 20 pages are in this category, out of 20 total.