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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.
Voice procedure communications are intended to maximize clarity of spoken communication and reduce errors in the verbal message by use of an accepted nomenclature. It consists of a signalling protocol such as the use of abbreviated codes like the CB radio ten-code, Q codes in amateur radio and aviation, police codes, etc., and jargon.
SINPFEMO code consists of the SINPO code plus the addition of three letters to describe additional features of radiotelephony transmissions. These codes are defined by Recommendation ITU-R Sm.1135, SINPO and SINPFEMO codes. [1] SINPO code is most frequently used in reception reports written by shortwave listeners. Each letter of the code stands ...
" Although Morse code is no longer used for commercial or professional purposes, it continues to be used in amateur radio. In QSK or full break-in operation the silent periods between the Morse code dits and dahs enable operators to listen between their transmitted signals for signals from the other operator, thus enabling a conversational ...
SINPO code, code used to describe the quality of radio transmissions, especially in reception reports written by shortwave listeners; R-S-T system, information about the quality of a radio signal being received. Used by amateur radio operators, shortwave listeners; Morse code abbreviations; Telegraphese; List of HTTP status codes; Tactical ...
This is an accepted version of this page This is the latest accepted revision, reviewed on 15 January 2025. Letter names for unambiguous communication Not to be confused with International Phonetic Alphabet. Alphabetic code words A lfa N ovember B ravo O scar C harlie P apa D elta Q uebec E cho R omeo F oxtrot S ierra G olf T ango H otel U niform I ndia V ictor J uliett W hiskey K ilo X ray L ...
Feb. 16—PENDLETON — As several students huddled around him, Mike Cook strained to hear a clear voice through crackling static coming from the speaker of his ham radio console. "Some people can ...
An ARRL Numbered Radiogram is a brevity code used in composing ARRL Radiograms during times of radio congestion.. The code is used to transmit standard messages, sometimes with customized text, very quickly by experienced ARRL National Traffic System (NTS) message traffic handlers.