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The R-S-T system is used by amateur radio operators, shortwave listeners, and other radio hobbyists to exchange information about the quality of a radio signal being received. The code is a three digit number, with one digit each for conveying an assessment of the signal's readability, strength, and tone. [1][2] The code was developed in 1934 ...
Amateur teleprinting over radio (AMTOR) D-STAR (Digital Data) a high speed (128 kbit/s), data-only mode. Hellschreiber, also referred to as either Feld-Hell, or Hell a facsimile-based teleprinter. Discrete multi-tone modulation modes such as Multi Tone 63 (MT63) Multiple frequency-shift keying (MFSK) modes such as. FSK441, JT6M, JT65, and FT8.
Ten-code. Ten-codes, officially known as ten signals, are brevity codes used to represent common phrases in voice communication, particularly by US public safety officials and in citizens band (CB) radio transmissions. The police version of ten-codes is officially known as the APCO Project 14 Aural Brevity Code.[1]
The QSA code was included in the Madrid Convention (Appendix 10, General Regulations) sometime prior to 1936. [citation needed] The Amateur radio R-S-T system signal report format currently in use was first developed in 1934. [citation needed]
Under authority of the Radio Act of 1912, the Department of Commerce issued Amateur First Grade and Amateur Second Grade operator licenses beginning in December of that year. [10] Amateur First Grade required an essay-type examination and five (later ten) words per minute code examination before a Radio Inspector at one of the Department's ...
The Q-code is a standardised collection of three-letter codes that each start with the letter "Q". It is an operating signal initially developed for commercial radiotelegraph communication and later adopted by other radio services, especially amateur radio. To distinguish the use of a Q-code transmitted as a question from the same Q-code ...
Amateur radio slang YL: Young Lady (any female radio operator, regardless of age) Amateur radio slang Z: Zulu time i.e. UTC: operating signal 161: Best regards + Love and kisses; used on YL networks as a sign-off sum of two 92 Codes: 30: No more; this is the end; finished Not used in radiotelegraphy 92 Code: 72: Best regards: Amateur radio slang.
After the 1993 World Trade Center bombing, radio repeaters for New York City Fire Department communication were installed in the tower complex. Because they were unaware that several controls needed to be operated to fully activate the repeater system, fire chiefs at their command post in the lobby of the North Tower thought the repeater was not functioning and did not use it, though it did ...