The Q - key (also Q- groups or English. Q code ) is used by radio services for efficient and unambiguous transmission of standard messages.
Originally developed for the Morse code, Q - keys are also used in other modes, eg in radio ( Fonie ) ham radio. The official meaning of the Q groups and their use in amateur radio everyday partly strong, as demonstrated distinguished: QRT - officially: Make your sending a! QRT - Amateur Radio on the other hand: I Carry conclusion.
There are no shortcuts and acronyms, the letters have no conceptual meaning. It was simply the list of phrases to a certain extent " numbered ", the first letter is a Q was to show the Q key, and the following two were assigned completely arbitrary.
Their use meant a considerable saving of time, as in the Morse code, each letter must be submitted separately in a sentence. The use of the Q- groups could reduce the time required so that the transmission claimed less time than telling the importance.
Outside of amateur radio they are only in very few cases in use: for example, in the aviation industry in Europe, and France in addition to the slope direction of the active runway ( QFU ). In the U.S. they are not more common.
Today's standard Q- keys were introduced in 1912 by the International Radio Telegraph Convention and expanded over the years to over 250 key. Each key consists of three letters, the first of which is always a Q. They may be supplemented by additional information.
According to different requirements of wireless services the code groups are allocated to the radio services:
Used before the introduction of modern-day International Morse Code and abbreviations such as the Q- key telegraph companies of the 19th century, groups of special abbreviations that were not compatible with those of other companies.
Most Q- key have a question and a response message or form, with the former being indicated by a trailing question mark. For many response forms exist predefined answers that are given by the attached figures. It is 1 poor, 2 poor, 3 is adequate, 4 good, 5 very good.