Unlike FM mode, in the SSB voice and CW mode areas of the amateur radio bands operators are free to center their transmissions where it is most optimal (such as away from adjacent traffic that can interfere) and not expected to use whole-number, divisible-by-five, or otherwise channelized center frequencies. The use of a CQ call is almost always used in single-sideband (SSB) voice or CW mode (morse code telegraphy). This technique allows the other operators to zero-in as close to the caller's center frequency using the human ear to fine-tune their transceiver before engaging the caller in a two-way communication. In the use of single-sideband (SSB) voice or CW mode ( morse code telegraphy), an amateur radio operator often makes a general call by transmitting CQ repeatedly (such as "CQ CQ CQ") so that other operators scanning for such calls are aided by the familiar rhythmic sound in quickly discriminating distant (weak signal) general callers from other traffic and spurious emissions. Another common qualifier is CQ TEST used to be logged by the Reverse Beacon Network The originator of the call can be identified by appending the letters DE ( French for "from", also means "this is.") and the call sign of the transmitting station. In amateur radio usage, a CQ call can be qualified by appending more letters, as in CQ DX (meaning "calling all stations located in a different continent to the caller"), or the ITU call sign prefix for a particular country (e.g. Titanic's radio operator subsequently alternated between SOS and CQD calls afterwards. When the Titanic sank in 1912, it initially transmitted the distress call " CQD DE MGY" (with "MGY" being the ship's call sign). It was proposed by the Marconi Company and adopted in 1904, but was replaced between 19 by the SOS code. Ī variant of the CQ call, CQD, was the first code used as a distress signal. In English-speaking countries, the origin of the abbreviation was popularly changed to the phrase "seek you" or, later, when used in the CQD distress call, "Calling all distress".ĭemonstration of the spark-gap transmitter at Massie Wireless Station sending Morse code ("CQ DE PJ")ĬQ was adopted by the Marconi Company in 1904 for use in wireless telegraphy by spark-gap transmitter, and was adopted internationally at the 1912 London International Radiotelegraph Convention, and is still used. It sounds also like the French "c'est qui?", which means "who's there?". The letters CQ, when pronounced in French, resemble the first two syllables of sécurité, and were therefore used as shorthand for the word. It is still used in this sense in international telecommunications. French was, and still is, the official language for international postal services, and the word sécurité was used to mean "safety" or "pay attention". The CQ call was originally used by landline telegraphy operators in the United Kingdom. It is still widely used in amateur radio. Transmitting the letters CQ on a particular radio frequency is an invitation for any operators listening on that frequency to respond. CQ call of German amateur radio station DG2RBH on the 80 m band ("Hello CQ from Delta Golf 2 Romeo Bravo Hotel")ĬQ is a code used by wireless operators, particularly those communicating in Morse code, ( ▄▄▄ ▄ ▄▄▄ ▄ ▄▄▄ ▄▄▄ ▄ ▄▄▄ ), but also by voice operators, to make a general call (called a CQ call). This entry was posted in CB Radios on Januby danny.For other uses, see CQ (disambiguation). The list of 10 codes below was taken from the manual of a Cobra CB Radio. I don't recommend that you memorize the list below, just use it as a reference if you hear something that you're not sure about. If you're new to the CB world, take a look at the list below to get familiar with some codes you may hear.Īs you can imagine, some are more popular than others. Ten codes are an abbreviated way of sending messages, some of which are very common among those that use CB radios frequently or professionally. The following is a list of CB radio "10 codes". Cigarette Lighter Adapters and Accessories.Two Way Radio Books and Reference Cards.
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