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A Radio code is any code that is commonly used over a telecommunication system such as Morse code, brevity codes and procedure words. Brevity code
The National Radio Systems Committee has introduced a unique Radio Data System Program Identification code for US FM translators. One type of metadata transmitted by RDS subcarrier is the PI code, which is used by the receiver to uniquely identify the audio program being broadcast by the FM station.
The PI code allows the radio to identify the station across different broadcast relay stations. This in turn allows listeners to stay tuned to a network whilst travelling across the service area of multiple transmitters. The PI code is a 4-digit hexadecimal number. For example BBC Radio 1 has PI code C201. (The number itself is usually not ...
An RDS-TMC receiver is a special FM radio tuner that can decode TMC data. Satellite TMC receivers use a dedicated data channel that is broadcast as part of much larger broadcast digital audio channels. TMC data is decoded by matching event and location codes against look-up tables of phrases and locations.
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.
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The GPS week number rollover is a phenomenon that happens every 1,024 weeks, which is about 19.6 years. The Global Positioning System (GPS) broadcasts a date, including a week number counter that is stored in only ten binary digits, whose range is therefore 0–1,023.
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