Telecommunication
The other meaning of the term "channel" in telecommunications is seen in the phrase communications channel, which is a subdivision of a transmission medium so that it can be used to send multiple streams of information simultaneously. For example, one radio station can broadcast radio waves into free space at frequencies in the neighborhood of 94.5 MHz (megahertz) while another radio station can simultaneously broadcast radio waves at frequencies in the neighborhood of 96.1 MHz. Each radio station would transmit radio waves over a frequency bandwidth of about 180 kHz (kilohertz), centered at frequencies such as the above, which are called the "carrier frequencies". Each station in this example is separated from its adjacent stations by 200 kHz, and the difference between 200 kHz and 180 kHz (20 kHz) is an engineering allowance for the imperfections in the communication system.
Community radio
They should be open to divergent opinions and divergent lifestyles regarding each of them. The average radius of reach is 1 km (covering a village and a neighborhood in particular). The use for the ideological-political end or to present a specific belief is not allowed. An entity that has interest can send the documents to the Statement of Interest Register (CDI). The requests received appeared in the National Grant Plan (PNO), later a notice will be opened with the documents that should be sent. This does not mean that the institution has obtained the radiofrequency, there will be a selection process to eliminate the competition. Even if after all it is authorized, it will have to be countersigned 90 days until the release of the National Congress, otherwise the applicant may require a provisional license.