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.
KAUR
KAUR (89.1 FM) is a radio station broadcasting programming from Minnesota Public Radio's News & Information service. Licensed to Augustana University in Sioux Falls, South Dakota, United States, the station serves the greater Sioux Falls area and can reliably broadcast up to approximately 30 miles in any direction. The station is currently owned by Augustana University and operated by MPR.