(1) The information carrying capacity of the system. In analog systems, this is also the highest Frequency that can be carried. (2) The capacity of a telecom line to carry signals. The necessary bandwidth is the amount of Spectrum required to transmit the signal without Distortion or Loss of information. FCC rules require suppression of the signal outside the band to prevent interference. (3) Maximum frequency that can be used to transmit a communication signal without excessive distortion. Measured in Hertz or cycles per second. The more information contained in a signal, the more bandwidth it requires for distortion-free transmission. 4. The capacity of a telecom line to carry signals. The necessary bandwidth is the amount of spectrum required to transmit the signal without distortion or loss of information. FCC rules require suppression of the signal outside the band to prevent interference. 5. A Range of frequencies in the broadcast spectrum that is occupied by a signal. (For example, a television Channel may have a bandwidth of 6 MHz.) The "necessary bandwidth" is the amount of spectrum required to transmit the signal without distortion or loss of information. Commission rules require suppression of the signal outside the band to prevent interference.