“Attenuation Limited Operation a) The condition in a fiber optic link where operation is limited by the power of the received signal, rather than by bandwidth or by distortion. b) The decrease in magnitude of power of a signal in transmission between points. A term used for expressing the total losses on an optical fiber consisting of the ratio of light output to light input. Attenuation is usually measured in decibels per kilometer (dB/km) at a specific wavelength.”