PARASITIC EMISSION

In a communications system in which one or more electromagnetic sources are used, electromagnetic radiation --such as lightwaves, radio waves, microwaves, X-rays, or gamma rays from one or more of the sources--that is not harmonically related, i.e., is not coherent , with the transmitted carrier . Note: Parasitic emissions are usually caused by undesired oscillations or energy-level transitions in the sources. [ From Weik '89 ]