Cross Modulation


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cross modulation

[¦krȯs ‚mäj·ə′lā·shən]
(communications)
A type of interference in which the carrier of a desired signal becomes modulated by the program of an undesired signal on a different carrier frequency; the program of the undesired station is then heard in the background of the desired program.

Cross Modulation

 

a phenomenon observed when radio waves are propagated in the ionosphere. In cross modulation the strong electric field of a powerful radio wave alters, or “disturbs,” the rate of motion of ionospheric electrons along with the wave’s own frequency of modulation and causes the amplitude modulation of other radio waves passing through this disturbed region of the ionosphere. The phenomenon is commonly called the Luxembourg effect.