cliff effect
 n.Note: Related to digital cliff.  «Over-the-air digital television is an all-or-nothing proposition, Lewin said, meaning a television will either show a picture as clear as cable, or no picture at all. It’s commonly called the “cliff effect.”» —“Your rabbit ears might not catch all digital TV signals” by Jeff Frantz York Daily Record (Pennsylvania) Feb. 28, 2009. (source: Double-Tongued Dictionary)

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