Digital television adapter
（重定向自Converter box）
A digital television adapter (DTA), or digital-to-analog converter [set-top box], or commonly known as a converter box, is a television tuner that receives a digital television (DTV) transmission, and converts the digital signal into an analog signal that can be received and displayed on an analog television set. It may refer to over-the-air broadcast television signals received by an television antenna, or to cable TV systems which switched to digital cable (a Cable converter box). It normally does not refer to satellite TV, which has always required a set-top box either to operate the big satellite dish, or to be the integrated receiver/decoder (IRD) in the case of direct-broadcast satellites (DBS).