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This paper depicts the digital radio test bed design and performance evaluation for digital audio broadcasting, DAB+, and terrestrial digital multimedia broadcasting audio systems that are representative digital radio broadcasting standards operating in band III (out-of-band). We consider a laboratory trial to measure the performance of each digital radio system. The existing broadcasting measurement systems have some limitations, such as the small number of available measurement items and broadcasting systems. However, the introduced test bed can cover above representative three digital radio systems and measure various performance parameters. This paper minutely describes not only the test bed designs but also various test results according to the measurement items. Therefore, this paper can help select an appropriate digital radio standard.