ETSI PRETS 300 638-1995 传输和多路转换(TM). 在20 MHz信道空间的频段上进行的数字信号和模拟视频信号传输用的点到点固定无线电连接设备
Transmission and Multiplexing (TM); Fixed Point-to-Point Radio Link Equipment for the Transmission of Digital Signals and Analogue Video Signal Operating at Frequency Bands with 20 MHz Alternate Channel Spacing