Blackmagic Design ATEM 1 M/E Constellation HDATEM 1 M E Constellation HD is a high definition live production switcher packed with advanced features. The single M E design includes 10 standards converted 3G SDI inputs and 6 independent 3G SDI aux outputs. It also includes a USB webcam output, DVE, chroma keyers, media players, multiview and more. ATEM Constellation HD switchers feature a compact rack mount design with a built in control panel. This allows operation of the switcher, critical