The emEXTEND-HDMI-SM-TX is a miniature converter device that converts HDMI to SDI over fiber optic. The converter can be used as part of an HDMI over fiber optical extender when paired with the emEXTEND-DMI-SM-RX device. The device accepts any HDMI type resolution at the input and generates an SDI signal automatically. The first 8 audio pairs are embedded into the SDI signal. No configuration required.