Amazon.com: HDMI to SDI, HDMI to SDI Converter Two SDI Output Audio Embedder Support HDMI 1.3, 3G/ HD-SDI Auto Format Detection Extender for Camera CCTV (Black) : Electronics
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Blackmagic Design Micro Converter SDI to HDMI 3G with PSU - Sound Productions
Z CAM HDMI to SDI Converter A0402 B&H Photo Video
HD SDI to Hdmi Converter - HD SDI 1080p Resolution
Blackmagic HDMI / SDI 12G - Bi-Directional with power supply - BMD-CONVBDC/ SDI/HDMI12G/P - Micro Converter 12G
Apantac DA-HDTV-SDI HDMI to SDI Converter with Looping Input & Dual Output