AJA HA5-Plus HDMI to 3G-SDI Mini-Converter HA5-PLUS B&H Photo
SDI to HDMI Converter Adapter - Supports HD-SDI SD-SDI 3G-SDI to Full HD 1080P @ 60 Video Convertor Box Adaptor with Embedded Audio for HDMI compatible TV Display Monitor - Walmart.com
Blackmagic HDMI to SDI 2 - CONVMBHS2 - Mini Converter
HDMI to SDI Video Converter BNC SDI/HD-SDI/3G-SDI Adapter 1080 |Tendak
Micro Converters | Blackmagic Design
3 x BlackMagic Design Micro Converter SDI to HDMI - Bullaki - Cambridge
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