12GM is a compact SDI transport converter that enables 12G-SDI to Quad 3G-SDI and Quad 3G-SDI to 12G-SDI conversion. The Muxer/ DeMuxer supports 4K, UltraHD, 2K, HD and SD workflows and conversions from multi-link SDI signals to single link SDI signals, and vice versa at 12G, 6G, 3G and 1.5G bit rates.
https://www.aja.com/products/mini-converters/12gm