I need broadcast and stream HD events using the QuestTel 3G-SDI extender over fiber. I am looking into having the ability to do full multicam mixes in 4K. Before I even look at investing in additional equipment, is there such thing as a 30km 3G, 6G fiber that's capable of UHD 4K? What's the maximum distance a 4K SDI fiber can run? What are users doing for 4K long cable runs.