AJA FiDO-4T 4-Channel 3G-SDI to Single-Mode LC Fiber Transmitter (Mini Converter). – 4 Single-Mode LC fiber outputs (SMPTE-297) – 4 simplex or 2 duplex. – 4K/UltraHD-SDI over 4 fiber links. – 4 independent channels of 3G/HD/SD-SDI input (BNC, SMPTE-259/292/424).