Kramer Electronics 6809 6809 is an audio embedder for SDI (SMPTE 259M)video signals. The SDI input will be embedded with up to 2 channels of AES/EBU audio signals. Inputs - 1 SDI and 2 AES/EBU. Output - 1 SDI with embedded audio - Cable equalized and reclocked up to 350 Meters (1150feet). Group Select - Select which 2 of 4 SDI Audio channels to embed audio. Status - Audio and video input status LEDs. Compact Kramer TOOLS - 3 units can be rack mounted side-by-side in a 1U rack space with the optional RK-3T rack.