Back Panel1. GND: Is used to Earth the housing.2. IR Matrix, IR EXT: if IR sensor on the front panel is obstructed or the unit is installed in an enclosed area out ofinfrared line of sight, one of the IR RX receivers supplied can be connected to the IR EXT socket on the backpanel to extend the IR sensor range and enable local control of the matrix. IR IN/OUT: Super IR control systeminterface. For further details, please refer to the Super IR system control introduction.3. PC CONTROL, TCP/IP: This port is the link for TCP/IP control, connect to an active Ethernet link with an RJ45terminated cable. RS232: Connect to a PC or control system with D-Sub 9-pin cable supplied for thetransmission of RS-232 commands.4. HDMI INPUT: Connects to the HDMI input source devices such as a DVD player or a Set-top Box via HDMI cable.6. VIDEO & AUDIO OUTPUT: HDMI OUTPUTs are used to connect HD displays within 20m. HDBT OUTPUTsconnect to the HDBT Receivers. The coaxial and analog audio outputs connects to audio amplifiers.The TX and RX for RS232 communication with the HDBT Receiver TX and RX.6. AC POWER INPUT: Connects to a mains socket using the AC power cord supplied.Remote Control Functions1. Press this button to switch on the matrix or to place it to standby mode.2. Press these buttons to select output A,B,C,D for input 1,2,3,4 port.5