The ZHC-12 is a professional quality, passive output combiner. This unit is designed for use in headends to combine the outputs of multiple modulators and processors. The ZHC-12 has twelve (12) broadband input ports and one combined output port. This combiner features high isolation between ports due to an integrated directional coupler design. The input ports of the ZHC-12 are broadband, accepting signals in the 50-450MHz frequency range. Specifications: ZHC-12 RF: Number of inputs: 12 Frequency range: 50-450MHz Insertion loss: 16dB Isolation: 40dB Impedance-all ports: 75ohm Connectors (rear panel): RF input(s): "F" type, female RF output: "F" type, female Test port (front panel): "F" type, General: Power requirements: Voltage: 117VAC, +/-10% Frequency: 60Hz Power: 10W Connectors (rear panel): RF input(s): "F" type, female RF output: "F" type, female Test port (front panel): "F" type, female