The Model DC-A20 is a broadband RF DC Block with a third terminal that accepts a DC bias Voltage that can be injected on only one of the two RF terminals, and isolated from the other. It is used to bias amplifers of other active products, while isolating the input RF terminal from the DC bias. The unit consists of a high voltage DC Block capacitor in the main path, and an inductor to inject the DC bias on the main RF line output connector. The unit is provided with male and female Type N connectors and a filtered feedthru terminal