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Return Loss Bridge
When equipped with the VRL-6 accessory, the DLA-9D can perform a swept return loss measurement on a 2-wire circuit and display the results graphically. The sweep end points, rate and step size can all be specified. The VRL-6 provides an external 4 to 2 wire converter and reference impedances so that the DLA-9D is used in 4-wire mode to measure return loss at any frequency or level on the 2-wire circuit.