The 85027A Directional Bridge is designed to operate with either the 8757 Network Analyzer in ac or dc detection modes or with the 8756 Network Analyzer or 8755 Analyzer Plug-in in ac detection mode. This bridge offers high directivity, excellent test port match, and a measurement range of 10MHz to 18GHz in coax. The unit has a nominal impedance of 50-ohms and uses a Type-N (female) input connector and a 7 mm connector at the test port.