Frequency Range: 0.045 GHz to 26.5 GHz The Agilent 85052D Calibration Kit contains precision standard devices to characterize the systematic errors of the Agilent 8720 series or Agilent 8510C Network Analyzer system in the 3.5 mm interface. The kit also contains adapters to change the sex of the test port, connector gages for verifying and maintaining the connector interface, and a torque wrench for proper connection.