KEYSIGHT's N9913A-211 option 210 provides transmission / reflection or S21 and S11 measurement capabilities, along with one-port and enhanced response calibrations. To obtain all four S-parameters, forward and reverse (S11, S21, S12, S22) and full two-port calibration, option 211 should be ordered. Full two-port calibration is the most accurate calibration available with FieldFox network analyzers.
Option 210 is a prerequisite for option 211. So you must order option 210 if you want option 211.
This factory-installed option is for quoting purposes only. Only available with the purchase of a new main unit. Please contact a Tessco representative for a customized SKU.