Complete the following steps to configure your hardware for S-parameter measurements using S11 two couplers per DUT port.

Refer to the hardware requirements listed in S11 2 Couplers System Hardware Requirements. Ensure all components are installed in the chassis before completing the following steps.
Note The PXIe-5831 does not have dedicated RF IN/OUT ports. Use the IF IN/OUT 1 port as RF IN and the IF IN/OUT 0 port as RF OUT if using a PXIe-5831.
Figure 10. S11 2 Couplers System Connections


  1. Connect the RF OUT or IF IN/OUT 0 port of the IN port of a coupler using SMA cables.
  2. Connect the output ports of the two couplers with an adapter.
  3. Connect the coupled port of each coupler to the channels of the RF IN switch or switch bank using SMA cables.
  4. Connect the COM port of the RF IN switch or switch bank to the RF IN or IF IN/OUT 1 port of the VST using an SMA cable.
  5. Connect the unconnected input port of the coupler pair to the DUT for measurement or the calibration kit for calibration using SMA cables.
  6. If using the PXIe-5841, share the local oscillator (LO) signal by connecting the TX LO OUT port to the RX LO IN port of the VST using a MMPX-to-MMPX cable. If using the PXIe-5831, no additional connection needs to be made as the LO is shared internally.