PXIe VNA Help
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S-Parameter Calibration

Note: Perform this calibration before the Source Modulation Calibration.

See also

The example procedure in this topic describes how to perform a typical calibration using the Cal All Calibration Wizard method, which allows multiple channel calibrations in a single session. For more information about this calibration method, refer to Calibrate All Channels.

  1. Ensure that the Modulation Distortion measurement class to be calibrated is currently active.

  2. Press Cal > Main > Cal All... to launch the following dialog showing the active measurement class:

  3. Select the ports.

  4. Click Next, then confirm or change the calibration properties in the Measurement Class Cal Properties dialog:

  5. Click Next. to access the Calibration Attenuator Settings dialog:

  1. In the Calibration Attenuator Settings dialog, perform the following:

      1. Set the attenuator settings. Learn more.

      2. Click on the Noise Reduction button to improve measurement accuracy. Learn more.

      3. Click on the Mechanical Devices button to view all switches and attenuators in the VNA. Learn more.

  2. Click Next, then select the DUT connectors and calibration kits in the Select DUT Connectors and Cal Kits dialog.

  3. Click Next to access the Power Cal Settings dialog.

  1. In the Power Cal Settings dialog, set the desired Tolerance and Max Readings. Learn more about Accuracy Tolerance and Max Number of Readings.

  1. Click Next and follow the calibration process until completed.

Calibration for the configuration with M981xAS option 750 (M9810A and M9336A)

A high pass filter is required between the coupler's output port and a power sensor during power calibration process during the calibration in order to get better power measurement accuracy. The "De-embedded adapter" check box should be checked and the appropriate power sensor connector and cal kit should be selected at step 8 in the procedure above.  

Note: When you have the filter between M9810A RF output and coupler input, it is not necessary to put the filter between the coupler's output port and a power sensor. "De-embedded adapter" is not necessary in this case.

 

Measurement Frequency Range

Recommended Filters

20 G to 26.5 GHz

Keysight K281C Coaxial Waveguide Adapter, 2 ea. or equivalent filter (Eravant SCF-15312340-42KFKF-H1, 1ea.)

26.5 G to 40 GHz

Keysight R281A Coaxial Waveguide Adapter, 2 ea. or equivalent filter (Eravant  SCF-22318340-28KFKF-H1, 1ea.)

33 G to 44 GHz

Keysight Q281A Coaxial Waveguide Adapter, 2 ea. or equivalent filter (Eravant  SCF-27324340-222F2F-H1, 1 ea.)

Waveguide Filter (High Pass Filter)

Two coaxial waveguide adapters can be a high pass filter.

Example: two Keysight R281As  (26.5G to 40GHz)