Connecting Signals

Use appropriate shielded cables to connect signals to the NI vector network analyzer to ensure you achieve the best measurement accuracy possible.

Unsuitable cabling can adversely affect the vector error correction, producing unreliable and misleading results. Precision coaxial cables are available for purchase from ni.com. Ensure you take the following precautions when connecting signals to the PXIe-5632.

  • Use phase-stable cables to make connections with the PXIe-5632. Phase-stable cables help ensure that the reference plane remains stable across shifts in cable position after calibration.
  • Maintain placement of any accessories or cables that you attach to the PXIe-5632 to ensure that the reference plane remains constant between calibration and measurement.
    Tip You can also use phase-equal adapters after calibration to preserve the reference plane.

The following figure shows an example of the reference plane for a male and female connector.

Figure 4. Connector Reference Plane and Pin Depth

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  1. Reference Plane
  2. Female Connector
  3. Male Connector
  4. Pin Depth