Source Power Calibration

The source power calibration feature improves the accuracy of the power delivered to the device under test (DUT) by moving the power reference plane to the DUT. If a network or cable, for example, is inserted between the DUT and the vector network analyzer, you can use source power calibration to ensure desired absolute power accuracy at the DUT connection. Absolute power accuracy can compensate for cable loss.

Power calibration is compatible in both frequency sweep and power sweep modes. In power sweep mode, the source power is adjusted for the specified frequency across the power sweep range to provide a linear level at the calibration plane. In frequency sweep mode, the source power is adjusted to provide a constant level across the frequency sweep range at the test port. You can connect a power sensor to the port to be calibrated, PORT 1 or PORT 2, and at each point in the sweep, the system adjusts to deliver the desired absolute power level within a tighter accuracy.

The following table lists supported power meters you can use for source power calibration.

Note  Install the appropriate driver software for the power meter before using the power meter with NI-VNA.

Note  Source power calibration is compatible with only the NI 5632.