The Analyzer is supplied by the manufacturer calibrated with calibration coefficients stored in its non-volatile memory. The factory calibration is used by default for the initial correction of the measured S-parameters. Such calibration is referred to as system calibration, and error correction is referred to as system correction.
The system correction ensures initial values of the measured S-parameters before the Analyzer is calibrated by the user. System calibration is performed on the plane of the physical port connectors and does not account for the cables and other fixtures used to connect the DUT. The measurement accuracy of the Analyzer with a user setup prior to calibration is not rated.
Normally, disabling the system correction setting is not required for calibration and further measurements.
The system correction can be disregarded only when a proper calibration has been performed for the Analyzer. If user calibration has been performed, the measurement accuracy of the Analyzer is determined by user calibration and does not depend on the system correction status. If the user calibration has not been performed, then enabling/disabling system calibration would have an impact on measurements. If system correction is disabled, this is indicated in the instrument status bar.
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TRL calibration is not compatible with system correction. The system correction will be automatically turned off when TRL calibration is performed. |
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To disable/enable the system correction, use the following softkeys: System > Misc Setup > System Correction [ ON|OFF ] |
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