A one-path two-port calibration combines full one-port calibration with transmission normalization. This method allows for a more accurate estimation of transmission tracking error (Et) than using transmission normalization.
One-path two-port calibration involves connection of the three standards to the source port of the Analyzer (as for one-port calibration) and a THRU standard connection between the calibrated source port and the other receiver port (See figure below).
One-path two-port calibration allows for correction of Ed, Es, and Er error terms of the source port and a transmission tracking error term (Et). This method does not derive source match error term (El) of a two-port error model.
An optional isolation calibration can be performed by measurement of two LOAD standards connected to both test ports of the Analyzer. In this case, the isolation error (Ex) is additionally corrected in the one-path two-port calibration.
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For isolation calibration, set a narrow IF bandwidth and firmly attach the cables. |
One-path two-port calibration is used for measurements of the parameters of a non-reciprocal DUT such as amplifiers in one direction, e.g. S11 and S21.
One-path two-port calibration
Before starting calibration perform, select an active channel, set the parameters of the channel (frequency range, IF bandwidth, etc), and select the calibration kit.
