5 CALIBRATION AND CALIBRATION KIT
101
Note For isolation calibration, it is recommended to set narrow
IF bandwidth, attenuation, and firmly fix the cables.
5.1.6.4 Full One-Port Calibration
Full one-port calibration involves connection of the following three standards to one test
port:
§SHORT,
§OPEN,
§LOAD.
Measurement of the three standards allows for acquisition of all the three error terms
(Ed, Es, and Er) of a one-port model. Full 1-port calibration is a highly accurate
method for 1-port reflection measurements.
5.1.6.5 One-Path Two-Port Calibration
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.
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 2-port error model.
One-path two-port calibration is used for measurements of the parameters of a DUT in
one direction, e.g. S11 and S21.
5.1.6.6 Full Two-Port Calibration
A full two-port calibration involves seven connections of the standards. This calibration
combines two full 1-port calibrations for each port, and one THRU connection, which
provides two transmission measurements for each test port being a source. If optional
isolation calibration is required, connect LOAD standards to the both test ports of the
Analyzer and perform two isolation measurements for each source port.
Full 2-port calibration allows for correction of all the twelve error terms of a 2-port
error model: Ed1, Ed2, Es1, Es2, Er1, Er2, Et1, Et2, El1, El2, Ex1, Ex2 (correction of Ex1, Ex2
can be omitted).
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