R3765/67G Series Network Analyzer Operation Manual
7.5 Calibration
7-57
(4) Interpolation of 3-port calibration data
When {INTERPOLATE ON/OFF} is set to ON, the calibration data is interpolated even if
the following stimulus settings are changed during the error correction measurement (cal-
ibration).
• Change of the sweep range (within the calibration range only)
• Change of the sweep type (with some restrictions)
• Change of the number of sweep points
For more information on the combination of sweep types available for interpolation, refer to
Section 7.5.6, "Interpolating Calibration Data."
While the error correction measurement (calibration) is being performed, symbolic charac-
ters are displayed on the left side of the screen to show the calibration status (as listed be-
low).
Normal correction All set conditions match the ones used for the calibration data ac-
quisition.
Interpolation correction The set conditions do not match, but interpolation is possible and
is being executed.
Abnormal correction The set conditions do not match, and the acquired calibration
data which cannot be interpolated is used as is.
Note: When interpolation is impossible, the sweep range is out of the calibration range,
or INTERPOLATE is set to OFF, C3! is displayed and the acquired calibration
data is used as is. However, if one of the following settings is used, CORRECT is
set to OFF and cannot be set to ON.
(1) The number of measurement points is changed and the sweep range is out
of the correction range.
(2) A condition indicated by x on Table 7-1 of Section 7.5.6, "Interpolating
Calibration Data" is set.
(3) A condition indicated by *1 on Table 7-1 of Section, 7.5.6 "Interpolating
Calibration Data" is set and the CW frequency is out of the correction range.
Normal correction “C3”
Interpolation correction “C3?”
Abnormal correction “C3!”
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