When To Use Interpolated Error-Correction - Agilent Technologies 8719D User Manual

If you enter the opposite amount of electrical delay that was used by the
analyzer during calibration, then the short calibration standard till appear
to be "perfect." The open calibration standard has additional phase shift
caused by fringing capacitance. See "Calibration Considerations" in Chapter 6,
"Application and Operation Concepts. n
When you are performing error-correction for a system that has type-N test port connectors,
the softkey menus label the sex of the test port connector - not the calibration standard
connector. For example, the label .$%J,#KI~~4$~:~ refers to the short that will be connected to the
female test port.
You may want to use interpolated error-correction when you choose a subset of a frequency
range that you already corrected, when you change the number of points, or when you change
to CW. This feature also allows you to change the parameters in a 2-port correction, such as IF
bandwidth, power, or sweep time. The analyzer calculates the systematic errors from the errors
of the original correction.
The quality of the interpolated error-correction depends on the amount of phase shift and
amplitude change of the error coefficients between measurement points. If the phase shift
is <BOO per five measurement points, the interpolated error-correction can be a great
improvement over uncorrected measurement.
lb activate interpolated measurement correction, press Local] ~~~~~~~ g@mj#$; &tl .
When interpolation is in use, the notation CA will appear on the analyzer display.
interpolated error correction.
Sex
. . . . .
Optimizing Measurement Results 5-7