5 CALIBRATION AND CALIBRATION KIT
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5.1.7.3 Methods of Calibration Standard Defining
The Analyzer provides two methods of defining a calibration standard:
§calibration standard model (See section 5.1.7.4),
§table of S-parameters (See section 5.1.7.5).
The calibration standards defined by the table of S-parameters are called Data-Based
standards.
Besides, each calibration standard is characterized by lower and upper values of the
operating frequency. In the process of calibration, the measurements of the calibration
standards outside the specified frequency range are not used.
5.1.7.4 Calibration Standard Model
A model of a calibration standard presented as an equivalent circuit is used for
determining of S-parameters of the standard. The model is employed for standards of
OPEN, SHORT, FIXED LOAD, THRU/LINE types.
One-port model is used for the standards OPEN, SHORT, and FIXED LOAD (See
figure 5.4).
Figure 5.4 One-port standard model
Offset (transmission line):
§Z0 – impedance;
§T – propagation delay;
§Rloss – loss.
Lumped parameters:
§OPEN – conductance C;
§SHORT – inductance L;
§LOAD – impedance RL.
Calibration
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