Chapter 4 183
Calibration
Changing the Calibration Kit Definition
4. Calibration
Defining parameters for standards
Figure 4-55 and Figure 4-56 show the parameters used in defining standards.
Figure 4-55 Reflection Standard Model (SHORT, OPEN, or LOAD)
Figure 4-56 Transmission Standard Model (THRU)
Z0 The offset impedance between the standard to be defined and the
actual measurement plane. Normally, this is set to the system’s
characteristic impedance.
Delay The delay that occurs depending on the length of the transmission line
between the standard to be defined and the actual measurement plane.
In an OPEN, SHORT, or LOAD standard, the delay is defined as
one-way propagation time (sec.) from the measurement plane to the
standard. In a THRU standard, it is defined as one-way propagation
time (sec.) from one measurement plane to the other. The delay can be
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