Channel Menu R&S
®
ZVA/ZVB/ZVT
1145.1084.12 4.228 E-6
Port assignment and gender
The standards are handled differently, depending on their port assignment:
• If the port assignment is not restricted, the gender belongs to the definition of polarized
standards. When the connector type and calibration kit is selected in the calibration wizard, the
analyzer checks whether the kit contains the necessary standard types and whether the
s
tandards have the right gender.
• Standards with restricted port assignment are assumed to have the right gender (the one
required for this port). In the View Modify Standard dialog, the Gender: input field is disabled. In
the calibration wizard, the analyzer checks whether the kit contains the necessary standard
types for the required ports. Instead of the gender, the port assignment is stored in the
calibration kit file.
This approach simplifies the definition of standards and helps to avoid inconsistencies.
Modify Offset
Specifies the offset parameters for the transmission lines of a particular calibration standard. This dialog
is opened from the Add or View / Modify Standard... dialog (Modify Offset... button).
The offset parameters depend on whether or not the circuit model is defined in Agilent Mode (see
Add/Modify Calibration Kit dialog):
• If Agilent Mode is active, then the standard is characterized by its Delay (in s), its characteristic
impedance Z
0
(in ) and its Offset Loss (in G/s).
• If Agilent Mode is switched off, then the standard is characterized by the ZVR-compatible
parameters Electrical Length (in m), its Char. Impedance (in ) and its Loss (in dB/sqrt(GHz)).
The loss is zero and not editable as long as the electrical length is zero.
Both parameter sets are closely related. The Electrical Length is proportional to the Delay; Z
0
corresponds to the Char. Impedance. Moreover the analyzer converts an Agilent-type Offset Loss into a
ZVR-type Loss and vice versa using the Relative Permittivity
r
for the connector type defined in the
Offset Model... dialog.
Offset parameters
The offset parameters have the following physical meaning:
• The Delay is the propagation time of a wave traveling through the standard. The Electrical
Length is equal to the Delay times the speed of light in the vacuum and is a measure for the
length of transmission line between the standard and the actual calibration plane. For a
waveguide with permittivity
r
and mechanical length L
mech
the following relations hold:
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