R&S ZNB Series User Manual page 519

®
R&S ZNB/ZNBT
The offset parameters depend on whether the circuit model is defined as "Keysight
Model" (see
●
In a "Keysight Model", a calibration standard is characterized by its "Delay" (in s),
its characteristic impedance "Z0" (in Ω) and its "Offset Loss" (in GΩ/s).
●
Otherwise the standard is characterized by the R&S ZVR-compatible parameters
"Electrical Length" (in m), "Char. Imp." (in Ω) and "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"; "Z0" corresponds to the "Char. Imp.". Moreover the analyzer converts a Key-
sight-type "Offset Loss" into a R&S ZVR-type "Loss" and vice versa using the "Rel.
Permittivity εr" for the selected connector type.
See also description of the offset parameters in
types",
Remote command:
[SENSe:]CORRection:CKIT:<StandardType>
Load Parameters
The entries in the lower part of the "View / Modify Cal Kit Standards" dialog specify the
load parameters for a particular calibration standard describing its terminal impedance.
The circuit model for the load consists of capacitance C which is connected in parallel
to an inductance L and a resistance R, both connected in series.
●
R is the constant resistive contribution. It is possible to select:
–
–
–
–
●
The fringing capacitance C and the residual inductance L are both assumed to be
frequency-dependent and approximated by the first four terms of the Taylor series
around f = 0 Hz.
See also description of the load parameters for the different standard types in
ter 4.5.2.1, "Calibration standard
Remote command:
[SENSe:]CORRection:CKIT:<StandardType>
5.11.2.3 Characterize Cal Unit dialog
The "Characterize Cal Unit" dialog displays the properties of the connected cal units,
provides control elements for characterization file management, and starts the charac-
terization wizard.
Access: Channel – [Cal] > "Cal Devices" > "Characterize Cal Unit..."
Background information
Refer to
User Manual 1173.9163.02 ─ 62
Chapter 5.11.2.1, "Cal Connector Types
on page 175.
"Open" for ∞ Ω (so that the inductance coefficients are irrelevant)
"Short" for 0 Ω
"Match" for the reference impedance of the current connector type
any resistance "R"
Chapter 4.5.5.3, "Characterization of calibration
dialog",
Chapter 4.5.2.1, "Calibration standard
types", on page 175.
GUI reference
Cal softtool
on page 512):
Chap-
units", on page 185.
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