Rohde & Schwarz 1323.0012.03, User Manual

Page: 461 / 1014

VNA GUI Reference
R&S
®
ZNL/ZNLE
461 User Manual 1178.5966.02 ─ 07
Offset Parameters
The entries in the upper part of the "View / Modify Cal Kit Standards" dialog specify the
offset parameters for the transmission lines of the selected calibration standard.
The offset parameters depend on whether the circuit model is defined as "Agilent
Model" (see
Chapter 9.12.2.2, "Cal Connector Types Dialog" , on page 454):
●
In an "Agilent 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 an Agi-
lent-type "Offset Loss" into a R&S
ZVR-type "Loss" and vice versa using the "Rel. Per-
mittivity εr" for the selected connector type.
See also description of the offset parameters in Chapter 8.5.2.1, "Calibration Standard
Types" , on page 247.
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:
–
"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"
●
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 Chap-
ter 8.5.2.1, "Calibration Standard Types" , on page 247.
Remote command:
[SENSe:]CORRection:CKIT:<StandardType>
9.12.2.4 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: [Cal] > "Characterize Cal Unit..."
Background information
Refer to Chapter 8.5.5.3, "Characterization of Calibration Units" , on page 258.
Cal Softtool
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