R&S ZNB, Руководство пользователя

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GUI Reference
R&S
®
ZNB/ZNBT
483 User Manual 1173.9163.02 ─ 55
The offset parameters depend on whether the circuit model is defined as "Agilent
Model" (see
Chapter 6.11.2.1, "Cal Connector Types Dialog" , on page 476):
●
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 5.5.2.1, "Calibration Standard
Types" , on page 160.
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 5.5.2.1, "Calibration Standard Types" , on page 160.
Remote command:
[SENSe:]CORRection:CKIT:<StandardType>
6.11.2.3 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 Chapter 5.5.5.3, "Characterization of Calibration Units" , on page 170.
Cal Softtool