R&S ZNB Series User Manual page 175

®
R&S ZNB/ZNBT
The standards are grouped into several types (Open, Through, Match,...) correspond-
ing to the different input quantities for the analyzer's error models. The standard type
also determines the equivalent circuit model used to describe its properties. The circuit
model depends on several parameters that are stored in the cal kit file associated with
the calibration kit.
As an alternative to using circuit models, it is possible to describe the standards with S-
parameter tables stored in a file.
The analyzer provides many predefined cal kits but can also import cal kit files and cre-
ate kits:
●
●
Calibration kits and connector types are global resources; the parameters are stored
independently and are available irrespective of the current recall set.
4.5.2.1 Calibration standard types
The following table gives an overview of the different standards and their circuit models
(offset and load models).
Table 4-8: Calibration standard types
Standard Type Characteristics
Open Open circuit (one-port)
Short Short circuit (one-port)
Offset short Short circuit with added electrical length offset, for
waveguide calibration (one-port)
Match Matched broadband termination (one-port)
Sliding match One-port standard consisting of an air line with a
movable, low-reflection load element (sliding load)
Reflect Unknown mismatched standard (one-port)
Through Through-connection with minimum loss (two-port)
Line1, Line 2 Line(s) for TRL calibration with minimum loss (two-
port)
Attenuation Fully matched standard in both directions (two-
port; the reflection factor at both ports is zero)
Symm. network Unknown mismatched reflection-symmetric stan-
dard (two-port)
User Manual 1173.9163.02 ─ 62
A selection of predefined kits is available for all connector types. The parameters of
these kits are displayed in the "View / Modify Cal Kit Standards" dialog, however, it
is not possible to change or delete the kits.
Imported and user-defined kits can be changed in the "Calibration Kits" dialog and
its various subdialogs.
Concepts and features
Ideal Standard Offset Model Load Model
∞ Ω ☑
☑
0 Ω
☑
0 Ω
☑
Z (characteristic
0
impedance of the
connector type)
– –
∞ Ω ☑
☑
–
☑
–
– –
☑
–
Calibration
☑
☑
☑
☑
–
☑
–
–
–
☑
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