R&S ZVL
GUI Reference
Channel Menu
Operating Manual 1303.6580.32-06
250
The impedance for waveguides is frequency-dependent. If a waveguide line type is selected in the
Offset Model dialog, the Char. Impedance field is disabled and indicates "varies" instead of a
definite impedance value. Moreover no Loss or Offset Loss can be set.
Offset parameters and standard types
Offset parameters are used to describe all types of standards except the
Sliding Match
and the
Attenuation.
•
The
Sliding Match
is a one-port standard with variable load parameters (sliding load) and
unspecified length. The reference impedance is fixed and equal to the characteristic impedance of
the connector type. No load and offset parameters need to be set.
•
The
Attenuation
is a two-port standard which is fully matched in both directions (the reflection
factor at both ports is zero). No load and offset parameters need to be set.
Remote control:
[SENSe<Ch>:]CORRection:CKIT:<conn_type>:<std_type>
Modify Load
Specifies the load parameters for a particular calibration standard describing its terminal impedance. This
dialog is opened from the
Add or View / Modify Standard...
dialog (
Modify Load...
button).
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 a special value
(Open
for © so
that the inductance coefficients are irrelevant,
Short
for 0
V
,
Match
for the reference impedance of
the current connector type) or set 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.
Load parameters and standard types
Load parameters are used to describe all types of standards except a
Through,
a
Sliding Match,
aLineand
an
Attenuation.
•
The
Through
standard is a through-connection between two ports with minimum loss which is
taken into account by the
Offset Parameters.
•
The
Sliding Match
is a one-port standard with variable load parameters (sliding load), so there is
no fixed load model.
•
The
Line
standard is a line of variable length with minimum loss which is taken into account by the
Offset Parameters.
•
The
Attenuation
is a two-port standard which is fully matched in both directions (the reflection
