Concepts and features
R&S
®
ZNB/ZNBT
125
User Manual 1173.9163.02 ─ 62
normalized impedance or admittance) if they are used for transmission S-parame-
ters, ratios and other quantities.
●
For complex "Impedances", "Admittances", "Z-parameters", and "Y-parameters"
generally a Cartesian format or the polar format is suitable.
●
For the real valued
and DC measurement results, one of the Carte-
sian formats "Lin Mag" or "Real" should be used. In complex formats, real numbers
represent complex numbers with zero imaginary part.
The following table gives an overview of recommended display formats.
Complex dimensionless quan-
tities:
S-parameters and ratios
Complex quantities with dimensions:
Wave quantities, Z-parameters, Y-
parameters, impedances, admittan-
ces
Real quantities:
Stability Factors, DC 1 ... 4,
PAE
Lin Mag
ON
ON (default for Z-parameters, Y-param-
eters, impedances, admittances)
ON (default)
dB Mag
ON (default)
ON (default for wave quantities)
–
Phase
ON
ON
–
Real
ON
ON
ON
Imag
ON
ON
–
Unwrapped Phase
ON
ON
–
Smith
ON (reflection coefficients S
ii
)
–
–
Polar
ON
–
–
Inverted Smith
ON (reflection coefficients S
ii
)
–
–
SWR
ON (reflection coefficients S
ii
)
–
–
Delay
ON (transmission coefficients S
ij
)
–
–
The default formats are activated automatically when the measured quantity is
changed.
4.3
Measurement results
This section gives an overview of the measurement results of the network analyzer and
the meaning of the different measured quantities. All quantities can be selected in the
"Meas" softtool (function key Trace – [Meas]).
4.3.1
S-parameters
S-parameters are the basic measured quantities of a network analyzer. They describe
how the DUT modifies a signal that is transmitted or reflected in forward or reverse
direction. For a 2-port measurement, the signal flow is as follows.
Measurement results
