System Overview
R&S
®
ZVA
73
Quick Start Guide 1145.1090.62 ─ 10
●
The magnitude of the reflection coefficient of an open circuit (Y = 0, I = 0) is one, its
phase is zero.
3.2.4.6
Measured Quantities and Display Formats
The analyzer allows any combination of a display format and a measured quantity. The
following rules can help to avoid inappropriate formats and find the format that is ideally
suited to the measurement task.
●
All formats are suitable for the analysis of reflection coefficients S
ii
. The formats
"SWR", "Smith" and "Inverted Smith" lose their original meaning (standing wave ratio,
normalized impedance or admittance) if they are used for transmission S-parameters,
ratios and other quantities.
●
The complex "Impedances", "Admittances", "Z-parameters", and "Y-parameters" are
generally displayed in one of the Cartesian diagrams with linear vertical axis scale or
in a polar diagram.
●
The real "Stability Factors", "DC Inputs", and the "PAE" is generally displayed in a
linear Cartesian diagram ("Lin Mag" or "Real"). 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 Input
½, 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.
Screen Elements
