R&S ZNB Series User Manual page 285

®
R&S ZNB/ZNBT
Port activation on demand
If a requested result involves disabled ports, but could be calculated if those ports were
configured as single-ended ports with "logical port number = physical port number",
then the required logical port configuration is performed automatically.
For example, with P1 assigned to L1 and P2 disabled, S21 could be measured if P2
would be assigned to L2.
5.2.1 S-Params tab
Selects S-parameters as measured quantities. 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. S-parameters (and derived
quantities such as Y- and Z-parameters) fully characterize a linear DUT.
Background information
Refer to
5.2.1.1 Controls on the S-Params tab
S-Parameter (selector)
Selects an
Single-ended (unbalanced) S-parameters are referred to as S<out>< in>, where <out>
and <in> denote the output and input logical port numbers, respectively.
If entered manually, <out> and <in> must be expressed using the same number of dig-
its. I.e. for <out>=10 and <in>=9 you can specify S<out>< in> as S1009 or S010009,
but not as S109.
In presence of balanced ports, standard S-parameters are defined in the form
S<m_out><m_in><out><in>, where output mode <m_out> and input mode <m_in> can
be one of:
●
d (differential, balanced)
●
c (common, balanced)
User Manual 1173.9163.02 ─ 62
Chapter 4.3.1, "S-parameters",
S-parameters as a measured quantity for the active trace.
on page 125.
GUI reference
Meas softtool
285