GUI Reference
R&S
®
ZNC
120
User Manual 1173.9557.02 ─ 13
For balanced ports it is possible to define separate complex reference impedances for
differential and for common mode.
Balanced
port
Single-
ended port
Differential mode
Z
ref
= Z
0d
Common mode
Z
ref
= Z
0c
DUT
Single-ended
(unbalanced) port
Z
ref, default
= Z
connector
2
3
}
1
2
Physical Port
no.
Logical Port
no.
Analyzer
1
Balanced port:
Common Mode / Differential Mode
Defines arbitrary reference impedances. "Common Mode" impedances are available for
single-ended ports; "Differential Mode" impedances for balanced ports only.
The default values for the balanced port reference impedances are derived from the (real)
default reference impedance of the physical analyzer ports (Z
0
= 50 Ω):
●
The default value for the differential mode is Z
0d
= 100 Ω = 2*Z
0
.
●
The default value for the common mode is Z
0c
= 25 Ω = Z
0
/2.
Remote command:
Renormalization according to Theory of
Selects the waveguide circuit theory for renormalization. The conversion formula of both
theories differ only if the reference impedance of at least one test port has a non-zero
imaginary part.
Refer to
chapter 3.3.5.4, "Reference Impedances"
Remote command:
4.2.1.4
Meas > Ratios
Selects ratios of wave quantities as measured quantities.
Background information
Refer to
chapter 3.3.4, "Wave Quantities and Ratios"
Trace Settings
