R&S ZNB Series User Manual page 108

®
R&S ZNB/ZNBT
Frmt"), or formatted individually (Trace > [Marker] > "Marker Props" > "Marker For-
mat").
The available marker formats are defined for all measured quantities and trace formats
(see
tially, a marker format is simply a conversion between points on a complex-valued
trace (the raw measurement data) and the respective target format. This must be kept
in mind when interpreting the results and physical units displayed.
The following table describes how a complex marker value z = x + jy is converted. It
makes use of the polar representation z = x + jy = |z| e
|z| = ( x
Table 4-2: Marker formats
Marker Format
Default
Lin Mag
dB Mag
Phase
Delay
Real
Imag
SWR
dB Mag Phase
Lin Mag Phase
Real Imag
R + j X
or
R + j X series
R + j X parallel
User Manual 1173.9163.02 ─ 62
Chapter 4.2.3.3, "Measured quantities and trace
and φ(z) = arctan( y / x )
2 + y 2 ) 1/2
Description
●
For an individual marker, this means that
the marker is formatted according to the
default marker format of the related trace.
●
For a trace's default marker format, this
means that the default format is (dynamically)
adjusted according to the selected trace for-
mat.
Magnitude of z, unconverted
Magnitude of z in dB
Phase of z
Group delay, neg. derivative of the phase
response *)
Real part of z
Imaginary part of z
(Voltage) Standing Wave Ratio
Magnitude of z in dB and phase in two lines
Magnitude of z (unconverted) and phase in two
lines
Real and imaginary part of z in two lines
(Series) impedance:
Unnormalized (series) resistance, reactance, and
either inductance or capacitance, in three lines
***)
(Smith diagram)
***) Parallel impedance:
Unnormalized parallel resistance, reactance, and
either inductance or capacitance, in three lines
(Smith diagram)
Concepts and features
Screen elements
formats", on page 124). Essen-
jφ(z) , where
Formula
–
|z| = sqrt ( x 2 + y 2 )
2 2
|z| = sqrt ( x + y ) dB Mag(z) =
20 * log|z| dB
φ (z) = arctan (y/x)
– dφ(z) / dω, where ω denotes
the stimulus frequency
Re(z) = x
Im(z) = y
SWR = (1 + |z|) / (1 – |z|)
20 * log|z| dB arctan ( Im(z) /
Re(z) )
|z| arctan ( Im(z) / Re(z) )
x y
R
s
X
s
L or C **)
s s
R
p
X
p
L or C **)
p p
108