Rohde & Schwarz 1145.1010.04/05/06, Operating Manual

Page: 252 / 813

Trace Menu R&S
®
ZVA/ZVB/ZVT
1145.1084.12 4.90 E-6
All marker formats are available irrespective of the measured quantity. The output values are calculated
by a simple conversion of a complex measurement result, where the marker format defines the
conversion rules. This flexibility in the calculation must be kept in mind when interpreting the results and
physical units displayed; see also Measured Quantities and Display Formats.
Short description of marker formats
The formats of the markers assigned to a trace are independent of each other and of the trace format
settings. The following table gives an overview on how a complex marker value z = x + jy is converted.
Marker Format Description Formula
dB Mag Magnitude of z in dB |z| = sqrt ( x
2
+ y
2
)
dB Mag(z) = 20 * log|z| dB
Lin Mag Magnitude of z, unconverted |z| = sqrt ( x
2
+ y
2
)
Phase Phase of z
(z) = arctan (y/x)
Real Real part of z Re(z) = x
Imag Imaginary part of z Im(z) = y
SWR (Voltage) Standing Wave Ratio SWR = (1 + |z|) / (1 – |z|)
Delay Group delay, neg. derivative of the phase response*
)
– d (z) / d
dB Mag and
Phase
Magnitude of z in dB and phase in two lines 20 * log|z| dB
arctan ( Im(z) / Re(z) )
Lin Mag and
Phase
Magnitude of z (unconverted) and phase in two lines |z|
arctan ( Im(z) / Re(z) )
Real and Imag Real and imaginary part of z in two lines x
y
Default (Trace) Marker format identical with trace format –
R + j X Unnormalized resistance and reactance; L or C in three lines
(Smith diagram)
R
X
L or C**
)
G + j B Unnormalized conductance and susceptance; L or C in three lines
(Inverted Smith diagram)
G
B
L or C**
)
*
)
The delay aperture is defined in the Trace – Format menu.
**
)
The equivalent inductances or capacitances L or C are calculated from the imaginary part of the
impedance according to
Remote control:
CALCulate<Ch/Tr>:MARKer<Mk>:FORMat ...
More Markers
Opens a submenu to create the markers numbered 4 to 10. The markers are analogous to marker no. 1
to 3.
Remote control: CALCulate<Ch/Tr>:MARKer<Mk>[:STATe] ON