VNA Concepts and Features
R&S
®
ZNL/ZNLE
201
User Manual 1178.5966.02 ─ 07
●
To change the format of the active marker, select [TRACE] > "Marker" > "Marker
Properties" > "Marker Format".
●
To express the coordinates of the active marker relative to the reference marker,
activate the delta mode [TRACE] > "Marker" > "Marker Properties" > "Delta Mode".
Info Table
If you wish to reserve the full diagram space for traces, you can drag & drop the
marker info field to the info table.
The info table is hidden by default. To display it, open the "Display Lines" softtool
(hardkey [Display Lines]), activate its "Config" tab and select "Info Table" > "Show".
Marker Format
Marker values can be formatted according to the current trace format, according to the
default marker format of the related trace ("Format" > "Dflt Marker Frmt"), or formatted
individually ([Mkr] > "Marker Props" > "Marker Format").
The available marker formats are defined for all measured quantities and trace formats
(see
Chapter 8.2.3.3, "Measured Quantities and Trace Formats"
Essentially, a marker format is simply a conversion between points on a complex-val-
ued 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
j
φ
(z)
, where
|z| = ( x
2
+ y
2
)
1/2
and
φ
(z) = arctan( y / x )
Table 8-2: Marker formats
Marker Format
Description
Formula
Default
●
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.
–
Lin Mag
Magnitude of z, unconverted
|z| = sqrt ( x
2
+ y
2
)
dB Mag
Magnitude of z in dB
|z| = sqrt ( x
2
+ y
2
) dB Mag(z) =
20 * log|z| dB
Phase
Phase of z
φ (z) = arctan (y/x)
Delay
Group delay, neg. derivative of the phase
response
*)
– dφ(z) / dω, where ω denotes
the stimulus frequency
Real
Real part of z
Re(z) = x
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