User Manual

The Spectrum Application
R&S
®
FPC
115User Manual 1178.4130.02 ─ 05
Figure 12-18: Marker information in the diagram area and the marker list above the diagram
The marker list contains the following information.
●
Marker number and type.
"M" for normal markers, "D" for delta marker, including the marker number ("M1" to
"M6" and "D2" to "D6").
The currently selected marker is surrounded by a colored line.
●
Horizontal position of the marker.
The horizontal position is usually a frequency value. Zero span measurements
show the time on the x-axis. Normal markers indicate absolute values, delta marker
the (relative) distance to the first marker (reference marker).
In Figure 12-18, for example, the frequency for the first marker ("M1") is an abso-
lute value, while the frequency of the second marker, a delta marker, is displayed
as an offset to the first marker. Because the second marker is located to the left of
the first marker, it is a negative value.
●
Vertical position of the marker.
The vertical position is usually the measured level. Normal markers show the mea-
sured level as an absolute level in dBm. Delta markers indicate the level relative to
the first marker.
In Figure 12-18, for example, the level measured at delta marker 2 ("D2") is a few
dB less than the level measured for marker 1 ("M1").
● Marker Positioning.................................................................................................115
● Automatic Marker Positioning................................................................................117
● Marker Search Ranges......................................................................................... 118
12.9.1 Marker Positioning
You can position the markers on any trace point you like. The R&S FPC also provides
some useful tools to position markers automatically.
Positioning a marker
1. Press the "Mkr" key to open the marker menu.
Marker Configuration