Rohde & Schwarz FPC Series, Руководство пользователя

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The Spectrum Application
R&S
®
FPC
120 User Manual 1178.4130.02 ─ 07
Figure 14-18: Indicator of vertical marker position
The marker coordinates are also shown in numerical form in the marker list above the
diagram area. The marker list opens when you activate the first marker.
Figure 14-19: 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 framed 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 14-19 , 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 14-19 , 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 ................................................................................................ 120
● Automatic Marker Positioning ............................................................................... 123
● Marker Search Ranges ......................................................................................... 124
14.9.1 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 .
Marker Configuration