Rohde & Schwarz R&S FPS, Getting Started

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Operating the Instrument in Manual Mode
R&S
®
FPS
98 Getting Started 1319.3362.02 ─ 07
Channel-specific settings
Beneath the channel name, information on channel-specific settings for the mea-
surement are displayed in the
channel bar . A bullet next to the setting indicates
that user-defined settings are used, not automatic settings. A green bullet indi-
cates this setting is valid and the measurement is correct. A red bullet indicates
an invalid setting that does not provide useful results. Channel information varies
depending on the active application.
In the Spectrum application, the R&S FPS shows the following settings:
Table 6-7: Channel settings displayed in the channel bar in the Spectrum application
Ref Level Reference level
m.+el.Att Mechanical and electronic RF attenuation that has been set.
Ref Offset Reference level offset
SWT Sweep time that has been set.
If the sweep time does not correspond to the value for automatic
coupling, a bullet is displayed in front of the field. The color of the
bullet turns red if the sweep time is set below the value for auto-
matic coupling. In addition, the UNCAL flag is shown. In this case,
the sweep time must be increased.
Meas Time Measurement time, calculated from analysis bandwidth and num-
ber of samples (for statistics measurements)
RBW Resolution bandwidth that has been set.
If the bandwidth does not correspond to the value for automatic
coupling, a green bullet appears in front of the field.
VBW Video bandwidth that has been set.
If the bandwidth does not correspond to the value for automatic
coupling, a green bullet is displayed in front of the field.
AnBW Analysis bandwidth (for statistics measurements)
Compatible Compatible device mode (default not displayed)
Mode Indicates which sweep mode type is selected:
●
"Auto FFT": automatically selected FFT sweep mode
●
"Auto sweep": automatically selected swept sweep mode
●
"Sweep": manually selected frequency sweep mode
●
"FFT": manually selected FFT sweep mode
Common settings
In addition to the channel-specific settings, the channel bar above the diagram
also displays information on instrument settings that affect the measurement
results even though this is not immediately apparent from the display of the mea-
Understanding the Display Information