R&S FSW Series, Руководство пользователя

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Measurements and Results
R&S
®
FSW
240 User Manual 1173.9411.02 ─ 43
7.6.4.1 Ranges and Range Settings
In the Spectrum Emission Mask measurements, a range defines a segment for which
you can define the following parameters separately:
●
Start and stop frequency
●
RBW
●
VBW
●
"Sweep Time"
●
"Sweep Points"
●
Reference level
●
Attenuator settings
●
Preamplifier settings
●
Transducer settings
●
Limit values
Via the sweep list, you define the ranges and their settings. For details on settings,
refer to
Chapter 7.6.5.1, "Sweep List" , on page 251.
For details on defining the limits (masks), see Chapter 7.6.4.2, "Limit Lines in SEM
Measurements" , on page 242.
Range definition
After a preset, the sweep list contains a set of default ranges and parameters. For
each range, you can change the parameters listed above. You can insert or delete
ranges.
The changes of the sweep list are only kept until you load another parameter set (by
pressing [PRESET] or by loading an XML file). If you want a parameter set to be avail-
able permanently, create an XML file for this configuration (for details refer to
"How to
save a user-defined SEM settings file" on page 270).
If you load one of the provided XML files, the sweep list contains ranges and parame-
ters according to the selected standard.
Reference range
The range containing the center frequency is defined as the reference range for all
other ranges in the sweep list. All range limits are defined in relation to the reference
range. The TX power used as a reference for all power level results in the result sum-
mary is also calculated for this reference range. You can define whether the power
used for reference is the peak power level or the integrated power of the reference
range. In the "Sweep List", the reference range is highlighted in blue and cannot be
deleted.
Rules
The following rules apply to ranges:
●
The minimum span of a range is 20 Hz.
●
The individual ranges must not overlap (but can have gaps).
Spectrum Emission Mask (SEM) Measurement