Measurements and Results
R&S
®
FSVA3000/ R&S
®
FSV3000
219User Manual 1178.8520.02 ─ 01
Different RBWs in overlapping ranges
If different RBWs are defined for the overlapping ranges, the following parameters from
the range with the smaller RBW are considered for both ranges:
●
RBW
●
VBW
●
Attenuation
●
Reference level
●
Transducer
●
Filter type
●
(proportional) sweep time
In the range with the higher RBW, the following offset is applied to the limit line:
-10*log(RBW
large
/ RBW
small
)
Table 7-12: Limit lines in overlapping ranges crossing the mid-frequency
Initial situation: overlapping ranges
Range 4 ("None") + Range 5 ("None") overlap and cross the
mid-frequency between sub blocks 1 and 2
Result: Subranges 4a and 5a are created left and right of the
mid-frequency;
For subrange 4a: limit line and parameters of range 4 apply
For subrange 5a: limit line and parameters of range 5 apply
Global SEM limit check
For the complete SEM measurement, which can consist of multiple sub blocks, only
one single limit check is performed. A single limit line is calculated according to the
individual range limit lines and the defined functions for overlapping ranges. The mea-
sured values are then compared with this single limit line. If the limit is exceeded in any
range, the result of the limit check is . "' failed!"
Spectrum Emission Mask (SEM) Measurement
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