R&S FSW Series, Руководство пользователя

Страница: 249 / 1450

Measurements and Results
R&S
®
FSW
249 User Manual 1173.9411.02 ─ 43
Table 7-13: 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