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CDMA2000 Measurements
R&S
®
CMW-KM8xx/-KS8xx
725
User Manual 1173.9511.02 ─ 12
Fig. 5-2: Example: Segment with a configured segment length of 15 slots and different statistical
length for spectrum and modulation measurements
If two consecutive segments are measured at different RF frequencies or expected
powers, the R&S
CMW changes the analyzer settings in the last slot of the first seg-
ment, which can impair the accuracy of the measurement (see segments 1, 3 and 4 in
figure
).
Furthermore, if the R&S
CMW has to detect the frame start ("IF Auto Sync" trigger), the
first two slots of each segment are required for frame synchronization and the first slot
can be invalid as it may not be aligned with the frame start.
The maximum supported statistical length of each segment depends on the segment
length and the selected trigger:
●
statistical length
≤
segment length - 2
for "IF Auto Sync" trigger
●
statistical length
≤
segment length - 1
for other triggers
segment 2 and segment 3 have the same analyzer settings, so that the
last slot of segment 2 can be measured accurately.
If a slot cannot be measured accurately because of overflow (third slot of segment 1 in
figure
), low signal or synchronization error and "Measure On Exception" is
Off
(
CONFigure:CDMA:MEAS<i>:MEValuation:MOEXception
), the results of the
entire segment are
INValid
. The error cause is reported by the reliability indicator
and the segment reliability included in the measurement results.
General Description
深圳德标仪器
135-1095-0799