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NB-IoT Multi-Evaluation Measurement
R&S
®
CMW-KM300/-KS300
201
User Manual 1178.5689.02 ─ 06
Modulation measurements include EVM, magnitude error, phase error, I/Q and
inband emissions.
Spectrum measurements include spectrum emission and ACLR results.
To get the maximum measurement speed for these results, set "No. of Measure
Slots" to the number of slots in the transmission, including repetitions.
●
For the "Power Dynamics" results, one slot sequence delivers one set of results
(OFF ON OFF power).
The OFF power after the last allocated slot can only be measured, if all allocated
resource units are captured, including repetitions. To measure the complete result
sequence (OFF ON OFF), you must set "No. of Measure Slots" equal to or greater
than the number of slots in the transmission, including repetitions.
Examples
Assume that you have NPUSCH format 1 with 3 subcarriers. So there are 8 slots per
resource unit. One resource unit is allocated. The NPUSCH transmission is repeated
(repetitions = 2).
So your NPUSCH signal contains a continuous sequence of 16 allocated slots.
If you set "No. of Measure Slots" to 10, you get the following results:
●
The power monitor covers the first 10 slots. Measuring one slot sequence increa-
ses the statistic count by 1.
●
The first 10 slots contribute to the modulation and spectrum results. Measuring one
slot sequence increases the statistic count by 10.
●
The OFF power after the last allocated slot cannot be measured. Only the OFF
power before the first allocated slot and the ON power are measured. Measuring
one slot sequence increases the statistic count by 1.
Figure 3-1: Measured slots with No. of Measure Slots = 10
If you set "No. of Measure Slots" to 20, you get the following results:
●
The power monitor covers 20 slots (16 allocated slots plus 4 not-allocated slots).
Measuring one slot sequence increases the statistic count by 1.
●
The 16 allocated slots contribute to the modulation and spectrum results. Measur-
ing one slot sequence increases the statistic count by 16.
●
All power dynamics results are measured (OFF ON OFF). Measuring one slot
sequence increases the statistic count by 1.
General Description
深圳德标仪器
135-1095-0799