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NB-IoT Multi-Evaluation Measurement
R&S
®
CMW-KM300/-KS300
229
User Manual 1178.5689.02 ─ 06
Remote command:
CONFigure:NIOT:MEAS<i>:RFSettings:ENPower
(SA)
CONFigure:NIOT:SIGN<i>:RFSettings:ENPMode
(CSP)
CONFigure:NIOT:SIGN<i>:RFSettings:ENPower
(CSP)
User Margin
Margin that the measurement adds to the expected nominal power to determine its ref-
erence power (reference level). The margin is typically used to account for the known
variations of the RF input signal power, for example, the variations due to a specific
channel configuration.
The variations (crest factor) depend on the signal parameters, in particular the modula-
tion scheme. If the "Expected Nominal Power" is set to the peak power during the mea-
surement, a 0 dB user margin is sufficient.
In the standalone (SA) scenario, this parameter is controlled by the measurement. In
the combined signal path (CSP) scenario, it is controlled by the signaling application.
Remote command:
CONFigure:NIOT:MEAS<i>:RFSettings:UMARgin
(SA)
CONFigure:NIOT:SIGN<i>:RFSettings:UMARgin
(CSP)
Mixer Level Offset
Varies the input level of the mixer in the analyzer path. A negative offset reduces the
mixer input level. A positive offset increases the mixer input level. Optimize the mixer
input level according to the properties of the measured signal.
Mixer level
offset
Advantages
Possible shortcomings
< 0 dB
Suppression of distortion (e.g. of the inter-
modulation products generated in the
mixer)
Lower dynamic range (due to smaller sig-
nal-to-noise ratio)
> 0 dB
High signal-to-noise ratio, higher dynamic
range
Risk of intermodulation, smaller overdrive
reserve
In the standalone (SA) scenario, this parameter is controlled by the measurement. In
the combined signal path (CSP) scenario, it is controlled by the signaling application.
Remote command:
CONFigure:NIOT:MEAS<i>:RFSettings:MLOFfset
(SA)
CONFigure:NIOT:SIGN<i>:RFSettings:MLOFfset
(CSP)
3.3.4
Measurement Control Settings
The "Measurement Control" parameters configure the scope of the NB-IoT multi-evalu-
ation measurement.
While the combined signal path scenario is active, some of the measurement control
parameters display values determined by the controlling signaling application. For
GUI Reference
深圳德标仪器
135-1095-0799