NB-IoT Multi-Evaluation Measurement
R&S
®
CMW-KM300/-KS300
240
User Manual 1178.5689.02 ─ 06
3.3.6.2
Frequency Error Limits
Access: "Config" hotkey > "Limits" > "Modulation" > "Frequency Error [ppm]" setting.
3GPP defines the required accuracy of the UE modulated carrier frequency in ppm of
the nominal carrier frequency. The requirements differ for nominal carrier frequencies
below and above 1 GHz.
Characteristics
Refer to 3GPP TS 36.521 V14.2.0, section...
Frequency
Specified limit
Frequency error
6.5.1F Frequency Error for category NB1
≤
1 GHz
> 1 GHz
< 0.2 ppm
< 0.1 ppm
Frequency error limit settings
The frequency error limits can be set in the configuration dialog.
Figure 3-21: Frequency error limit settings
Remote command:
CONFigure:NIOT:MEAS<i>:MEValuation:LIMit:FERRor
3.3.6.3
I/Q Origin Offset Limits
Access: "Config" hotkey > "Limits" > "Modulation" > "IQ Offset" section.
An I/Q origin offset is due to an additive sinusoid waveform at the frequency of the ref-
erence signal. The standard specifies the I/Q origin offset power limit as a function of
the output power of the UE transmitter (see "TX power" in the table).
Characteristics
Refer to 3GPP TS 36.521 V14.2.0, section...
TX power
Spec. limit
I/Q origin offset
6.5.2.2F Carrier leakage for category NB1
> 0 dBm
0 dBm to -30 dBm
< -30 dBm to -40 dBm
-24.2 dBc
-19.2 dBc
-9.2 dBc
I/Q origin offset limit settings
I/Q origin offset limits for three different TX power ranges can be set in the configura-
tion dialog.
Figure 3-22: I/Q origin offset limit settings
Remote command:
CONFigure:NIOT:MEAS<i>:MEValuation:LIMit:IQOFfset
GUI Reference
深圳德标仪器
135-1095-0799
