NB-IoT Multi-Evaluation Measurement
R&S
®
CMW-KM300/-KS300
244
User Manual 1178.5689.02 ─ 06
The relative ACLR limit must be evaluated only, if the measured adjacent channel
power is greater than -50 dBm (absolute limit). In that case, the ACLR must be greater
than the limits listed in the following table.
Characteristics
Refer to 3GPP TS 36.521 V14.2.0, section...
Relative limit
ACLR
6.6.2.3F Adjacent Channel Leakage power Ratio for category
NB1
GSM: 19.2 dB
UTRA: 36.2 dB
ACLR limit settings
The limits can be set in the configuration dialog.
Figure 3-26: ACLR limit settings
The default settings are suitable to check the 3GPP requirements. The relative limits
are only evaluated, if the corresponding absolute limit is exceeded. If you disable an
absolute limit, the corresponding enabled relative limit is always evaluated.
Remote command:
CONFigure:NIOT:MEAS<i>:MEValuation:LIMit:ACLR:GSM
CONFigure:NIOT:MEAS<i>:MEValuation:LIMit:ACLR:UTRA
3.3.6.8
Power Dynamics Limits
Access: "Config" hotkey > "Limits" > "Power" > "Dynamics" section.
Transmission at excessive uplink power increases interference to other channels. A too
low uplink power increases transmission errors. 3GPP defines a general ON/OFF time
mask. The mask contains limits for the UL power in slots not used for transmission
(transmit OFF power), slots used for transmission (transmit ON power) and the power
ramping between them.
Three power values must be measured:
●
ON power, at the beginning of the first allocated resource unit
●
OFF power before the ON power
●
OFF power after the last allocated resource unit
The measurement duration for the three powers depends on the subcarrier spacing.
For 3.75 kHz subcarrier spacing, each power must be measured for 2 ms (one slot).
For 15 kHz subcarrier spacing, each power must be measured for 1 ms (two slots).
There is a transient period of 20 µs at the beginning of the first allocated resource unit
and after the last allocated resource unit. These transient periods are excluded from
the measurement.
For 3.75 kHz subcarrier spacing, the 2304 T
s
gap at the end of each slot, when the UE
is not transmitting, is also excluded.
GUI Reference
深圳德标仪器
135-1095-0799