NB-IoT NPRACH Measurement
R&S
®
CMW-KM300/-KS300
346
User Manual 1178.5689.02 ─ 06
For power dynamics measurements, the measurement interval is completed when the
R&S
CMW has measured one preamble plus the preceding and the following power
OFF time.
The measurement provides independent statistic counts for modulation results and
power dynamics results. In single-shot mode and with a shorter modulation statistic
count, the modulation evaluation is stopped while the R&S
CMW still continues provid-
ing new power dynamics results.
Remote command:
CONFigure:NIOT:MEAS<i>:PRACh:SCOunt:PDYNamics
4.3.5
Trigger Settings
Access: "NPRACH" tab > "Config" hotkey > "Trigger" section.
The "Trigger" parameters configure the trigger system for the NB-IoT NPRACH mea-
surement.
Figure 4-15: Trigger settings
Trigger Source
Selects the source of the trigger event.
Only the measurement-specific trigger sources are listed here. Additional trigger sour-
ces are provided by the base software and by other applications like the GPRF genera-
tor. For a description of these trigger sources, refer to the documentation of the corre-
sponding software part.
"IF Power"
The measurement is triggered by the power ramp of the received pre-
ambles, converted into an IF signal. The trigger event coincides with
the rising or falling edge of the detected burst (i.e. the start or end of
the preamble for an NPRACH UL signal).
The minimum trigger gap must be large enough to ensure that the
measurement is not retriggered within a preamble. It must be small
enough to ensure that the trigger system is rearmed before the next
preamble starts. The default value is often appropriate, see
.
GUI Reference
135-1095-0799