Rohde & Schwarz R&S CMW-KM300, User Manual

Page: 343 / 388

NB-IoT NPRACH Measurement
R&S
®
CMW-KM300/-KS300
343 User Manual 1178.5689.02 ─ 06
Repetition .................................................................................................................... 343
Stop Condition .............................................................................................................343
Measure on Exception ................................................................................................ 343
Channel Bandwidth ..................................................................................................... 343
NPRACH Preamble Format ........................................................................................ 344
Number of Preambles ................................................................................................. 344
Period of Preambles ....................................................................................................344
Repetition
Defines how often the measurement is repeated if it is not stopped explicitly or by a
failed limit check.
●
Continuous: The measurement is continued until it is explicitly terminated. The
results are periodically updated.
●
Single-Shot: The measurement is stopped after one measurement cycle.
Single-shot is preferable if only a single measurement result is required under fixed
conditions, which is typical for remote-controlled measurements. The continuous mode
is suitable to monitor the evolution of the measurement results and to observe how
they depend on the measurement configuration, which is typically done in manual con-
trol. The reset/preset values therefore differ from each other.
Remote command:
CONFigure:NIOT:MEAS<i>:PRACh:REPetition
Stop Condition
Specifies the conditions for an early termination of the measurement:
●
"None": The measurement is performed according to its "Repetition" mode and
"Statistic Count", irrespective of the limit check results.
●
"On Limit Failure": The measurement is stopped when one of the limits is excee-
ded, irrespective of the repetition mode set. If no limit failure occurs, it is performed
according to its "Repetition" mode and "Statistic Count". Use this setting for mea-
surements that are intended for checking limits, e.g. production tests.
Remote command:
CONFigure:NIOT:MEAS<i>:PRACh:SCONdition
Measure on Exception
Specifies whether results that the measurement identifies as faulty or inaccurate are
rejected. A faulty result occurs, for example, when an overload is detected. In remote
control, the cause of the error is indicated by the "reliability indicator".
●
Off: Faulty results are rejected. The measurement is continued. The statistical
counters are not reset. Use this mode to ensure that a single faulty result does not
affect the entire measurement.
●
On: Results are never rejected. Use this mode for development purposes, if you
want to analyze the reason for occasional wrong transmissions.
Remote command:
CONFigure:NIOT:MEAS<i>:PRACh:MOEXception
Channel Bandwidth
Displays the channel bandwidth. The bandwidth is fixed for NB-IoT signals.
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