LTE PRACH Measurement
R&S
®
CMW-KM5xx/-KS5xx
757
User Manual 1173.9628.02 ─ 16
See also: "Markers" in the R&S
CMW user manual, chapter "System Overview"
4.2.9.9
Common View Elements
This section describes elements that are displayed in most views.
Tables
Most detailed views show tables providing a statistical evaluation of results obtained
from the measured preamble. The statistical values in the tables are calculated as fol-
lows:
●
Current:
Value of the result obtained in the last measurement interval. For some
modulation results the current RMS value (the average over all samples in the
measured preamble) and the current peak value (the peak of all samples in the
measured preamble) are available.
●
Average:
Average of all "Current" values referenced to the last statistics cycle.
●
Extreme, Min, Max:
Largest or smallest "Current" value that the R&S
CMW
obtained since the start of the measurement.
●
StdDev:
Standard deviation of all "Current" values since the start of the measure-
ment.
All statistical results (statistical tables and "Average" or "Max" traces) are calculated
according to the general rules for statistical results.
See also: "Statistical Results" in the R&S
CMW user manual, chapter "System Over-
view"
For description of individual table rows see
chapter 4.2.9.5, "Detailed Views: Power
Statistic Count
Progress bar for the measurement. During the first single shot after the start of the
measurement, the bar shows the number of measured preambles relative to the "Sta-
tistic Count". A filled progress bar indicates that the first shot is complete and the statis-
tical depth has been reached.
See also: "Statistical Settings" in the R&S
CMW user manual, chapter "System Over-
view"
Out of Tolerance
Percentage of measurement intervals (preambles) that were failed because they
exceeded the limits in the diagram.
Detected PRACH Frequency Offset
The PRACH frequency offset determines the position of the 6 preamble RBs within the
channel bandwidth. It is either detected automatically or selected manually, see
General Description
135-1095-0799