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General Description
R&S
®
CMW-KM750/-KM751
15
User Manual 1173.9670.02 ─ 05
One list mode measurement can cover up to 500 segments with in total up to 1600 sub-
frames. Up to 6 uplink timeslots can be measured per subframe.
In list mode the R&S
CMW can measure modulation results and spectrum results. The
measured quantities can be enabled or disabled individually for each segment.
It is possible to limit the measurement to a number of active uplink slots (statistical length)
at the beginning of the segment. The "current" result of a segment refers to the last mea-
sured slot of the statistical length. Additional statistical values (average, maximum and
standard deviation) are calculated for the entire statistical length. The example below
shows a segment with 4 subframes, each containing 2 active UL slots. The statistical
length is set to 5 slots.
The statistical length and statistical values are not relevant for power monitor results. The
power monitor provides a result for each active uplink slot of all measured segments,
independent of the defined statistical length.
If a slot cannot be measured accurately, e.g. because of overflow, low signal or synchro-
nization error, the behavior depends on the parameter
. If it is set
to "Off", the measurement of a segment stops as soon as an error occurs and the mea-
surement continues with the next segment. If it is set to "On", the measurement continues
even when an error occurs. In both cases the reliability indicator for the measurement
and the reliability indicator for the segment indicate the occurred error. Both reliability
indicators are included in the measurement results.
Trigger modes
A list mode measurement can either be triggered only once, or it can be retriggered at
the beginning of specified segments.
In "Once" mode a trigger event is only required to start the measurement. As a result the
entire range of segments is measured without additional trigger event. The trigger is
rearmed after the measurement has been finished. Specified retrigger flags are ignored.
The "Once" mode is recommended for UL signals with accurate timing over the entire
range of segments.
In "Segment" mode the retrigger flag of each segment is evaluated. It defines whether
the measurement waits for a trigger event before measuring the segment, or not. Ret-
riggering the measurement is recommended if the timing of the first slot of a segment is
Multi Evaluation List Mode