1xEV-DO Measurements
R&S
®
CMW-KM8xx/-KS8xx
239
User Manual 1173.9511.02 ─ 12
In "Once" mode a trigger event is only required to start the measurement. As a result
the entire range of segments (up to 200) 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 subframe of a seg-
ment is inaccurate, e.g. because of signal reconfiguration at the UE. Furthermore ret-
riggering from time to time can compensate for a possible time drift of the AT. The ret-
rigger flag of the first segment of the measurement is always ignored (implicitly set to
ON).
In the example shown below the "Segment" mode is enabled. The retrigger flag is OFF
for the second segment and ON for the third segment. Thus the measurement stops
when the first and second segment have been captured and waits for a trigger event
before capturing the third segment.
Remote commands
The list mode is essentially a single-shot remote control application. When a measure-
ment is initiated in list mode, all defined segments are measured once. Afterwards the
results can be retrieved using
FETCH
commands. The parameters in the figures are set
by means of the following remote control commands.
Table 3-1: List mode commands
Parameters
SCPI commands
Activate / deactivate list
mode
CONFigure:EVDO:MEAS<i>:MEValuation:LIST
Number of segments
CONFigure:EVDO:MEAS<i>:MEValuation:LIST:COUNt
Segment configuration
(slots per segment,
power, frequency, ...)
CONFigure:EVDO:MEAS<i>:MEValuation:LIST:SEGMent<no>:SETup
General Description
深圳德标仪器
135-1095-0799
