Rohde & Schwarz CMU-K20, Operating Manual

Page: 103 / 646

CMU-K20/K21/K22/K23/K24 Non Signalling: Power Measurements
1115.6088.12 4.25 E-11
Parameter line
Frame table
Fig. 4-7 Display of results (Power – P/Frame)
Settings
The essential settings are indicated in a parameter line above the test diagram. The
line is identical to the first parameter line of the test diagram in the
P/t Normal
GMSK application.
Results
The P/Frame application measures the average burst power in a particular timeslot
and over up to 256 consecutive TDMA frames. The average is taken over a section
of the useful part of the burst; it is not correlated to the training sequence. The time
slot number within the TDMA frame depends on the trigger time for the first
measurement. The number of frames measured is selected in the configuration
menu; see
Frame Count parameter on p. 4.32 .
A particular timeslot can be selected with an appropriate trigger condition. E.g., if
the power in the timeslot to be measured is clearly higher than the power in the
remaining seven timeslots, a power trigger (trigger settings
RF Power or IF Power)
can be used. Otherwise, use an appropriate external trigger signal.
The results are shown in a tabular overview. To be consistent with the numbering
of the timeslots within a TDMA frame, the measured slots are numbered starting
from 0. For more than 128 measured slots, the table can be scrolled using the
cursor keys. No limit check is performed.
Note: In Continuous measurements (Repetition = Continuous) , the results in
the table are updated row by row. After the end of each measurement
cycle the update re-starts in the first table row. To clearly distinguish
the current from the previous cycle, 4 strokes are inserted after the
most recent measurement result.
Remote control
READ:ARRay:POWer:FRAMe[:CURRent]?
READ[:SCALar]:POWer:FRAMe:FPOWer<nr>[:CURRent]?
FETCh:ARRay:POWer:FRAMe[:CURRent]?
SAMPle:ARRay:POWer:FRAMe[:CURRent]?
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