Rohde & Schwarz CMU-K20, Operating Manual

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Non Signalling: Power Measurements CMU-K20/K21/K22/K23/K24
1115.6088.12 4.26 E-11
e) P/Slot Graph
The results displayed in the measurement menu Power , application P/Slot Graph, can be divided into
two groups:
•
Settings
•
Measurement results, i.e. the average burst power in all eight slots of a TDMA frame
The measurement results are indicated in a parameter line, the test diagram and a table:
Parameter line
Test diagram
Slot table
Fig. 4-8 Display of results (Power – P/Slot menu)
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/Slot application measures the average burst power in eight consecutive time
slots. The average is taken over a section of the useful part of the burst; it is not
correlated to the training sequence. The time slots are numbered 0 to 7; however,
this does not mean that they all belong to the same TDMA frame (slot 0 to 7).
A particular timeslot can be selected as timeslot 0 with an appropriate trigger
condition. E.g., if the power in one timeslot 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 eight values are shown in a bar graph and in a tabular overview below. No limit
check is performed.
Remote control
READ:ARRay:POWer:SLOT[:CURRent]?
FETCh:ARRay:POWer:SLOT[:CURRent]?
SAMPle:ARRay:POWer:SLOT[:CURRent]?
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