Rohde & Schwarz CMU-K20, Operating Manual

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Non Signalling: Power Measurements CMU-K20/K21/K22/K23/K24
1115.6088.12 4.30 E-11
Continuous Display of minimum and maximum from all bursts already
measured. The
average value , however, is calculated according
to the rule in Chapter 3, section General Settings .
Remote control
no display mode set explicitly, the four measurement curves are accessible via
FETCh:ARRAy:POWer[:NORMal][:GMSK][:CURRent]?
FETCh:ARRAy:POWer[:NORMal][:GMSK]:MINimum?
FETCh:ARRAy:POWer[:NORMal][:GMSK]:MAXimum?
FETCh:ARRAy:POWer[:NORMal][:GMSK]:AVERage?
etc.
Statistic Count
The input field Statistic Count defines the length of the statistics cycles in bursts.
The settings 1 and OFF (press ON/OFF key) are equivalent. A statistics cycle
determines the duration of single-shot measurements.
Remote control
CONFigure:POWer[:NORMal][:GMSK]:CONTrol
<MODE>,1 ... 1000 | NONE
Filter
The input fields Filter determine which type of measurement filter is used for the P/t
measurements:
500 kHz Gauss Gauss filter with a 3-dB bandwidth of 500 kHz, recommended for
GMSK modulation
600 kHz Band Bandpass filter with a bandwidth of 600 kHz and steep edges,
recommended for 8PSK modulation
Both filters are in accordance with the conformance specification GSM 11.10.
Remote control
CONFigure:POWer[:NORMal][:GMSK]:FILTer G500 | B600
CONFigure:POWer[:NORMal]:EPSK:FILTer G500 | B600
CONFigure:POWer:MSLot:FILTer G500 | B600
Grid The Grid button switches the grid on or off in the graphical test diagram. By default,
the grid is switched on.
Remote control
CONFigure:POWer[:NORMal][:GMSK]:CONTrol:GRID ON | OFF
The following settings are application-specific:
P/t Normal
8PSK, P/t 8PSK,
Multislot –
Ref. Power Mode The Ref. Power Mode determines how the reference power, i.e. the 0-dB line in the
measurement diagram, is calculated. The setting is valid for both single-slot and
multislot measurements on 8PSK modulated signals.
Current The reference power depends on the Display Mode set. It is
equal to the average power of the Current measurement curve
(display mode Current) or to the average power of the Average
measurement curve (display mode Average, Maximum, or
Minimum) .
Average The reference power is equal to the average power of the
average measurement curve.
Data Compens. The reference power depends on the Display Mode set. It is
equal to the data-compensated average power of the Current
measurement curve (display mode Current) or to the data-
compensated average power of the Average measurement curve
(display mode Average, Maximum, or Minimum) .
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