Rohde & Schwarz CMU-K20, Руководство по эксплуатации

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CMU-K20/K21/K22/K23/K24 Non Signalling: Connection Control
1115.6088.12 4.75 E-11
Analyzer Level –
RF Attenuation The RF Attenuation parameter defines how the RF analyzer of the CMU is tuned to
meet the requirements of the current measurement type. In general, a compromise
between the acceptable noise level in the displayed result and the contribution of
internally generated distortion must be reached.
Normal Mixer level in normal range,
Low noise Mixer level enhanced by +10 dB (full dynamic range of CMU,
therefore recommended for
Power and Spectrum
measurements),
Low distortion Mixer level reduced by –10 dB (high intermodulation spacing,
therefore recommended for
Modulation measurements).
The Attenuation setting permits the CMU to be adapted to the requirements of the
measurement. The advantages and disadvantages of the settings Low noise and
Low distortion are listed in the following table.
Advantages Disadvantages
Low noise Low noise
high dynamic range No RF overdrive reserve
Risk of intermodulation
Low distortion High intermodulation spacing Lower dynamic range
Remote control
[SENSe:]LEVel:ATTenuation NORMal | LNOise | LDIStortion
Meas. Control –
Multi Slot –
Trigger Slot
Offset Trig. Slot Offset defines a delay time (integer number of GSM timeslots) between
the trigger time and the timeslot that is measured in all Multislot configurations; see
Fig. 4-3 on p. 4.18 .
Remote control
CONFigure:RFANalyzer:MCONTrol:TSOFfset 0 to 7
Analyzer
Settings –
Template PCL
Template PCL sets a power control level to correct the limit lines. See Template
PCL softkey on p. 4.13 .
Remote control
CONFigure:RFANalyzer:TPCL <PCL>
Generator Settings (Connection Control – Generator)
The Generator tab controls and configures the RF generator. The CMU provides a softkey-oriented
version of the Generator tab and a table-oriented version with extended functionality. The Generator
hotkey toggles between the two versions if it is pressed repeatedly.
Softkey-Oriented Version
The softkey-oriented version of the Generator tab provides the following RF generator settings:
•
Generator control and level in the used and unused timeslots (measurement control softkey RF
Generator )
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