Chapter 7 SCPI
Measurement device configuration subsystems
254 WCDMA Options Version 6.20
CALC:RFTX:CORN:LIM:UPP 4,4,4,4,4,4,4,4
Limits for the modulation spectrum
In case of the modulation spectrum, 23 positions (i.e. frequencies) have been
predefined (see subsection Generator/Analyser for details).
With the related commands, the upper and lower limits for those 23 positions
may be set. Those limits are specified in dB.
Measurement device configuration subsystems
These subsystems provide commands for setting and reading out the states of
the various measurement devices of the 4400.
The following subsystems are available and described in this subsection.
RF measurement devices RFGenerator – The radio frequency generator provides both continuous signals
and bursts according to the specifications of the system (e.g. GSM) currently set.
The RFGenerator subsystem controls the accessible parameters of the RF gener-
ator, such as RF level, frequency etc.
RFANalyser – This subsystem gives access to the setup parameters of the RF
Analyser, such as frequency or trigger mode.
RFSPectrum – The commands of this subsystem are used to set span and resolu-
tion of the RF spectrum analyser.
AF measurement devices AFGenerator – The audio frequency generator provides signals for audio
measurements.
The AFGenerator subsystem controls the accessible parameters of the AF gener-
ator, such as output level, frequency, multitone signals etc.
AFANalyzer – The AF analyzer measures audio parameters. The related subsystem
gives access to the settings.
MS Power Supply – The MS power supply option is an (optional) external device
that simulates the power supply (battery) of a mobile under test. Together with
the 4400, it provides a lot of interesting performance data of the mobile station.
The related subsystem gives access to all relevant settings.
The RFGenerator
subsystem
The RFG subsystem controls the accessible parameters of the RF generator.
Important notes:
– The RF generator can only be used if all communication systems have been
switched off (and unloaded) before.
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