Appendix A SCPI Command Reference
CONFigure subsystem
298 WCDMA Options Version 6.20
:CONFigure:COUPloss:STATe
Description
Selects the type of communication system to be used.
NONe means that there is no system loaded and that there will be no basic generator
or analyzer functionality available. This parameter may be used to cancel all RF radia-
tion from the Willtek 4400.
GENana will make the Willtek 4400 work as a generator and analyzer for circuit-
switched GSM signals. This setting is identical to GCGenana. Because of the imple-
mentation of packet-data channels, we recommend not to use the GENana parame-
ter in new programs but the GCGenana parameter as it clearly marks that the
Willtek 4400 will generate and analyze circuit-switched GSM signals only with this
setting.
GCGenana will set up the Willtek 4400 as a generator and analyzer for circuit-
switched GSM signals (including multislot/HSCSD). Generator/analyzer means that
there will be no call setup and therefore, all measurements will be asynchronous.
GPGenana will make the Willtek 4400 work as an asynchronous generator and ana-
lyzer for all kinds of GSM signals (circuit-switched signals in single or multislot mode
as well as packet-data channels (PDTCH in GPRS)).
GSM will set up the Willtek 4400 as a test set for circuit-switched GSM systems
(including multislot/HSCSD). All tests performed with this setting require a call setup.
Therefore, this test mode is called the 'call mode'.
GPRS will bring the Willtek 4400 into call mode for standard GSM and GPRS sys-
tems. This means that this parameter will enable testing of all kinds of GSM signals
(circuit-switched signals in single or multislot mode as well as packet-data channels
(GPRS)).
Note: Please keep in mind that you have to select the communication system first
when working with SCPI, as the default of this command is NONe.
Query
The query form of this command will return the current setting. The string delivered
back will contain the short-form version of one of the predefined expressions
explained above.
Example
:CONFigure:CSYStem GSM
:CONF:CSYS?
Value returned: "GSM".
Syntax
:CONFigure:COUPloss:STATe <PredefExp1>
Parameters
PredefExp1 is one of the following predefined expressions: ON|OFF.
Default is OFF.
Description
This command switches the use of a coupling loss table either on or off.
Note: Coupling loss tables are used to compensate e.g. losses in cables. For more
details, please refer to section Coupling Loss.
Query
The query form of this command will return the current setting. The string delivered
back will contain one predefined expression as explained above.
Example
:CONFigure:COUPloss:STATe ON
:CONF:COUP:STAT?
Value returned: "ON"
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