Appendix A SCPI Command Reference
RFSPectrum subsystem
WCDMA Options Version 6.20
445
RFSPectrum subsystem
The RFSP subsystem controls the accessible parameters of the RF modulation
spectrum analyzer.
:RFSPectrum:WCDMa:MSPectrum:SPAN
:RFSPectrum:WCDMA:MSPectrum:RESolution
Parameters
real1 is an integer number. The minimum value is -17.000 sec, the maximum
value 50.000 sec. The initial default is 0.000 sec. real2 to realn are real
numbers. The minimum value is 0.000 sec, the maximum value 17.000 sec.
The initial default is 5.000 sec. Minimum are 2 parameters RP0, RP1.
Description
The reference points RP0..RPn define timing intervals for measuring and not mea-
suring. The timing interval RP0 will be not measured, after that alternating measure
and non-measure intervals follow. Every timing interval RPn; RPn+1 can be
between 0.0 sec and 17.000 sec. Max. length of sequence due to ACQ-RAM:
17.000 sec (without consideration of the first RP0-interval). RP0:
-17000 sec to +50000 sec => RP0 correspond to "PRE-TRIGGER" in
zerospan graphic display. RP1..RPn: 0.0 sec to 17.000 sec => RP1 corre-
spond to "Sweep-Time" in zerospan graphic display. Sum of RP1 to RPn must be =<
17.000 sec.
Query
The query form of this command will return the current settings.
Example
:RFAN:WCDM:ZSP:REFP
0,1.000,2.000,3.000,4.000,5.000,6.000,7.000,8.000,
9.000,10.000,11.000,12.000,13.000,14.000,15.000,16.000,
17.000
Syntax
:RFSPectrum:WCDMa:MSPectrum:SPAN <PredefExp>
Parameters
PredefExp is one of the following predefined expressions: SP10|SP6
.
The default is SP10.
Description
Sets the span (i.e. the spectral bandwidth) of the modulation spectrum analyzer.
SP6
will set a span of 6 MHz (+/- 3 MHz),
SP10
will set a span of 10 MHz (+/- 5 MHz).
Query
The query form of this command returns the current setting. A query will return a
string, containing one of the predefined expressions explained above.
Example
:RFSP:WCDMA:MSP:SPAN SP10
:RFSP:WCDMA:MSP:SPAN?
Value returned in this example
SP10.
Syntax
:RFSPectrum:WCDMA:MSPectrum:RESolution <PredefExp>
Parameters
PredefExp
is one of the following predefined expressions: RES15|RES30.
The default is RES15.
Description
Sets the spectral resolution of the modulation spectrum analyzer.
RES30
will set a resolution of 30 kHz.
RES15
will set a resolution of 15 kHz.
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