WILLTEK 4403 - Page 460

Appendix A SCPI Command Reference
RFGenerator subsystem
438 WCDMA Options Version 6.20
:RFGenerator:WCDMa:MODulation:FM:MFRequency
:RFGenerator:WCDMa:MODulation:FM:FDEViation
:RFGenerator:WCDMa:MODulation:WCDMa:BITPattern
Description
This command selects the type of modulation to be used on the RF output signal.
NONE
means that the output signal will not be modulated, while FM means that the
output signal will be FM modulated and WCDMa
means that the Willtek 4400 will
provide a WCDMA-like RF output signal
.
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
:RFG:WCDMA:MOD WCDMa
:RFG:WCDMA:MOD?
Value returned in this example
"WCDM".
Syntax
:RFGenerator:WCDMa:MODulation:FM:MFRequency <real1>
Parameters
real1 is a floating point real number.
The minimum value for
real1 is 1,000, the maximum value is 100,000. The
minimum resolution for real1 is 10. The default value for real1 is 50,000
.
Description
This command sets the modulation frequency for the generated FM signal.
Query
The query form of this command will return the current setting. The string delivered
back will contain one integer.
Example
:RFG:WCDMA:MOD:FM:MFR 30000
:RFG:WCDMA:MOD:FM:MFR?
Value returned in this example: 30000
.
Syntax
:RFGenerator:WCDMa:MODulation:FM:FDEViation <real1>
Parameters
real1
is a floating point real number.
The minimum value for real1
is 250,000, the maximum value is 1,000,000.
The minimum resolution for real1 is 10. The default value for real1 is
500,000.
Description
This command sets the Modulation Frequency for the generated FM signal.
Query
The query form of this command will return the current setting. The string delivered
back will contain one integer.
Example
:RFG:WCDMA:MOD:FM:FDEV 300000
:RFG:WCDMA:MOD:FM:FDEV?
Value returned in this example: 300000
.
Syntax
:RFGenerator:WCDMa:MODulation:WCDMa:BITPattern
<PredefExp>
Parameters
PredefExp
is one of the following predefined expressions:
PRBS9|PRBS15|PRBS23|ALLZero|ALLOne|ONEZero|ZEROone.
The default is PRBS9.
Description
This command sets the bit pattern for the WCDMA signal.