WILLTEK 4403 - Page 476

Appendix A SCPI Command Reference
AFANalyser subsystem
454 WCDMA Options Version 6.20
:AFANalyser:FILTer
:AFANalyser:SPECtrum:RLEVel
Syntax
:AFANalyser:FILTer <PredefExp>
Parameters
PredefExp is one of the following predefined expressions:
NONE|CCITt|CMESsage. Default is NONE.
Description
Selects the type of filter to be inserted between the signal input and the AF analyzer.
NONE means that there will be no filtering.
CCITt selects a speech filter as defined by CCITT regulations.
CMESsage is a speech filter according to US standards.
Query
The query form of this command returns the current setting. A query will return a
string, containing the short-form version of one of the predefined expressions
explained above.
Example
:AFANalyser:FILTer NONE
:AFAN:FILT?
Value returned: "NONE".
Syntax
:AFANalyser:SPECtrum:RLEVel <real1>
Parameters
real1 is a floating point real number. The minimum value for real1 is 0.001,
the maximum value is 30.0. The minimum resolution for real1 is 0.001. The
default value for real1 is 1.0.
Description
This command sets the level of the reference voltage (i.e. the 0 dB line of the AF spec-
trum display). The physical unit of real1 is volt if the signal source is AF in.
Notes
– When the signal source is RF in, the 0 dB line is interpreted as full scale.
– A typical audio standard is 0.775 volts for 0 dB.
Query
The query form of this command will return the current setting. The string delivered
back will contain one floating point real number.
Example
:AFANalyser:SPECtrum:RLEVel 13.0
:AFAN:SPEC:RLEV? Value returned: "13.0".