WILLTEK 4403 - Page 409

Appendix A SCPI Command Reference
CALCulate Subsystem
WCDMA Options Version 6.20
387
:CALCulate:AFANalyser
:FREQuency:LIMit:LOWer[:DATA]
:CALCulate:AFANalyser
:DISTortion:LIMit[:FAIL]?
:CALCulate:AFANalyser
:DISTortion:AFAN:DIST:LIMit:STATe
Example
:CALC:AFAN:FREQ:LIM:UPP 10000
Sets the upper limit of the audio frequency measurement to 10 kHz.
Syntax
:CALCulate:AFANalyser
:FREQuency:LIMit:LOWer[:DATA] <real1>
Parameters
real1 is a floating point real number. The minimum value is 0.0, the maximum is
20,000.0. The minimum resolution possible is 1.0, the default value is
1,000.0.
Description
Sets the lower limit for the AF frequency measurement. The physical dimension of the
number stated is Hertz.
Query
The query form of this command is not available.
Example
:CALC:AFAN:FREQ:LIM:LOW 950
Sets the lower limit of the audio frequency measurement to 950 Hz.
Syntax
:CALCulate:AFANalyser
:DISTortion:LIMit[:FAIL]?
Parameters
There are no parameters.
Description
There is solely a query form of this command available.
Query
This command delivers one boolean number, indicating whether the user-definable
limits of the distortion measurement were violated by a measurement result value or
not.
A 0 means that all measurement result values were within the limits set, while a 1
indicates that at least one measurement result value did violate at least one of the
limits.
The limits can be set using the commands described below.
Notes
– The distortion measurement is carried through on the third harmonic of a 1 kHz
sine wave.
– All audio measurements require the Audio Option to be installed on your Willtek
4400.
Example
:MEAS:ARRay:AFAN:DIST 10
:CALC:AFAN:DIST:LIM?
String returned: "1"
This string delivered back indicates that there was a violation of the limits set.
Syntax
:CALCulate:AFANalyser
:DISTortion:LIMit:STATe <PredefExp>
Parameters
PredefExp is one of the following predefined expressions: ON|OFF. Default is ON.