Appendix A SCPI Command Reference
FETCh Subsystem
358 WCDMA Options Version 6.20
:FETCh:AFANanlyser:ALL?
Query
The query form of this command will return the latest measurement result values of
the sequence of AF measurements as specified with the :CONF:MEAS:GRO:AFAN
command and measured with the :MEAS[ARRay]:AFAN:GRO command. The
string returned contains the related measurement result values, separated by com-
mas. All measurement result values are floating point real numbers. The number of
measurement result values handed back depends on the number and type of mea-
surements defined with the :CONF:MEAS:GRO:AFAN command.
The order of the measurement result values within the result string is as described
below for the :FETCh:AFANalyser:ALL command.
Example
:CONF:MEAS:GRO:AFAN SIN,FREQ
:MEAS:AFAN:GRO
:FETCh:AFAN:GRO?
In this example, the group of measurements is defined by a SINAD measurement
combined with an audio frequency measurement. The values returned are:
"1000.0,53.5".
Because of the internal order (see description of the command below), the first mea-
surement result value delivered back is the audio frequency, the second one the
SINAD.
Syntax
:FETCh:AFANanlyser:ALL?
Parameters
There are no parameters.
Description
There is solely a query form of this command available.
Query
The query form of this command will return the latest measurement result values of
the :MEAS[:ARRay]:AFAN:ALL measurement in a string. All measurement
result values of the AF measurements will be floating point real numbers, separated
by commas.
The order of the measurement result values within the result string is as follows:
1. ACVPeakp, representing the AC peak-to-peak voltage of the AF signal, expressed
in V(pp)
2. ACVRms, representing the rms-valued AC voltage of the AF signal, expressed in
V(rms),
3. DCVRms, representing the rms-valued AC voltage on an applied DC signal,
expressed in V(rms),
4. FREQuency, representing the audio frequency, expressed in Hertz,
5. DISTortion, representing the third-harmonic distortion of the applied sine-
wave AF signal (expressed in percent),
6. SINad, representing the signal to noise ratio of the applied AF signal, expressed in
dB.
Note: Any AF test will need the audio option to be installed on your Willtek 4400.
Example
:MEAS:ARR:AFAN:ALL 2
:FETCh:AFAN:ALL?
In this example, the six most important AF measurements are performed twice in a
sequence. The measurement result string in this example is:
"3.2,2.7,0.1,1000.0,1.1,53.5,
2.7,1.7,0.08,1000.0,0.9,55.2".
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