R&S AFQ100A
AFQ Commands - Signal Generation
1401.3084.32 6.46
E-3
Impairments Block
This subsystem contains the commands for the digital I/Q impairments. Gain and offset cannot be set
independently.
Command Parameters
Default
unit
Remark
[SOURce:]IMPairment:GAIN:I
-2dB ... 0 dB
dB
[SOURce:]IMPairment:GAIN:Q
-2dB ... 0 dB
dB
[SOURce:]IMPairment:OFFSet:I
-0.1 FS ...+0.1 FS, (digital)
%
[SOURce:]IMPairment:OFFSet:Q:
-0.1 FS ...+0.1 FS, (digital)
%
[SOURce:]IMPairment:PHASe
-10 ...+10 deg
deg
[SOURce:]IMPairment:STATe
ON | OFF
-
[SOURce:]IMPairment:GAIN:I
-2 dB ... 0 dB
The command sets a gain in the I path from -2 dB to 0 dB.
Example:
IMP:GAIN:I -1.99
'sets the gain to -1.99 dB.
*RST value
Resolution
Options
SCPI
0
0.01 dB
Device-specific
[SOURce:]IMPairment:GAIN:Q
-2 dB ... 0 dB
The command sets a gain in the Q path from -2 dB to 0 dB.
Example:
IMP:GAIN:Q -1.99
'sets the gain to -1.99 dB.
*RST value
Resolution
Options
SCPI
0
0.01 dB
Device-specific
[SOURce:]IMPairment:OFFSet:I
The command sets a DC offset in the I path from -0.1 FS to +0.1 FS ( = [-10% ...+10%] of the digital
signal). The accessible data range depends on the settings of the
Gain
in the I path. After entering
the gain, the instrument calculates the accessible data range of the offset in order not to output an
amplitude exceeding 1.0 full scale.
Example:
IMP:OFFS:I -0.10FS
'sets a negative DC offset to 10% FS.
*RST value
Resolution
Options
SCPI
0
0.1% FS
Device-specific
