Impairments Block - R&S AFQ100A Operating Manual

R&S AFQ100A

Impairments Block

This subsystem contains the commands for the digital I/Q impairments. Gain and offset cannot be set
independently.
Command
[SOURce:]IMPairment:GAIN:I
[SOURce:]IMPairment:GAIN:Q
[SOURce:]IMPairment:OFFSet:I
[SOURce:]IMPairment:OFFSet:Q:
[SOURce:]IMPairment:PHASe
[SOURce:]IMPairment:STATe
[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
*RST value
0
[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
*RST value
0
[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
*RST value
0
1401.3084.32
Parameters
-2dB ... 0 dB
-2dB ... 0 dB
-0.1 FS ...+0.1 FS, (digital)
-0.1 FS ...+0.1 FS, (digital)
-10 ...+10 deg
ON | OFF
'sets the gain to -1.99 dB.
Resolution Options
0.01 dB
'sets the gain to -1.99 dB.
Resolution Options
0.01 dB
'sets a negative DC offset to 10% FS.
Resolution Options
0.1% FS
AFQ Commands - Signal Generation
6.46
Default Remark
unit
dB
dB
%
%
deg
-
SCPI
Device-specific
SCPI
Device-specific
SCPI
Device-specific
E-3