R&S AFQ100A Operating Manual page 308

R&S AFQ100A
[SOURce:]IMPairment:OFFSet:Q
The command sets a DC offset in the Q 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 Q 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:Q -0.10FS
*RST value
0
[SOURce:]IMPairment:PHASe -20 ... +20 deg
The command sets an I/Q mismatch
The impaired signals I
+
I = I - q × Q
i
+
Q = q × Q
q
with
sin( )
q =
i
cos( )
q =
q
Example: IMP:PHAS -4.9DEG
*RST value
0
[SOURce:]IMPairment:STATe ON | OFF
The command activates (On) and deactivates (Off) impairments.
Example: IMP:STAT OFF
*RST value
OFF
1401.3084.32
'sets a negative DC offset to 10% FS.
Resolution Options
0.1% FS
from -20 deg to +20 deg, i.e. a deviation from 90 deg.
+ +
and Q are given by the phase missmatch
'sets the phase mismatch to -4.9 deg.
Resolution Options
0.1 deg
'deactivates impairment.
Resolution Options
-
AFQ Commands - Signal Generation
6.47
SCPI
Device-specific
and the proper ones I ,Q:
SCPI
Device-specific
SCPI
Device-specific
E-3