R&S AFQ100A Operating Manual page 171

R&S AFQ100A
I / Q Offset
Enable Bias
Bias
1401.3084.32
Sets a DC component (balanced or unbalanced).
Value range: -10 mV ...+10 mV.
Balanced Output:
Sets an offset between the inverting and the non-inverting output.
The set value is set half in the positive and half in the negative
direction:
A positive offset is set with half of the value in positive direction at the
non-inverting outputs, in negative direction at the inverting outputs,
respectively.
For example, if a 10.0 mV offset value is set for the I signal
component, the output signal at I will have a 5.0 mV offset and the
output signal at I BAR will have a - 5.0 mV offset.
1.5 V
Offset (positive)
0 V
A negative offset is set with half of the value in negative direction at
the non-inverting outputs, in positive direction at the inverting outputs,
respectively.
1.5 V
Offset (negative)
0 V
Unbalanced Output:
Sets a DC component in the I/Q path in Volts.
Remote-control commands :
SOUR:OUTP:ANAL:BAL:OFFS:I 0.001
SOUR:OUTP:ANAL:BAL:OFFS:Q 0.002
SOUR:OUTP:ANAL:UNB:OFFS:I 0.01
SOUR:OUTP:ANAL:UNB:OFFS:Q 0.01
(Type balanced only)
Switches On or Off the bias amplifier.
Remote-control commands:
SOUR:OUTP:ANAL:BAL:BIAS:STAT ON
(Type balanced only)
Sets the bias. A DC voltage is superimposed upon the symmetric I and
Q signal.
Value range: -2.5 V ... 2.5 V.
Remote-control commands:
SOUR:OUTP:ANAL:BAL:BIAS 0.5
4.60
Output Block
I OUT
I OUT BAR
I OUT BAR
I OUT
E-3