2-8
IM 703155-01E
IQ Gain Ratio «For procedures, see section 5.4»
For each output terminal set (OUT), you can set the amplitude difference X of the output
waveforms as a percentage of the amplitude of Q. Amplitude X is set in the opposite
direction to the amplitude of the I and Q waveforms. As I is increased Q decreases and
vice versa. You can use this to simulate the amplitude error of a vector modulator/
demodulator. You can change the IQ gain ratio even while the waveform is being output.
Amplitude of I
Amplitude of Q
= (1+
X
100
)
Q
I
–
+
+
–
X
X
Quadrature Offset «For procedures, see section 5.4»
For each output terminal set (OUT), you can set the angles of the I and Q axes of the
output waveform.
You can use this to simulate the phase error of a vector modulator/demodulator. You
can change the quadrature offset even while the waveform is being output.
Q
I
+
+
Voltage Offset (DC Voltage) «For procedures, see section 5.4»
For each output terminal set (OUT), you can set an offset voltage to the voltage level of I
and Q. There are two types of offsets available: common-mode offset and differential
offset. You can change the voltage offset even while the waveform is being output.
• Common-mode offset
The specified offset voltage is added to the I, I
_
, Q, and Q
_
waveforms.
Common offset voltage
0 V
0 V
I or Q
I or Q
2.4 Generation/Output Conditions
