This topic describes the parameters of the I/Q In block.
For instruments with Option EXT, the following settings allow you to adjust the External I/Q inputs.
Specifies a DC offset in volts for a signal applied to the external I+/- input ports.
This is used to specify the total differential voltage applied to the external I input port. The Offset Voltage offsets the signal applied to the external I input port by the value of this voltage. This is accomplished by adding half of the Offset Voltage to the signal applied to the external I+ input port and subtracting half of the Offset Voltage from the signal applied to the external I- input port. For example, if the desired I Offset Voltage is 0.05 volts, then 0.025 volts is added to the signal applied to the external I+ input port and 0.025 volts is subtracted from the signal applied to the external I- input port.
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GUI Location |
I/Q In > I Offset |
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SCPI Command |
[:SOURce]:IQIN<channel>:IQADjustment:EXTernal:IOFFset <voltage> [:SOURce]:IQIN<channel>:IQADjustment:EXTernal:IOFFset? |
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SCPI Example |
IQIN:IQAD:EXT:IOFF 1 mV IQIN:IQAD:EXT:IOFF? |
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Notes |
For instruments without Option EXT, the offset is 0 and not changeable, sending the SCPI command does not generate an error. |
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Preset |
0 |
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State Saved |
Yes |
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Min |
-50 mV |
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Max |
50 mV |
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Resolution |
0.001 mV |
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Initial S/W Revision |
A.01.00 |
Specifies a DC offset in volts for a signal applied to the external Q+/- input ports.
This is used to specify the total differential voltage applied to the external Q input port. The Offset Voltage offsets the signal applied to the external Q input ports by the value of this voltage. This is accomplished by adding half of the Offset Voltage to the signal applied to the external Q+ input port and subtracting half of the Offset Voltage from the signal applied to the external Q- input port. For example, if the desired Q Offset Voltage is 0.05 volts, then 0.025 volts is added to the signal applied to the external Q+ input port and 0.025 volts is subtracted from the signal applied to the external Q- input port.
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GUI Location |
I/Q In > Q Offset |
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SCPI Command |
[:SOURce]:IQIN<channel>:IQADjustment:EXTernal:QOFFset <voltage> [:SOURce]:IQIN<channel>:IQADjustment:EXTernal:QOFFset? |
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SCPI Example |
IQIN:IQAD:EXT:QOFF 1 mV IQIN:IQAD:EXT:QOFF? |
|
Notes |
For instruments without Option EXT, the offset is 0 and not changeable, sending the SCPI command does not generate an error. |
|
Preset |
0 |
|
State Saved |
Yes |
|
Min |
-50 mV |
|
Max |
50 mV |
|
Resolution |
0.001 mV |
|
Initial S/W Revision |
A.01.00 |
Adjusts the phase angle (quadrature skew) between the I and Q vectors by increasing or decreasing the Q phase angle.
Positive skew increases the angle from 90 degrees while negative skew decreases the angle from 90 degrees. When the quadrature skew is zero, the phase angle between the I and Q vectors is 90 degrees.
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GUI Location |
I/Q In > Quadrature Angle |
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SCPI Command |
[:SOURce]:IQIN<channel>:IQADjustment:EXTernal:QSKew <degrees> [:SOURce]:IQIN<channel>:IQADjustment:EXTernal:QSKew? |
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SCPI Example |
IQIN:IQAD:EXT:QSK 0.5 IQIN:IQAD:EXT:QSK? |
|
Notes |
For instruments without Option EXT, the skew is 0 and not changeable, sending the SCPI command does not generate an error. |
|
Preset |
0 |
|
State Saved |
Yes |
|
Min |
-10 |
|
Max |
10 |
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Resolution |
0.01 |
|
Initial S/W Revision |
A.01.00 |