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.
|
GUI Location |
I/Q In > I Offset |
|
SCPI Command |
[:SOURce]:IQIN<channel>:IQADjustment:EXTernal:IOFFset <voltage> [:SOURce]:IQIN<channel>:IQADjustment:EXTernal:IOFFset? |
|
SCPI Example |
IQIN:IQAD:EXT:IOFF 1 mV IQIN:IQAD:EXT:IOFF? |
|
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 |
| Backwards Compatibility SCPI |
N51xxB: [:SOURce]:DM:IQADjustment:EXTernal:COFFset |
| Backwards Compatibility Notes |
For N51xxB: Alias [:SOURce]:DM:IQADjustment:EXTernal:COFFset to [:SOURce]:IQIN1:IQADjustment:EXTernal:IOFFset; [:SOURce]:IQIN1:IQADjustment:EXTernal:QOFFset |
|
Initial S/W Revision |
A.01.00 |
| Modified at S/W Revision |
A.20.00 - Added BWC command for N51xxB |
Specifies a DC offset in volts for a signal applied to the external Q+/- input ports.
This option 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, this voltage (0.025 volts) is added to the signal applied to the external Q+ input port while this voltage (0.025 volts) is subtracted from the signal applied to the external Q- input port.
|
GUI Location |
I/Q In > Q Offset |
|
SCPI Command |
[:SOURce]:IQIN<channel>:IQADjustment:EXTernal:QOFFset <voltage> [:SOURce]:IQIN<channel>:IQADjustment:EXTernal:QOFFset? |
|
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 |
| Backwards Compatibility Notes |
For N51xxB: When [:SOURce]:DM:IQADjustment:EXTernal:COFFset is set, the same value is set to Q Offset. |
|
Initial S/W Revision |
A.01.00 |
Remote Command Only
Provided to allow programmatic compatibility with other Keysight Technologies signal generators. Command is accepted but does nothing.
| SCPI Command |
[:SOURce]:DM:IQADjustment:EXTernal:CMRange COARse|FINE [:SOURce]:DM:IQADjustment:EXTernal:CMRange? |
| SCPI Example |
:DM:IQAD:EXT:CMR COAR :DM:IQAD:EXT:CMR? |
| Notes |
Value is COARse and unchangeable, attempting to change value raises error -224, "Illegal parameter value;FINE is not supported on this platform." |
| Preset | COARse |
| Range | Coarse|Fine |
| State Saved | Yes |
| Initial S/W Revision | A.20.00 |
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.
|
GUI Location |
I/Q In > Quadrature Angle |
|
SCPI Command |
[:SOURce]:IQIN<channel>:IQADjustment:EXTernal:QSKew <degrees> [:SOURce]:IQIN<channel>:IQADjustment:EXTernal:QSKew? |
|
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 |
|
Resolution |
0.01 |
|
Initial S/W Revision |
A.01.00 |