28 Agilent N5181A/82A MXG Signal Generators SCPI Command Reference
Basic Function Commands
Digital Modulation Subsystem—N5182A ([:SOURce])
:DM:IQADjustment:EXTernal:QOFFset
Supported E4438C
[:SOURce]:DM:IQADjustment:EXTernal:QOFFset <value>
[:SOURce]:DM:IQADjustment:EXTernal:QOFFset?
This command sets the offset voltage for a signal applied to the 600 ohm Q input connector.
The variable <value> is expressed in units of volts (mV–V).
*RST +0.00000000E+000
Range −100 mV to 100 mV
Key Entry External Input Q Offset
Remarks This command is effective only if the state of the I/Q adjustment function is set to
ON. Refer to “:DM:IQADjustment[:STATe]” on page 30.
:DM:IQADjustment:EXTernal:QSKew
Supported N5182A
[:SOURce]:DM:IQADjustment:EXTernal:QSKew <value>
[:SOURce]:DM:IQADjustment:EXTernal:QSKew?
CAUTION This Q phase angle adjustment is uncalibrated.
This command adjusts the phase angle (quadrature skew) between the I and Q vectors by increasing
or decreasing the Q phase angle. This command adjusts the signals externally input to the signal
generator’s front panel Q input connector. For more information on this connector, refer to the User’s
Guide.
The <value> variable is expressed in degrees with a minimum resolution of 0.1.
If the signal generator is operating at frequencies greater than 3.3 GHz, quadrature skew settings
greater than ±5 degrees will not be within specifications.
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.
This command is effective only if the state of the I/Q adjustment function is set to ON. Refer to
“:DM:IQADjustment[:STATe]” on page 30.
Example
:DM:IQAD:EXT:QSK 4.5
The preceding example increases the phase angle by 4.5 degrees.
*RST +0.00000000E+000
Range −200 to +200
Key Entry Quadrature Angle Adjustment
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