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194 Agilent N5161A/62A/81A/82A/83A MXG Signal Generators User’s Guide
Basic Digital Operation (Option 651/652/654) Preliminary
I/Q Calibration Preliminary
The I/Q adjustment, I/Q Delay, is not for adding impairments; its function is to compensate for any
latency between the EVENT output signals (marker signals) and the RF output.
I/Q Calibration
Use the I/Q calibration for I and Q signal corrections. What aspects of the I and Q signal is corrected
depends on whether the signal is internally or externally generated.
When you perform an I/Q calibration, that calibration data takes precedence over the
factory–supplied calibration data. The calibration routines improves performance that may degrade
over time or due to temperature changes.
Table 8-2 I/Q Adjustments Uses
I/Q Adjustment Effect Impairment
Offset Carrier feedthrough dc offset
Quadrature Angle
EVM error phase skew
I/Q Images I/Q path delay
I/Q Skew EVM error
high sample rate phase
skew or I/Q path delay
I/Q Gain Balance I/Q amplitude difference I/Q gain ratio
Correction Internal I and Q External I and Q
Offset XX
Gain Balance X--
Quadrature Error XX