N5161A/62A/81A/82A/83A MXG Signal Generators User's Guide

Basic Digital Operation (Option 651/652/654)I/Q CalibrationI/Q CalibrationUse the I/Q calibration for I and Q signal corrections. What aspects of the I and Q signal is correcteddepends on whether the signal is internally or externally generated.Correction Internal I and Q External I and QOffset X XGain Balance X --Quadrature Error X XWhen you perform an I/Q calibration, that calibration data takes precedence over thefactory–supplied calibration data. The calibration routines improve performance that may degradeover time or due to temperature changes. An I/Q calibration should be run when the ambienttemperature has varied by at least ±5 degrees Celsius from the ambient temperature at which theprevious calibration was run.CAUTIONFor firmware revisions ≥A.01.50, the behavior for the I/Q calibration is:• The user I/Q calibration is persistent (i.e. Pressing instrument preset or cyclingpower does not remove the user I/Q calibration from memory).• If the start and stop frequencies are set to the same value, then the calibration willbe performed exactly at that frequency and the data will be persisted in thebounding calibration array elements.For firmware revisions ≤A.01.50:• The user I/Q calibration is not persistent (i.e. Pressing instrument preset or cyclingpower removes the user I/Q calibration from memory).• If the start and stop frequencies are set to the same value, the calibration isperformed at the bounding calibration array elements and persisted in the boundingcalibration array elements.Agilent N5161A/62A/81A/82A/83A MXG Signal Generators User’s Guide 203