User`s guide

Agilent N5161A/62A/81A/82A/83A MXG Signal Generators User’s Guide 99

Optimizing Performance

Using I/Q Mod Skew Cal

The I/Q mod skew calibration initiates the external calibration of the I/Q timing skew for the I/Q

modulator (RF output path). This feature will improve out- of- channel image rejection.

This calibration requires the RF output of the instrument to be connected to the RF input of a

spectrum analyzer.

NOTE This calibration needs to be run only once for any set of hardware.

For instruments that shipped with firmware release A.01.60 or newer, this calibration does

not need to be run unless hardware inside of the instrument is repaired or replaced.

For instruments that shipped prior to the release of A.01.60 firmware, option "R2C: Core FW

enhancements, A.01.60" or newer must be purchased to allow the full Int Channel Correction

functionality, which corrects the internal baseband generator RF and baseband magnitude

and phase across the 100MHz baseband bandwidth for all RF frequencies.

For instruments that shipped prior to firmware release A.01.60 that have had option "R2C:

Core FW enhancements, A.01.60" or newer installed, the Int Channel Correction feature will

achieve its full correction only after this calibration has been run once.