60 Keysight CXG, EXG, and MXG X-Series Signal Generators Service Guide
Instrument Information and Calibration Data
Option Licenses
10.The instrument will copy the licenses from the A5 CPU memory to the
backup location on the new A3 RF assembly and load the instrument
firmware.
11.If the error listed above is seen at this point cycle the instrument power
once more and it should then be gone.