Keysight CXG, EXG, and MXG X-Series Signal Generators Service Guide 57
Instrument Information and Calibration Data
Option Licenses
Option Licenses
Option licenses are stored in two different locations in the instrument, the A5
CPU assembly and the A3 RF assembly. However, the instrument will only use
those that are in the A5 CPU assembly. The licenses in the A3 RF assembly are
for backup purposes only. When an instrument is shipped from the factory a
backup copy of all licenses is saved in the A3 RF assembly backup memory
location.
Whenever an option license is added to an instrument it will only be saved in
the A5 CPU assembly. The licenses should then be backed up for it to be saved
in the A3 RF backup memory location.
Restore Licenses
If the A5 CPU assembly is replaced the licenses that are backed up on the A3
RF assembly will need to be restored to the A5 CPU assembly so that the
proper functionality is restored to the instrument.
When an A5 CPU assembly is replaced the following error messages will be
displayed until the licenses are restored:
617 Configuration Error: The instrument has no frequency range option
installed. Use the service procedure to recover instrument licenses from the
backup.
617 Configuration Error: The backup memory contains license keys for
serial number <serial number>. Use the service procedure to overwrite the
backup memory.
The following procedure will restore the instrument licenses from the backup
location on the A3 RF assembly to the A5 CPU memory:
1. Turn the instrument off by using the front panel power button.
2. Once the instrument has turned off press and hold the front panel Preset
key.
3. While holding the Preset key, press and release the power button to turn
the instrument back on.
4. Continue to hold the Preset key for 10 seconds after pressing the power
button, then release it.
5. After approximately 30 seconds the boot Service Menu will appear, as
shown in Figure 3-1.
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