178 Keysight CXG, EXG, and MXG X-Series Signal Generators Service Guide
CPU and Disk Drives
CPU Assembly Overview
CPU Assembly Overview
The A5 CPU assembly contains an Intel Atom processor running a Win CE
operating system. It controls all activities in the signal generator and translates
information entered from the front panel keys as well as remote
communication, such as LAN, GPIB, USB, and communicates the necessary
instructions on the internal buses to the instrument hardware. It also monitors
critical circuits, such as unleveled and unlocked conditions, and reports these
problems to the user.
The CPU has non-volatile flash memory on it for the storage of the operating
system, instrument firmware, configuration information, and calibration files.
There is also storage available for user data files. The size of the overall
memory as well as how much is allocated for each of the types of usage
mentioned may vary depending on the vintage of the CPU assembly.
The part number and serial number of the A5 CPU assembly installed in an
instrument can be seen on the Utility, Instrument Info, Installed Board Info
screen, as shown in Figure 9-1.
Figure 9-1 Installed Board Info Screen
Basic information on the Host Processing Platform of the A5 CPU assembly
installed in an instrument, as well as the revision of the operating system, can
be seen on the Utility, Instrument Info, Diagnostic Info screen, as shown in
Figure 9-2.
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