5-26 Keysight N5221A/22A Service Guide
Theory of Operation
Digital Processing and Digital Control Group Operation
5-
Digital Processing and Digital Control Group Operation
The digital processor and control group provides digital control for the entire
analyzer. It provides:
— front panel operation,
— output to the display,
— math processing functions, and
— communications between the analyzer and an external controller or
peripherals.
A block diagram of the digital control functional group is shown in Figure 5-8
on page 5-27.
The digital control functional group consists of two subgroups:
— Front Panel Subgroup
— A1 Front Panel Display Board
— A2 USB Board
— A3 Display Assembly
— Keypad Assembly
— A14 system motherboard
— Data Acquisition and Processing Subgroup
— A12 SPAM Board (Digital Description)
— A17 CPU Board
— A51 Solid State Drive
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