5-24 Service Guide E8361-90001
Theory of Operation PNA Series Microwave Network Analyzers
Digital Processing and Digital Control Group Operation E8361A
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 5-25.
The digital control functional group consists of two subgroups:
• Front Panel Subgroup
— A1 Keypad Assembly
— A2 Display Assembly
— A3 Front Panel Interface Board
— A14 system motherboard
• Data Acquisition and Processing Subgroup
— A6 SPAM Board (Digital Description)
— A15 CPU Board
— A40 Floppy Disk Drive
— A41 Hard Disk Drive
— USB Hub
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