Overview
2.4.1 7200 ACU Hardware
The Model 7200 ACU is a technically advanced, specially designed, multitasking
embedded control computer that includes input and output circuitry sufficient for
interfacing with all other related tracking system components. The ACU hardware
is based upon the industrial Versa Module Europe (VME64 (VITA 1-1994)) bus
architecture, providing extreme versatility and reliability far above many other
hardware platforms. Several printed circuit cards and peripheral subassemblies,
described in subsequent sections, are integrated in a custom chassis to comprise
the ACU. The primary components of the 7200 ACU are:
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Front Panel Display Assembly
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Optical Encoder PCB (Optional)
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Single/Dual-Speed RDC PCB (Optional)
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Optical Encoder I/O PCB (Optional)
The 7200 ACU front panel is shown in Figure 2-2. The 7200 ACU functional block
diagram is shown in Figure 2-3. Figures 2-4 and 2-5 show the top and side view
of the ACU respectively. (Refer to the engineering drawings in Section 7.0)
Figure 2-2 7200 Antenna Control Unit Front Panel
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