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CHAPTER 1
GENERAL DESCRIPTION AND OPERATION OF THE
580 ANALOG/HYBRID COMPUTING SYSTEM
1.1
GENERAL DESCRIPTION
The EAI 580 Analog/Hybrid Computing System (Figure 1.1) is composed of solid
state computing components.
The 580 (categorized as a desk-top computer) is
compact in size and operates with stability and precision in a normal office
or classroom environment as well as a computer laboratory.
Each component
has input and output terminations on the computer pre-patch panel for inter-
connection by bottle plugs and patch cords.
The pre-patch panel is arranged
in a series of 8 similar patching fields (Figure 1.2), with each field separated
horizontally by either a control or trunk trays.
The modular design tends to
eliminate patching clutter caused by long across-the-panel patching.
The main control panel is located to the lower left of the analog patch panel
(Figure 1.3).
This area contains a majority of the operating controls.
The analog readout panel, located to the far left of the analog patch panel,
contains the overload indicators, DVM readout (an expansion) and a multi-
range voltmeter.
The Auxiliary Control Panel, immediately to the left of the analog patch panel,
includes 10 handset potentiometers, and override controls for both the compar-
ators and the function relays.
The area below the analog patch panel contains two manual diode function
generator (MDFG) drawers.
The lower drawer contains the set-up amplifier and
controls, and up to four, 10-segment MDFGs.
The upper drawer is used to house
additional segments as required.
The logic package, located at the upper left of the analog patch panel, con-
tains the logic patch panel and various indicators and controls for the logic
components.
1 • .2
OPERATING CONS IDERATIONS
1.2.1
General
The 580 is completely tested and calibrated at the time of manufacture and is
shipped with all components in place.
After performing the installation check-
out procedure outlined in the 580 Maintenance Manual, the computer is ready for
operation.
It should be noted that the low voltage levels used in the 580 eliminate any
shock hazard when patching with the pre-patch panel in the computer.
Current-
limiting circuits protect the reference supplies from damage when they are in-
1-1
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