Automation System
Robots consist of three basic components; power supply, control (memory) console, and:

microcomputer
None of these
coaxial cable
mechanical unit (arm)
software

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Automation System
Digital signals:

have a frequency measured in units of hertz
can have three possible levels
None of these
have a sinusoidal shape.
are assigned values of 1 or 0 depending on the voltage level

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