Automation System
Digital signals:

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

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Automation System
Ergonomics refers to:

the cost relationship of the workstation versus productivity
None of these
the technology involved in the workstation itself
the human aspect of the environment around the workstation as well as the workstation itself
the level of involvement the operator has with the workstation

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