Automation System
One of the following is not considered a method of input control in a CAD system.

None of these
Plotter
Joystick
Programmable function box
Touch terminal

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Automation System
What is proportional control?

It has a discrete output for each error value
The gain is independent of offset error.
All of these
None of these
The controller output varies continuously over a range

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Automation System
D/A (digital to analog) conversion:

has to be sampled at 1/2 the highest input frequency
must be fed through a filter to reproduce the original signal accurately
None of these
results in a binary code as the final output
both (b) and (c)

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