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What type of beams are used for the tactical control panel?

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What type of beams are used for the tactical control panel?

(a) Matrix array of infrared beams

(b) Light beams

(c) Lasers

(d) Microwave beams

This question was addressed to me in an interview for job.

Origin of the question is Control and Data Entry in division Displays and Man-Machine Interaction of Avionics

1 Answer

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Best answer
The correct option is (a) Matrix array of infrared beams

The explanation is: A typical tactical control panel uses a matrix of infrared beams across the surface of the display containing various functional keys. Touching a specific function key on the display surface interrupts the x and y infrared beams which intersect over the displayed key function and hence signal the operation of that particular key function.

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