Square waves can be generated by rapidly switching (pulsing) an electrical or optical power source-a technique called ____.
A) block keying
B) shift keying
C) on-off keying
D) polar keying

Question

Square waves can be generated by rapidly switching (pulsing) an electrical or optical power source-a technique called ____.
A) ​block keying
B) ​shift keying
C) ​on-off keying
D) ​polar keying

Quizplus · Accepted Answer

The technique described in the question is also known as on-off modulation or keying. Block keying is not a commonly used term in this context. Shift keying and polar keying refer to different modulation techniques that are not specific to generating square waves.

Square Waves Can Be Generated by Rapidly Switching (Pulsing) an Electrical