Chapter 11, Problem 2STP

To determine

To choose: The correct option.

Answer to Problem 2STP

Option (C) is correct.

Explanation of Solution

Introduction:

A function of one or more than one variable that conveys data of physical phenomenon. It also known as an observable change in quality.

Digital signals are electrical signals where there are only two possible values, OFF and ON. This is similar to a light switch where the light can be OFF or ON but it cannot be half OFF or half-ON.

A digital signal can be used to modulate the amplitude or frequency of the carrier wave.

So, the correct option is (C).

Option A is incorrect because it does not have OFF and ON values.

Option B is incorrect because it does not have OFF and ON values.

Option D is incorrect because it does not have OFF and ON values.

Conclusion:

Hence, Digital signals have OFF and ON values. The correct option is C.