Exam 3: Radio Frequency Fundamentals

When an RF signal moves from one medium to another of a different density the signal actually bends instead of traveling in a straight line.This is known as ____.

What is the term that describes the ratio of desired signal to undesired signal in the average power level of a transmission?

Which type of modulation changes the starting point of the cycle to represent a change from a 1 bit to a 0 bit and vice versa?

Whenever a wave moves to the maximum voltage,then down to the minimum voltage,and then returns back to the starting point,it has finished two cycles.

What units are used to measure RF power gain and loss on a relative scale?

List the four properties that are used to describe an electromagnetic wave.

Which is a method of measuring RF power that can be used as a comparison between two values and gives a better picture of the loss or gain?

What is amplitude modulation?

Which describes the natural loss of signal strength through space?

Power of an electromagnetic signal such as one used in WLANs is measured by which unit?

Which binary modulation technique is similar to frequency modulation?

Which of the following are characteristics of electromagnetic waves (Choose all that apply.)

List three of the five behaviors that an electromagnetic wave may take as it propagates.

Which of the following are used to describe the behaviors of waves as they propagate? (Choose all that apply.)

What is the difference between an analog and digital signal? Provide an example of each signal type.

Which is caused by small objects or rough surfaces as an RF signal travels through the air?

How is RF power measured using a relative scale?

The ASK 1 bit has a carrier signal (positive voltage)while a 0 bit has no signal (zero voltage).

Which value can be measured by the circuitry on a wireless NIC to determine if it is clear to send its transmission?

There are several advantages of digital modulation over analog modulation.What are they?