Ch 2 RF Characteristics and Behaviors

Question 1

Are electromagnetic waves comprised of an electric field and a magnetic field.

Answer 1

RF waves

Question 2

Is the distance between two instances of the same point in the waveform.

Answer 2

The wavelength of RF waves

Question 3

Is related to the frequency and the speed of the wave.

Answer 3

The wavelength

Question 4

So when you know the frequency, you can determine the wavelength

Answer 4

The speed of a wave is constant (the speed of light)

Question 5

The frequency is the rate at which the wave cycles per second and is measured in

Answer 5

Hertz

Question 6

is the strength or power of the wave.

Answer 6

The amplitude of the wave

Question 7

Amplitude is used in 802.11 networks as

Answer 7

Amplitude Shift Keying (ASK) modulation

Question 8

Is a comparison between two waves that are either in phase with each other or some degree out of phase.

Answer 8

The Phase

Question 9

phase is used in 802.11 networks as

Answer 9

Phase Shift Keying (PSK) modulation.

Question 10

occurs when an RF wave encounters a large reflective object in relation to the wavelength.

Answer 10

Reflection

Question 11

occurs when an RF wave encounters small reflective objects in relation to the wavelength.

Answer 11

Scattering

Question 12

occurs as an RF wave front spreads while moving through space.

Answer 12

Free Space Path Loss (FSPL)

Question 13

of gain doubles the usable distance of an RF signal and every blank db of loss halves the usable distance of an RF signal.

Answer 13

6 dB and -6dB

Question 14

Is a measurement of the return loss in an RF system.

Answer 14

Voltage Standing Wave Radio (VSWR)

Question 15

occurs when RF signals travel multiple paths to the receiver and arrive at slightly different times.

Answer 15

Multipath