LO1

Question 1

What is amplitude?

Answer 1

The maximum distance reached by a wave perpendicular to the direction of propagation.(meters)

Question 2

What are 4 types of pulse modulation?

Answer 2

Amplitude, width, position & density.

Question 3

What is SNR?

Answer 3

A measurement of the background noise in comparison to the working signal of the system.

Question 4

What is diffraction?

Answer 4

The bending of waves around an obstacle.

Question 5

What is refraction?

Answer 5

The bending of of a wave due to the change in velocity of the wavelength when passing through a medium.

Question 6

What is phase coding?

Answer 6

When a long pulse is divided into a series of shorter sub pulses.

Question 7

What are the 4 types of pulse modulation?

Answer 7

-Pulse Amplitude Modulation (PAM).
-Pulse Width Modulation (PWM).
-Pulse Position Modulation (PPM).
-Pulse Density Modulation (PDM).

Question 8

What are the different types of frequency phases?

Answer 8

-AM
-FM
-PM
-Pulse Amp
-Pulse Density
-Pulse width

Question 9

What is multiplexing?

Answer 9

-A structure consisting of three axis; code, frequency and time.

-A way of sending multiple signals or streams of information over a communications link at the same time in the form of a single, complex signal.

Question 10

What are radiation patterns?

Answer 10

A graph showing the actual intensity/strength of a propagated radio wave at a fixed distance.