Modulation

Question 1

Modulations

Answer 1

It is the process of varying amplitude or frequency where a high frequency wave known as the carrier wave is transmitted

Question 2

Advantage of A.m

Answer 2

1-A.m transmission wavebands are broadcast over a very large distances so that one transmitter can serve a large area
2-It is simpler and cheaper

Question 3

Advantage of F.m

Answer 3

On very high frequencies the bandwidth of f.m for broadcast is about 15 Khz which offers high quality for music

Question 4

Disadvantage of A.m

Answer 4

Bandwidth of a.m broadcast is about 4.5 kHz , which is adequate for speech but not for music

Question 5

Disadvantage of F.m

Answer 5

Because f.m can be transmitted over small small local areas, many transmitter are needed to broadcast over a large area

Question 6

Summary of adv and disc

Answer 6

F.m transmission are more expensive than a.m
The area covered is smaller than am
This difference of coverage is an advantage where local radio is concerned but a disadvantage for national radio
Bandwidth of f.m is greater and suffers less noise