deck_3580620

Question 1

complete this sentence… radio stations broadcast signals at a…

Answer 1

particular frequency

Question 2

what type of signal is used to reduce interference?

Answer 2

digital signal

Question 3

what is a benefit of digital audio broadcasting?

Answer 3

a greater choice of radio stations

Question 4

what is a disadvantage to digital audio broadcasting?

Answer 4

the audio quality is not good

Question 5

what does DAB eliminate?

Answer 5

interference between other radio stations

Question 6

complete this sentence… radio waves are reflected by the…

Answer 6

ionosphere

Question 7

what does continued reflection of radio waves by the ionosphere allow?

Answer 7

allows radio waves to be received by aerials not in line of sight

Question 8

complete this sentence… microwaves pass through…

Answer 8

the ionosphere, received by satellites, amplified and retransmitted back to earth

Question 9

fill in the gap… radio waves are… when they meet an obstruction

Answer 9

diffracted

Question 10

what is ghosting?

Answer 10

when the signal travels further and if the analogue produces a picture shifted to the right