P1f

Question	Answer
Name some uses of infrared signals in transmissions	Remote controls - tv, DVD WiFi - short distance links Computer - printer
What do thermal imaging cameras detect?	Infrared heat
Name the two types of signals	Analogue and digital
Advantages of digital signals	Multiplexing - one or more signals been carried down by an optic fibre. Easier to remove interference
Advantages of optic fibres	Can carry lots of information/signals & rapid & uses pulses of light to transmit data
Why is the digital switchover happening?	More channels can be received and there is less likely to be fuzzy or 'noisy' because digital signals don't suffer with interference as much

Resource summary

	Created by jimmy98 almost 11 years ago