FM bandwidth= 2 x (Δf + fM) fM is the peak frequency of the modulated signal.
10
Do FM or AM signals have higher noise immunity?
FM.
5
What is the advantage of a small FM frequency deviation?
Less frequency deviation means more channels can fit into the same frequency spectrum.
20
Which transmission media has the highest bandwidth?
Optical fibres.
10
What is an analogue signal?
An analogue signal is a signal that has the same variation with time as the data does.
15
Which is a digital signal?
A digital signal is a signal which consists of a series of highs and lows with no intermediate values.
15
What is the function of an analogue to digital converter?
The analogue signal is sampled at a number of regular time intervals and then each is converted to a binary number.
15
What are some advantages of digital to analogue?
The signal is able to be regenerated so there is minimal noise. Extra data can be added so the signal can be checked for errors.
20
What are 2 ways to improve the reproduction of input signal
1. Increase the number of bits . number for each sampling so that the step height is reduced. 2. Increase sampling frequency so that the depth isis reduced.
