(a)[2]
Distinguish an analogue signal from a digital signal.
(b(i))[1]
An analogue-to-digital converter (ADC) changes whole decimal numbers from $0$ to $23$ into digital numbers. State the smallest number of bits in each digital number.
(b(ii))[1]
An analogue-to-digital converter (ADC) changes whole decimal numbers from $0$ to $23$ into digital numbers. State the digital number for decimal $13$.
(c)[3]
An analogue signal is digitised before transmission, then changed back into an analogue signal after reception. State and explain what happens to the reproduced signal when the number of bits in the analogue-to-digital converter (ADC) and the digital-to-analogue converter (DAC) is increased.