(a)[2]
Describe the meaning of frequency modulation.
(b(i))[1]
The sinusoidal carrier wave has a frequency of $750\,\text{kHz}$ and an amplitude of $5.0\,\text{V}$. It is frequency modulated by a sinusoidal signal with frequency $7.5\,\text{kHz}$ and amplitude $1.5\,\text{V}$. The frequency deviation of the carrier wave is $20\,\text{kHz V}^{-1}$. Determine the amplitude of the frequency-modulated carrier wave.
(b(ii))[1]
Determine the lowest frequency of the frequency-modulated carrier wave.
(b(iii))[1]
Determine the highest frequency of the frequency-modulated carrier wave.
(b(iv))[1]
Determine how many times per second the frequency rises from its minimum value to its maximum value and then returns to the minimum value.