</table>
You will use the basic voltage source V1 to generate a sinusoidal waveform. Then you will replace it with a '''Pulse Generator''', a '''Ramp Generator''' and a '''Triangular Wave Generator''', all of which can be accessed from '''Menu > Parts > Waveform Generator Blocks > Basic Waveforms'''. Define each source one by one according to the waveform tables below:
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The results are shown in the figures below for all the four different waveforms. Using the graph window's '''Delta Line Mode''', you can measure the period of the FM-modulated waveforms at different time instants. You will find that when the input signal is zero, the period is 100ns (corresponding to 10MHz). When the input signal reaches +1V or -1V, the modulated output frequency increases to 15MHz or decreases to 5MHz, respectively.
<table>