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In the last this part of this the tutorial lesson, you will use the PWM modulator of the previous part to feed a binary input signal to the transmission line circuit of the first part. place and connect all the parts as shown in the figure below:
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== Using Complex Input Waveforms ==
So far you have mostly used SPICE's standard voltage sources with a few waveforms like constant, sinusoidal and pulse. In the last part of this tutorial lesson, you will use [[RF.Spice]]'s "Nonlinear Controlled Source" to synthesize more complex waveforms. For example, your input signal to the PWM modulator in the previous part was a periodic sinusoid. In this part, you will use a time-limited sinusoid with a finite duration of 8ns. You can make this waveform by multiplying the original sinusoid by a one-shot pulse of the same duration. The latter can be defined as a pulse waveform with an extremely large period:
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[[File:MixTUT6 29.png|thumb|750px|Transmitting the binary output of a PWM modulator through a long transmission line segment.]]
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[[File:MixTUT6 30.png|thumb|750px|The binary output of a PWM modulator.]]
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