LESSON EXERCISES
In each of the following exercises, select the ONE answer that BEST completes the statement or answers the
question. Indicate your solution by circling the letter opposite the correct answer in the subcourse booklet.
1.
The principal function performed by the modulator unit in a communication station is conversion of
a.
baseband signals to modulated signals.
b.
modulated signals to baseband signals.
c.
beacon signals to modulated data signals.
d.
modulated data signals to beacon signals.
2.
The purpose of using preemphasis and deemphasis networks in angle-modulated transmitters is to
a.
attenuate the high-frequency components.
b.
increase the power output of the transmitter.
c.
improve the baseband's signal-to-noise ratio.
d.
distribute the noise more uniformly throughout the audible frequency spectrum.
344 L3
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