A(n) _________ generates a waveform by converting direct-current energy to an alternating current.
A. amplifier
B. synthesizer
C. oscillator
D. feedback loop
Question 2
Which of the following is used primarily for two-way voice communication rather than entertainment?
A. Wideband FM
B. Guard bands
C. Narrowband FM (NBFM) systems
D. Specialized mobile radios (SMRs)