Which of the following devices is associated with the reception of radio signals?
A. Transmitting antenna
B. Demodulator
C. Oscillator
D. Microphone
The Correct Answer is C. Oscillator.
Transmitting antenna transmits, while a microphone enhances sound. A demodulator is used to separate information that was modulated onto the carrier, while a local oscillator receives radio signals.
The local oscillator is the heart of the receiver. It is the most critical circuit in the entire receiver because any drift or instability in the local oscillator will translate into drift and instability in the received signal.