Question

An FM transmitter without signal input is called:

• A. Modulation
• B. Frequency deviation
• C. Frequency modulation
• D. None of the above

Hint:

Frequency modulation involves changing the frequency of a carrier wave in response to an input signal, but without a signal, no modulation occurs.

Answer 1

The Correct Option is D

Step 1: Understanding FM transmitter operation. An FM transmitter without input is simply not transmitting a signal. The term "frequency modulation" refers to how the carrier frequency is varied according to the input signal.
Step 2: Conclusion. Thus, it is not correct to name the transmitter in this case as any of the listed options.