Frequency modulation is a type of modulation used in the transmission of information over a radio wave. It involves a change in the frequency of the carrier wave, which carries the information. In frequency modulation, the information signal is used to modulate the frequency of the carrier wave. The resulting waveform has a variable frequency that is directly proportional to the amplitude of the modulating signal.

Fixed Frequency in Frequency Modulation:

In frequency modulation, the carrier wave has a fixed frequency. It is not changed during the modulation process. The frequency of the carrier wave is determined by the transmitter and is usually in the range of several megahertz to several gigahertz. The fixed frequency of the carrier wave ensures that the receiver can easily tune in to the signal and extract the modulating signal.

Advantages of Fixed Frequency in Frequency Modulation:

1. Easy Tuning: The fixed frequency of the carrier wave makes it easy for the receiver to tune in to the signal.

2. High Quality: Since the carrier wave has a fixed frequency, the modulating signal can be transmitted with high quality.

3. Low Interference: The fixed frequency of the carrier wave ensures that there is low interference from other radio signals.

Conclusion:

In conclusion, frequency modulation involves a change in the frequency of the carrier wave, which carries the information. However, the carrier wave has a fixed frequency in frequency modulation. The fixed frequency of the carrier wave ensures that the receiver can easily tune in to the signal and extract the modulating signal.