What is the modulation index of an FM signal having a carrier swing of 75 kHz?

What is the modulation index of an FM signal having a carrier swing of 75 kHz when the modulating signal has frequency of 3 kHz? Solution: 20.

What is percentage modulation index of FM?

Explanation: Percentage modulation in Frequency Modulation is the ratio of actual frequency deviation in the FM wave to the maximum allowable frequency deviation.

What is the modulation index of AM FM PM?

The modulation index equation is as follows. The modulation index should be a number between 0 and 1. When m is greater than 1, severe distortion results into the modulated waveform. This condition results when Vm is greater than Vc and it is also known as over modulation.

How is carrier swing calculated?

f = fc + Df Sin2pfa t. Total variation from lowest to the heights is called carrier swing. The carrier signal, modulating signal and modulated signal are shown in the below fig.

What is the percentage of modulation if the modulating signal is of 7.5 V and carrier is of 9V?

83.33. 9
What is the percentage of modulation if the modulating signal is of 7.5V and carrier is of 9V? Explanation: modulation index m = Vm⁄Vc = 7.5⁄9* 100 = 83.33. 9.

What is the modulation index for the FM to behave as a narrowband?

12. What is the modulation index for the FM to behave as a narrowband? Explanation: When the modulation index is around 0.25 the modulation produces only single pairs of significant sidebands like that of AM. This occupies comparatively less spectrum space.

How do you calculate modulation frequency?

The frequency modulation is known as a constant bandwidth system and an example of this system is given below.

1. Δf = 75 KHz fm = 500 Hz BWFM = 2 [75 + (500/1000)] KHz = 151.0 KHz.
2. Δf = 75 KHz fm = 5000 Hz BWFM = 2 [75 + (5000/1000)] KHz = 160.0 KHz.
3. Δf = 75 KHz fm = 10000 Hz BWFM = 2 [75 + (10000/1000)] KHz = 170.0 KHz.

What is maximum modulation index?

A modulation index of 1 is the maximum level of modulation that can normally be applied and occurs when the envelope increases by a factor of 1, i.e. twice the steady state value, and falls to zero.