How modulation index varies when given some values to it?
The modulation index or modulation depth is often denoted in percentage called as Percentage of Modulation. We will get the percentage of modulation, just by multiplying the modulation index value with 100.
For a perfect modulation, the value of modulation index should be 1, which implies the percentage of modulation should be 100%.
For instance, if this value is less than 1, i.e., the modulation index is 0.5, then the modulated output would have peak changes after some gaps. It is called as Under-modulation. Such a wave is called as an under-modulated wave.
If the value of the modulation index is greater than 1, i.e., 1.5 or so, then the wave will be an over-modulated wave. The output experiences a phase reversal.
How to Calculate Modulation Index?
Modulation Index calculator uses Modulation Index = Amplitude of Modulating Signal/Amplitude of Carrier Signal to calculate the Modulation Index, Modulation Index or modulation depth of a modulation scheme describes by how much the modulated variable of the carrier signal varies around its unmodulated level. It is defined differently in each modulation scheme. Modulation Index is denoted by μ symbol.
How to calculate Modulation Index using this online calculator? To use this online calculator for Modulation Index, enter Amplitude of Modulating Signal (A_{m}) & Amplitude of Carrier Signal (A_{c}) and hit the calculate button. Here is how the Modulation Index calculation can be explained with given input values -> 0.36 = 6.12/17.