Types of FM The FM systems are basically classified into following two types : Narrow band FM Wide band FM / Broadband FM Narrow Band FM A narrow band FM is the FM wave with a small bandwidth . The modulation index mf of narrow band FM is small as compared to one radian . Hence, the spectrum of narrow band FM consists of the carrier and upper sideband and a lower sideband . For small values of mf , the values of the j coefficients are as under : J0(mf) = 1, J1(mf) = mf/2 Jn(mf) = 0 for n > 1 Hence, … Continue reading Explain the Difference between Narrow band FM and Wide band FM