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A carrierwave of frequency 1.5 MHz and amplitude 50 V is modulated by a sinusoidal wave of frequency 10 kHZ producing 50% modulation . Calculate the amplitude of AM wave and frequencies of the side bands produced . |
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Answer» SOLUTION :`f_c= 1.5 MHz` ` E=50V ` `f_m= 10 kHz` `m_a= 50% ` `m_a= ( E_("max")-E_("min"))/(E_("max") + E_("min"))` ` (50)/(100)= (50-E_("min"))/(50 + E_("min"))` `50 + E_("min") = 100 - 2E_("min")` ` 3E_("min") = 50` ` E_("min")= 16.66V` Side BAND `= f_(C) PM f_(m)` `= 1500 pm 10 kHz` `=1510 & 1490 kHz`. |
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