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In a double side-band (DSB) full carrier AM transmission system, if the modulation index is doubled, then the ratio of total sideband power to the carrier power increases by afactor of ............. |
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Answer» factor of 4 The AM system is Double side band (DSB) with full carrier. The expression for total power in such modulation signal is pt = \(\cfrac{Ec^2}{2R}\) + \(\cfrac{\mu^2E_{c^2}}{4\,2R}\) pt = pc + \(\cfrac{\mu^2}2\) pc pSB = \(\cfrac{\mu^2}2\) pc \(\cfrac{p_{SB}}{p_c}\) = \(\cfrac{\mu^2}2\) Now if µ (modulation index) is doubled then PSB/PC Will be 4 times |
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