In amplitude modulation,the modulation index | vedclass

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(B) In amplitude modulation,the modulation index is defined as $m = A_m / A_c$. If $m > 1$,it is called over-modulation. During over-modulation,the en

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$m > 1$ will result in overlapping of both sidebands,resulting in the loss of information.

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(B) In amplitude modulation,the modulation index is defined as $m = A_m / A_c$. If $m > 1$,it is called over-modulation. During over-modulation,the envelope of the modulated signal becomes distorted because the carrier wave amplitude becomes zero or negative at certain points. This leads to the overlapping of sidebands,which causes significant distortion and the loss of information during the demodulation process. Therefore,to ensure faithful reproduction of the signal,$m$ is kept $\leq 1$.

Column $A$	Column $B$
$A$. $D$-layer	$I$. $250-400 \ km$
$B$. $E$-layer	$II$. $170-190 \ km$
$C$. $F_1$-layer	$III$. $95-120 \ km$
$D$. $F_2$-layer	$IV$. $65-75 \ km$

In amplitude modulation,the modulation index $m$ is kept less than or equal to $1$ because

Similar Questions

Match Column $A$ (layers in the ionosphere for skywave propagation) with Column $B$ (their height range).
Column $A$ Column $B$
$A$. $D$-layer $I$. $250-400 \ km$
$B$. $E$-layer $II$. $170-190 \ km$
$C$. $F_1$-layer $III$. $95-120 \ km$
$D$. $F_2$-layer $IV$. $65-75 \ km$

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