A modulating signal 2 (6 . 28 × 10 ^ 6 )t is added to the carrier signal 4 (12 . 56 × 10 ^ 9 )t for amplitude modulation. The combined signal is passed through a non-linear square law device. The output is then passed

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Frequencies present in output of square law device
$2{f}_{c}, {f}_{c} + {f}_{m}, {f}_{c}, {f}_{c} - {f}_{m}, 2{f}_{m}, {f}_{m}$
After passing through band pass filter, frequencies present
${f}_{c} + {f}_{m}, {f}_{c}, {f}_{c} - {f}_{m}$
Bandwidth of the output signal $= 2{f}_{m}$
$= \dfrac{2{\omega}_{m}}{2\pi} = \dfrac{6 . 28 \times {10}^{6}}{3 . 14}$ $= 2MHz$

A modulating signal 2 (6 . 28 × 10 ^ 6 )t is added to the carrier...

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