A modulated signal is given by `C_(m)(t) = A_(c)sin omega_(c)t+muA_(c) sin omega_(m) t sinomega_(c) t` where `mu` is modulation index . To keep the signal without distortion the value of `mu` should be

Options

A. `gt 1`
B. `gt=1`
C. `=1`
D. `lt=1`

Answer

D

Explanation

Modulation index `mu` is given by
`mu = (A_(m))/(A_(c))`
where `A_(m)` and `A_(c)` are amplitude of modulating wave and carrier wave.
`implies ` To keep signal without distortion,
` A_(m) lt= A_(c)`
i.e `mu lt=1`