A speech single of 3 KHz is used to modulate a carrier of frequency 1 MHz, using amplitude modulation. the frequencies of the side band will be

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Solution

side and frequencies: The ATM wave contains three frequencies fc

$(f c + f m)$ and $(f c - f m)$ is called frequency, 0

$(f c + f m)$ and $(f c - f m)$ are called sideband frequencies.

$(f c + f m) :$ Upper sideband (USB) frequency

$(f c - f m) :$ Lower sideband (LSB) frequency

Sideband frequencies are generally close to the carrier frequency.
Here $F c = 1 M H z = 1000 K H z$
$F m = 3 K H z$
Fc ± Fm = 1000 ± 3
$= 1003 K H z$ and $997 K H z$

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