Question

A $1000kHz$ carrier is simultaneously modulated with $300Hz$, $800Hz$ and $2kHz$ audio waves. The frequencies present in the output is

• A. $999.7KHz$, $100.3KHz$, $999.2KHz$
• B. $1000.8KHz$, $998KHz$, $1002KHz$
• C. $1000.7KHz$, $998KHz$, $1002KHz$
• D. both (a) and (b)

Answer 1

The correct option is D both (a) and (b)

Frequencies present in the output $=100\pm 0.3$
$1000\pm 21$ i.e.$\to$
$999.7KHz$, $100.3KHz$, $999.2KHz$
$1000.8KHz$, $998KHz$, $1002KHz$