Communication Systems - Engineering

Q1:

The bandwidth of DSB suppressed carrier modulation system when the modulating frequency varies between 500 Hz and 5 kHz is

A 555 kHz

B 505 kHz

C 500 kHz

D 9 kHz

ANS:D - 9 kHz

fm = 5 kHz - 500 Hz  4.5 kHz Bandwidth = 2 fm  2 x 4.5 kHz = 9 kHz.