Modulation and Demodulation-2 Starter Quiz

12 signals each band limited to 5 kHz are to be transmitted over a signal channel by frequency division multiplexing. If AM – SSB modulation guard band if a 1 kHz is used, then the bandwidth of the multiplexed signal will be

A spectrum of (1000 – 1650) kHz is assigned for DSB – SC AM transmission. The spectrum is shared for different users using frequency division multiplexing and quadrature carrier multiplexing. If each user has a message BW of 5 KHz, then the maximum number of users that can simultaneously use the spectrum will be

For a DSB transmission, the message signal is given by m(t) = cos 200πt. If the carrier amplitude is A_c=10, what will be the transmission bandwidth B_T (in Hz) and total power P_t (in Watt) of the modulated signal respectively?

The message signal m(t) = 4 cos(300t) + DSB-SC modulated the carrier C(t) = 5cos(9000t). The average power of the modulated signal will be _____ watt.

A non-linear device has transfer characteristic given by I = (4 + v_i + v_i²) mA is supplied with a carrier of 2 V amplitude and a sinusoidal signal of 1 V amplitude in series. The modulation index is