Analog Communication System MCQs

As the modulation index of an FM signal with sinusoidal modulation is increased from zero to three, the power in the carrier component will

The ratio amplitude modulation with identical total transmitted power (mf is modulated index of FM) is9 ,

A radio station works at 800 kHz and uses AM. If this is a public broadcast system, it should transmit using

Four signals each band-limited to 5 kHz are sampled at twice the Nyquist rate. The resulting PAM samples are transmitted over a single channel after time division multiplexing. The theoretical minimum transmission bandwidth of the channel should be equal to

Which one of the followingstatements regarding the following signal : x(t) = 5 sin (2n x 1030 sin(2n x 1060 is correct?

In case a signal band limited to fm is sampled at a rate less than 2 fm, the constructed signal will be

An arbitrary signal m(t) has zero average value and it is band-limited to 3.2 kHz. It is sampled at the rate of 8k samples/s. The samples are passed through an ideal band-phass filter with centre frequency of 3.2 kHz and bandwidth of 6.4 kHz. The output of the band-pass filter is

If the radiated power of AM transmitter is 10 kW, the power in thecarrier for modulation index of 0.6 is nearly

One of the main functions of the RF amplifiers in a superheterodyne receiver is to