Sampling Theory and Pulse Modulation

May be represented by g(t) = g(t + T0) Value may be determined at any point Repeats itself at regular intervals All of the above Periodic signal Aperiodic signal Deterministic signal Both a and c fs ≥ 2fm fs < 2fm fs > fm fs < fm The sampled signal is passed through low pass filter Filter has the cut off frequency wm Both a and b None of the above fs > 2fm fs < 2fm fs = 2fm fs ≥ 2fm Discontinuous at time t=0 Starts at time t=0 and linearly increases with t Both a and b None of the above 300Hz 600Hz 150Hz 200Hz Passes the frequencies lower than the specified cut off frequency Rejects higher frequencies Is used to recover signal from sampled signal All of the above Instantaneous sampling Natural sampling Flat top sampling All of the above Amplitude of the pulse train is varied Width of the pulse train is varied Frequency of the pulse train is varied None of the above Synchronization is required between transmitter and receiver Large bandwidth is required as compared to PAM None of the above Both a and b Synchronization is not required between transmitter and receiver Amplitude of the carrier pulse is varied Instantaneous power at the transmitter is constant None of the above Leading edge of the pulse is kept constant Tail edge of the pulse is kept constant Centre of the pulse is kept constant All of the above Amplitude of the carrier is constant Position or width of the carrier varies with modulating signal Pulse width modulation and pulse position modulation are the types of PTM All of the above Pulse width modulation Pulse position modulation Pulse amplitude modulation Both a and b