Digital Communication System Objective Questions and Answers

176. The mean square volue of the shot noise current

177. Quadrature multiplexing is

D. the scheme where same carrier frequency is used for two different signals

178. For a given data rate, the bandwidth required with m-ary transmission is smaller than that for binary transmission by

179. Four voice signals, each limited to 4 kHz and sampled at Nyquist rate, are converted into binary PCM signal using 256 quantisation levels. The bit transmission rate for the time-division multiplexed signal will be

180. In ionosphere, the incidence angle is 60. The maximum unstable frequency will be

181. In a PCM, the amplitude levels are

182. In a DM (delta modulation) system, the granular (idling) noise occurs when the

A. modulation signal increases rapidly

B. pulse rate decreases

C. modulating signal remains constant

D. pulse amplitude decreases

Discuss in Forum

Page 26 of 37

« 24 25 26 2728 »

Electronics Engineering Objective Questions { Digital Communication System }