Electronics and Communication Engineering - Exam Questions Papers

Consider the signal flow graph shown in figure below. The gain is :

During transmission over a communicate channel, bit errors occur independently with probability . If a block of 3 bits are transmitted, the probability of at most one bit error is equal to

If x₁[n] x₁(z) with ROC = R₁ and x₂[n] x₂(z) with ROC = R₂ then ROC for x₁[n] + x₂[n] will be __________ (where R_i → Region of convergence and x₁[n] and x₂[n] are causal).

Consider a unity feedback control system with open-loop transfer function The steady state error of the system due to a unity step input is :

The analog signal given below is sampled at 1200 samples per second. m(t) = 2 sin 120 pt + 3 sin 240 pt + 4 sin 360 pt + 5 sin 480 pt + 6 sin 600 pt + 7 sin 720 pt. The folding (maximum) frequency is __________ .