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What will be seen in the scope if the step time is 1 second in the following Simulink Model?(a) A unit step signal delayed by 2 units in time(b) u[n-3](c) A ramp function(d) An impulse functionThis question was addressed to me in an internship interview.The origin of the question is Z Transform topic in division Digital Signal Processing of MATLAB

Answer»

Correct answer is (b) u[n-3]

For explanation I WOULD say: SINCE the step time is 1, the INPUT step signal is delayed by 1 UNIT already. MOREOVER, multiplying the signal by z-2 delays the signal further by 2 units.



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