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What will be seen in the Scope if the step time is 0 seconds in the following Simulink Model and the limit of x axis is n=10?

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What will be seen in the Scope if the step time is 0 seconds in the following Simulink Model and the limit of x axis is n=10?

(a) A delayed ramp function

(b) r[n-1]

(c) r[n-2]

(d) Error

I got this question in an internship interview.

My enquiry is from Z Transform in chapter Digital Signal Processing of MATLAB

1 Answer

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Right choice is (b) r[n-1]

The explanation is: The output of the transfer function has a the function r[n+1] and it gets delayed by two units in time to become r[n-1]. This is why the Display of the model shows 9 at n=10.

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