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  3. question 9 15 points a prosses output is shown...

Question: question 9 15 points a prosses output is shown...

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Question 9 : (15 points) A prosses output is shown below. If the true signal is given by T(t)- cos(2r.ft)+cos(2n.f21) where f,-150 Hz and f- 50 Hz. a) Sketch the frequency spectrum of the signal b) If the signal is sampled at 200 Hz , sketch the digitized signal when a first-order hold used. Find the apparent frequency e) What should the minimum sampling frequenoy be? What sampling frequency do you suggest for better result? flt) 2.5 2,5 0,5 0,03 0,04 0,02 0,01 -1 1,5 -2 2,5

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