ECT263 Week 6 Quiz - Grading Summary These are the automatically computed results of your exam Grades for essay questions and comments from your

ECT263 Week 6 Quiz - Grading Summary These are the...

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Grading Summary These are the automatically computed results of your exam. Grades for essay questions, and comments from your instructor, are in the "Details" section below. Date Taken: 6/13/2016 Time Spent: 15 min , 50 secs Points Received: 30 / 50 (60%) Question Type: # Of Questions: # Correct: True/False 2 1 Multiple Choice 3 2 Grade Details - All Questions Question 1.Question :(TCO 6) Referring to the block diagram below, which block is the discriminator? Student Answer:ABCDFInstructor Explanation:The discriminator is placed at the output of last IF amplifier (E). Therefore, the block F is the discriminator. Points Received: 10 of 10 Comments: Question 2.Question :(TCO 6) If an FM receiver is tuned to receive a carrier frequency of 160.5MHz and uses high-side injection, what would be the frequency of the local oscillator?
f LO = f c +IF=160.5 MHz+10.7 MHz=171.2 MHz Points Received: 0 of 10 Comments: Question 3.Question :(TCO 6) If an FM receiver is tuned to receive a carrier frequency of 160.50MHz and is using low-side injection, what would the image frequency be? Student Answer:139.1MHz149.8MHz171.2MHz181.9MHzNone of the above.Instructor Explanation:f IM = f c −2IF=160.5 MHz−2( 10.7 MHz )=139.1 MHz Points Received: 10 of 10 Comments: Question 4.Question :The Phase Comparator in the PLL can be implemented using a Multiplier. StudentAnswer:TrueFalse
Points Received: 0 of 10 Comments: Question 5.Question :In AM system, the recovered information signal can be obtained from the output of the lowpass filter in the AM Demodulator. StudentAnswer:TrueFalse Points Received: 10 of 10 Comments: * Times are displayed in (GMT-07:00) Mountain Time (US & Canada)

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