ECET 345 Week 1 Quiz

Published on January 2018 | Categories: Government & Politics | Downloads: 96 | Comments: 0 | Views: 640
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1. (TCO 1) A signal that is a function of time has the following properties (or the following applies to it). 2. (TCO 1) A sinusoidal signal, 4 sin(2πt), passing through a LTI system, undergoes a gain of 0.5 and a time delay of 0.5 seconds. The resulting output signal will be mathematically described as 3. (TCO 1) Determine which of the following is a linear system by applying the principle of superposition 4. (TCO 1) A continuous time system has an output , y, which is given by . It is sampled at a frequency of 2 Hz. Determine the expression that correctly represents the discrete signal obtained after sampling and its value for n = 2. 5. (TCO 1) A signal given by 5 Cos (2*pi*36*t) + 20 Sin (2*pi*48*t) is sampled at a rate of 50 Hz. Is the Nyquist theorem violated? 6. (TCO 1) A sawtooth wave repeats itself every 0.1 seconds. The first three harmonics in this sawtooth wave have a frequency of 7. (TCO 1) A discrete time sequence is shown below in a figure. All values not shown can be assumed to be zero. Describe the sequence as a sum of undelayed (if any) and delayed step functions. 8. (TCO 1) A discrete time sequence is shown below in a figure. All values not shown can be assumed to be zero. Describe the sequence as a sum of undelayed (if any) and delayed step functions.

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1. (TCO 1) A signal that is a function of time has the following properties (or the following applies to it). 2. (TCO 1) A sinusoidal signal, 4 sin(2πt), passing through a LTI system, undergoes a gain of 0.5 and a time delay of 0.5 seconds. The resulting output signal will be mathematically described as 3. (TCO 1) Determine which of the following is a linear system by applying the principle of superposition 4. (TCO 1) A continuous time system has an output , y, which is given by . It is sampled at a frequency of 2 Hz. Determine the expression that correctly represents the discrete signal obtained after sampling and its value for n = 2. 5. (TCO 1) A signal given by 5 Cos (2*pi*36*t) + 20 Sin (2*pi*48*t) is sampled at a rate of 50 Hz. Is the Nyquist theorem violated? 6. (TCO 1) A sawtooth wave repeats itself every 0.1 seconds. The first three harmonics in this sawtooth wave have a frequency of 7. (TCO 1) A discrete time sequence is shown below in a figure. All values not shown can be assumed to be zero. Describe the sequence as a sum of undelayed (if any) and delayed step functions. 8. (TCO 1) A discrete time sequence is shown below in a figure. All values not shown can be assumed to be zero. Describe the sequence as a sum of undelayed (if any) and delayed step functions.

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