In the system of Figure E-17 let the CTFT of the the excitation be 
This system is sometimes called a scrambler because it moves the frequency components of a signal to new locations making it unintelligible.
(a) Using only an analog multiplier and an ideal filter, design a “descrambler” that would recover the original signal.
(b) Sketch the magnitude spectrum of each of the signals in the scrambler-descrambler system.
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Technician A says that fluid level concerns rarely contribute to automatic transmission concerns. Technician B says that dark, burnt ATF means the PCM is improperly commanding shift activity. Which technician is correct?
A) Technician A only
B) Technician B only
C) Both technicians A and B
D) Neither technician A nor B
What is the Cummins online service information system software known as?
A. Cummins online service information (COSI) B. Service information system (SIS) C. Interact System (IS) D. QuickServe online (QSOL)
Two relatively inexpensive alternatives are available for reducing potential earthquake damage at a top secret government research site. The cash flow estimates for each alternative are given below. At an interest rate of 8% per year, use the B/C ratio method to determine which one should be selected. Use a 20-year study period, and assume the damage costs would occur in the middle of the study period, that is, in year 10.
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A positive clamper has an RD1 of 12 ?, an RL of 12 k?, and a C1 of 2 ?F. The capacitor charge time is
A) 120 ms B) 24 ?s C) 120 ?s D) 12 ?s