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1. (TCO 1) In order to convert power into dB, we use 10log(X), but in order to convert voltage into dB we use 20log(x). Explain why. 2. (TCO 2) If SNR at the input of a system is 25 dB and SNR at the output of a system is 22 dB, what is the noise figure in dBs? 3. (TCO 2) Explain what is meant by a distorted signal. + 4. (TCO 3) If you are tuned to an AM station at 680 kHz, what are the frequency components of the AM signal? 5. (TCO 4) A 5-volt intelligence amplitude causes the frequency to change to ± 25 kHz, what will be the carrier frequency variation corresponding to an intelligence amplitude of 10 volts? 6. (TCO 4) What are the two functions of a limiter? 7. (TCO 5) How can we reduce quantization error in a PCM signal? 8. (TCO 6) What is the bandwidth efficiency for a 64-PSK system? 9. (TCO 7) Explain the difference between TDM and TDMA.
Due to the current, the temperature of the wire is raised by T in atime t. A number N of similar cells is now connected in series with a wire of the samematerial and cross-section but of length 2L.
There are 5 inductors in series and they are 1H,2H,3H,4H,5H what is the total equivalent inductance. There are 5 capacitors in series and they are 1F,2F,3F,4F,5F. what is the total equivalent capacitance.
Early scientific researchers hypothesized that electricity was an invisible fluid that could move through certain substances. Those substances "porous" to this "fluid" were called conductors, while substances impervious to this "fluid" were called..
Six input voltage sources (V1, V2, V3, V4, V5, V6) have a +/- 1 V range. Design a circuit to produce Vout as the most negative (smallest) of (V1 + 2V2), (V3 - 2V4), (-V5 - 2V6). Your design should specify exact components. Note that diode drop can..
figure out how to plot the response of a system given an input. transfer function for the system is: H(s) = 1000/(s^2 + 110s + 1000) input is periodic, and represented by: u(t) - u(t-pi/2)
two metal sheets form a wedge shaped space. In cyllindrical coordinates, sheet 1 is described by (phi=0,p>0) and sheet 2 is described by (phi=30deg, p>0). A small gap at the z axis prevents the sheets from contacting
1-If the voltage is 106 V cos(84 rad/s t + 46°) and the current is 9 A cos(84 rad/s t + 72°), what is the frequency of the instantaneous power. 2- If the voltage is 101 V cos(47 rad/s t + 11°) and the current is 16 A cos(47 rad/s t + 67°).
Assume that h is a random variable with PDF. Pn(h)=0.1*d(h-1)+0.9d(h-3). n is a zero mean white gaussian noise with variance 0.5. Assume that the channel state info is available at the reciever for each of the three branches.
consider the set of activities, duration (in days), and predecessors for a project given below. a) Develop a network diagram representation for the project. b) Determine the critical path. c) Determine the float time for all activities that are not o..
a 2000kg ship initially at rest in an inertial system is accelerated along a straight line for (3.16E7 seconds) by means of a photon rocket of 300MW power. If this is accomplised using a series of He-Ne lasers with wavelength=633 nm
Consider a PCM-TDM system in which 24 signals are to be processed. Each signal has a baseband bandwidth of 3 KHz. The sampling rate has to be 33.3% higher than the theoretical minimum, and 8 bits are to be used.
A lamp of 100 candela is placed 1 m below a plane mirror which reflects 90% of light falling on it. The lamp is hung 4 m above ground. Find the illumination.
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