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1- the depth of modulation of an AM waveform that reached a maximum amplitude of 20v and a minimum amplitude of 2.7 v could be expressed as approximatly :
a-3.1 %b-.76c-.13d-7.62%
2- if a carrier wave of 200 khz is amplitude modulated by an audio signal which has frequency components betwen 300 hz & 3,4 khz the lowest frequency component of the resulting DSP AM wave would be :
a-300 hzb-199.7 khzc-196.6 khzd-3.4 khz
3- a 10 khz sinsudal signal is used to amplitude modulate a sinsoidal carrier frequency of 50 khz the number of frequency components that would be included in the resulting DSP AM waveform would be :
a-5b-2c-3d-many hundreds
compute the power loss in a transmission line with a resistance of 0.05 ohms/mile. Compute the power loss if 500kW of power is transmitted from a power generating station to cities at distances of 20,30,40....100 miles at 100v and 200v.
What is the function of the enable control input of a tri-state buffer If the output of two or more tri-state buffers is connected to each other, what is the restriction on enable control input lines
(1) If you have a transformer that is not in a circuit, how can you tell/determine what the ratio is (2) How do you tell if a diode is forward or bias. How much voltage is assumed dropped across a forward biased silicon diode.
Design, simulate and program a 4-bit, 8-function ALU to implement the operations F2 F1 F0 Output Function S0 - S4 0 0 0 Output = A Input S = A 0 0 1 Output = A Complement S = NOT A 0 1 0 Output = A Plus B S = A + B0 1 1 Output = A Minus B S = A - B
Make a plot of group velocity versus frequency for frequencies from 0 Hz to 500 kHz. Your plot should have 3 different curves for the three modes of propagation. Be sure to identify the modes and all cutoff and resonant frequencies clearly.
a circuit for an ac voltmeter utilizes a moving-coil meter that gives a full-scale reading when the average current flowing throught it is 1mA. The moving-coil meter has a 50-ohm resistance.
Let x(t) = |cos120pit| a periodic signal. Plot x(t). What is the period and frequency of x(t). Expand x(t) in trigonometric Fourier series Hint: use the plot to find the Fourier coefficients.
Steam enters a reversible, adiabatic (isentropic) turbine at 8 MPa and 550 oC with a mass flow rate of 3.6 kg/sec. The pressure of the steam flow at the turbine exit is 250 kPa. Neglect the changes in potential and kinetic energies of the flow thr..
A factory is to be supplied with 408Y/277 3 phase, 4 wire electrical service. The total estimated single-phase load is 25 kW, at .9 lagging power factor. The total estimated three-phase load is 250 kW at .85 lagging power factor.
Choose a product or technology that uses base band digital communi- cations and find out what line code it uses. You may not choose RS-232 serial links or similar, or Ethernet because we talked about their line codes in class.
Two transistors, fabricated with the same technology but having different junction areas, when operated at a base emitter voltage of 0.75V, have collector currents of 0.2mA and 5mA. A. Find Is for each device.
Consider a satellite communication link with a one way propagation delay of 300ms between the sender and receiver, operating at 10Mbps using packets of length 1500bytes. Length of the ACK packet is also 1500 bytes.
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