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When a sinusoidal signal is used to frequency modulate a VHF carrier, the required bandwidth is 200 kHz. It is desired to retain the same modulation index while reducing the necessary bandwidth to 100 kHz. What changes should be made to the input to the modulator to achieve the required deviation?
The temperature of water in a 25 gallon water heater is supposed to be raised from 60 deg F to 125 deg F. Compare the cost of using electricity and natural gas to heat the water.
a DC shunt machine ( 24kW, 240V, 1000 RPM) has Ra= .12 ohms, Nf= 600 turns/pol. The machine is operated as a seperately excited dc generator and is driven at 1000 RPM. When If = 1.8 amps the no load terminal voltage is 240V.
Find the complex impedance of the inductance. Find the phasor voltage and current, and construct a phasor diagram. Write the current as a function of time. Sketch the voltage and current to scale versus time. State the phase relationship between t..
stochastic message signal, m(t), is transmitted down a (noiseless) cable channel by PCM, using an 8-bit code. If the ambient signal is equally likely to lie anywhere between its two extremes, (+/- mp), calculate the ration of the mean squared sign..
a signal franging from 1khz to 100khz will be put into a davice that will need amplification that will output to speakers. A 12v battery is available as a power source, however the current out of the battery should be kept to a minimum.
Write a short report that analyses the P&ID - Basic Neutralizer Control System: The neutralizer process may be used to adjust the pH of a feed stream.
assume QPSK is the modulation method used in a digital communication system.The communication system requires minimum bit error.what is the acceptable bit error assuming additive white gaussian noise.
Why is the input voltage into the diode in a full-wave rectifier not smooth but the input voltage into the diode in a half-wave rectifier smooth, graphically speaking
Three single-phase transformers rated at 15kVA, 480V/120V,60Hz are connected in delta to function as autotransformers on a 600V,3-phase line. The H1,H2,X1,X2 polarity marks appear on the metal housing.
1. can a transformer ratio LTC control MW or Mvar power flow on a parallel transformers 2.what test is used to calculate a transformer through fault impedance 3. List three design or operating factors which make a generator more stable
Find out the birthday (month and day but not year) of a randomly chosen person. What is the sample space of the experiment. How many outcomes are in the event that the person is born in July
contrast the electron and hole drift velocities through a 10-µm layer of intrinsic silicon across which a voltage of 5 V is imposed. Let µn = 1350 cm²/V·s and µp = 480 cm²/V·s.
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