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Q. Wire-line and Fiber-optic channel?
Wire-line channels are used extensively by the telephone network for voice, data, and video transmission. Twisted-pair wire lines (with a bandwidth of several hundred kHz) and coaxial cable (with a usable bandwidth of several MHz) are basically guided electromagnetic channels.
Fiber-optic channels offer a channel bandwidth that is several orders ofmagnitude larger than coaxial cable channels. The transmitter or modulator in a fiber-optic communication system is a light source, such as a light-emitting diode (LED) or a laser, whose intensity is varied (modulated) with the message signal. The light propagates through the fiber as a light wave and is amplified periodically along the transmission path to compensate for signal attenuation. At the receiver end, the light intensity is detected by a photodiode, whose output is an electric signal that varies in direct proportion to the power of light striking on the photodiode. Optical fiber channels are replacing nearly all wire-line channels in the telephone network.
Q. Explain the function of time base generator in CRO. Sol. Oscilloscopes are used to display a waveform that varies as a function of time. If the waveform is to be accuratel
For a 45-kVA, three-phase, wye-connected, 220- V synchronous machine at rated armature current, the short-circuit load loss (total for three phases) is 1.80 kWat a temperature of 2
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Ask questCompute the mean and variance of a four-level image with histogram p(z\ ) = 0.1, p{zi) = 0.4, ?(1?) =0.3, p{za) = 0.2. Assume that z\ = 0, zi = 1, z$ = 2, and ? — ?. i
Classify the magnetic materials into diamagnetic, paramagnetic, ferromagnetic and ferrimagnetic materials. Also give examples of each. Classification of magnetic materials:-
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Q. Explain Modulation and sampling? Modulation is the process whereby the amplitude (or another characteristic) of a wave is varied as a function of the instantaneous value of
Q. A three-phase load, connected to a 440-V bus, draws 120 kWat a power factor of 0.85 lagging. In parallel with this load is a three-phase capacitor bank that is rated 50 kVAR . D
Uses of Zener Diode Zener diodes are extensively used as voltage references and like shunt regulators to regulate the voltage across small circuits. While connected in parall
Inductive Logic Programming : Now here having studied a non-symbolic approach to machine learning on Artificial Neural Networks then we return to a logical approach, namely In
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