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Q. What do you mean by communication channel?
The communication channel (transmissionmedium) is the physicalmediumthat is utilized to send the signal from the transmitter to the receiver. In wireless transmission, such as microwave radio, the transmission medium is usually the atmosphere or free space. Telephone channels, on the other hand, employ a variety of physical media such as wire lines and optical fiber cables. Irrespective of the type of physical medium for signal transmission, the essential feature is that the transmitted signal is corrupted in a random manner by a variety of possible mechanisms. For simplicity, the effects of these phenomena (attenuation, distortion, interference, noise, etc.) are shown at the center of Figure, since the transmission medium is often the most vulnerable part of a communication system, particularly over long distances.
Attenuation, caused by losses within the system, reduces the size or strength of the signal, whereas distortion is any alteration of the waveshape itself due to energy storage and/or non-linearities. Contamination by extraneous signals causes interference, whereas noise emanates from sources both internal and external to the system. To eliminate any one of these may pose a challenge to the design engineer.
how does it work explain with figure?
Q. A three-phase, 600-kVA, 2300:230-V,Y-Y trans-former bank has an iron loss of 4400Wand a full-load copper loss of 7600 W. Find the efficiency of the transformer for 70%full load
Q. Explain working of three-phase transformers? Transformation in three-phase systems can be accomplished in either of two ways: (1) connecting three identical single-phase tra
HILDA ( Output) It is called hold acknowledge signals it is active high i e it goes high when microprocessor receives HOLD signal.
Q. Explain working of induction machine rotor? The induction machine rotor may be one of two types: the wound rotor or the squirrel-cage rotor. The wound rotor has a polyphase
Q. Describe the Lastprivate Clause? The lastprivate clause declares one or more list items to be private to a thread in additin causes corresponding original list item to be up
Paper is hygroscopic and absorbent. This statement is true or false. Ans: Paper is hygroscopic and absorbent. This statement is true.
Unconditional Jump JMP ( Unconditional Jump ) Instruction: This instruction is used to transfer the execution to the specified memory address unconditionally ( does not c
describe the working and construction diagram of nicholas prism
introduction for on ac circuits
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