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Q. Explain Frequency-division multiplexing?
Frequency-division multiplexing (FDM) is a technique for data transmission widely used in telephone, radio, and cable TV systems in which the transmission frequency spectrum (i.e., bandwidth) is divided into smaller bands known as subchannels.
Data transmission between two stations can be achieved in either simplex, half-duplex, or full-duplex mode. In a simplexmode,mainly used in radio and TV broadcasts, information travels only in one direction. Thismode is rarely used in data communications. In half-duplexmode, used by radio communications, information may travel in both directions, but only in one direction at a time. The transmitter becomes the receiver and vice versa. In a full-duplex mode, information may travel in both directions simultaneously. This mode, used in telephone systems, adopts two different carrier frequencies.
A 4-bit synchronous counter uses flip-flops with propagation delay times of 15 ns each. The maximum possible time required for change of state will be ? Ans. 15 ns since in sy
What is secondary list? It permits you to enhance the information presented in the basic list. The user can, for example, select a line of the basic list for which he require
Business Software Business information processing is the biggest single software application area. Discrete "systems" (e.g., payroll accounts receivable/payable
You are required to carry out the task of the Computer Systems Consultant mentioned above. Your quotation/recommendations, which must be justified, should include information wi
What are the benefits of using e-commerce? Basic Benefits of E-Commerce The main benefits are enhancing sales and reducing costs. The other advantages are as follows: 1.
is the time required by a sector to reach below read/write head. Latency Time is the time needed by a sector to reach below read/write head.
define about data movement
You will write a program that will solve a version of the common newspaper puzzle \word search." In the puzzle you are given a grid lled with characters and a list of words to nd
The most common type of non-volatile memory is the ROM device. This device is read only and the data is masked into the chip during manufacture. Variations of the ROM are one off p
Asymptotic Notations These notations are used for evaluating functions. Assume we have two functions f(n) and g(n) defined on real numbers, Theta Notation Big Notation
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