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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.
What is imprecise and precise exception? Situation in which one or more of the succeeding instructions have been implemented to completion is known as imprecise exception. Situ
The CCITT standard bandwidth for speech is: (A) 20000 Hz (B) 15000 Hz (C) 7000 Hz (D) 3400 Hz Ans:
What are the simplest way to restrict the users The simplest way to restrict the users to peek inside the internals of the Web site is to use firewalls, where the information c
Q. How can we Resize Layout Cells? To precisely design a page, you can set size of cells you add in a document. You can reposition cells in the page as well. 1. Click o
Defining Types of Data ? The subsequent format is used for defining data definition: Format for data definition: {Name} Name - a program references the data
how to draw dfd on this??
The conversation speed of an analog to digital converter is maximum with which technique? Ans. With parallel comparator AD converter technique the conversation speed of an ana
Scientific knowledge: This is not to be confused with the applications of "AI" programs to other sciences, discussed later. Its subfields can be classified into a variety of t
What is a Map? A Map is an Array, which having the addresses of the free space in the swap device that are allocatable resources, and the number of the resource units available
What are the categories of Radio communication 1. Sky wave or ionosphere communication 2. Line-of-sight (LOS) microwave communication limited by horizon 3. Troposphere
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