For signal transmission, modulation is necessary
- To reduce distortion of the signal
- To modify the frequency content of the signal
- To mask the signal information from enemy
- To radiate the signal to a large distance using antennas
The Correct Option is D
Solution and Explanation
Thus, this process of modulation is necessary to radiate the signal to a large distance using antennas.
Top Questions on communication systems
In amplitude modulation, the amplitude of the carrier signal is 28 V and the modulation index is 0.4. The amplitude of the side bands is:
- AP EAMCET - 2024
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In the given figures of logic gates, if the inputs are A=1, B=0, and C=1, find the values of \( y_1 \), \( y_2 \), and \( y_3 \) respectively.
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- The time gap between 44% decay and 93% decay of a radioactive substance is 81 minutes. The half-life of the radioactive substance in minutes is:
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The ratio of the wavelengths of the first and second Balmer lines of the hydrogen spectrum is:
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A proton and an alpha particle are moving with kinetic energies of 4.5 MeV and 0.5 MeV respectively. The ratio of the de Broglie wavelengths of the proton and alpha particle is:
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Questions Asked in KEAM exam
Two circles \(C_1\) and \(C_2\) have radii 18 and 12 units, respectively. If an arc of length \( \ell \) of \(C_1\) subtends an angle 80° at the centre, then the angle subtended by an arc of same length \( \ell \) of \(C_2\) at the centre is:
- KEAM - 2024
- Magnitude and Directions of a Vector
- If \( \tan \left( \frac{\pi}{12} + 2x \right) = \cot 3x \), where \( 0<x<\frac{\pi}{2} \), then the value of \( x \) is:
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- Integration
If \( 2 \) is a solution of the inequality \( \frac{x-a}{a-2x}<-3 \), then \( a \) must lie in the interval:
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- The centre of a square is at the origin of the complex plane. If one of the vertices is at \( -3i \), then the area of the square is:
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- Number of integers greater than 7000 can be formed using the digits 2, 4, 5, 7, 8 is (Repetition of digits is not allowed):
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Concepts Used:
Communication Systems
A system that describes the information exchange between two points is called the communication system. The transmission and reception process of information is called communication. The major elements of communication are such as:
- The Transmitter of information
- Channel or medium of communication
- The Receiver of information
Examples Of Communication Systems:
The following are the examples of communication systems:
- Internet
- Public Switched Telephone network
- Intranet and Extranet
- Television
Types Of Communication Systems:
Turning on Signal specification or technology, the communication system is categorized as follows:
- Analog technology communicates data as electronic signals of differing frequencies or amplitude. For instance Broadcast and telephone transmission.
- In Digital technology, the data are created and processed in two states: High (represented as 1) and Low (represented as 0). Also this technology stores and transmits data in the form of 1's and 0's.
Elements of a Communication System:
