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Why is it necessary to modulate the picture and sound signals before transmission?
Wiki User
∙ 6y ago
To avoiding the noise signal effect.Because the modulation is a technic which providing a high characteristic to transmitting the signal on long or short distance.Because the modulated signal received as high bandwidth,high performance of received signal and the modulation Technic is provide a less hight of antenna in wireless transmission which is expressed in the term :(hight of antenna=λ/4).
Wiki User
∙ 12y ago
Wiki User
∙ 6y agoModulation can be thought of as the addition of what we want to transmit to the carrier signal. We say that we modulate (add information or intelligence to) that carrier, so given that, it is fairly easy to see that we are required to modulate the carrier before we transmit that carrier signal. Without any modulation, the carrier is the only thing transmitted. We'd see only that carrier if we intercepted or received the signal.
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What is mode of transmission of tv signals?
The most common mode of transmission of TV signals are digital satellite and cable. New technologies allow transmission of signals by digital terrestrial TV, using aerial broadcasts to a conventional antenna. This provides a greater number of channels and a better picture and sound quality.
How are microwaves transmitted?
Microwaves are electromagnetic radiation. They are electromagnetic waves, and they are transmitted like light or radio waves, both of which are forms of electromagnetic radiation. The radiation leaves the microwave source in waves, and this radiation will travel effortlessly through a vacuum, and with a bit of loss through air.
Voice signals are signals whereas computer signals are?
Voice signals are analog signals, whereas computer signals are digital .
What are the Advantages of MUX over DeMUX?
Multiplexing is the combination of several signals on one carrier or medium. Demultiplexing is the extraction of each of the original signals. You can't have just one or the other, they are both necessary in the communication process. So the concept of one having an advantage over the other is senseless.
Advantages and disadvantages of time division multiplexing?
Advantages of TDMA 1. The user gets full bandwidth of the channel in a particuler time slot. 2. For bursty signals such as voice or speech TDMA gives maximum utilization of the channel 3. most suitable technique for digital transmission. Disadvantages of TDMA 1. it is not much suitable for continues signals 2. extra guard time are necessary 3. synchronization is necessary.
We modulate several voice signals and send them through the air. Is this baseband or broadband transmission l?
it is baseband transmission
Is fan is an electronic or electrical?
electrical. it does not amplify or modulate signals.
Whatis the function of modem?
MOdulate/DEModulate. It converts digital computer signals into analog ones for transmission over analog telephone lines, and then converts the signal back into digital on the other end.
What is a device that translates computer signals to analog signals suitable for sending across phone lines?
A modem. Short for MOdulate-DEModulate.
What is mode of transmission of tv signals?
The most common mode of transmission of TV signals are digital satellite and cable. New technologies allow transmission of signals by digital terrestrial TV, using aerial broadcasts to a conventional antenna. This provides a greater number of channels and a better picture and sound quality.
Why is it necessary to digitize voice signals?
To minimize the distortion of analog signals during transmission Because digital lines transmit signals more efficiently across distances than analog lines Because many telephone networks are moving over to digital interfaces
What are chemicals which relay amplify and modulate signals between a neuron and another cell?
Neurotransmitters are chemicals that send messages from one cell to another.
What method of signal transmission uses radio waves to carry signals?
The analog method of signal transmission uses radio waves to carry signals. Digital transmission involves the use of satellites to transmit signals.
What are the disadvantages of Microwave transmission?
They can be interfered by other transmission signals
How do you get the picture from satellites?
The satellite takes a picture and sends it by signals.
What has the author Louis-martin Boucher written?
Louis-martin Boucher has written: 'T-cell receptor associated signals that modulate lymphocyte homeostasis'
What exactly is a VHF radio used for?
It is used for sending wireless signals over the Very High Frequency band of radio. This band is mainly used for television signals. It can also be used to modulate a television signal in a single cable.
