0
What else can I help you with?
Why is modulation necessary before multiplexing?
modulation means transmitting the signal which is to be transmitted along with the carrier wave, then at the receiver it is separated from the carrier and demodulated. So modulation is needed so as to transmit the signal over long distances with higher accuracy. Hence it is required before multiplexing.
What is the purpose of carrier signal in modulation?
Carrier signal is of high frequencies, it gives strength to the original signal because original signal cannot travel long distances so it needs to be strengthen a bit for transmitting. The carrier signal is a high frequency signal, called an RF. Radio Frequency signal, it is to high for the human or animal ear to detect it, so its outside the audible spectrum and can easily be transmitted over the air to receivers that is tuned to receive that frequency and detect any modulation on that signal.
Why is it necessary to modulate the picture and sound signals before transmission?
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).
How is electricity transmitted in cables?
Electricity is transmitted in cables through the flow of electric current, which is carried by conductive materials, typically copper or aluminum. The cables are insulated to prevent energy loss and protect against electrical hazards. High-voltage transmission is often used to minimize energy loss over long distances, with step-up transformers increasing voltage at the source and step-down transformers reducing it for local distribution. This efficient system allows electricity to travel from power plants to homes and businesses.
Why is the frequency spectrum of a discrete signal repetitions of the spectrum of the analog signal?
The analog signal is converted to discrete signal. Even after the conversion, the frequency of the actual signal still remains the same. If the frequency of the discrete signal is different from the analog signal, the reconstructed signal would be different again. This is not what we expect. So base spectrum for similar signals have same frequencies, whether they are discrete or analog. Why do the repetitions occur? The original analog signal is multiplied with a dirac pattern. The base frequency is then shifted to the places, where diracs are available. So long the diracs keep repeating, the base frequency do repeats. Hope you are convinced with my answer
What weakens the WiFi signal?
long distances
What happens to the electrical energy when power is transmitted through long distances?
Because wires are not perfect conductors, energy is released as heat. This is why electricity is transmitted at very high voltage and low current to reduce energy loss.
What happens when electricity is transmitted over long distances?
When electricity is transmitted over long distances, it can experience energy losses in the form of heat due to resistance in the transmission lines. This can lead to a decrease in voltage levels, which may require additional equipment such as transformers to boost the voltage back up along the way. Additionally, environmental factors like temperature and weather conditions can also affect the efficiency of electricity transmission over long distances.
Why is modulation necessary before multiplexing?
modulation means transmitting the signal which is to be transmitted along with the carrier wave, then at the receiver it is separated from the carrier and demodulated. So modulation is needed so as to transmit the signal over long distances with higher accuracy. Hence it is required before multiplexing.
What is the purpose of carrier signal in modulation?
Carrier signal is of high frequencies, it gives strength to the original signal because original signal cannot travel long distances so it needs to be strengthen a bit for transmitting. The carrier signal is a high frequency signal, called an RF. Radio Frequency signal, it is to high for the human or animal ear to detect it, so its outside the audible spectrum and can easily be transmitted over the air to receivers that is tuned to receive that frequency and detect any modulation on that signal.
What is message signal in amplitude modulation?
In amplitude modulation (AM), the message signal is the original audio or information signal that contains the content to be transmitted, such as voice, music, or data. This signal is typically a low-frequency waveform that varies in amplitude. The message signal modulates the amplitude of a higher frequency carrier wave, which translates the information for efficient transmission over long distances. The result is a modulated wave that carries the original message signal within its amplitude variations.
Do you need shielded XLR cable for long distances?
Yes, their purpose is to prevent any unwanted noise in the signal.
Were does RF modulation occur?
RF modulation occurs in various communication systems, including radio broadcasting, television transmission, and mobile communications. It takes place in the transmitter, where the baseband signal (audio, video, or data) is combined with a carrier wave to create a modulated signal that can be transmitted over long distances. Additionally, modulation can also occur in the receiver, where the received signal is demodulated to retrieve the original baseband information.
Why DC losses its power when transmitted over long distances?
A: It does not loose its strenght it just becomes less due to the resistances or impedance's along the way.
How does a signal move through a neuron?
A signal moves through a neuron by traveling along the axon, which is a long, thin extension of the neuron. The signal is transmitted as an electrical impulse called an action potential. When the signal reaches the end of the axon, it triggers the release of neurotransmitters, which then carry the signal to the next neuron.
What network component is used to extend the distance the signal can travel by generating the signal?
A network component used to extend the distance a signal can travel is a repeater. Repeaters regenerate and amplify the signal, allowing it to cover longer distances without degradation. This is particularly important in networking environments where signal loss can occur over long cable runs or through physical obstacles. By boosting the signal, repeaters ensure reliable communication over extended distances.
How far can a radio signal travel and what factors influence its range?
A radio signal can travel long distances, potentially thousands of miles. The range of a radio signal is influenced by factors such as frequency, power of the transmitter, antenna height, atmospheric conditions, and obstacles in the signal path.
