The key difference between modulation and demodulation is that modulation is done at the transmitter side while demodulation is done at the receiver side of a communication system. Modulation is basically done to transmit data to longer distance whereas demodulation is done to regain the original message signal..
Correspondingly, what is a modulator and demodulator?
Modulator is a device that modulates the the message signal (i.e the signal which you want to transmit to another place) with a carrier signal of very high frequency. for demodulator , it is the device that separates the message signal from the carrier signal in the receiver.
Furthermore, what is the work of modulator? Modulation is what takes a signal from low frequencies (the message) and pulls it up to a higher frequency (the carrier). The idea is simple: Multiply your message by a high frequency carrier, such as 680 kHz. Voila, that's AM radio!
Beside above, which device is a modulator and demodulator?
Short for modulator/demodulator, a modem is a hardware device that allows a computer to send and receive information over telephone lines. When sending a signal, the device converts ("modulates") digital data to an analog audio signal, and transmits it over a telephone line.
Why do we need modulation and demodulation?
At the broadcasting station, modulation is done to transmit the audio signal over larger distances to a receiver. When the modulated wave is picked up by the radio receiver, it is necessary to recover the audio signal from it. This process is accomplished in the radio receiver and is called demodulation.
Related Question Answers
What are the types of modulation?
There are 3 basic types of modulation: Amplitude modulation, Frequency modulation, and Phase modulation. a type of modulation where the amplitude of the carrier signal is modulated (changed) in proportion to the message signal while the frequency and phase are kept constant.What is modulation in simple words?
Modulation is the process of converting data into radio waves by adding information to an electronic or optical carrier signal. Modulation is usually applied to electromagnetic signals: radio waves, lasers/optics and computer networks.Why do we need frequency modulation?
The reason why we do modulation at all is so that we can transmit signals of one frequency at another frequency. There would be an insane amount of interference if everyone transmitted at the same frequency. That's why we transform the frequency to a higher carrier frequency before transmitting.What does modulator mean?
Modulation is a process through which audio, video, image or text information is added to an electrical or optical carrier signal to be transmitted over a telecommunication or electronic medium.What is a modulator in biology?
In pharmacology and biochemistry, allosteric modulators are a group of substances that bind to a receptor to change that receptor's response to stimulus. Modulators and agonists can both be called receptor ligands. Modulators are either positive, negative or neutral.What is the importance of modulation index?
significance of modulation index. It is used to determine the strength and quality of transmitted signal. If the modulation index is small, then the amount of variation in the carrier amplitude is small.What do you mean by repeater?
In telecommunications, a repeater is an electronic device that receives a signal and retransmits it. Repeaters are used to extend transmissions so that the signal can cover longer distances or be received on the other side of an obstruction.What is modulation technique?
Modulation is the process of converting data into electrical signals optimized for transmission. Modulation techniques are roughly divided into four types: Analog modulation, Digital modulation, Pulse modulation , and Spread spectrum method.What are the two types of modem?
There are two different types of modem: Ethernet modems that plug into the network card in the computer, and wireless modems that connect to a computer using a wireless LAN (WLAN). Some modems offer dual Ethernet and USB connection. There are also routers with integrated ADSL modem.How do I make an AM signal?
AM generation involves mixing of a carrier and an information signal. In low level modulation, the message signal and carrier signal are modulated at low power levels and then amplified. The advantage of this technique is that a small audio amplifier is sufficient to amplify the message signal.What type of modulation is used in cell phones?
GSM cell phones widely use a popular combination, Gaussian filtered MSK (GMSK), which allows a data rate of 270 kbits/s in a 200-kHz channel. A very popular digital modulation scheme, binary phase shift keying (BPSK), shifts the carrier sine wave 180° for each change in binary state (Fig. 2).What is coherent demodulator?
Coherent demodulation is also called synchronous demodulation and it is suitable for all the demodulation of linear modulation signals. Coherent demodulation usually uses a multiplier to multiply the input a reference signal that is coherent with the carrier frequency and the carrier frequency.What is modem and its uses?
Modem is abbreviation for Modulator – Demodulator. Modems are used for data transfer from one computer network to another computer network through telephone lines. The computer network works in digital mode, while analog technology is used for carrying massages across phone lines.What is modem used for?
A modem is a device or program that enables a computer to transmit data over, for example, telephone or cable lines. Computer information is stored digitally, whereas information transmitted over telephone lines is transmitted in the form of analog waves. A modem converts between these two forms.Is modem input or output?
The modem is an input and an output device. It is used for sending and receiving information and data over telephone lines. There are at least two ways that can be used to represent data and information electronically. One way is digital and another way is analogue.Why is modem called modulator and demodulator?
Modem is short for "Modulator-Demodulator." It is a hardware component that allows a computer or another device, such as a router or switch, to connect to the Internet. It converts or "modulates" an analog signal from a telephone or cable wire to digital data (1s and 0s) that a computer can recognize.What is the purpose of modulator?
To modulate means change some parameters of a wave as function of another wave. The eldest modulation was Amplitude modulation - Wikipedia in which a high frequency signal is multiplied by a low frequency signal. So a modulator is a device capable of modulate a carrier using a signal to be sent.What is a modulator used for?
RF modulators are used to convert signals from devices such as media players, VCRs and game consoles to a format that can be handled by a device designed to receive a modulated RF input, such as a radio or television receiver.What are the advantages of modulation?
Advantages of Modulation Antenna size gets reduced. No signal mixing occurs. Communication range increases. Multiplexing of signals occur. 
