Analog Signal

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ANALOG SIGNAL

ANALOG SIGNAL :-

1.An electrical impulse or an electromagnetic wave which travels a distance to convey a message, can be termed as a signal in communication system.

2.A continuous time varying which represents a time varying quantity can be termed as an Analog signal.Signals which are continuous in time and amplitude are called analog signal

3.An analog signal can take on any value in a specified range of value. As the wave moves from value A to B, it passes through and includes an infinite number of values analog its path.


Advantages of analog signals :- 

1. The main advantages is the fine definition of the analog signal which has the potential for an infinite amount of signal resolution.
2. Compared to digital signal, analog signals are of higher density.
3. Analog signals are best suited for the transmission of the audio and video.

Disadvantages of analog signal :-

1. Most of the analog systems also suffer from generation loss.
2. The effects of noise create signal loss and distortion.
3. The advantages of analog signaling is that any system has noise-i.e, random unwanted variation.

ANALOG TRANSMISSION :-


1. Analog transmission is a means of transmitting analog signals, 

2. To send the digital data over an analog media, needs to be converted into analog signals. there can be following two cases according to data formatting:

Band-pass:- The filters are used to filter and pass frequencies of interested. A bandpass is a band of  frequencies which can pass the filter.
Low-pas:- Low pass is a filter that passes low frequencies signals.

Digital-to-Analog conversion :-

1. The process of changing one or more the attributes of analog signal based on information in digital data is referred to as digital-to-analog conversion. it is also called as the modulation of the digital signal.

2. Depending on whether the amplitude, frequency or phase of the carrier signal id modified. Digital-to- analog conversion is the process of changing one of the characteristics of an analog signal based on the information in digital data. 

 3. The digital-to-analog modulating process, and the resultant analog signal. The digital-to-analog conversion is done by modem. Modem  stands for modulator and demodulator.

4. A modulator use some coding scheme and converts a digital signal into an analog signal and demodulator converts the analog signal back into the digital signal.

5. There are three kinds of digital-to-analog conversions possible as given below :
>. Amplitude shift keying (ASK)
>.Frequency shift keying (FSK)
>.Phase shift keying (PSK)
>. Quadrature Amplitude modulation (QAM)
>. Quadrature phase shift keying (QPSK)

Analog-to-analog conversion :-

1. Analog signals are modified to represent analog data. This conversion is also known as Analog modulation. Analog modulation is required when band pass is used.

2. Analog to analog conversion can be done in following three ways :-

>.Amplitude modulation (AM)

>. Frequency modulation (FM)

>. Phase modulation (PM)


THANK YOU VIEWER 

THIS IS PUBLISHED BY.....

ANKESH KUMAR

Email-id-  ankeshk765@gmail.com



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