Answer / rinkesh

because in the digital communication there are only two
voltage levels are used to communicate(to transfer or to
receive the signal), that are high voltage(1) and low voltage
(0). And easier to control the devices used in this type of
communication system.

Answer / ravi kumar

In digital signals, there are the signals in the form of 0
and 1 . so if any unauthorised user access the information
then can't understand the information.so for security
purpose, this technique is used rather then analog
technique.

Answer / preeti kumari(college of bio-m

1)almost all electronic devices use digital signals,because they remain accurate in shape and amplitude.2)transmission is at a higher rate and with a wider broadband width.3)it enables multi-directional transmission simultaneously.4)there is minimal electromagnetic interference in digital technology

Answer / pavithranagamani

Digital signals have only two levels such as binary 0 and 1.so if noise is interfered,then it can be easily detected and recovered.Thus the error recovery is greatly utilised.But in analog signal,the signal has various voltage level at various time.

Answer / peter jensen

My business is camera stabilizers for motion picture cameras.

We use analogue servo systems because the analogue servo loop is much smoother and stability is much better than digital servo systems. Operating a high performance analogue servo stabilizer (panning/tilting/rolling the camera) is smoother, powerful and trouble-free.

Answer / mahendra

In the nature we r having all the signals in analog form and
some of these signals can not processed in the digital
systems.so,,we convert these analog signals into digital
signals and preferred.

Answer / bala kumar

simple thing is it is easier to control than analog and it also offers less room for noise..
so the signal transmitted is more accurate..

interviewr asked about sampling theorem and i said the common def.(i.e ...sam freq must >=s max freq in the signal for a sampled signal to recover without alising).he asked that i have a sin signal of freq 1hz and i sampled at two zero amplitude points can it be recoverable without aliasing????

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syllabus for elactronics and comm. engg. for the written of Airport authority of India for the post Jr.Exicutive (Electronics)

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1,8,28,99,412

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Is a duplex also convert an electromagnetic signal into electrical signal and vice-versa??

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