Answer Posted / durga bhantana
modulation is necessary in communication system due to the
following reasons
1)for efficient radiation and reception the transmiting
reciving antennas most antennas have length equal to a
quarter wave length of the frequency used.
2)the energy of the wave depends upon frequency the greater
the frequency of the wave the greater the energy lossesed
by it as the audio signal frequencies are small
therefour ;these cannot be transmitted are larg distamces
it radiated directly into space. the only practical
solution is to modulated a high frequency carrier wave with
audio signal and permit the transmission fo occur of the
this high frequnecy
3)............
Is This Answer Correct ? | 0 Yes | 0 No |
Post New Answer View All Answers
What is the difference between led and lcd?
What is the main differnce between the SCADA and HMI also what is DCS?
What is meant by CDOT in relation to the Communication in BSNL? Explain the term CDOT.
What are the applications of am transceiver.
How does a mobile work?
What is an astable multivibrator?
What is a pointer and does Java support pointers? What is the difference between a JDK and a JVM?
Define digital function generator?
what is meaning of system with diagrams?
Explain design 8421 to 2421 binary code converter?
Pls send Syllabus of Jr.Eng grade2 electronics e.n.no 02/2008 & model qustions to my id amarlalmeppurath@yahoo.com
Why emitter is always forward biased?
How to select lightning arrester for line trap? What are the criteria?
Can i know what will be the cut off criteria for go to final isro interview??
What is the internal structure of op-amp and explain each block in brief?