ALLInterview.com :: Home Page            
 Advertise your Business Here     
Browse  |   Placement Papers  |   Company  |   Code Snippets  |   Certifications  |   Visa Questions
Post Question  |   Post Answer  |   My Panel  |   Search  |   Articles  |   Topics  |   ERRORS new
   Refer this Site  Refer This Site to Your Friends  Site Map  Bookmark this Site  Set it as your HomePage  Contact Us     Login  |  Sign Up                      
Google
   
 
Categories >> Engineering >> Electronics Communications
 
 


 

 
 Civil Engineering interview questions  Civil Engineering Interview Questions (3157)
 Mechanical Engineering interview questions  Mechanical Engineering Interview Questions (3309)
 Electrical Engineering interview questions  Electrical Engineering Interview Questions (13489)
 Electronics Communications interview questions  Electronics Communications Interview Questions (2396)
 Chemical Engineering interview questions  Chemical Engineering Interview Questions (424)
 Aeronautical Engineering interview questions  Aeronautical Engineering Interview Questions (77)
 Bio Engineering interview questions  Bio Engineering Interview Questions (17)
 Metallurgy interview questions  Metallurgy Interview Questions (80)
 Industrial Engineering interview questions  Industrial Engineering Interview Questions (166)
 Instrumentation interview questions  Instrumentation Interview Questions (2409)
 Automobile Engineering interview questions  Automobile Engineering Interview Questions (109)
 Mechatronics Engineering interview questions  Mechatronics Engineering Interview Questions (38)
 Marine Engineering interview questions  Marine Engineering Interview Questions (45)
 Power Plant Engineering interview questions  Power Plant Engineering Interview Questions (82)
 Engineering AllOther interview questions  Engineering AllOther Interview Questions (1207)
Question
What is the need for modulation?
 Question Submitted By :: Electronics-Communications
I also faced this Question!!     Answer Posted By  
 
Answer
# 1
NEED FOR MODULATION
1) TO REDUCE THE ANTENNA HEIGHT
2) TO MULTIPLEX THE MORE NUMBER OF SIGNALS
3) TO REDUCE THE NOISE & DISTORTIONS
4) TO NARROW BANDING THE SIGNAL
5) TO REDUCE EQUIPMENT COMPLEXITY
 
Is This Answer Correct ?    550 Yes 26 No
Starry
 
Answer
# 2
modulation is neede basically to

i)to increase the bandwidth of the signal
ii)to multiplex the signals
iii)to reduce the interferencemade when we transmit the
signals with nearly same frequency in the audio frequency
range (20-20k)hz.
iv)to favour the complexity of the transmission system
 
Is This Answer Correct ?    308 Yes 41 No
Srikrishna
 
 
 
Answer
# 3
for example if a person is sitting at the bus to go to hyd.
there is a bus which will go to the hyd. it is not the
matter that if the bus goes to the hyd he will also go.
he will also go to the hyd only when he sit in the bus.
here the bus is the carrier & the man is the information.
from this it is clear that modulation is why because the
information which is having less power can't travel large
distances that will put on the carrier which is having
large power that it can travel large distances.
 
Is This Answer Correct ?    275 Yes 50 No
Radhar
 
Answer
# 4
some basicneeds are:-
(1)multiplexing
(2)practiability of anteena
 
Is This Answer Correct ?    267 Yes 72 No
Akanchha Gupta
 
Answer
# 5
1)in shortly it improves the signal strength . means the low
frequency signal can't transmit long distance here low
frequency signal means low strength (weak signal) ,when we
modulate that signal it can be transmitted long distance.
while it transmit long distance i.e., nothing but it's
strength s improves.
2) reduces noise or distortion.
3) multiplexing means we r using frequency translation theorem.
4) we transmit large amount of information at long
distances.i.e., narrow banding the signal.
5) reduce antenna height.
6) we can change the information from one form to another
form. i.e., encryption of data. thats whys we hiding the
information without any hackings.
 
Is This Answer Correct ?    197 Yes 27 No
Sree
 
Answer
# 6
Need of Modulation:

To transfer the message signal from one site another site
without any loss for that we are using modulation.

Modulation classified in three types.

1.Amplitude modulation.
2.Frequency Modulation.
3.Phase Modulation.
 
Is This Answer Correct ?    249 Yes 120 No
Kamalakannan.l
 
Answer
# 7
Low freq signals can't be transmitted for long distance.
Thats why we are modulating the informtion signals.
 
Is This Answer Correct ?    140 Yes 41 No
Vignesh.a
 
Answer
# 8
BASIC NEED FOR MODULATION IS:
1.TO REDUCE ANTENNA HEIGHT
2.TRANSMIT THE INFORMATION TO MORE DISTANCE WITH OUT
INTERFERENCE
3.TO REDUCE BAND WIDTH
EX:SUPPOSE IF U WANT THROUGH A PAPER HAVING INFORMATION TO
YOUR OPP APPARTMENT FROM YOUR APPARTMENT(EX:D=500cm)IF U
SIMPLY THROUGH A PAPER IT WILL NEVER REACH TO THE OPP
APPARTMENT BUT IF YOU USE A STONE.i.e COMBINELY WE CAN
THROUGH BECAUSE STONE HAVE WEIGHT LIKE WISE CARRIER HAVE
MORE POWER THAN BASE SIGNAL THAN WE CAN TRANSMITE THE
SIGNAL.
 
Is This Answer Correct ?    106 Yes 30 No
Girija Shankar
 
Answer
# 9
modulation is scheme under which the the signal is first
modified to suitable form(compress or amplied)and mixwd
with the carrier for trassmission
 
Is This Answer Correct ?    228 Yes 171 No
Guest
 
Answer
# 10
Modulation is a process in which the characteristics of a
signal circuit is caried in accordance with the information
signal which is to be transmitted.
The modulation signal,which is to be transmitted isknown
as Modulating signal.
Need for modulation:
i)multiplexing
ii)practicability of antennas height
iii)frequency conversion
 
Is This Answer Correct ?    63 Yes 30 No
Kabir
 

 
 
 
Other Electronics Communications Interview Questions
 
  Question Asked @ Answers
 
What are the home applications of Microcontroller?   4
state barkhausen criteria?   2
what is diff bet electrical & electronics......   4
What are Drift and Diffusion currents? TCS 12
What is resistive diode? Infosys 1
which are the dream company for electronic engineer????   8
What is the Difference between von neumann and harvard computer architecture? Intel 5
Can any body tell me the procegure about how to use Super Position Theorem to solve any electronics circuit.Please tell me all the steps which used in Super Position Theorem.Thanks   3
can anybody tell me about the syllabus for management trainee post in HAL. I you have papers plz mail me and my mail id is sabithakanthi@gmail.com. NFL 1
What is the function of DISTRIBUTION TRANSFORMER?   2
how AC voltage is generate?   1
What is Front End Tool? TCS 2
 
For more Electronics Communications Interview Questions Click Here 
 
 
 
 
 


   
Copyright Policy  |  Terms of Service  |  Articles  |  Site Map  |  RSS Site Map  |  Contact Us
   
Copyright 2013  ALLInterview.com.  All Rights Reserved.

ALLInterview.com   ::  KalAajKal.com