:: 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                      
Categories >> Engineering >> Electronics Communications


 Civil Engineering interview questions  Civil Engineering Interview Questions (3156)
 Mechanical Engineering interview questions  Mechanical Engineering Interview Questions (3310)
 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)
Which type of modulation is used in TV transmission?
 Question Submitted By :: Electronics-Communications
I also faced this Question!!     Answer Posted By  
# 1
we use two types AM AND FM
AM is used for video and
FM is used for audio.
Is This Answer Correct ?    198 Yes 20 No
Minu Priya
# 2
Is This Answer Correct ?    173 Yes 16 No
Akanchha Gupta
# 3
In TV Transmission the use of FM is made for Audio
transmission and AM for Video transmission.
Vestigial Sideband modulation (VSB) is used for the
following reasons :
1. Video signal exhibits a large bandwidth and significant
low-frequency content which
suggests the use of VSB
2. The circuitry for demodulation in the receiver should be
simple and therefore cheap.
VSB demodulation uses a simple envelope detection.
But the practical TV signals are not exactly VSB modulated
due to the following
reasons :
I) The power at the transmitter is very high and it would
be expensive to rigidly control the
filtering of sidebands. Instead, a VSB filter is inserted
in the receiver where the powers are
Is This Answer Correct ?    151 Yes 8 No
Mahesh Bhosale
# 4
vegestial side band modulation 
Is This Answer Correct ?    152 Yes 20 No
# 5
Is This Answer Correct ?    108 Yes 13 No
# 6
Is This Answer Correct ?    67 Yes 12 No
# 7
VSB i.e. Vestigal Sideband Modulation is usedfor TV
transmission. Vestige means "PART". The part of side band
is used to transmit the video signal and the remaining is
used for transmitting the voice signal.
Is This Answer Correct ?    42 Yes 13 No
Sanket Patil
# 8
TV signal consists of audio and video signals. for audio FM
is used and for video AM is used. this is in india.
different countries follow different modulation techniques
for audio and video signals. in india we use PAL system.
thats why we use above said modulation techniques.
Is This Answer Correct ?    30 Yes 4 No
Allanki Sr
# 9
in TV transmission for audio signal FM modulation is used
and for video AM modulation is used and also the VSB for AM
in this method we know about AM in this two side bands and
carried also in this only one side band fully and other half
part of other side band
Is This Answer Correct ?    13 Yes 1 No
E.john Ebinezar
# 10
IN TV signal Transmission a technique is employed called
as vestigal sideband technique.
Such technique limits the band to 7mhz per television
channel that could be 11.25mhz since video info. has 5mhz
band and requires 5 x 2= 10mhz + .5(freqency rolloff
response of filter per side band,here usb) + .5 (lsb) + .25
(guard band for sound carrier) = 11.25 mhz for its
transmission. Since usb and lsb are replica of each other
having same variation in their band with the change in
modulating video signal we could remove one of the band
partially. This partial removal technique is what we
called vestigal sideband technique (VSB)

thank you!!
Is This Answer Correct ?    13 Yes 1 No
Sachin Dohre

Other Electronics Communications Interview Questions
  Question Asked @ Answers
Most computers wont use floating point arithmetic .why   2
How many types of Transmission cards are in Flexi BTS? NSN 1
I am doing Bsc in computer science from Atmaram (DU) and want to do Btech from IGNOU or IETE.Is this legal to do both bachelor degree simultaneously or not & frm whr its possible   1
internet applications work on which osi layer? NSN 3
explain 4 maxwell equations??? BEL 1
What is the meaning of '8085' in the name microprocessor 8085? Campus-Interview 2
why ammeter always connect in series for measuring the current?   7
Which type of architecture 8085 has?   3
why the value of 3db down point is 0.707??   2
iam working as field engineer since 3 years so what is the appropriate answer for changing company i'e., why do u want to change ur present company   1
on what basis hardware and software interrupts are defined   5
Is 4 or .5 the smallest of the two numbers   4
For more Electronics Communications Interview Questions Click Here 

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