8/17/2019 ECOM-QB

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Question Bank of ECOM (4TH EE A/B)

Ch. 6: Fundamentas of Tee!ision and Fi"e# O$ti%s

Te%hnoo&'

1. Discuss principle of light transmission in fiber optic cable. Discuss losses

occurs in fiber optic cable

2. Explain the terms: [1] Reflection [2] Refraction [3] Dispersion [4] Diffraction

[5] bsorption [!] "cattering [#] $umerical perture %$&

3. 'ist the a()antages of fiber optic *ommunication.

4. +or a silica optical fiber the refracti)e in(ex of core la,er is 1.5! an( that of 

cla((ing is 1.35. calculate critical angle- relati)e refracti)e in(ex (ifference-

numerical aperture an( acceptance angle.

5. Describe )arious t,pes of losses in +ibers ith its effect.

!. Describe basic structure of fiber optic cable. *ompare single mo(e an( multi

mo(e fibers.

#. Explain a()antages- (isa()antages an( applications of +iber optic

communication.

/. Explain folloing terms %i& total internal reflection %ii& numerical aperture %iii&

gra(e( in(ex fiber 

0. Define the folloing ith respect to fiber optic communication. %i& cceptance

ngle. %ii& $umerical perture.

1. Explain a()antages of fiber optic cable o)er coaxial cable. Dra an( explain

the bloc (iagram of basic fiber optic communication s,stem

11. Dra an( explain t,pical s,stem bloc (iagram of fiber optic communication

s,stem. 'ist optical components use( to interconnect a (igital )oice or (ata

using fiber optic s,stem.

12. Dra bloc (iagram of lac an( hite transmitter an( recei)er an(

mention name of each bloc clearl,.

13. Dra the bloc (iagram of a tele)ision recei)er an( explain each bloc.14. Explain briefl,: ele)ision s,stems an( stan(ar(s.

15. *ompare **6R7 an( 8' "tan(ar(s.

NOTE: Do all numerical co)ere( in *lass.