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Code : T502 Register Number
V Semester Diploma Examination, ApriUMay 2013
Time:3Hoursl Note : (i) Section lis compulsory.
lMax.Marks:l00
SECTION
(i) (ii)
(iii) (iv)
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Fill in the blanks :
A rectangular waveguide behaves like a The distance of Geostationary satellite from surface hns. _ Each cell site contains a station.
_.
The most common radar display is The Doppler frequency is caused due to motion between sender and receiver. Explain operation of single mode step index fibre cable.
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of the earth is
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Answer any two full questions from remaining sections.
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(ii)
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ADVANCED COMMI.]IIICATION
SECTION-II
(a) (b)
What are the factors that affect radar range
Define:
(i) (ii)
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2.
(c)
PRF Peak power Explain with a block diagram the operation of a radar system.
4
(a) O)
Explain the operation of FMCW radar. With a diagram explain operation of reflex klystron.
7
(a)
Mention the factors that affect the use of conventional tubes at microwave
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3.
(b)
(c)
8
frequencies.
t
Explain how the microwave signals propagates through a waveguide. Explain the operation of Adcock antenna.
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2
SECTION Define the following
Uplink Downlink
(iii) Geostationary (iv)
satellite
Asyrchronous satellite
8
(b)
What is satellite orbit ? Explain different types of satellite orbits.
7
(a) (b)
Explain briefly the operations of GPS.
7
Explain the operation of DBS TV system.
(a) Explain briefly operation of GIS, O) Mention any five features of GSM system. (c) Explain the process of frequency hopping.
8
SECTION
Explain different types of losses in optical fibre communication. With a block diagram explain the operation of optibal communication systems. Explain briefly the difference between step index & graded index optic fibres.
(a) (b)
Explain the operation of semi conductor laser diode. Explain operation of time division multiplexing with block diagram.
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(a) O) (c)
(a) Write a brief note on optic fibre in CATV system. (b) Explain operation of FDDI. (c) Write a brief note on fibre optic splices.
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