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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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(v)

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of the earth is

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1. (a)

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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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7

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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.

ed i

aw

(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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Advanced Communication May 2013 (2009 Scheme).pdf ...

O) Explain operation of single mode step index fibre cable. 2. 3. SECTION-II. (a) What are the factors that affect radar range. (b) Define: (i) PRF. (ii) Peak power. (c) Explain with a block diagram the operation of a radar system. (a) Explain the operation of FMCW radar. O) With a diagram explain operation of reflex klystron.

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