Maharashtra State Board of Technical Education 2007 Diploma Electronics and Communication Communication System II - Question Paper
Monday, 06 May 2013 02:00Web
3 Hours / 100 Marks
Instructions - 1. All ques. are compulsory
2. Illustrate your answers with neat sketches wherever
necessary.
3. Figures to the right indicate full marks.
4. presume suitable data, if necessary.
1. Attempt any 5 of the following: MARKS:20
a) What is velocity modulation?
b) Write 4 application of Magnetron
c) Differentiate TE and TM modes.
d) What is waveguide? With neat sketch discuss its operations.
e) Write 4 application of Radar system.
f) Explain in brief geostationary satellite.
g) What is data compression and why it is used in fax system.
2. Attempt any 2 of the following: MARKS:16
a) With neat sketch and applegate diagram discuss reflex klystron
b) Explain how Gunn domains are form. Write applications of Gunn diode.
c) Draw neat sketch of hybrid T and discuss its working.
3. Attempt any 2 of the following: MARKS:16
a) Explain working principle of MTI radar with block diagram
b) Draw block diagram of ground station discuss working of every block.
c) Explain telemetry subsystem in satellite.
4. Attempt any 2 of the following: MARKS:16
a) Draw discuss block diagram of WILL (Wireless In Local Loop) system
b) With neat block diagram discuss mobile phone system
c) What is hand off? discuss delayed hand off.
5. Attempt any 2 of the following: MARKS:16
a) With block diagram discuss cordless telephone.
b) Explain additional services given by telephone exchanges
c) Compare LED and Laser
6. Attempt any 2 of the following: MARKS:16
a) Explain advantages of optical fibre cable cover copper cable.
b) With block diagram of OTDR discuss how length of fibre is measured?
c) Explain the scanning mechanism used in FAX
Earning: Approval pending. |