All India Institute of Medical Sciences 2007 AMFI Mutual Fund Basic Module All carry equal ks - Question Paper

Code No: RR421002 Set No. 4
IV B.Tech II Semester Regular Examinations, Apr/May 2006
TELEMETRY AND TELECONTROL
( Common to Electronics & Instrumentation Engineering and Electronics &
Control Engineering)
Time: three hours Max Marks: 80
ans any 5 ques.
All ques. carry equal marks
? ? ? ? ?
1. Draw the sketch of pneumatic Telemetry system and discuss. How is fluid line
characterized? What is the important parameter in such a system? [16]
2. (a) How is propagation of light supported in a fibre optic cable? What is the
critical Angle of incidence and on what factors does it depend?
(b) In a fibre optic cable the refractive indices of the core, cladding and air are 1.49,
1.36 & 1.00 respectively. compute the critical angle and numerical aperture.
[8+8]
3. With neat sketch discuss the basic concept of position telemetering system using
(a) a bridge kind configuration.
(b) Synchros [16]
4. Why are superheterodyne receivers preferred to over others in FM/FM or PCM
transmission systems? Draw the schematic block diagram of a superheterodyne
receiver and discuss its operation. [16]
5. (a) Draw the block diagram of digital to digital PCM telemetry and analog to
analog PCM telemetry link.
(b) discuss about De-commutator counters. [8+8]
6. (a) What is a multimode graded index fibre and discuss about it with necessary
figures and equations.
(b) elaborate single mode fibres and discuss them in detail with necessary figures
and equations. [8+8]
7. discuss briefly analogue Tele control methods with time variable transmission sig-
nal. [16]
8. List and briefly discuss the environmental and interface conditions of Tele control
apparatus.

Earning:   Approval pending.