Electronic Instruments and Measurements - Dec 2011

Electronics & Telecomm. (Semester 3)

TOTAL MARKS: 80
TOTAL TIME: 3 HOURS (1) Question 1 is compulsory.
(2) Attempt any three from the remaining questions.
(3) Assume data if required.
(4) Figures to the right indicate full marks.

Attempt any FOUR from the following

1 (a) Explain various sources of errors in measurement system(5 marks) 1 (b) Piezo electric effect and its application.(5 marks) 1 (c) Application of Network Analyser.(5 marks) 1 (d) An 8 bit ADC outputs all 1's when Vi=5.1 volts find its (i) Resolution and (ii) Digital output when Vi=1.28 volts.(5 marks) 1 (e) Give construction details of lumped parameter delay line.(5 marks) 1 (f) What are objectives of Data Acquisition System?(5 marks) 2 (a) Explain phase shift keying with block diagram. State its advantage and disadvantage.(10 marks) 2 (b) With the help of block diagram explain DC Power supply. Also explain constant voltage mode and constant current mode.(5 marks) 3 (a) Differentiate Sensors and Transducers, and state five examples of each(5 marks) 3 (b) Explain frequency selective Analyzer and state applications of wave analyzer(5 marks) 4 (a) Explain R-2R ladder type digital to analog convertor. State its advantages.(10 marks) 4 (b) Explain digital storage oscilloscope with suitable block diagram.(10 marks) 5 (a) Explain one of the type of photoelectric transducer. State its application.(10 marks) 5 (b) What are different types of telemetry system? And explain any one.(10 marks) 6 (a) What do you mean by universal counter? Explain and state its advantage.(10 marks) 6 (b) Find the bandwidth of a CRO if a single having 17 microsecond rise time is displaced with 21 microseconds rise time on tne CRO.(10 marks)

write shorts notes (any four)

7 (a) Q-meter(5 marks) 7 (b) Significance of 3-1/2 and 4-1/2 Digit(5 marks) 7 (c) Automatic test system(5 marks) 7 (d) Specification of spectrum analyzer.(5 marks) 7(e ) Automation in digital instruments.(5 marks)