Electronic Instruments and Measurements - Dec 2012

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) Classify Transducers(5 marks) 1 (b) Explain the Significance of Rise time and bandwidth of CRO. (5 marks) 1 (c) True RMS meter is always specified by Crest Factor. Justify.(5 marks) 1 (d) Compare different types of ADCs. (5 marks) 1 (e) On what principle does a digital frequency meter operate? (5 marks) 1 (f) State advantages and disadvantages of landline telemetry (5 marks) 2 (a) Compare following temperature transducers with respect to their characteristics, measurement range, applications:RTD, Thermocouple and Thermistors (10 marks) 2 (b) What is the basic principle of wave analyser? Explain heterodyne wave analyser. (10 marks) 3 (a) What is the role of time base generator? What are time base requirements?(10 marks) 3 (b) Explain principle of operation of dual slope type DVM (10 marks) 4 (a) Explain the significance of 3-1/2 and 4-1/2 digit displays 3-1/2 Digit Display:(10 marks) 4 (b) Explain modulation methods used for R.F. telemetry systems(10 marks) 5 (a) Explain modes of operation of DSO (10 marks) 5 (b) Write a note on Applications of Q meter (10 marks) 6 (a) How is displacement measured? State the different transducers for displacement measurement.(10 marks) 6 (b) Explain Performance characteristics of D/A converters (10 marks) 7 (a) Explain Pulse Code Modulation Technique (10 marks) 7 (b) Explain different types of Measurement Errors with Frequency Counter (10 marks)