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2003 Course Electronic Measurement Systems

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Total No. of Questions : 12] [Total No. of Pages : 3 [3764]-230 P1476 B.E. (E & TC) ELECTRONIC MEASUREMENT SYSTEMS (2003 Course) Time : 3 Hours] [Max. Marks : 100 Instructions to candidates : 1) Answer Q.1 or Q.2, Q.3 or Q.4, Q.5 or Q.6 questions from Section I and Q.7 or Q.8, Q.9 or Q.10, Q.11 or Q.12 questions from Section II. 2) Answers to the two sections should be written in separate books. 3) Neat diagrams must be drawn wherever necessary. 4) Figures to the right indicate full marks. 5) Use of logarithmic tables, slide rule, Mollier charts, electronic pocket calculator and steam tables is allowed. 6) Assume suitable data, if necessary. SECTION - I Q1) a) What is nonconfirmity in error specification? How is it taken into consideration in error studies and instrument specifications. [8] b) The output of a pressure transducer is recorded over it s full scale range of 50 bars as shown below: [8] Calibration pressure O/P Reading Bars 0 0 5 5 10 9.8 15 14.8 20 19.9 25 25.1 30 30.1 35 35.3 40 40.2 45 45.1 50 50.0 P.T.O. i) Determine the static sensitivity of the device. ii) Calculate the maximum non-linearity of the device. iii) If the relative error is observed to be 0.1 bar, calculate overall accuracy of the device. Q2) a) b) c) OR Why True RMS meter is always specified by crest factor? Explain. [3] Write short note on Vector Impedance Meter . [5] Explain in detail working of LCR - Q meter. [8] Q3) a) What do you mean by calibration? Explain calibration procedure for 3 1/2 digit display for 0 - 200 V AC with the help of neat block diagram.[8] b) List different statistical characteristics encountered to measure the central tendency of distribution. Calculate atleast two characteristics for the following voltage readings. [8] Voltage 10 11 12 13 14 Frequency of reading 03 12 18 12 03 OR Q4) a) b) Q5) a) b) Q6) a) b) [3764]-230 Explain totalizing mode of frequency counter. Describe various plug-in units in frequency counter. [8] Write detailed specifications of typical Universal / Frequency counter. Describe various errors in frequency measurement. [8] Explain the effect of resistive, inductive and capacitive load on CRO probes. List various types of CRO probes. Explain any one type of probe in detail. [10] Explain in detail Time Base Generator in CRO. [8] OR Suggest suitable instrument for the following measurement and explain its block diagram. [10] i) Peak value. ii) rms value. iii) Time interval. iv) Duty cycle. v) Windowing & FFT analysis. List typical specifications for the same and explain any two specifications in detail. Explain various sampling methods used in DSO. [8] 2 SECTION - II Q7) a) Suggest suitable instrument for following type of measurement. Give its block diagram * 1 mV AM signal for which channel Bandwidth and side band power, modulation index to be found out *. [6] b) What is the primary difference between harmonic distortion analyzer and wave analyzer? [4] c) With the help of neat block diagram explain the working of Logic Analyzer. [8] OR Q8) a) b) Q9) a) b) Give typical specifications of Logic Analyzer. Explain how logic analyzer can be used in fault finding in digital circuits. [10] Draw and explain block diagram of distortion factor meter. [8] Explain test set up for conducted EMI. [8] State and explain various measurements required for testing of receivers. [8] OR Q10)a) Draw and explain block diagram of network analyzer and state its applications. [8] b) What are the sources of errors to uncertainty in network analyzer system. [8] Q11)a) Explain Electrical, Mechanical and functional specifications of IEEE 488 interface standard. [8] b) In manufacturing setup, an audio system is to be tested with fast results. Suggest suitable method and explain it s setup with block diagram. [8] OR Q12)Write short notes on: a) Features of LABVIEW. [8] b) Virtual instruments and its components. [8] Y [3764]-230 3

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