STUPIDSID
MU Electronics and Telecom Engineering (Semester 3)
Electronic Instruments and Measurements
May 2012
Electronic Instruments and Measurements
May 2012
Attempt any FOUR from the following
1 (a)
Why is delay line used in the vertical section of Oscilloscope
5 M
1 (b)
What is universal counter?
5 M
1 (c)
Explain capacitive sensors
5 M
1 (d)
Explain various sources of errors in measurement system?
5 M
1 (e)
Explain the significance of 3-1/2 and 4-1/2 digit displays 3-1/2 Digit Display:
5 M
2 (a)
Explain the Elements of digital FFT analyzer with a suitable block diagram.
10 M
2 (b)
What is the basic principle of ADC? Explain the operation of successive approximation type of ADC.
10 M
3 (a)
Explain the principle of working of LVDT. How do stray magnetic fields effect the performance and how it can be protected.
10 M
3 (b)
Draw and explain the block diagram of general purpose CRO.
10 M
4 (a)
Derive the expression for vertical deflection of electron beam in CRT.What is the minimum distance that will allow full deflection of 4cm at oscilloscope screen with deflection factor of 100V/cm and with accelerating potential of 2k.
10 M
4 (b)
Explain PAM telemetry system.
10 M
5 (a)
With block diagram explain the elements of network analyser with its application.
10 M
5 (b)
Draw and explain the block diagram of DSO.Describe the various modes of operations.
10 M
6 (a)
Explain the need of data transmission and telemetry. What are the different modulation methods used in RF telemetry system.
10 M
6 (b)
Write a note on automatic test equipment. A coil with a resistance of 5ohm is connected directly to test terminals of Q-meter, for a 130 pf capacitance of tuning capacitor, resonance is obtained at oscillator frequency of 1MHz.Calculate % error introduced in calculated value of Q by 0.01 insertion resistance.
10 M
7 (a)
Draw and explain true RMS voltmeter with thermocouple. Why there is error in reading a voltmeter calibrated to RMS values when it is used into read signals other then sine wave.
10 M
7 (b)
Explain briefly the different pulse modulation techniques.
10 M
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