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Oscilloscope

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The explanation of a Osilloscope

The explanation of a Osilloscope

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  • 1. OSCILLOSCOPE Academic Presentation Prasad Pawaskar DETE 3 SEM SPN NO. - 0903055
  • 2. • Introduction. • Working Principle. • Construction. • Front Panels. • Back Panels. • Applications. • Types. • Advantages & Disadvantages. • Conclusion. CONTENTS:
  • 3. • Oscilloscope is an very important test instrument in electrical and electronics field. • It is used to look at the 'shape' of electrical signals by displaying a graph of voltage against time on its screen. • It is like a voltmeter with the valuable extra function of showing how the voltage varies with time. • Oscilloscopes are commonly used to observe the exact wave shape of an electrical signal. INTRODUCTION:
  • 4. CATHODE RAY TUBE: • This tube can be considered as the heart of any Oscilloscope: Electron Gun
  • 5. WORKING PRINCIPLE: • Oscilloscope operational figure is as shown aside: • It basically works on the amplifier and triggering networks.
  • 6. H.T. supply heater supply y plates x plates +- phospho r screen anode electron gun produces a beam of electrons light produced on the screen by electron beam a p.d. across the y plates deflects the trace vertically a p.d. across the x plates deflects the trace horizontally
  • 7. DIAGRAMMATICAL LOGIC OF OSCILLOSCOPE WORKING: Switch on the oscilloscope Set AC/GND/DC by Y-input. SET Trigger level to AUTO SET Time- Base and Y- shift & X- shift SET Intensity and Focus Brightness
  • 8. CONSTRUCTION:
  • 9. FRONT PANELS: • FOCUS CONTROL:- This control adjusts CRT focus to obtain the sharpest, most-detailed trace. • INTENSITY CONTROL:- This adjusts trace brightness. • BEAM FINDER:- It limits the beam deflection. • GRATICULE: The graticule is a grid of squares that serve as reference marks for measuring the displayed trace. • TIME_BASE CONTROLS: These select the horizontal speed of the CRT's spot as it creates the trace; this process is commonly referred to as the sweep. In all but the least-costly modern 'scopes, the sweep speed is selectable and calibrated in units of time per major graticule division.
  • 10. OSCILLOSCOPE: Power Intensity Focus Volt/Div Chann O/P Screen me/Div
  • 11. APPLICATIONS OF OSCILLOSCOPES: • 1. DC VOLTAGE MEASUREMENT • 2. MEASUREMENT OF THE VOLTAGE BETWEEN TWO POINTS ON THE WAVEFORM • 3. ELIMINATION OF UNDESIRED SIGNAL COMPONENTS • 4. TIME MEASUREMENTS • 5. TIME DIFFERENCE MEASUREMENTS • 6. PULSE WIDTH MEASUREMENTS • 7. PULSE RISETIME AND FALLTIME MEASUREMENTS • 8. PHASE DIFFERENCE MEASUREMENTS • 9. FREQUENCY MEASUREMENTS • 10. RELATIVE MEASUREMENTS • 11. SWEEP MULTIPLICATION (MAGNIFICATION) • 12. APPLICATION OF X-Y OPERATION
  • 12. TYPES OF OSILLOSCOPE: CRO Digital Sampling Digital Phosphor Mixed- Signal Hand-held PC-based PCO Dual- Beam Analog Storage Digital Digital Storage