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Understanding Oscilloscopes: Functions, Types, and Probes Explained

An oscilloscope is a vital instrument for visualizing electrical signals in real-time. It plots voltage (Y-axis) over time (X-axis), and some models feature an intensity axis (Z-axis). Essential for analyzing frequency, phase, and signal components, oscilloscopes can be analyzed through DC and AC signals, rise and fall times, and mathematical functions. Key areas include the control panel settings, such as vertical and horizontal systems and triggers. Various probe types, including passive and active, enhance measurement capabilities for high-frequency and low-voltage signals. Explore the advantages of digital technology in modern oscilloscopes.

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Understanding Oscilloscopes: Functions, Types, and Probes Explained

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Presentation Transcript

  1. Introduction • What is an oscilloscope?

  2. Introduction • A graph-displaying device of electrical signal • X axis: Time • Y axis: Voltage • Z axis: Intensity or brightness

  3. Introduction • Information given by oscilloscopes • Time and voltage • Frequency and phase • DC and AC components • Spectral analysis • Rise and fall time • Mathematical analysis

  4. Control panel of an oscilloscope • Vertical Section • Horizontal Section • Trigger Section

  5. Basic setting • Vertical system • attenuation or amplification of signal (volts/div) • Horizontal system • The Time base (sec/div) • Trigger system • To stabilize a repeating signal and to trigger on a single event

  6. Analog oscilloscope • Real-time display of signals • Block diagram • Sweep generator and vertical amplifier • Earthquake recorder

  7. Digital oscilloscope • Capture and view events • Digital storage oscilloscope (DSO)

  8. Digital oscilloscope (contd.) • Sampling • Interpolation

  9. Advantage of Digital Scope • Trend towards digital. • Easy to use. • One-shot measurement • Recoding • Triggering • Data reuse • Connectivity

  10. Probes • Components

  11. Probes • High quality connector • High impedance (10M) • 50 for high frequency measurement

  12. Passive probe • 10 attenuation • Good for low circuit loading • Suitable to high frequency signal • Difficult to measure less than 10mV signals • 1 attenuation • Good for small signals • Introducing more interference

  13. Active probe • Signal conditioning ⇒ oscilloscope • Require power source • Good for high speed digital signals over 100MHz clock frequency

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