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Circuit Lab.

Circuit Lab. Experiment-3 Operating the function generator and digital oscilloscope. Quiz. A(t)=5.sin(100 p t) Draw the graphic of A(t) signal Calculate amplitude, frequency and time period. FUNCTION GENERATOR GW INSTEK SFG-2120. Generation of Test Signals Square Wave Sine Wave

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Circuit Lab.

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  1. Circuit Lab. Experiment-3 Operating the function generator and digital oscilloscope

  2. Quiz • A(t)=5.sin(100pt) • Draw the graphic of A(t) signal • Calculate amplitude, frequency and time period.

  3. FUNCTION GENERATORGW INSTEK SFG-2120 • Generation of Test Signals • Square Wave • Sine Wave • Triangular Wave • Digitally Controlled Frequency (0.1 Hz ... 20 MHz) • Manually Controlled Amplitude (0...10V (pp)) • 50 ohm BNC output • TTL/CMOS BNC output • Counter BNC input for frequency counter • Amplitude, Frequency Modulation, Variable Mod. index

  4. FUNCTION GENERATORGW INSTEK SFG-2120

  5. FUNCTION GENERATORGW INSTEK SFG-2120

  6. How can we see the signal? • Oscilloscope • GW Instek GDS 1102 • 100 MHz • 2 channels • 1 M ohm input impedance • FFT, A*B, A+B, A-B • Digital Measurements (Vpp, Vdc, Frequency...) • Saving Graphical Data (SD Card Interface)

  7. DIGITAL OSCILLOSCOPEGW Instek GDS-1102

  8. Connection • BNC Connectors (RF Connector) (British Naval Connector)

  9. Cable • RG-58/U Coaxial Cable • Low-power signal and RF connections • Characteristic impedance: 50 ohm A: outer plastic sheath B: woven copper shield C: inner dielectricinsulator D: copper core

  10. Oscilloscope Probe

  11. Equivalent Circuits 1x Probe R1=1M ohm C1=1-10 pF 10x Probe R1=9M ohm C1=1-10pF Oscilloscope Input R2=1M ohm C2=20 pF

  12. Osilloscope Probe Test • Check the probe set : 1x or 10x • Connect the BNC connector of the Oscilloscope Probe to CH1 • Connect the test connector of the oscilloscope probe to Test Output • Press Run/Stop Key • Measure the frequency and the amplitude of the test signal

  13. Osilloscope Probe Compensation

  14. Volt Division of CH1 Volt Division of CH2 Time Division

  15. 1st Job: • A(t)=5.sin(100pt) • Amplitude? • peak (p) • peak-to-peak (pp) • Time period? (seconds) • Frequency? (Hertz)

  16. 2nd Job • Derive the sine signal using function generator and oscilloscope

  17. 3rd Job • Generate • 4 V (p-p) • 10 kHz • Square Wave

  18. 4th Job • Generate • 100 mV (p-p) • 1 kHz • Sine Wave

  19. Cursors

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