Circuit Laboratory

Experiment-3

Operating with theFunction Generator & Oscilloscope

Function Generator Oscilloscope

An electronic test equipment used to generatedifferent types of electrical waveforms (i.e.periodical and/or modulated signals) over a widerange of frequencies.

An electronic test equipment used to measuredifferent types of electrical waveforms (i.e.periodical and/or modulated signals) over a widerange of frequencies.

Function Generator Oscilloscope

For Example:

𝐴(𝑡) = 5. sin(100𝜋𝑡)

• You can generate such a signal with 5V amplitude and 50Hz frequency usingfunction generator.

• You can measure such a signal anddetermine its amplitude frequency andtime period using an oscilloscope.

Function Generator

• Generation of Test Signals• Sine Wave• Square 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

GW INSTEK SFG-2120

SPECIFICATIONS

Function GeneratorGW INSTEK SFG-2120

Function GeneratorGW INSTEK SFG-2120

Function GeneratorGW INSTEK SFG-2120

Function GeneratorGW INSTEK SFG-2120

2DEFAULT

DEFAULT Settings

Oscilloscope

• Frequency: DC-100MHz• 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)

SPECIFICATIONS

DIGITAL OSCILLOSCOPE GW Instek GDS-1102

Connections

BNC Connectors (RF Connector)Coax Cable

Low-power signal and RF connections,Characteristic impedance: 50 ohm

A: outer plastic sheathB: woven copper shieldC: inner dielectric insulatorD: copper core

Oscilloscope Probe Crocodile Cable (For Func. Gen.)

Oscilloscope Probe Test

Osilloscope Probe Compensation

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

• Check the probe set : 1x or 10x• Connect the BNC connector of the Oscilloscope

Probe to CH1• Connect the probe to Test Output of the

oscilloscope• Press Run/Stop Key• Measure the frequency and the amplitude of the

test signal

Measurement with the Oscilloscope

1st Job:

• A(t)=5.sin(100pt)

–Amplitude: ………. • peak (p) : ……….• peak-to-peak (pp) : ……….

–Time period (seconds) : ……….–Frequency (Hertz) : ……….

• Derive the sine signal using function generatorand monitore with the oscilloscope

2nd Job:

Generate:• 4 V (p-p) • 10 kHz Square Wave, Sine Wave and Triangular Wave

• Derive the signals using function generator andmonitore with the oscilloscope

3rd Job:

Generate:• 100 mV (p-p) • 1 kHz Square Wave, Sine Wave and Triangular Wave

• Derive the signals using function generator andmonitore with the oscilloscope

The Usage of Cursors

Determination of time periode using Cursor function. (Step1)

The Usage of Cursors

Determination of time period using Cursor function. (Step2)

The Usage of Cursors

Determination of time period using Cursor function. (Step3)