1. Time Varying Signals

2. DC and AC Signal DC Signal: constant currents and voltages
AC Signal: time-varying currents and voltages

3. Sinusoid Signal
A- Peak value
B- Peak to Peak
Value
C- Time period

4. Mathematical Representation
Sinusoid = A + B cos (t + )
Where
A – DC offset
B – Amplitude
=2f where f is frequency of sinusoid
 = phase shift

5. A.C. Signal Analysis FUNCTION GENERATOR (Equivalent to Power supply)
OSCILLOSCOPE
(Equivalent to Multi-meter)

6. FUNCTION GENERATOR

7. FUNCTION GENERATOR

8. Things to Remember Function – Select between Sinusoid, Square and
Triangle wave.
Frequency Range- Allows you to select
Frequency of the wave.
Amplitude – Allows you to set the amplitude
of the wave

9. Display Of Signal - Oscilloscope
Front Panel

10. Front Panel Of Oscilloscope
Acquiring
Signal
User set
Condition

11. Run Control Menu
Run/Stop (Green): Instrument is continuously acquiring data
Run/Stop (Red): Instrument has stopped Acquiring data
SINGLE : Instrument will wait for the user defined event (typically voltage set by the user)

12. Trigger Menu
Trigger tells the oscilloscope when to start acquiring data. Normally edge triggering is done

13. Triggering modes
Normal mode: Displays a waveform when the trigger conditions are met. Used for very short signals
Auto mode: Displays a waveform when the trigger conditions are met. Used for all signals
Auto-level mode: can be used only when EDGE
is selected on the front panel

14. Coupling Modes
DC Coupling : Allows both D.C. and A.C. signal to flow in to the trigger path.
AC coupling : Allows A.C only

15. Horizontal & Vertical AdjustmentsB
A & B : Horizontal Controls
C & D: Vertical Controls C D

16. QUIZ – NEXT WEEK ( BASED ON OSCILLOSCOPE)