Sunday, 4 December 2011


An oscilloscope is a measurement and testing instrument thet measures AC waveforms with two-axis on screen :

1. Vertical Axis

Represent the voltage.

2. Horizontal Axis

Represent the time or phase angle.

The quantities can be shown on the screen of an oscilloscope :

1. Amplitude ( Peak value, Vp).
2. Peak-to-peak value (Vpp).
3. Period (T) and frequency (f).

Example :

From figure as shown below, shows a AC sine wave displayed on the screen of an oscilloscope. The voltage knob is set at 5 v/div. Calculate the Peak-to-peak value (Vpp).

Solution :

The variable value (v/div) = 5v/div
The number of vertical division = 6.4 division.

Therefore, peak-to peak value (Vpp) :

= 5v/div X 6.4div
= 32V

Vp = Vpp/2 

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