Oscilloscope calculations worked examples David Bailey 27102021 Class

Oscilloscope calculations worked examples David Bailey 27/10/2021 © Class Leading Ltd. Free for non-commercial educational use provided that this copyright notice is included. 1

Contents Calculating peak p. d. Calculating peak-to-peak p. d. Calculating r. m. s. p. d. Calculating time period Calculating frequency 27/10/2021 © Class Leading Ltd. Free for non-commercial educational use provided that this copyright notice is included. 2

Calculating peak p. d. NB: the peak value is from the 0 V line to the top of the peak value Example: sensitivity setting = 0. 2 V/div peak p. d. = 2 div x 0. 2 V/div = 0. 4 V 27/10/2021 © Class Leading Ltd. Free for non-commercial educational use provided that this copyright notice is included. 3 Return to menu

Calculating peak-to-peak p. d. peak-to-peak value Example: sensitivity setting = 0. 2 V/div peak-to peak p. d. = 4 div x 0. 2 V/div = 0. 8 V 27/10/2021 © Class Leading Ltd. Free for non-commercial educational use provided that this copyright notice is included. 4 Return to menu

Calculating r. m. s. p. d. peak value Example: sensitivity setting = 0. 2 V/div peak p. d. = 2 div x 0. 2 V/div = 0. 4 V peak p. d. r. m. s. p. d. 27/10/2021 = 0. 28 V © Class Leading Ltd. Free for non-commercial educational use provided that this copyright notice is included. 5 Return to menu

Calculating time period NB: reading it by using the whole width of the screen reduces error Example: time base setting = 1 ms/div = 1 x 10 -3 s/div time period = (10 div / 2 waves) x 10 -3 s/div = 5 x 10 -3 s 27/10/2021 © Class Leading Ltd. Free for non-commercial educational use provided that this copyright notice is included. 6 Return to menu

Calculating frequency Example: time base setting = 1 ms/div = 1 x 10 -3 s/div wave time = (10 div / 2 waves) x 10 -3 s/div = 5 x 10 -3 s frequency = 1/T Time period T (time for one cycle) = 1 / 5 x 10 -3 s = 200 Hz 27/10/2021 © Class Leading Ltd. Free for non-commercial educational use provided that this copyright notice is included. 7 Return to menu