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5-23
Making Measurements
Integrate
Integrate
∫ dt (integrate) calculates the integral of the selected source. You can use
integrate to calculate the energy of a pulse in volt-seconds or measure the area
under a waveform.
∫ dt plots the integral of the source using the "Trapezoidal Rule". Equation is as
follows:
Where
I = integrated waveform
∆t = point-to-point time difference
y = channel 1, 2, or function 1 + 2, 1 – 2, and 1 * 2 data points
c
o
= arbitrary constant
i = data point index
In Delayed sweep horizontal mode, the
∫ dt function does not display in the
delayed portion of the display.
•Press the Math key, press the ∫ dt softkey, then press the Settings softkey
if you want to change the source, scaling, or offset for the integrate
function.
Source selects the source for ∫ dt. The source can be any analog channel, or
math functions 1 + 2, 1 – 2, and 1 * 2.
Scale allows you to set your own vertical scale factors for
∫ dt expressed in
unit-seconds/division, where units can be V (Volts), A (Amps), or W (Watts).
Units are set in the channel Probe menu. Press the Scale softkey, then turn the
Entry knob to rescale
∫ dt.
Offset allows you to set your own offset for the
∫ Vdt math function. The offset
value is in unit-seconds where units can be V (Volts), A (Amps), or W (Watts)
and is re pr es en te d b y t he ce nte r gra tic ul e o f t he di sp lay. Pre ss th e Offset s of tk ey,
then turn the Entry knob to change the offset for
∫ dt.
n
I
n
= c
o
+ ∆t ∑ y
i
i=0