User`s guide

5-23

Making Measurements

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

= 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.

= c

+ ∆t ∑ y

i=0