Agilent Technologies 54621A, User Manual, Page: 193 / 276

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 represented by the center graticule of the display. Press the
Offset softkey,
then turn the Entry knob to change the offset for
∫
dt.
n
I
n
= c
o
+
∆
t
∑
y
i
i=0