Differentiate - Agilent Technologies InfiniiVision 4000 X-Series User Manual

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Differentiate

d/dt (differentiate) calculates the discrete time derivative of the selected
source.
You can use differentiate to measure the instantaneous slope of a
waveform. For example, the slew rate of an operational amplifier may be
measured using the differentiate function.
Because differentiation is very sensitive to noise, it is helpful to set
acquisition mode to Averaging (see
page 217).
d/dt plots the derivative of the selected source using the "average slope
estimate at 4 points" formula. The equation is:
Where:
• d = differential waveform.
• y = channel 1, 2, 3, 4, or Math 1, Math 2, Math 3 (lower math function)
• i = data point index.
•
Agilent InfiniiVision 4000 X-Series Oscilloscopes User's Guide
"Square" on page 107
"Absolute Value" on page 108
"Common Logarithm"
"Natural Logarithm"
"Exponential" on page 109
"Base 10 Exponential"
+ 2 − 2
+4 +2
=
8 Δ
data points.
t = point- to- point time difference.
on page 108
on page 109
on page 110
"Selecting the Acquisition Mode"
−
−2 −4
4
Math Waveforms
on
95