222 Agilent InfiniiVision 3000 X-Series Oscilloscopes User's Guide
14 Measurements
Preshoot
Preshoot is distortion that precedes a major edge transition expressed as a
percentage of Amplitude. The X cursors show which edge is being
measured (edge closest to the trigger reference point).
Average
Average is the sum of the levels of the waveform samples divided by the
number of samples.
Where x
i
= value at ith point being measured, n = number of points in
measurement interval.
The Full Screen measurement interval variation measures the value on all
displayed data points.
The N Cycles measurement interval variation measures the value on an
integral number of periods of the displayed signal. If less than three edges
are present, the measurement shows "No edges".
The X cursors show what interval of the waveform is being measured.
Rising edge preshοot =
local Maximum − D Top
Amplitude
× 100
Falling edge preshοot =
Base − D local Minimum
Amplitude
× 100
Preshoot
local Maximum
local Minimum
Base
Top
Preshoot
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