Keysight Technologies DSO-X 2002A, User Manual

Page: 190 / 352

190 Keysight InfiniiVision 2000 X-Series Oscilloscopes User's Guide
14
Measurements
Average
Average is the sum of the levels of the waveform samples divided by the number
of samples.
Where x
i
= value at i th 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.
DC RMS
DC RMS is the root-mean-square value of the waveform over one or more full
periods.
Falling edge preshοot =
Base − D local Minimum
Amplitude
× 100
Preshoot
local Maximum
local Minimum
Base
Top
Preshoot
Average =
∑ x
i
n
RMS (dc) =
∑
i =1
n
x
i
2
n