IM 701210-07E
49
MATH
Turn ON/OFF the computation function
Chapter 10
Set computation
Define the computation and set the
computation target channel, scaling, unit,
label, and ON/OFF of Math waveforms.
Number of FFT points
Select the number of points used in performing
the FFT from 1000 (1 k), 2000 (2 k), 5000 (5
k), 10000 (10 k), 20000 (20 k), 50000 (50 k),
and 100000 (100 k).
Computation range
Set the computation start and end points along
the time axis.
Execute the computation
Displayed only on models with the user-
defined computation option (/G2 option).
Waveform Computation Example
Note
Averaging and Peak Computation
• Linear averaging
The values are summed linearly the number of
average counts (the number of acquisitions, 2 to 128,
2
n
steps) and divided by the average count. The
resultant waveform is displayed.
• Exponential averaging
The average is determined by attenuating the effects
of past data according to the specified attenuation
constant (2 to 256, in 2
n
steps). The resultant
waveform is displayed.
• Cycle averaging
Divides one period of computed data into the
specified number of data points (Cycle Count). This
is done across multiple periods of data from the start
to the end position of the computation. Then, the
average of the data points at the same position across
multiple periods is determined. The resulting
waveform is displayed.
• Peak computation
Determines the maximum value at each point of the
computed data and displays the waveform. For every
computation, the new computed value is compared to
the past value and the larger one is displayed.
Note
Average and peak computation
Averaging and peak computation can be
performed on the computed data. Select from
linear average, exponential average, cycle
average, and peak computation.
Digital filter
Select from Gauss, Sharp, and IIR
(Butterworth).
Constant
Set constants to be used in the expression.
Shift computation
Set the amount of phase shift for the case
when SHIFT is specified in the equation.
Threshold level
Set the threshold level for binary computation.
• The following figure shows the menu that appears only on models with the user-defined computation option (/G2 option).
+Computation waveform
–Computation waveform
Waveform to be
computed
Computation
waveform
Waveform to be
computed
Computation
waveform
Summary of Contents for ScopeCorder DL750P
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