Reference
3Ć154
Waveform Integration
Advanced DSP Math
(optional on TDS 620A & TDS 640A), provides
wave-
form integration
that allows you to display an integral math waveform that is
an integrated version of the acquired waveform. Such waveforms find use in
the following applications:
H
Measuring of power and energy, such as in switching power supplies
H
Characterizing mechanical transducers, as when integrating the output of
an accelerometer to obtain velocity
The integral math waveform, derived from the sampled waveform, is com-
puted based on the following equation:
y
(
n
)
+
scale
n
S
i
+
1
x
(
i
)
)
x
(
i
*
1
)
2
T
Where: x(i) is the source waveform
y(n) is a point in the integral math waveform
scale is the output scale factor
T is the time between samples
Since the resultant math waveform is an integral waveform, its vertical scale
is in volt-seconds (its horizontal scale is in seconds). The source signal is
integrated over its entire record length; therefore, the math waveform record
length equals that of the source waveform.
To obtain an integral math waveform:
1. Connect the waveform to the desired channel input and select that chan-
nel.
2. Adjust the vertical and horizontal scales and trigger the display (or press
AUTOSET).
3. Press MORE ➞ Math1, Math2, or Math3 (main) ➞ Change Math wave-
form definition (side) ➞ Single Wfm Math (main).
4. Press Set Single Source to (side). Repeatedly press the same button
until the channel source selected in step 1 appears in the menu label.
Description
Operation
To Next Page
Loading...
Need help?
General
