Go to a step-by-step procedure for creating math waveforms.
Go to a step-by step procedure for using math waveforms.
Offset position scale and math waveforms
The settings that you make for offset, scale, and position affect the math waveform you obtain. Here are some tips for obtaining a
good display:
â–
Scale and position the source waveform so that it is contained on the screen. (Off-screen waveforms may be clipped,
resulting in errors in the derivative waveform).
â–
Use vertical position and vertical offset to position your source waveform. The vertical position and offset will not affect your
derivative waveform unless you position the source waveform off screen so that it is clipped.
What do you want to do next?
Learn about waveform integration.
Go to a step-by-step procedure for creating math waveforms
Go to a step-by step procedure for using math waveforms.
Waveform integration
The math capabilities of the instrument include waveform integration. This allows you to display an integral math waveform that is
an integrated version of the acquired waveform.
Use integral waveforms in the following applications:
â–
Measuring power and energy, such as in switching power supplies.
â–
Characterizing mechanical transducers, as when integrating the output of an accelerometer to obtain velocity.
The integral math waveform, derived from the sampled waveform, is computed based on the following equation:
Where: x(i) is the source waveform, y(n) is a point in the integral math waveform, scale is the output scale factor, and 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.
Offset and position. When creating integrated math waveforms from live channel waveforms, consider the following:
â–
You should scale and position the source waveform so that it is contained on screen. (Off screen waveforms may be
clipped, which will result in errors in the integral waveform.)
â–
You can use vertical position and vertical offset to position your source waveform. The vertical position and vertical offset
will not affect your integral waveform unless you position the source waveform off screen so that it is clipped.
Oscilloscope reference
DPO70000SX, MSO/DPO70000DX, MSO/DPO70000C, DPO7000C, and MSO/DPO5000B Series 707
To Next Page
Loading...
Need help?
General
