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Define Edit Expression
These buttons provide quick access to the Equation Editor and to the Math Parameter control
window.
Click
Editor
to open the Equation Editor control window. Use the Equation Editor to create a
math equation for the selected waveform.
Click
Avgs
to open the Adjust Math Parameters control window. Use the Math Parameter control
window to define the number of times that you want to average the selected math waveform.
Predefined Math Expressions
To Use
Click one of the buttons to use one of the predefined math expressions to create the math
waveform based on live (channel) waveforms.
If the channels are active, you can access each expression directly from the Math menu.
Behavior
These buttons provide common predefined math expressions.
The Ch1-Ch2 and Ch3-Ch4 selections create math waveforms that are the difference between two
input waveforms. Use these functions to view differential signals.
The Ch1*Ch2 or Ch3*Ch4 selections create math waveforms that are the product of the two input
waveforms. For example, you can obtain a power waveform by multiplying a voltage waveform
by a current waveform.
Note
The Ch3-Ch4 and Ch3*Ch4 selections are only available with 4-channel models.
Use the Equation Editor to manually create and edit math waveforms.
Guidelines for Working with Math Waveforms
Keep the following guidelines in mind when working with math waveforms:
Keep math waveforms simple. If the math expression becomes too complex, try separating the
expression into more than one math waveform and then combining the waveforms (for
example, Math1 = Math2 + Math4).
You cannot use math waveforms with Fast Acquisition mode.
Math waveforms cannot be turned on without a math expression.
Math waveforms cannot be created from a reference waveform that was saved in Fast
Acquisition mode.
To avoid syntax errors in a math expression, verify the use of operators, parentheses,
operands, and the spelling of functions before activating the math waveform.
The math expression is applied to each frame when working with FastFrame (otherwise
integral, spectral, or other functions may not work properly).
Summary of Contents for TDS5000B Series
Page 36: ...36 AFTDS Differential Signal Adapter...
Page 280: ...280 Blackman Harris window...
