330
Select a function, build an
expression, and apply to
the waveform
6.
Select the Time, Freq, or Meas tabs to display the available
functions.
7.
Click a function button to enter the function in the math
expression. Click an operand button (+, -, *, /) to insert an
operand.
8.
Use the Home and arrow buttons to move within the math
expression. Use the Bksp (backspace) button to delete
portions of the expression.
9.
Click Apply to apply your new math expression to the
math waveform.
Apply averaging
10.
Click Avgs to open the Math Parameters control window.
The controls in the window apply to the math waveform
defined by the expression.
11.
Select one of the Mathn = controls, and set the number of
averages using the multipurpose knobs or pop-up
keypad. This number of averages affect math waveforms
if the Avg() function is used.
Apply expression to
waveform
12.
Once you have defined the math expression to your
satisfaction, click Apply. Apply is available on the
Equation Editor and Spectral Setup control windows.
Using Math Waveforms
Use the same techniques to work with math waveforms that you use with channel waveforms.
This procedure demonstrates some common operations that you can perform on math waveforms:
Note
Each math waveform that you create derives its horizontal scale and position from the sources you
include in its math expression. You can adjust these controls for the source waveforms, and your
adjustments are reflected in the math waveform. You can also magnify math waveforms using
MultiZoom, and use the mouse for positioning.
Prerequisites
1.
A math waveform must be defined and displayed.
Select and display
2.
Click the Math toolbar button to open the Math Setup
control window.
3.
Select the tab for the math waveform that you want to work
with.
If the waveform that you select is not defined, use the
Creating a Math Waveform procedure on page 329 to
define the math waveform.
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