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TDS 620A, 640A, & 644A User Manual
Waveform Math
You can mathematically manipulate your waveforms. For example, you might
have a waveform clouded by background noise. You can obtain a cleaner
waveform by subtracting the background noise from your original waveform.
This section describes the invert, add, subtract, divide, and multiply waveform
math features. If your oscilloscope is equipped with Advanced DSP Math
(optional on TDS 620A & TDS 640A), see
Fast Fourier Transforms
on
page 3-38,
Waveform Differentiation
on page 3-150, and
Waveform Integra-
tion
on page 3-154.
To perform waveform math, press the MORE button to bring up the More
menu (Figure 3-84). The More menu allows you to display, define, and manip-
ulate three math functions.
Figure 3-84: More Menu
Math1, Math2, and Math3
1. Press MORE ➞ Math1, Math2, or Math3 (main) to select the waveform
that you want to display or change.
Operation