Manipulating Waveforms
3–8
TDS 340A, TDS 360 & TDS 380 User Manual
Displaying Math Waveforms
A TDS 300 Series oscilloscope performs math operations on one or both channel
waveforms. Using one channel waveform, the oscilloscope can calculate a Fast
Fourier Transform (FFT) to display the frequency content of a signal. Using both
channel waveforms, the oscilloscope can add or multiply them or subtract one
from the other and display the result as a math waveform.
To activate the math waveform, press the MATH button, shown in Figure 3–6.
Math
Figure 3–6: The MATH button
To choose one of the arithmetic math functions, select a formula from the side
menu (Ch1 + Ch2, Ch1 – Ch2, Ch2 – Ch1, or CH1 * Ch2). Figure 3–7 shows a
square wave on Channel 2 added to a sine wave on Channel 1. For more
information about the FFT math function, refer to the section Using the FFT on
page 3–31.
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