Tektronix CSA7154, User Manual

Page: 263 / 480

CSA7000 Series, TDS7000 Series, & TDS6000 Series Instruments User Manual
3- 185
Creating and Using Math Waveforms
Once you have acquired waveforms or taken measurements on waveforms, the
instrument can mathematically combine them to create a waveform that supports
your data-analysis task. For example, you might have a waveform obscured by
background noise. You can obtain a cleaner waveform by subtracting the
background noise from your original waveform (note that the background noise
you subtract must be identical to the noise in your signal). Or, you can integrate
a single waveform into an integral math waveform as shown below.
Source waveform
Math waveform
With spectral analysis you can analyze waveforms in the frequency domain. The
interface is similar to a dedicated spectrum analyzer, relieving you of the burden
of knowing the details of the underlying algorithms (see Figure 3--41).