2. Push FFT button.
The oscilloscope shows the default FFT screen. The lower main screen
shows the FFT waveform.
Use the Vertical Position knob of the source channel to move the FFT
waveform up or down.
3. Push Source wfm side-menu button to toggle the display of the source
waveform (at the top of the screen) On or Off.
4. Push the Source side-menu button and use Multipurpose knob to set the
source to channel 1 or 2.The default source is whatever channel was selected
before opening the FFT window.
Analyzing a waveform
TBS1000C Series Oscilloscopes User Manual 111