Wavecom W61PC V7.5.0 - Manual (Page 255)

WAVECOM Decoder W61PC/LAN Manual V7.5 Classifier (Optional)  245
Press the Classifier button to launch the classifier or select it in one of
the analysis menus or selectors
Press the Start/Stop Classifier button to restart the classification
When the Classifier is launched a label positioned in the left-hand side
of the upper status line indicates the selected frequency range and the
acquisition mode:
FFT Window
The upper FFT window is shown with five signals classified in manual mode.
Classifier Settings
Settings are accessed through the Options | Classifier Settings menu.