EXFO OTDR 2 - Manual (Page 73)

Testing Fibers
OTDR 65
Monitoring Fibers in Real-Time Mode
3. If you have the full OTDR application, tap RT. The RT button turns
orange to show that the real-time mode is activated.
4. If you have the full OTDR application, tap Start RT.
OR
If you only have access to the OTDR in Real Time mode, tap Start Real
Time.
Note: The timer is not displayed during real-time acquisition.
5. From the wavelength list, tap the wavelength value (not the checkbox)
corresponding to the wavelength that you want to monitor.
Note: Ensure that the wavelength is highlighted.